Form of Securities Purchase Agreement

This SECURITIES PURCHASE AGREEMENT (this “Agreement”), dated as of August 28, 2023, is made by and among Inhibrx, Inc., a Delaware corporation (the “Company”), and the Purchasers listed on Schedule 1 hereto, together with their permitted transferees (each, a “Purchaser” and collectively, the “Purchasers”).

A.    The Company and the Purchasers are executing and delivering this Agreement in reliance upon the exemption from securities registration afforded by Section 4(a)(2) of the Securities Act and/or Rule 506 of R D promulgated thereunder.

B.    The Purchasers, severally and not jointly, desire to purchase and the Company desires to sell, upon the terms and conditions stated in this Agreement, shares of Common Stock (the “Shares”) and Pre-Funded Warrants to purchase shares of Common Stock (the “Pre-Funded Warrants”), having an aggregate purchase price of up to $200,001,000, as more fully described in this Agreement.

C.    The capitalized terms used herein and not otherwise defined have the meanings given them in Article 7.

In consideration of the premises and the mutual covenants contained herein and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Company and the Purchasers (severally and not jointly) hereby agree as follows:

1.1    Closing.

(a)Purchase and Sale of Securities. At the closing of the transaction contemplated by this Agreement (the “Closing”), the Company will sell and issue to each Purchaser, and each Purchaser will, severally and not jointly, purchase from the Company, the number of Shares equal to, (x) the dollar amount set forth opposite such Purchaser’s name on Schedule 1 hereto under the heading “Subscription Amount” divided by (y) the Per Share Purchase Price, rounded down to the nearest whole share; provided, however, in the event the number of Shares resulting from the foregoing calculation would result in such Purchaser, together with its Attribution Parties, beneficially owning in excess of the Beneficial Ownership Limitation of the outstanding Common Stock immediately after the Closing, then (i) the number of Shares otherwise issuable to such Purchaser at the Closing will be reduced by the number (such number, the “Overage Number”) of Shares that would result in such Purchaser beneficially owning, together with its Attribution Parties, no more than the Beneficial Ownership Limitation of the outstanding Common Stock immediately after the Closing, (ii) if elected by the Purchaser, the Company will issue to such Purchaser at the Closing a Pre-Funded Warrant that is exercisable for a number of Warrant Shares that is equal to the Overage Number, (iii) the Subscription Amount payable by such Purchaser at the Closing pursuant to Section 1.1(b) below shall be reduced by $0.0001 for each Warrant Share subject to the Pre-Funded Warrant being purchased by such Purchaser and (iv) to the extent the Purchaser has elected not to purchase Pre-Funded Warrants, such Purchaser’s Subscription Amount shall equal the number of Shares such Purchaser purchases at Closing multiplied by the Per Share Purchase Price. The Pre-Funded

Warrants shall have an exercise price of $0.0001 per Warrant Share. The applicable Purchaser’s name, Beneficial Ownership Limitation, Shares to be acquired, Warrant Shares underlying the Pre-Funded Warrant, aggregate Subscription Amount and aggregate amount of funds to be payable pursuant to this Section 1.1(a) are set forth on Schedule 1, provided the Warrant Shares underlying the Pre-Funded Warrant shall be increased, if applicable, and the Shares reduced, as necessary, as a result of any purchase by such Purchaser (or its Attribution Parties) of shares of Common Stock (or securities exercisable or convertible into shares of Common Stock) following the execution of this Agreement and prior to the Closing (other than pursuant to this Agreement) to ensure that such Purchaser, together with its Attribution Parties, does not beneficially own in excess of the Beneficial Ownership Limitation of the outstanding shares of Common Stock immediately after the Closing. The number of Shares and Per Share Purchase Price set forth on Schedule 1 shall be equitably adjusted in the event of any reclassification, recapitalization, stock split, reverse stock split or combination, exchange or readjustment of shares, or any stock dividend effected by the Company between the date hereof and the Closing. Prior to the Closing, the Company shall deliver to the Transfer Agent irrevocable instructions to issue to such Purchaser or in such nominee name(s) as designated by such Purchaser in writing such number of Securities set forth opposite such Purchaser’s name on Schedule 1 hereto.

(b)Payment. At the Closing, each Purchaser will pay to an account designated by the Company, by wire transfer of immediately available funds, the amount set forth opposite its name on Schedule 1 hereto under the heading “Aggregate Purchase Price (Wire Amount)” (as such Schedule 1 may be amended as set forth in Section 1.1(a)). The Company will (i) instruct the Transfer Agent to credit each Purchaser the number of Shares purchased by the Purchaser pursuant to Section 1.1 hereof, (ii) if applicable, issue a certificate evidencing the Pre-Funded Warrants purchased by such Purchaser pursuant to Section 1.1 hereof and (iii) on the Closing Date (defined below) deliver written notice from the Company or account statements from the Transfer Agent evidencing the issuance to the Purchaser of the Shares and Pre-Funded Warrants on and as of the Closing Date, provided that, if requested by a Purchaser due to such Purchaser’s settlement requirements, the Company shall provide a book entry statement from the Transfer Agent reflecting the issuance of the Shares in the name of the Purchaser (or its nominee as directed by such Purchaser in its delivery instructions) on the Closing Date.

(c)Closing Date. The Closing will take place as soon as reasonably practicable on or after the date hereof as agreed between the Company and the Purchasers, but in no event later than September 1, 2023 (the date on which the Closing actually occurs, the “Closing Date”) and the Closing will be held remotely via the exchange of documents and signatures, or at such other time and place as agreed upon by the Company and the Purchasers subscribing for a majority of the Shares and Pre-Funded Warrants to be sold and issued hereunder, based on the amounts set forth on Schedule 1 hereto under the heading “Subscription Amount”.

Except as specifically contemplated by this Agreement, the Company hereby represents and warrants to the Purchasers as of the date of this Agreement and as of the Closing that:

2.1     Good Standing of the Company; Subsidiaries. The Company has been duly incorporated, is validly existing as a corporation in good standing under the laws of the jurisdiction of its incorporation, has the corporate power and authority to own its property and to conduct its business as described in the reports, schedules, forms, statements and other documents required to be filed by it with the SEC, pursuant to the reporting requirements of the

Exchange Act and the Securities Act (all of the foregoing filed prior to the date hereof and all exhibits included therein and financial statements and schedules thereto and documents (other than exhibits) incorporated by reference therein, the “SEC Documents”) and is duly qualified to transact business and is in good standing in each jurisdiction in which the conduct of its business or its ownership or leasing of property requires such qualification, except to the extent that the failure to be so qualified or be in good standing would not have a Material Adverse Effect. The Company does not have any “significant subsidiaries” (as defined in Regulation S-X) and does not otherwise own any shares of capital stock or any interest in any other Person. The Company does not control directly or indirectly or have any direct or indirect equity participation or similar interest in any corporation, partnership, limited liability company, joint venture, trust or other business association or entity.

2.2    Authorization of Share Capital. The authorized capital stock of the Company consists of 120,000,000 shares of Common Stock, $0.0001 par value per share and 15,000,000 shares of Preferred Stock, $0.0001 par value per share. All of the issued and outstanding shares of Common Stock have been duly authorized and are validly issued, fully paid and non-assessable and were not issued in violation of the preemptive or similar rights of any security holder of the Company. The issuance and sale of the Securities will not obligate the Company to issue shares of Common Stock or other securities to any Person (other than the Purchasers or their permitted assignees/transferees). There are no outstanding securities or instruments of the Company with any provision that adjusts the exercise, conversion, exchange or reset price of such security or instrument upon an issuance of securities by the Company. There are no outstanding securities or instruments of the Company that contain any redemption or similar provisions, and there are no contracts, commitments, understandings or arrangements by which the Company is or may become bound to redeem a security of the Company.

2.3    Authorization of Securities. The Shares have been duly authorized and, when issued and delivered in accordance with the terms of this Agreement, will be validly issued, fully paid and non-assessable, and will not be subject to any preemptive or similar rights of shareholders of the Company. The Pre-Funded Warrants have been duly authorized by the Company and, when executed and delivered by the Company, will be valid and binding agreements of the Company, enforceable against the Company in accordance with their terms, except as the enforcement thereof may be limited by bankruptcy, insolvency, reorganization, moratorium or other similar laws relating to or affecting the rights and remedies of creditors or by general equitable principles. The Warrant Shares have been duly authorized and validly reserved for issuance upon exercise of the Pre-Funded Warrants in a number sufficient to meet the exercise requirements. The Warrant Shares, when issued and delivered upon exercise of the Pre-Funded Warrants in accordance therewith, will be validly issued, fully paid and nonassessable, and the issuance of the Warrant Shares is not subject to any preemptive rights, rights of first refusal or other similar rights to subscribe for or purchase the Warrant Shares.

2.4    Private Placement. Neither the Company nor any of its Affiliates, nor any Person acting on its or their behalf, has, directly or indirectly, made any offers or sales of any security or solicited any offers to buy any security, or taken any other action under any circumstances that would require registration of the Shares, the Pre-Funded Warrants or the Warrants Shares (collectively, the “Securities”) under the Securities Act. Assuming the accuracy of the representations and warranties of the Purchasers contained in Article 3 hereof, the offer, sale and issuance of the Securities are exempt from registration under the Securities Act.

2.5    No Integrated Offering. Neither the Company nor its Affiliates nor any Person acting on their behalf has, directly or indirectly, made any offers or sales of any Company security or solicited any offers to buy any Company security, under circumstances that would adversely affect reliance by the Company on Section 4(a)(2) and Regulation D for the exemption

from registration for the transactions contemplated hereby or would require registration of the Securities under the 1933 Act.

2.6    No Directed Selling Efforts or General Solicitation. Neither the Company nor any Person acting on its behalf has conducted any general solicitation or general advertising (as those terms are used in Regulation D promulgated under the 1933 Act) in connection with the offer or sale of any of the Securities.

2.7    Authorization and Execution of Agreement; Binding Obligation. This Agreement has been duly authorized, executed and delivered by the Company. The Company has all requisite corporate power and authority to execute, deliver and perform its obligations under this Agreement. Upon the execution and delivery of this Agreement, this Agreement shall constitute a valid and binding obligation of the Company, enforceable in accordance with its terms, except as enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or similar laws affecting creditors’ and contracting parties’ rights generally and except as enforceability may be subject to general principles of equity and except as rights to indemnity and contribution may be limited by state or federal securities laws or public policy underlying such laws.

2.8    Absence of Defaults and Conflicts. Neither the Company nor any of its subsidiaries is (a) in violation of its certificate of incorporation or bylaws or similar organizational documents, as applicable, or (b) is in violation or default (or, with the giving of notice or lapse of time, would be in violation or default) (“Default”) under any indenture, loan, credit agreement, note, lease, license agreement, contract, franchise or other agreement or instrument (including, without limitation, any pledge agreement, security agreement, mortgage or other instrument or agreement evidencing, guaranteeing, securing or relating to indebtedness) to which the Company or any of its subsidiaries is a party or by which any of them may be bound, or to which any of their respective properties or assets are subject (each, an “Existing Instrument”), except in the case of this clause (b) for such Defaults as would not reasonably be expected, individually or in the aggregate, to have a Material Adverse Effect. The Company’s execution, delivery and performance of the Transaction Documents and consummation of the transactions contemplated hereby and thereby, including the issuance and sale of the Securities (i) have been duly authorized by all necessary corporate action, and will not result in any violation of the provisions of the articles of association or bylaws or similar organizational documents, as applicable, of the Company or any of its subsidiaries, (ii) will not conflict with or constitute a breach of, or Default or a Debt Repayment Triggering Event (as defined below) under, or result in the creation or imposition of any lien, charge or encumbrance upon any property or assets of the Company or any of its subsidiaries pursuant to, or require the consent of any other party to, any Existing Instrument, except as would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect, (iii) will not result in any violation of any law, administrative regulation or administrative or court decree applicable to the Company or any of its subsidiaries, except as would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect, and (iv) will not require a vote or approval of the stockholders of the Company. As used herein, a “Debt Repayment Triggering Event” means any event or condition which gives, or with the giving of notice or lapse of time would give, the holder of any note, debenture or other evidence of indebtedness (or any person acting on such holder’s behalf) the right to require the repurchase, redemption or repayment of all or a portion of such indebtedness by the Company or any of its subsidiaries.

2.9    Absence of Further Requirements. No filing with, or authorization, approval, consent, license, order, registration, exemption, qualification or decree of, any court or governmental authority or agency or any sub-division thereof is required for the performance by the Company of its obligations hereunder, in connection with the offering, issuance or sale of the Securities under this Agreement or the Pre-Funded Warrants (collectively, the “Transaction

Documents”), as applicable, or the consummation of the transactions contemplated by the Transaction Documents, except such as have been already obtained or as may be required under the Securities Act or the rules and regulations of the SEC thereunder, state securities or blue sky laws, the rules and regulations of the Financial Industry Regulatory Authority, Inc. or Nasdaq.

2.10    No Material Adverse Effect. Except as otherwise disclosed in the SEC Documents filed at least one Business Day prior to the date hereof, subsequent to the respective dates as of which information is given in the SEC Documents: (a) the Company and its subsidiaries (considered as one entity) has not sustained any material loss or material interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, (b) there has not been any change in the share capital or increase in short-term or long-term debt of the Company, other than a change in the number of outstanding shares of Common Stock due to the issuance of shares upon the exercise or settlement of outstanding options, warrants or restricted stock units as described in the SEC Documents, and (c) there has not occurred any Material Adverse Effect, or any development that would result, or would reasonably be expected to result, in a prospective Material Adverse Effect, in or affecting the condition, financial or otherwise, or in or affecting the revenues, business, assets, management, financial position, shareholders’ equity, operations, results of operations or prospects of the Company.

2.11    Absence of Proceedings. There is no action, suit, proceeding, inquiry or investigation brought by or before any governmental entity now pending or, to the knowledge of the Company, threatened, against or affecting the Company or any of its subsidiaries, which would be reasonably expected, individually or in the aggregate, to have a Material Adverse Effect or materially and adversely affect the consummation of the transactions contemplated by the Transaction Documents or the performance by the Company of its obligations hereunder and thereunder; and the aggregate of all pending legal or governmental proceedings to which the Company or any such subsidiary is a party or of which any of their respective properties or assets is the subject, including ordinary routine litigation incidental to their business, if determined adversely to the Company or such subsidiary, would not reasonably be expected to have a Material Adverse Effect. There are no outstanding governmental orders and no unsatisfied judgments, penalties or awards against or affecting the Company or any of its properties or assets, except for any that are not required to be disclosed in the SEC Documents. No labor dispute with the employees of the Company or any of its subsidiaries, or with the employees of any principal supplier, manufacturer, customer or contractor of the Company, exists or, to the knowledge of the Company, is threatened or imminent, which could reasonably be expected, individually or in the aggregate, to result in a Material Adverse Effect.

2.12    Investment Company Act of 1940. The Company is not, and after giving effect to the offering and sale of the Securities and the application of the proceeds thereof as described herein will not be, required to register as an “investment company” as such term is defined in the Investment Company Act of 1940, as amended.

2.13    Registration Rights. Except as described in the SEC Documents, there are no contracts, agreements or understandings between the Company and any person granting such person the right to require the Company to file a registration statement under the Securities Act with respect to any securities of the Company or to require the Company to include such securities with the Shares and Warrant Shares registered pursuant to a Registration Statement other than rights that have been validly waived.

2.14    Title to Real and Personal Property. The Company and its subsidiaries have good and marketable title to all of the real and personal property and other assets reflected as owned in the financial statements referred to in the consolidated financial statements of the Company included in the SEC Documents filed in calendar year 2023, in each case, except as

described in the SEC Documents, free and clear of any security interests, mortgages, liens, encumbrances, equities, adverse claims and other defects, except as do not materially interfere with the use made or proposed to be made of such property and other assets by the Company. The real property, improvements, equipment and personal property held under lease by the Company or any of its subsidiaries are held under valid and enforceable leases, with such exceptions as are not material and do not materially interfere with the use made or proposed to be made of such real property, improvements, equipment or personal property by the Company or such subsidiary.

2.15    Intellectual Property Rights. The Company and its subsidiaries own, or have obtained valid and enforceable licenses for, the inventions, patent applications, patents, trademarks, trade names, service names, copyrights, know how, trade secrets and other intellectual property (1) described in the SEC Documents as being owned or licensed by them or (2) which are necessary for the conduct of their respective businesses as currently conducted or as currently proposed in the SEC Documents to be conducted (collectively, “Intellectual Property”) except in the case of clause (2) where the failure to own, possess or acquire such rights would not reasonably be expected, individually or in the aggregate, to result in a material liability or the loss of a material benefit. Except as would not reasonably be expected, individually or in the aggregate, to result in a material liability or the loss of a material benefit, to the Company’s knowledge: (i) there are no third parties who have rights to any Intellectual Property; and (ii) there is no infringement by third parties of any Intellectual Property. To the Company’s knowledge, the conduct of the Company’s business as currently conducted and as proposed in the SEC Documents to be conducted does not and would not infringe, misappropriate or otherwise violate any third party’s Intellectual Property. Except as would not reasonably be expected, individually or in the aggregate, to result in a material liability or the loss of a material benefit, there is no pending or, to the Company’s knowledge, threatened action, suit, proceeding or claim by others: (A) challenging the Company’s or its subsidiaries’ rights in or to any Intellectual Property, and the Company is unaware of any facts which would form a reasonable basis for any such action, suit, proceeding or claim; (B) challenging the validity, enforceability or scope of any Intellectual Property, and the Company is unaware of any facts which would form a reasonable basis for any such action, suit, proceeding or claim; or (C) asserting that the Company or any of its subsidiaries infringes or otherwise violates, or would, upon the commercialization of any product or service described in the SEC Documents as under development, infringe or violate, any patent, trademark, trade name, service name, copyright, trade secret or other proprietary rights of others, and the Company is unaware of any facts which would form a reasonable basis for any such action, suit, proceeding or claim. Except as would not reasonably be expected, individually or in the aggregate, to result in a material liability or the loss of a material benefit, the Company and its subsidiaries have complied with the terms of each agreement pursuant to which Intellectual Property has been licensed to the Company or its subsidiaries, and all such agreements are in full force and effect. The product candidates described in the SEC Documents as under development by the Company or its subsidiary fall within the scope of the claims of one or more patents or patent applications owned by, or exclusively licensed to, the Company or any such subsidiary.

2.16    Insurance. Each of the Company and its subsidiaries are insured by recognized and reputable institutions with policies in such amounts and with such deductibles and covering such risks as the Company reasonably believes are generally deemed customary for their businesses including, but not limited to, policies covering real and personal property owned or leased by the Company and its subsidiaries against theft, damage, destruction, acts of vandalism and earthquakes and policies covering the Company and its subsidiaries for clinical trial liability claims. The Company has no reasonable basis to believe that it or any of its subsidiaries will not be able (i) to renew its existing insurance coverage as and when such policies expire or (ii) to obtain comparable coverage from similar institutions as may be necessary or appropriate to conduct its business as now conducted and at a cost that would not reasonably be expected to

have a Material Adverse Effect. Neither the Company nor any of its subsidiaries has been denied any material insurance coverage which it has sought or for which it has applied.

2.17    Licenses and Permits; Compliance with Laws.

(a)The Company and its subsidiaries possess such valid and current certificates, registrations, licenses, authorizations or permits required by local, state, federal or foreign, governmental authority, regulatory agencies or bodies to conduct their respective businesses as currently conducted and as described in the SEC Documents (“Permits”), except where the failure to so possess would not reasonably be expected to, individually or in the aggregate, result in a Material Adverse Effect. Neither the Company nor any of its subsidiaries is in violation of, or in default under, any of the Permits or, to the knowledge of the Company, has received any notice of proceedings relating to the termination, revocation or modification of, or non-compliance with, any Permit, except as would not reasonably be expected to have a Material Adverse Effect.

2.18    Accounting Controls. The Company has taken all actions reasonably necessary to ensure that, within the time period required by applicable law, the Company will have established and will maintain a system of internal control over financial reporting (as such term is defined in Rule 13a-15(f) under the Exchange Act) sufficient to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with United States generally accepted accounting principles (“U.S. GAAP”). Since the end of the Company’s most recent audited fiscal year, there has been (A) no material weakness in the Company’s internal control over financial reporting (whether or not remediated) and (B) no change in the Company’s internal control over financial reporting that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

2.19    Disclosure Controls. The Company maintains disclosure controls and procedures (as such term is defined in Rule 13a-15(e) under the Exchange Act) that comply with the applicable requirements of the Exchange Act; and such disclosure controls and procedures have been designed to ensure that (i) material information relating to the Company is made known to the Company’s principal executive officer and principal financial officer by others within the Company and (ii) information required to be disclosed by the Company in reports that it files, furnishes or submits under the Exchange Act is recorded, processed, summarized and reported within the timeframes specified in the SEC’s rules and forms, including controls and procedures designed to ensure that such information is accumulated and communicated the Company’s management as appropriate to allow timely decisions regarding required disclosure. The Company has carried out evaluations of the effectiveness of its disclosure controls and procedures as required by Rule 13a-15 of the Exchange Act.

2.20    Independent Accountants. BDO USA, LLP, who have certified the financial statements and supporting schedules of the Company that are included in the SEC Documents and which will be included as a part of the Registration Statement, is an independent registered public accounting firm with respect to the Company as required by the Securities Act and the rules and regulations of the SEC thereunder.

2.21    SEC Documents. The Company has timely filed the SEC Documents required to be filed by it with the SEC, under the Securities Act and the Exchange Act, for the twelve calendar months preceding the date hereof. As of their respective dates, the SEC Documents complied in all material respects with the requirements of the Exchange Act or the Securities Act, as the case may be, and the rules and regulations of the SEC promulgated thereunder applicable to the SEC Documents, and none of the SEC Documents, at the time they were filed with the SEC, contained any untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading. There are no material outstanding or unresolved comments in comment letters from the staff of the Division of Corporation Finance of the SEC with respect to any of the SEC Documents. The Company meets the requirements for use of Form S-3 under the Securities Act.

2.22    Financial Statements. (a) The financial statements included in the SEC Documents since the end of the Company’s most recent audited fiscal year, together with the related schedules and notes, present fairly, in all material respects, the financial position of the Company at the dates indicated and the statement of operations, shareholders’ equity and cash flows of the Company for the periods specified; said financial statements have been prepared in conformity with U.S. GAAP applied on a consistent basis throughout the periods involved except, in the case of unaudited interim financial statements, for normal year-end audit adjustments and the exclusion of footnotes. The summary financial information included in the SEC Documents since the end of the Company’s most recent audited fiscal year, if any, present fairly, in all material respects, the information shown therein and have been compiled on a basis consistent in all material respects with that of the audited financial statements included in the SEC Documents. (b) There are no off-balance sheet arrangements, outstanding guarantees or other contingent obligations of the Company that would reasonably be expected to have a Material Adverse Effect. There are no transactions, arrangements or other relationships between and/or among the Company, any of its affiliates (as such term is defined in Rule 405 of the Securities Act) and any unconsolidated entity, including, but not limited to, any structured finance, special purpose or limited purpose entity, that would reasonably be expected to materially affect the Company’s liquidity or the availability of or requirements for its capital resources required to be described in SEC Documents which have not been described as required. All disclosures contained in the SEC Documents regarding “non-GAAP financial measures” (as defined by the rules and regulations of the SEC) comply with Regulation G of the Exchange Act and Item 10 of Regulation S-K of the Securities Act, to the extent applicable. There are no financial statements (historical or pro forma) that are required to be included in the SEC Documents that are not so included as required. The interactive data in extensible Business Reporting Language included or incorporated by reference in the SEC Documents fairly present the information called for in all material respects and have been prepared in accordance with the SEC’s rules and guidelines applicable thereto. Except as would not, in the aggregate, reasonably be expected to have a Material Adverse Effect, since the date of the latest audited financial statements included in the SEC Documents, and, except as disclosed in a subsequent SEC Document filed at least one Business Day prior to the date hereof, the Company has not (i) sustained any loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, (ii) issued or granted any securities (other than pursuant to employee benefit plans, qualified stock option plans or other equity compensation plans or arrangements existing on the date hereof and disclosed in the SEC Documents), (iii) incurred any material liability or obligation, direct or contingent, other than liabilities and obligations that were incurred in the ordinary course of business, (iv) entered into any material transaction not in the ordinary course of business, or (v) declared or paid any dividend on its capital stock.

2.23    Tax Law Compliance. The Company and its subsidiaries have filed all material United States (federal, state and local), and foreign (state and local) income and franchise tax

returns or have properly requested extensions thereof and have paid all taxes required to be paid by any of them and, if due and payable, any related or similar assessment, fine or penalty levied against any of them except as may be being contested in good faith and by appropriate proceedings or except where the failure to pay such taxes could not reasonably be expected to result in a Material Adverse Effect. The Company has made adequate charges, accruals and reserves in the financial statements included in the SEC Documents since the end of the Company’s most recent audited fiscal year in respect of all federal, state, and foreign income and franchise taxes for all periods as to which the tax liability of the Company or any of its subsidiaries has not been finally determined.

2.24    Related Party Transactions. Other than the transactions contemplated by this Agreement, there are no business relationships or related-party transactions involving the Company or any of its subsidiaries or any other person required to be described in the SEC Documents that have not been described as required.

2.25    Commission Agreements. The Company is not a party to any contract, agreement or understanding with any person that would give rise to a valid claim against the Company for a brokerage commission, finder’s fee or like payment in connection with any transaction contemplated by this Agreement.

2.26    Foreign Corrupt Practices Act. Neither the Company nor any of its subsidiaries nor, to the knowledge of the Company, any director, officer, agent, employee, affiliate or other person acting on behalf of the Company or any of its subsidiaries has, in the course of its actions for, or on behalf of, the Company or any of its subsidiaries (i) used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expenses relating to political activity; (ii) made any direct or indirect unlawful payment to any domestic government official, “foreign official” (as defined in the U.S. Foreign Corrupt Practices Act of 1977, as amended, and the rules and regulations thereunder (collectively, the “FCPA”)) or employee from corporate funds; (iii) violated or is in violation of any provision of the FCPA or any applicable non-U.S. anti-bribery statute or regulation; or (iv) made any unlawful bribe, rebate, payoff, influence payment, kickback or other unlawful payment to any domestic government official, such foreign official or employee; and the Company and its subsidiaries and, to the knowledge of the Company, the Company’s affiliates have conducted their respective businesses in compliance with the FCPA and have instituted and maintain policies and procedures designed to ensure, and which are reasonably expected to continue to ensure, continued compliance therewith.

2.27    Money Laundering Laws. The operations of the Company and its subsidiaries are, and have been conducted at all times, in compliance with applicable financial recordkeeping and reporting requirements of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the money laundering statutes of all applicable jurisdictions, the rules and regulations thereunder and any related or similar applicable rules, regulations or guidelines, issued, administered or enforced by any governmental agency (collectively, the “Money Laundering Laws”) and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Company or any of its subsidiaries with respect to the Money Laundering Laws is pending or, to the knowledge of the Company, threatened.

2.28    OFAC. Neither the Company nor any of its subsidiaries nor, to the knowledge of the Company, after due inquiry, any director, officer, agent, employee, affiliate or other person acting on behalf of the Company or any of its subsidiaries is currently subject to any applicable sanctions administered by the Office of Foreign Assets Control of the U.S. Treasury Department (“OFAC”), the United Nations Security Council, the European Union, Her Majesty’s Treasury, or other relevant sanctions authority (collectively, “Sanctions”), nor is the Company located, organized or resident in a country or territory that is the subject of Sanctions (including, without limitations, Cuba, Iran, North Korea, and the Crimea, so-called Donetsk People’s Republic, and

so-called Luhansk People’s Republic regions of Ukraine); and the Company will not directly or indirectly use the proceeds of this offering, or lend, contribute or otherwise make available such proceeds to any subsidiary, or any joint venture partner or other person or entity, for the purpose of financing the activities of or business with any person, or in any country or territory, that currently is the subject of any Sanctions, or in any other manner that will result in a violation by any person (including any person participating in the transaction whether as underwriter, advisor, investor or otherwise) of such Sanctions.

2.29    Cybersecurity. The Company’s computer software, computer hardware, firmware, networks, interfaces and related systems (collectively, “Computer Systems”) are sufficient for the conduct of the Company’s business in all material respects as now conducted, and to the knowledge of the Company, there have been no material failures, crashes, security breaches or other adverse events affecting the Computer Systems which has caused material disruption to the business of the Company. The Company complies in all material respects with all privacy laws applicable to the Company.

2.30    Clinical Data and Regulatory Compliance. The preclinical studies and clinical trials being conducted or sponsored by the Company and its subsidiaries, and, to the knowledge of the Company, other studies (collectively, “studies”) that are described in, or the results of which are referred to in, the SEC Documents were and, if still pending, are being conducted, in all material respects, in accordance with the protocols, procedures and controls designed and approved for such studies and with standard medical and scientific research procedures; each description of the results of such studies is accurate and complete, in all material respects, and fairly presents the data derived from such studies, and the Company and its subsidiaries have no knowledge as of the date hereof of any other studies the results of which are inconsistent with, or otherwise call into question, the results described or referred to in the SEC Documents; the Company and its subsidiaries have made all such filings and obtained all such approvals as may be required for the conduct of the studies by the Food and Drug Administration of the U.S. Department of Health and Human Services or any committee thereof or from any other U.S. or foreign government or drug or medical device regulatory agency, or health care facility Institutional Review Board (collectively, the “Regulatory Agencies”), except where the failure to make such filing or obtain such approval would not reasonably be expected, individually or in the aggregate, to result in a Material Adverse Effect; neither the Company nor any of its subsidiaries has received any notice of, or correspondence from, any Regulatory Agency requiring, and, to the knowledge of the Company, no Regulatory Agency has threatened to initiate, the termination, suspension or modification of any clinical trials that are described or referred to in the SEC Documents; and the Company and its subsidiaries have each operated and currently are in compliance, in all material respects, with all applicable laws, rules, regulations and policies of the Regulatory Agencies.

2.31    FDA. As to each product subject to the jurisdiction of the FDA under the Federal Food, Drug and Cosmetic Act, as amended, and the regulations thereunder (“FDCA”) and any other applicable Regulatory Agency that is manufactured, packaged, labeled, tested, distributed, sold, and/or marketed by or on behalf of the Company or its subsidiaries (each such product, a “Pharmaceutical Product”), such Pharmaceutical Product is being manufactured, packaged, labeled, tested, distributed, sold and/or marketed by the Company or its subsidiaries in compliance with all applicable requirements under the FDCA and similar laws, rules and regulations of any applicable Regulatory Agency relating to the registration, investigational use, premarket clearance, licensure, or application approval, good manufacturing practices, good laboratory practices, good clinical practices, product listing, quotas, labeling, advertising, record keeping and filing of reports, except where the failure to be in compliance would not have a Material Adverse Effect. There is no pending, completed or, to the Company’s knowledge, threatened, action (including any lawsuit, arbitration, or legal or administrative or regulatory proceeding, charge, complaint, or investigation) against the Company or its subsidiaries, and the

Company and its subsidiaries have not received any notice, warning letter or other communication from the FDA or any other governmental entity, which (i) contests the premarket clearance, licensure, registration, or approval of, the uses of, the distribution of, the manufacturing or packaging of, the testing of, the sale of, or the labeling and promotion of any Pharmaceutical Product, (ii) withdraws its approval of, requests the recall, suspension, or seizure of, or withdraws or orders the withdrawal of advertising or sales promotional materials relating to, any Pharmaceutical Product, (iii) imposes a clinical hold on any clinical investigation by the Company, (iv) enjoins production at any facility of the Company or its subsidiaries or any third party involving a Pharmaceutical Product, (v) enters or proposes to enter into a consent decree of permanent injunction with the Company or its subsidiaries, or (vi) otherwise alleges any violation of any laws, rules or regulations by the Company or its subsidiaries, and which, either individually or in the aggregate, would have a Material Adverse Effect. The properties, business and operations of the Company and its subsidiaries have been and are being conducted in all material respects in accordance with all applicable laws, rules and regulations of the FDA and other Regulatory Agencies. The Company has not been informed by the FDA or other Regulatory Agency that the FDA or such other Regulatory Agency will prohibit the marketing, sale, license or use in the United States of any Pharmaceutical Product. Neither the Company, any of its subsidiaries, nor any of their respective officers, directors, or employees or, to the knowledge of the Company, any of their respective agents or contract manufacturers with respect to any Pharmaceutical Product, has been debarred or excluded or convicted of any crime that could result in a debarment or exclusion under (i) 21 U.S.C. Section 335a or (ii) any similar applicable laws, rules, regulations and policies of an applicable Regulatory Agency. No debarment or exclusionary claims, actions, proceedings or investigations in respect of their business or Pharmaceutical Product are pending or, to the knowledge of the Company, threatened against the Company, any its subsidiaries, nor any of their respective officers, directors, employees, or, to the knowledge of the Company, any agents or contract manufacturers with respect to any Pharmaceutical Product.

2.32    Legality. The legality, validity, enforceability or admissibility into evidence of this Agreement or the Securities in any jurisdiction in which the Company is organized or does business is not dependent upon such document being submitted into, filed or recorded with any court or other authority in any such jurisdiction on or before the date hereof or that any tax, imposition or charge be paid in any such jurisdiction on or in respect of any such document.

2.34    Use of Proceeds. The Company will use the net proceeds of the sale of the Shares and Pre-Funded Warrants for clinical development activities for its product candidates, and for working capital and other general corporate purposes.

2.35    Acknowledgment Regarding Purchasers’ Purchase of Shares and Pre-Funded Warrants. The Company acknowledges and agrees that each of the Purchasers is acting solely in the capacity of an arm’s length purchaser with respect to this Agreement and the transactions contemplated hereby. The Company further acknowledges that no Purchaser is acting as a financial advisor or fiduciary of the Company (or in any similar capacity with respect to the Company) with respect to this Agreement and the transactions contemplated hereby and any advice given by any Purchaser or any of their respective representatives or agents to the Company in connection with this Agreement and the transactions contemplated hereby is merely incidental to such Purchaser’s purchase of the Shares and Pre-Funded Warrants. The Company further represents to each Purchaser that the Company’s decision to enter into this Agreement has been based on the independent evaluation of the transactions contemplated hereby by the Company and its representatives.

2.36    Reserved.

2.37    No Price Stabilization or Manipulation of Shares; Compliance with Regulation M. The Company has not taken, directly or indirectly, any action designed to or that would be reasonably expected to cause or result in stabilization or manipulation of the price of the Common Stock or any security of the Company whether to facilitate the sale or resale of any of the Securities or otherwise, and has taken no action which would directly or indirectly violate Regulation M under the Exchange Act.

2.38    Never a Shell Company. The Company has never been an issuer subject to Rule 144(i) under the Securities Act.

2.39    Listing and Maintenance Requirements. The Common Stock is registered pursuant to Section 12(b) or 12(g) of the Exchange Act, and the Company has taken no action designed to, or which to its knowledge is likely to have the effect of, terminating the registration of the Common Stock under the Exchange Act nor has the Company received any notification that the SEC is contemplating terminating such registration. The Common Stock is currently eligible for electronic transfer through the Depository Trust Company or another established clearing corporation and the Company is current in payment of the fees to the Depository Trust Company (or such other established clearing corporation) in connection with such electronic transfer.

2.40    No Additional Agreements. The Company has no other agreements or understandings (including, without limitation, side letters) with any Purchaser to purchase any of the Securities on terms more favorable to such Purchaser than as set forth herein.

2.41    The Nasdaq Global Market. The Common Stock is listed on The Nasdaq Global Market, and to the Company’s knowledge, there are no proceedings to revoke or suspend such listing. Except as disclosed in the SEC Documents, the Company is in material compliance with the requirements of Nasdaq for continued listing of the Common Stock thereon and any other Nasdaq listing and maintenance requirements.

2.42    Application of Takeover Protections. The Company and the Board of Directors have taken all necessary action, if any, in order to render inapplicable any control share acquisition, business combination, poison pill (including any distribution under a rights agreement) or other similar anti-takeover provision under the Company’s certificate of incorporation (or similar charter documents) or the laws of its state of incorporation that is or would become applicable to the Purchasers as a result of the Purchasers and the Company fulfilling their obligations or exercising their rights under this Agreement, including without limitation as a result of the Company’s issuance of the Securities and the Purchasers’ ownership of the Securities and including pursuant to Section 203 of the General Corporation Law of the State of Delaware.

2.43    Acknowledgment Regarding Purchaser’s Trading Activity. Anything in this Purchase Agreement or elsewhere herein to the contrary notwithstanding, it is understood and acknowledged by the Company that (i) none of the Purchasers has been asked by the Company to agree, nor has any Purchaser agreed, to desist from purchasing or selling, long and/or short, securities of the Company, or “derivative” securities based on securities issued by the Company or to hold the Securities for any specified term, (ii) past or future open market or other transactions by any Purchaser, specifically including, without limitation, short sales or “derivative” transactions, before or after the closing of this or future private placement transactions, may negatively impact the market price of the Company’s publicly-traded securities, (iii) any Purchaser, and counter-parties in “derivative” transactions to which any such Purchaser is a party, directly or indirectly, presently may have a “short” position in the Common Stock, and (iv) each Purchaser shall not be deemed to have any affiliation with or control over any arm’s length counter-party in any “derivative” transaction. The Company further

understands and acknowledges that (y) one or more Purchasers may engage in hedging activities at various times during the period that the Securities are outstanding, and (z) such hedging activities (if any) would reduce the value of the Purchasers’ equity interests in the Company at and after the time that the hedging activities are being conducted. The Company acknowledges that such aforementioned hedging activities do not constitute a breach of this Agreement.

2.44    Shareholder Rights Plan. No claim will be made or enforced by the Company or, with the consent of the Company, any other Person, that any Purchaser is an “Acquiring Person” under any control share acquisition, business combination, poison pill (including any distribution under a rights agreement) or similar anti-takeover plan or arrangement in effect or hereafter adopted by the Company, or that any Purchaser would be deemed to trigger the provisions of any such plan or arrangement, by virtue of receiving Shares under this Purchase Agreement or under any other agreement between the Company and the Purchasers.

2.45    Equal Treatment of Purchasers. No consideration (including any modification of this Purchase Agreement) shall be offered or paid to any Person to amend or consent to a waiver or modification of any provision of this Agreement unless the same consideration is also offered to all of the parties to this Agreement. For clarification purposes, this provision constitutes a separate right granted to each Purchaser by the Company and negotiated separately by each Purchaser, and is intended for the Company to treat the Purchasers as a class and shall not in any way be construed as the Purchasers acting in concert or as a group with respect to the purchase, disposition or voting of Securities or otherwise.

2.46    No Disqualification Events. With respect to the Securities to be offered and sold hereunder in reliance on Rule 506 under the Securities Act, none of the Company, any of its predecessors, any affiliated issuer, any director, executive officer, other officer of the Company participating in the offering hereunder, any beneficial owner of 20% or more of the Company’s outstanding voting equity securities, calculated on the basis of voting power, nor any promoter (as that term is defined in Rule 405 under the Securities Act) connected with the Company in any capacity at the time of sale (each, an “Issuer Covered Person”) is subject to any of the “Bad Actor” disqualifications described in Rule 506(d)(1)(i) to (viii) under the Securities Act (a “Disqualification Event”), except for a Disqualification Event covered by Rule 506(d)(2) or (d)(3). The Company has exercised reasonable care to determine whether any Issuer Covered Person is subject to a Disqualification Event. The Company has complied, to the extent applicable, with its disclosure obligations under Rule 506(e), and has furnished to the Purchasers a copy of any disclosures provided thereunder.

Each Purchaser represents and warrants to the Company, severally and not jointly, with respect to itself and its purchase hereunder, that as of the Closing (or, in the case of Section 3.1, as of the date of this Agreement):

3.1    Investment Purpose. The Purchaser is purchasing the Securities for its own account and not with a present view toward the public sale or distribution thereof and has no intention of selling or distributing any of such Securities or any arrangement or understanding with any other Persons regarding the sale or distribution of such Securities except in accordance with the provisions of Article 6 with respect to any sale or distribution pursuant to an effective Registration Statement and except as would not result in a violation of the Securities Act. The Purchaser will not, directly or indirectly, offer, sell, pledge, transfer or otherwise dispose of (or solicit any offers to buy, purchase or otherwise acquire or take a pledge of) any of the Securities except in accordance with the provisions of Article 6 with respect to any sale or distribution

pursuant to an effective Registration Statement or pursuant to and in accordance with the Securities Act.

3.2    Information. The Purchaser has been furnished with all relevant materials relating to the business, finances and operations of the Company necessary to make an investment decision, and materials relating to the offer and sale of the Securities, that have been requested by the Purchaser, including, without limitation, the SEC Documents, and the Purchaser has had the opportunity to review the SEC Documents. The Purchaser has been afforded the opportunity to ask questions of the Company. Neither such inquiries nor any other investigation conducted by or on behalf of such Purchaser or its representatives or counsel shall modify, amend or affect such Purchaser’s right to rely on the truth, accuracy and completeness of the SEC Documents and the Company’s representations and warranties contained in the Agreement.

3.3    Acknowledgement of Risk.

3.4    Governmental Review. The Purchaser understands that no United States federal or state agency or any other government or governmental agency has passed upon or made any recommendation or endorsement of the Securities or an investment therein.

3.5    Transfer or Resale. The Purchaser understands that:

3.6    Legends.

The Purchaser understands the book entries representing the Securities will bear a restrictive legend in substantially the following form, in addition to any other legend required by applicable state securities laws or as may be appropriate to legend any restrictions on transfer set forth in this Agreement (and a stop-transfer order may be placed against transfer of the book entries for such Securities):

THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR THE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES. THE SECURITIES MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED, HYPOTHECATED, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER APPLICABLE SECURITIES LAWS, OR UNLESS OFFERED, SOLD, PLEDGED, HYPOTHECATED OR TRANSFERRED PURSUANT TO AN AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THOSE LAWS. THE COMPANY SHALL BE ENTITLED TO REQUIRE AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED TO THE EXTENT THAT SUCH OPINION IS REQUIRED PURSUANT TO THAT CERTAIN SECURITIES PURCHASE AGREEMENT UNDER WHICH THE SECURITIES WERE ISSUED.

3.7    Authorization; Enforcement. The Purchaser has the requisite power and authority to enter into this Agreement and to consummate the transactions contemplated hereby. The Purchaser has taken all necessary action to authorize the execution, delivery and performance of this Agreement. Upon the execution and delivery of this Agreement, and assuming due authorization, execution and delivery by the Company, this Agreement shall constitute a valid and binding obligation of the Purchaser enforceable in accordance with its terms, except as enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or similar laws affecting creditors’ and contracting parties’ rights generally and except as enforceability may be subject to general principles of equity and except as rights to indemnity and contribution may be limited by state or federal securities laws or public policy underlying such laws.

3.8    Residency. Unless the Purchaser has otherwise notified the Company in writing, the Purchaser is a resident of the jurisdiction set forth immediately below such Purchaser’s name on the signature pages hereto.

3.9    Short Sales and Confidentiality Prior to the Date Hereof. Other than consummating the transactions contemplated hereunder, such Purchaser has not, nor has any Person acting on behalf of or pursuant to any understanding with such Purchaser, directly or indirectly executed any purchases or sales, including all “short sales” as defined in Rule 200 of Regulation SHO under the Exchange Act (“Short Sales”), of the securities of the Company

during the period commencing as of the time that such Purchaser was first contacted by the Company or any other Person regarding the transactions contemplated hereby and ending immediately prior to the date hereof. Notwithstanding the foregoing, (i) in the case of a Purchaser that is a multi-managed investment vehicle whereby separate portfolio managers manage separate portions of such Purchaser’s assets and the portfolio managers have no direct knowledge of the investment decisions made by the portfolio managers managing other portions of such Purchaser’s assets, the representation set forth above shall only apply with respect to the portion of assets managed by the portfolio manager that made the investment decision to purchase the Securities covered by this Agreement and (ii) in the case of an Purchaser that is affiliated with other funds or investment vehicles or whose investment advisor or sub-advisor that routinely acts on behalf of or pursuant to an understanding with such Purchaser is also an investment advisor or sub-advisor to other funds or investment vehicles, the representation set forth above shall only apply with respect to the personnel of such other funds or investment vehicles or such investment advisor or sub-advisor who had knowledge of the transaction contemplated hereby and not with respect to any personnel who have been effectively walled off by appropriate information barriers. Other than to other Persons party to this Agreement and other than to such Person’s affiliate or outside attorney, accountant, auditor or investment advisor only to the extent necessary to permit evaluation of the investment, and the performance of the necessary or required tax, accounting, financial, legal, regulatory or administrative tasks and services and other than as may be required by law or regulation, such Purchaser has maintained the confidentiality of all disclosures made to it in connection with this transaction (including the existence and terms of this transaction). Notwithstanding the foregoing, for the avoidance of doubt, nothing contained herein shall constitute a representation or warranty, or preclude or prohibit any actions, with respect to the identification of, the availability of, or securing of, available shares to borrow in order to effect Short Sales or similar transactions in the future.

3.10    Accredited Investor Status. Such Purchaser is an “accredited investor” as that term is defined in Rule 501(a) of Regulation D.

3.11    Bad Actor Status. If the Purchaser is a person listed in the first paragraph of Rule 506(d)(1) with respect to the Company as an “issuer” for purposes of Rule 506 promulgated under the Securities Act, such Purchaser represents that such Purchaser is not a person of the type described in Section 506(d) of Regulation D under the Securities Act that would disqualify the Company from engaging in a transaction pursuant to Section 506 of Regulation D under the Securities Act.

3.12    Reserved.

3.13    Beneficial Ownership. Each Purchaser represents that, to its knowledge, the purchase by such Purchaser of the Securities, as listed on Schedule 1 hereto, will not result in such Purchaser (individually or together with any other person with whom such Purchaser has identified, or will have identified, itself as part of a “group” in a public filing made with the SEC involving the Company’s securities) acquiring, or obtaining the right to acquire, beneficial ownership in excess of 19.999% of the outstanding shares of Common Stock or the voting power of the Company on a post-transaction basis that assumes that the Closing shall have occurred with respect to all Purchasers (including assuming the effectiveness of any “blocker” or similar limitations on beneficial ownership contained in the applicable documentation for the Securities). Each Purchaser does not presently intend to, alone or together with others, make a public filing with the SEC to disclose that it has (or that it together with such other persons have) acquired, or obtained the right to acquire, as a result of the Closing (when added to any other securities of the Company that it or they then own or have the right to acquire), beneficial ownership in excess of 19.999% of the outstanding shares of Common Stock or the voting power of the Company on a post-transaction basis that assumes that the Closing shall have occurred (including assuming the

effectiveness of any “blocker” or similar limitations on beneficial ownership contained in the applicable documentation for the Securities).

4.1    Reporting Status. The shares of Common Stock are registered under Section 12 of the Exchange Act. During the Registration Period, the Company will timely file all documents with the SEC, and the Company will not terminate its status as an issuer required to file reports under the Exchange Act even if the Exchange Act or the rules and regulations thereunder would permit such termination.

4.2    Expenses. Except as otherwise expressly set forth herein, the Company and each Purchaser shall be liable for, and will pay, its own expenses incurred in connection with the negotiation, preparation, execution and delivery of the Transaction Documents. If the Closing is effected, the Company shall, at the Closing, reimburse the reasonable, documented fees and out-of-pocket expenses, including reasonable, documented outside counsel fees, of RA Capital Healthcare Fund, L.P., not to exceed $130,000.

4.3    Financial Information. The financial statements of the Company to be included in any documents filed with the SEC have been or will be prepared in accordance with U.S. GAAP, consistently applied (except (i) as may be otherwise indicated in such financial statements or the notes thereto, or (ii) in the case of unaudited interim statements, to the extent they may not include footnotes, may be condensed or summary statements or may conform to the SEC’s rules and instructions for Quarterly Reports on Form 10-Q), and fairly present or will fairly present in all material respects the financial position of the Company and results of its operations and cash flows as of, and for the periods covered by, such financial statements (subject, in the case of unaudited statements, to normal and recurring year-end audit adjustments).

4.4    Securities Laws Disclosure; Publicity. On or before the Disclosure Time, the Company shall file a Current Report on Form 8-K with the SEC describing the terms of the transactions contemplated by the Transaction Documents and including as exhibits to such Current Report on Form 8-K the Transaction Documents, in the forms required by the Exchange Act. From and after the Disclosure Time, the Company represents to the Purchasers that it shall have publicly disclosed the material terms and conditions of the transactions contemplated by the Transaction Documents.

4.5    Non-Public Information. The Company covenants and agrees that neither it, nor any other Person acting on its behalf will provide any Purchaser or its agents or counsel with any information following the date of this Agreement that constitutes, or the Company reasonably believes constitutes, material non-public information, unless prior thereto such Purchaser has consented in writing to the receipt of such information and agreed in writing with the Company to keep such information confidential. The Company understands and confirms that each Purchaser shall be relying on the foregoing covenant in effecting transactions in securities of the Company, provided that the Purchaser shall remain subject to applicable law. From and after the date and time upon which the Company’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2023 is publicly available via EDGAR, with such filing to occur no later than November 14, 2023, no Purchaser shall be in possession of any material, non-public information received from the Company or any of its officers, directors, employees, agents or any other person acting at the direction of the Company, and each Purchaser shall no longer be subject to any confidentiality or similar obligations under any current agreement, whether written

or oral, with the Company, any Person acting on the Company’s behalf or any of their respective affiliates, relating to the transactions contemplated by this Agreement.

4.6    Blue Sky. The Company shall, on or before the Closing Date, take such action as the Company shall reasonably determine is necessary in order to obtain an exemption for, or to qualify the Securities for, sale to the Purchasers at the Closing occurring on the Closing Date pursuant to this Agreement under applicable securities or “Blue Sky” laws of the states of the United States, and shall provide promptly upon the request of any Purchasers evidence of any such action so taken.

4.7    Reservation of Common Stock. The Company shall reserve and keep available at all times during which Pre-Funded Warrants remain exercisable, free of preemptive rights, a sufficient number of shares of Common Stock for the purpose of enabling the Company to issue the Warrant Shares.

4.8    Listing of Common Stock. The Company hereby agrees to use best efforts to maintain the listing of the Common Stock on Nasdaq, and in advance of the Closing, the Company shall apply to list all of the Shares and Warrant Shares on Nasdaq and promptly secure the listing of all of the Shares and Warrant Shares on Nasdaq. The Company further agrees, if the Company applies to have the shares of Common Stock on any other Trading Market, it will then include in such application all of the Shares and Warrant Shares, and will take such other action as is necessary to cause all of the Shares and Warrant Shares to be listed or quoted on such other Trading Market as promptly as possible. The Company will then take all action reasonably necessary to continue the listing and trading of its shares of Common Stock on such Trading Market and will comply in all respects with the Company’s reporting, filing and other obligations under the bylaws or rules of such Trading Market. The Company agrees to maintain the eligibility of the shares of Common Stock for electronic transfer through the Depository Trust Company or another established clearing corporation, including, without limitation, by timely payment of fees to the Depository Trust Company or such other established clearing corporation in connection with such electronic transfer. Nothing in this Section 4.8 shall be construed so as to limit the Company’s ability to engage in a strategic or financial material transaction approved by the Board of Directors, the result of which is that the Company is taken private or acquired by another company and its shares are no longer listed on any Trading Market.

4.9    Non-Disclosure. The Company shall not (and shall cause its officers, directors, employees and agents not to) publicly disclose the name of any Purchaser or any affiliate or investment adviser of any Purchaser, or include the name of such Purchaser or any affiliate or investment adviser of Purchaser without the prior written consent (including by e-mail) of such Purchaser (i) in any press release or marketing materials, or (ii) in any filing with the SEC or any regulatory agency or trading market, except with respect to clause (ii) (A) as required by the federal securities laws, rules or regulations, or (B) to the extent such disclosure is required by other laws, rules or regulations, at the request of the staff of the SEC or regulatory agency or under regulations of any national securities exchange on which the Company’s securities are listed for trading, in which case the Company shall provide such Purchaser with prompt prior notice of such requirement to the Purchaser and consult with the Purchaser on content and timing prior to any such disclosure.

4.10    Legend Removal. To the extent the resale of any issued Shares or Warrant Shares is registered under the Securities Act pursuant to an effective Registration Statement, the Company agrees to promptly (i) authorize the removal of the legend set forth in Section 3.6 and any other legend not required by applicable law from such Shares or Warrant Shares, (ii) cause the Transfer Agent to issue such Shares or Warrant Shares without such legends to the holders thereof by electronic delivery at the applicable balance account at the Depository Trust Company upon surrender of any share certificates evidencing such Shares or Warrant Shares and (iii) if

required by the Transfer Agent, cause its counsel to issue a legal opinion to effect the removal of any restrictive legends and provide all other opinions as may be reasonably required by the transfer agent in connection with the removal of legends (all such opinions “TA Legal Opinions”). The Company’s obligation to remove legends under this Section 4.10 may be conditioned upon the Purchaser providing a customary representation letter.

The Purchaser may request that the Company remove, and the Company agrees to authorize, including through the issuance of TA Legal Opinions by the Company’s counsel, the removal of any legend from any Shares or Warrant Shares issued to such Purchaser (i) within two Trading Days following any sale, or certification by a Purchaser of the expected sale, of such Shares or Warrant Shares pursuant to Rule 144, (ii) if such Shares or Warrant Shares are eligible for sale under Rule 144 following the expiration of the holding requirement under subparagraphs (b)(1)(i) and (d) thereof and the Purchaser is not an affiliate of the Company, in each case following receipt from the Purchaser of an appropriate certification to such effect or (iii) following the time that the Registration Statement is declared effective and while it remains effective. Following the time a legend is no longer required for the Shares or Warrant Shares under this Section 4.10, the Company will, no later than two Trading Days following the delivery by a Purchaser to the Company or the Transfer Agent of a legended certificate representing such securities (if any) (or a request for legend removal, in the case of the Shares or Warrant Shares issued in book-entry form) and appropriate certifications that the applicable requirements have been satisfied (the “Securities Delivery Date”), deliver or cause to be delivered to such Purchaser evidence of book entry positions representing such securities that is free from all restrictive and other legends or, in the case of Shares or Warrant Shares, if requested by Purchaser, by crediting such Shares or Warrant Shares to the account of the Purchaser or its prime broker or other designee with The Depository Trust Company through its Deposit or Withdrawal at Custodian system (“DWAC”) if the Company is then a participant in such system (“DWAC Delivery”); if the Company fails for any reason to deliver Shares or Warrant Shares via DWAC Delivery (if the Company is then a participant in DWAC) to a Purchaser as required by this Section 4.10 (other than a failure caused by incorrect or incomplete information provided by Purchaser to the Company), and if after such Securities Delivery Date such Purchaser is required to or otherwise purchases (in an open market transaction or otherwise), shares of Common Stock to deliver in satisfaction of a sale by such Purchaser of the Shares or Warrant Shares which such Purchaser was entitled to receive relating to such Securities Delivery Date (a “Buy-In”), then the Company shall pay in cash to such Purchaser (in addition to any other remedies available to or elected by such Purchaser) the amount by which (x) such Purchaser’s total purchase price (including any brokerage commissions) for the shares of Common Stock so purchased exceeds (y) the product of (1) the lesser of the (a) the number of shares of Common Stock so purchased and (b) the aggregate number of Shares or Warrant Shares that such Purchaser was entitled to receive for the Securities Delivery Date multiplied by (2) the actual sale price at which the sell order giving rise to such purchase obligation was executed (including any brokerage commissions). For example, if a Purchaser purchases shares of Common Stock having a total purchase price of $11,000 to cover a Buy-In with respect to Shares or Warrant Shares that were not delivered via DWAC Delivery by the Securities Delivery Date with respect to which the actual sale price (including any brokerage commissions) giving rise to such purchase obligation was a total of $10,000, the Company shall be required to pay such Purchaser $1,000. The Purchaser shall provide the Company written notice, within three (3) Business Days after the occurrence of a Buy-In, indicating the amounts payable to such Purchaser in respect of such Buy-In together with applicable confirmations and other evidence reasonably requested by the Company. Nothing herein shall limit a Purchaser’s right to pursue any other remedies available to it hereunder, at law or in equity including, without limitation, a decree of specific performance and/or injunctive relief with respect to the Company’s failure to timely deliver the Shares or Warrant Shares via DWAC Delivery as required pursuant to the terms hereof.

4.11    Conditions. The Company shall use its reasonable best efforts to cause the conditions set forth in Section 5.2 to become satisfied as promptly as reasonably practicable following the execution and delivery of this Agreement.

5.1    Conditions to Obligations of the Company. The Company’s obligation to complete the purchase and sale of the Shares and Pre-Funded Warrants to each Purchaser at the Closing is subject to the waiver by the Company or fulfillment as of the Closing Date of the following conditions:

(b)Representations and Warranties. The representations and warranties made by such Purchaser in Article 3 shall be true and correct in all material respects as of the Closing Date.

(c)Covenants. All covenants, agreements and conditions contained in this Agreement to be performed by such Purchaser on or prior to the Closing Date shall have been performed or complied with in all material respects.

(d)Blue Sky. The Company shall have obtained all necessary blue sky law permits and qualifications, or secured exemptions therefrom, required by any state for the offer and sale of the Securities.

(e)Nasdaq Qualification. The Shares and the Warrant Shares shall be duly authorized for listing by Nasdaq, subject to official notice of issuance, to the extent required by the rules of Nasdaq.

(f)Absence of Litigation. No writ, order, stay, stipulation, determination, judgment or injunction (preliminary or permanent), award or decree of or by any court, or judge, justice or magistrate, including any bankruptcy court or judge, or any order, executive order, decree, statute, rule or regulation of or by any governmental authority, shall have been issued, and no action or proceeding shall have been instituted by any governmental authority against the Company or such Purchaser, enjoining, preventing, or restraining, or seeking to enjoin, prevent or restrain, or which has effect of making the consummation of the transactions contemplated hereby illegal or otherwise prohibiting any of the transactions contemplated hereby and no action or proceeding seeking to impose such injunction, prohibition or restrain shall have been instituted or be pending before any court, arbitrator, governmental body, agency or official.

(g)No Governmental Prohibition. The sale of the Shares and Pre-Funded Warrants by the Company shall not be prohibited by any law or governmental order or regulation.

5.2    Conditions to Purchasers’ Obligations. Each Purchaser’s obligation to complete the purchase and sale of the Shares and Pre-Funded Warrants is subject to the waiver by such Purchaser or fulfillment as of the Closing Date of the following conditions:

(a)Representations and Warranties. The representations and warranties made by the Company in Article 2 shall be true and correct in all respects when made and as of the Closing Date.

(b)Covenants. All covenants, agreements and conditions contained in this Agreement to be performed by the Company on or prior to the Closing Date shall have been performed or complied with in all material respects.

(c)Blue Sky. The Company shall have obtained all necessary blue sky law permits and qualifications, or secured exemptions therefrom, required by any state or foreign or other jurisdiction for the offer and sale of the Securities.

(d)Nasdaq Qualification. The Shares and the Warrant Shares shall be duly authorized for listing by Nasdaq, subject to official notice of issuance, to the extent required by the rules of Nasdaq.

(e)No Governmental Prohibition. The sale of the Shares and Pre-Funded Warrants by the Company shall not be prohibited by any law or governmental order or regulation.

(f)No Material Adverse Effect. There shall not have occurred any Material Adverse Effect, or any development that could reasonably be expected to result in a Material Adverse Effect, as of the Closing.

(g)Transfer Agent Instructions. The Company shall have delivered to the Transfer Agent irrevocable instructions to issue to such Purchaser or in such nominee name(s) as designated by such Purchaser in writing such number of Securities set forth opposite such Purchaser’s name on Schedule 1 hereto.

(h)Absence of Litigation. No writ, order, stay, stipulation, determination, judgment or injunction (preliminary or permanent), award or decree of or by any court, or judge, justice or magistrate, including any bankruptcy court or judge, or any order, executive order, decree, statute, rule or regulation of or by any governmental authority, shall have been issued, and no action or proceeding shall have been instituted by any governmental authority against the Company or such Purchaser, enjoining, preventing, or restraining, or seeking to enjoin, prevent or restrain, or which has effect of making the consummation of the transactions contemplated hereby illegal or otherwise prohibiting any of the transactions contemplated hereby, and no action or proceeding seeking to impose such injunction, prohibition or restrain shall have been instituted or be pending before any court, arbitrator, governmental body, agency or official.

(i)Authorizations and Consents. The Company shall have obtained any and all authorizations, consents, permits, approvals, registrations and waivers necessary for the consummation of the purchase and sale of the Securities and the consummation of the other transactions contemplated by this Agreement, all of which shall be in full force and effect.

(j)No Stop Orders. No stop order shall have been imposed by Nasdaq, the SEC or any other governmental or regulatory body with respect to public trading in the Common Stock.

(k)No Other Agreements. The Company shall not have entered into any securities purchase agreement, subscription agreement, side letter or similar agreement or understanding with any other Purchaser or other person in connection with the transactions contemplated herein, and no Purchaser shall have received terms in respect of its purchase of any of the Securities that are more favorable than those of any other Purchaser.

(l)Legal Opinion. The Company shall have caused its counsel to issue legal opinions to the Purchasers in form and substance reasonably acceptable to each Purchaser.

(m)Compliance Certificate. The Chief Executive Officer of the Company shall have delivered to each Purchaser dated as of the Closing Date a certificate in form and substance reasonably acceptable to each Purchaser certifying that the conditions specified in Section 5.2 have been fulfilled.

(n)Secretary’s Certificate. The Secretary of the Company shall have delivered to each Purchaser at the Closing Date in form and substance reasonably acceptable to each Purchaser a certificate certifying (i) the Certificate of Incorporation of the Company, (ii) the Bylaws of the Company, (iii) resolutions of the Board of Directors (or an authorized committee thereof) approving the Transaction Documents and the transactions contemplated thereby and (iv) the good standing of the Company in the states of Delaware and California, as evidenced by good standing certificates from such states dated within five Business Days of the Closing Date.

(o)Beneficial Ownership Limitation. At Closing, the Company shall not issue or sell, and such Purchaser shall not purchase or acquire, any Securities under this Agreement which, when aggregated with all Securities then beneficially owned by such Purchaser and its Attribution Parties, would result in the beneficial ownership by the Purchaser of more than its Beneficial Ownership Limitation specified on Schedule 1 immediately after giving effect to the Closing and the application of the Beneficial Ownership Limitations of all other Purchasers hereunder.

(p)Closing. The Closing of the purchase of Securities by each Purchaser shall occur substantially concurrently. If required by a Purchaser pursuant to Section 1.1(b), the Company shall have delivered to such Purchaser evidence of the issuance of the Shares in the name of such Purchaser (or its nominee as directed by such Purchaser in its delivery instructions) dated as of the Closing Date prior to such Purchaser’s payment of its Aggregate Subscription Amount.

6.1    No later than the first business day immediately following the filing of the Company’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2023 (such Form 10-Q filing to occur no later than November 14, 2023) (the “Filing Date”), the Company shall file a registration statement covering the resale of the Registrable Securities with the SEC for an offering to be made on a continuous basis pursuant to Rule 415, or if Rule 415 is not available for offers and sales of the Registrable Securities, by such other means of distribution of Registrable Securities as the Holders of a majority of such Registrable Securities may reasonably specify (the “Initial Registration Statement”). The Initial Registration Statement shall be on Form S-3 (except if the Company is ineligible to register for resale the Registrable Securities on Form S-3, in which case such registration shall be on Form S-1) and the Company shall have the Initial Registration Statement declared effective, and any other qualifications or compliances (including, without limitation, the execution of any required undertaking to file post-effective amendments, appropriate qualifications or exemptions under applicable blue sky or other state securities laws and appropriate compliance with applicable securities laws, requirements or regulations), as promptly as possible after the filing thereof, but in any event prior to the date which is five days after the receipt of a notification of no-review in the event of no review by the SEC, or 60 days after the Filing Date in the event of a review by the SEC (the “Effectiveness Date”). For purposes of clarification, any failure by the Company to file the Initial Registration Statement by the Filing Date or to have such Registration Statement declared effective within such five days after the notification of no-review or 60 days after the Filing Date, as applicable, shall not otherwise relieve the Company of its obligations to file or have the Initial Registration Statement declared effective as set forth above in this Section 6.1.

In the event the SEC informs the Company that all of the Registrable Securities cannot, as a result of the application of Rule 415, be registered for resale as a secondary offering on a single registration statement, the Company agrees to promptly (i) inform each of the Holders thereof, (ii) use its best efforts to file amendments to the Initial Registration Statement as required by the SEC and/or (iii) withdraw the Initial Registration Statement and file a new registration statement (a “New Registration Statement”), in either case covering the maximum number of Registrable Securities permitted to be registered by the SEC, on Form S-3 or, if the Company is ineligible to register for resale the Registrable Securities on Form S-3, Form S-1; provided, however, that prior to filing such amendment or New Registration Statement, the Company shall be obligated to use its best efforts to advocate with the SEC for the registration of all of the Registrable Securities. In the event the Company amends the Initial Registration Statement or files a New Registration Statement, as the case may be, under clauses (ii) or (iii) above, the Company will use its best efforts to file with the SEC, within 30 days following the date allowed by the SEC, one or more registration statements on Form S-3 or, if the Company is ineligible to register for resale the Registrable Securities on Form S-3, Form S-1, to register for resale those Registrable Securities that were not registered for resale on the Initial Registration Statement, as amended, or the New Registration Statement (the “Remainder Registration Statements”). If the SEC limits the number of Registrable Securities permitted to be registered on a particular Registration Statement (and notwithstanding that the Company used diligent efforts to advocate with the SEC for the registration of all or a greater number of Registrable Securities), any required cutback of Registrable Securities (such Registrable Securities so cut back, the “Cut Back Securities”) shall be applied to the Purchasers pro rata in accordance with the number of such Registrable Securities sought to be included in such Registration Statement by reference to the amount of Registrable Securities set forth opposite such Purchaser’s name on Schedule 1 (and in the case of a subsequent transfer, the initial Purchaser’s transferee) relative to the aggregate amount of all Registrable Securities. In no event shall any Purchaser be identified as a statutory underwriter in the Registration Statement unless in response to a comment or request from the staff of the SEC or another regulatory agency; provided, that if the SEC requests that a Purchaser be identified as a statutory underwriter in the Registration Statement, such Purchaser will have an opportunity to withdraw from the Registration Statement.

6.2    All Registration Expenses incurred in connection with any registration, qualification, exemption or compliance pursuant to Section 6.1 shall be borne by the Company. All Selling Expenses relating to the sale of securities registered by or on behalf of a Holder shall be borne by such Holder.

6.3    The Company further agrees that, in the event that (i) the Initial Registration Statement has not been filed with the SEC by the Filing Date, (ii) the Initial Registration Statement or the New Registration Statement, as applicable, has not been declared effective by the SEC by the Effectiveness Date, (iii) after such Registration Statement is declared effective by the SEC, is suspended by the Company or ceases to remain continuously effective as to all Registrable Securities for which it is required to be effective, other than, in each case, within the time period(s) permitted by Section 6.7(b), or (iv) after the Filing Date, and only in the event a Registration Statement is not effective or available to sell the Registrable Securities, the Company fails to file with the SEC any required reports under Section 13 or 15(d) of the Exchange Act such that it is not in compliance with Rule 144(c)(1), as a result of which the Purchasers who are not affiliates of the Company are unable to sell Shares and/or Warrant Shares without restriction under Rule 144 (each such event referred to in clauses (i), (ii), (iii) and (iv), (a “Registration Default”)), the Company shall pay to each Purchaser 1.0% of such Purchaser’s Subscription Amount as set forth on Schedule 1 hereto of such Purchaser’s Registrable Securities on the occurrence of such Registration Default and for each 20-day period following such Registration Default (a “Penalty Period”) (provided the payment amount shall increase by 1.0% of such Purchaser’s Subscription Amount as set forth on Schedule 1 hereto for each subsequent

20-day period following the initial 20-day period), or pro rata for any portion thereof, during which the Registration Default remains uncured; provided, however, that if a Purchaser fails to provide the Company with any information that is required to be provided in such Registration Statement with respect to such Purchaser as set forth herein, then the commencement of the Penalty Period described above shall be extended until two Business Days with respect to such Purchaser following the date of receipt by the Company of such required information from such Purchaser; and provided, further, that in no event shall the Company be required hereunder to pay to any Purchaser pursuant to this Agreement more than 3.0% of such Purchaser’s Subscription Amount of such Purchaser’s Registrable Securities in any Penalty Period and in no event shall the Company be required hereunder to pay to any Purchaser pursuant to this Agreement an aggregate amount that exceeds 10.0% of the Subscription Amount paid by such Purchaser for such Purchaser’s Registrable Securities. The Company shall deliver said cash payment to the Purchaser by the fifth Business Day after the end of such Penalty Period. Notwithstanding any other provision of this Section 6.3, no Registration Default as to the Cut Back Securities shall be deemed to have occurred until the date that is 30 days following the date on which the SEC permits the Cut Back Securities to be registered, and the payment of any penalty pursuant to this Section 6.3 shall be calculated to apply only to the percentage of Registrable Securities which are permitted by the SEC to be registered within the timeframes provided for in this Agreement.

6.4    In the case of the registration, qualification, exemption or compliance effected by the Company pursuant to this Agreement, the Company shall, upon reasonable request, inform each Holder as to the status of such registration, qualification, exemption and compliance. At its expense the Company shall:

(a)except for such times as the Company is permitted hereunder to suspend the use of the prospectus forming part of a Registration Statement, use its best efforts to keep such registration, and any qualification, exemption or compliance under state securities laws which the Company determines to obtain, continuously effective with respect to a Holder, and to keep the applicable Registration Statement free of any material misstatements or omissions, until the earlier of the following: (i) the third anniversary of the date the initial Registration Statement is declared effective or (ii) the date all Shares and Warrant Shares (assuming cashless exercise) held by or issuable to such Holder may be sold under Rule 144 without being subject to any volume, manner of sale or publicly available information requirements. The period of time during which the Company is required hereunder to keep a Registration Statement effective is referred to herein as the “Registration Period.”

Statement or a supplement to the related prospectus, or file any other required document so that, as thereafter delivered to purchasers of the Registrable Securities included therein, such prospectus will not include any untrue statement of a material fact or omit to state any material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading;

(m)upon request of a Purchaser, permit counsel for the Purchasers to review any Registration Statement and all amendments and supplements thereto (other than supplements to a Registration Statement on Form S-1 solely for the purpose of incorporating other filings with the SEC into such Registration Statement and other than an amendment to a Registration Statement on Form S-1 for the purpose of converting such Registration Statement into a Registration Statement on Form S-3), within five Business Days prior to the filing thereof with the SEC; provided that each Purchaser shall have an opportunity to review all disclosures in which it is named prior to filing;

(n)permit each Purchaser to review the information contemplated to be included in the Selling Shareholder’s section of any Registration Statement relating to such Purchaser within five Business Days prior to the filing thereof with the SEC; provided that, in the case of clauses (l), (m) and (n) above, the Company shall not be required (A) to delay the filing of any Registration Statement or any amendment or supplement thereto as a result of any ongoing diligence inquiry by or on behalf of a Holder or to incorporate any comments to any Registration Statement or any amendment or supplement thereto by or on behalf of a Holder if such inquiry or comments would require a delay in the filing of such Registration Statement, amendment or supplement, as the case may be, or (B) to provide, and shall not provide, any Purchaser or its representatives with material, non-public information unless such Purchaser agrees to receive such information and enters into a written confidentiality agreement with the Company in a form reasonably acceptable to the Company; and provided further, that, in the case of clause (m) above, the Company shall pay the reasonable fees and expenses of outside counsel to RA Capital Healthcare Fund, L.P. in an amount not to exceed, in the aggregate, $20,000 (it being understood that a Purchaser may request, at its own expense, that its counsel be provided information as set forth in clause (m) above).

6.5    The Holders shall have no right to take any action to restrain, enjoin or otherwise delay any registration pursuant to Section 6.1 hereof as a result of any controversy that may arise with respect to the interpretation or implementation of this Agreement.

6.6    (a) To the extent permitted by law, the Company shall indemnify, defend and hold harmless each Purchaser or Holder or Affiliates and Attribution Parties, any other Person controlling such Purchaser or Holder within the meaning of Section 15 of the Securities Act, and each of their respective directors, managers, portfolio managers, investment advisors, officers, principals, partners, members, equityholders (regardless of whether such interest are held directly or indirectly), trustees, controlling persons, predecessors, successors and assigns, subsidiaries, employees, agents, advisors, attorneys and representatives (each a “Company Indemnified Party”), with respect to which any registration that has been effected pursuant to this Agreement, from and against all claims, losses, damages, expenses (including reasonable and documented fees and disbursements of external counsel) and liabilities (or action, suit, proceedings, inquiry or investigation in respect thereof), and shall reimburse each Company Indemnified Party upon demand for reasonable and documented fees and expenses of counsel and other expenses incurred by it in connection with investigating, preparing to defend or defending, or providing evidence in or preparing to serve or serving as a witness with respect thereto, including any of the foregoing incurred in settlement of any litigation, commenced or threatened (subject to Section 6.6(c) below), arising out of or based on (a) this Agreement (including as a result of any breach or inaccuracy of any representation, warranty or covenant of the Company herein) or (b) any untrue statement (or alleged untrue statement) of a material fact contained in any Registration Statement, prospectus, any amendment thereof or supplement thereto, or other document incident to any such registration, qualification or compliance or based on any omission (or alleged omission) to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in light of the circumstances in which they were made, or any violation by the Company of any rule or regulation promulgated under the Securities Act applicable to the Company and relating to any action or inaction required of the Company in connection with any such registration, qualification or compliance, and will reimburse each Company Indemnified Party, for reasonable legal and other out-of-pocket expenses reasonably incurred in connection with investigating or defending any such claim, loss, damage, liability or action as incurred; provided that the Company will not be liable in any such case to the extent that any untrue statement or omission or allegation thereof is made in reliance upon and in conformity with written information furnished to the Company by or on behalf of such Holder for use in preparation of any Registration Statement, prospectus, amendment or supplement; provided further, that the Company will not be liable in any such case where the claim, loss, damage or liability arises out of or is related to the failure of such Holder to comply with the covenants and agreements contained in this Agreement respecting sales of Registrable Securities which gave rise to such indemnification obligation. No Company Indemnified Party shall have any liability (whether direct or indirect, in contract, tort or otherwise) to the Company, for or in connection with the transactions contemplated hereby, except to the extent such liability results from such Company Indemnified Party’s bad faith, actual fraud, gross negligence or willful misconduct.

to the Company by or on behalf of the Holder expressly for inclusion in any Registration Statement, prospectus, amendment or supplement. Notwithstanding the foregoing, a Holder’s aggregate liability pursuant to this subsection (b) and subsection (d) shall be limited to the net amount (net of all expenses paid by such Holder in connection with any claim relating to this Section 6.6 and the amount of any damages such Holder has otherwise been required to pay by reason of such untrue statement or omission) actually received by the Holder from the sale of the Registrable Securities included in the Registration Statement giving rise to such indemnification obligations.

(p)Each party entitled to indemnification under this Section 6.6 (the “Indemnified Party”) shall give notice to the party required to provide indemnification (the “Indemnifying Party”) promptly after such Indemnified Party has actual knowledge of any claim as to which indemnity may be sought, and shall permit the Indemnifying Party (at its expense) to assume the defense of any such claim or any litigation resulting therefrom, provided that counsel for the Indemnifying Party, who shall conduct the defense of such claim or litigation, shall be approved by the Indemnified Party (whose approval shall not unreasonably be withheld), and the Indemnified Party may participate in such defense at such Indemnified Party’s expense, and provided further that the failure of any Indemnified Party to give notice as provided herein shall not relieve the Indemnifying Party of its obligations under this Agreement, unless such failure is materially prejudicial to the Indemnifying Party in defending such claim or litigation. An Indemnifying Party shall not be liable for any settlement of an action or claim effected without its written consent (which consent will not be unreasonably withheld). No Indemnifying Party, in its defense of any such claim or litigation, shall, except with the consent of each Indemnified Party, consent to entry of any judgment or enter into any settlement unless such judgment or settlement (a) includes as an explicit and unconditional term thereof the giving by the claimant or plaintiff to such Indemnified Party of a release from all liability in respect to such claim or litigation, (b) does not include a statement as to or an admission of fault, culpability, or a failure to act by or on behalf of such Indemnified Party and (c) imposes no liability or obligation on such Indemnified Party. No Company Indemnified Party shall be liable for any damages arising from the use by unauthorized persons of any information made available to the Company Indemnified Parties by or on behalf of the Company or its representatives through electronic, telecommunications or other information transmission systems that is intercepted by such persons.

6.7    (a) Each Holder agrees that, upon receipt of any notice from the Company of the happening of any event requiring the preparation of a supplement or amendment to a prospectus relating to Registrable Securities so that, as thereafter delivered to the Holders, such prospectus shall not contain an untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading (provided that in

no event shall such notice contain any material, nonpublic information), each Holder will forthwith discontinue disposition of Registrable Securities pursuant to a Registration Statement and prospectus contemplated by Section 6.1 until its receipt of copies of the supplemented or amended prospectus from the Company and, if so directed by the Company, each Holder shall deliver to the Company all copies, other than permanent file copies then in such Holder’s possession, of the prospectus covering such Registrable Securities current at the time of receipt of such notice.

6.8    With a view to making available to the Holders the benefits of certain rules and regulations of the SEC which at any time permit the sale of the Registrable Securities to the public without registration, so long as the Holders still own Registrable Securities, the Company shall use its best efforts to:

6.9    The rights to cause the Company to register Registrable Securities granted to the Holders by the Company under Section 6.1 may be assigned by a Holder in connection with a transfer by such Holder of all or a portion of its Registrable Securities, provided, however, that such transfer may otherwise be effected in accordance with the terms of this Agreement and applicable securities laws and such transferee agrees to comply with the terms and provisions of this Agreement. Except as specifically permitted by this Section 6.9, the rights of a Holder with respect to Registrable Securities as set out herein shall not be transferable to any other Person, and any attempted transfer shall cause all rights of such Holder therein to be forfeited. The Company shall not enter into any agreement, take any action, or permit any change to occur, with respect to its securities that violates or subordinates the rights expressly granted to the Holders in this Agreement.

6.10    The rights of any Holder under any provision of this Article 6 may be waived by such Holder as to itself (either generally or in a particular instance, either retroactively or prospectively and either for a specified period of time or indefinitely) or amended by an instrument in writing signed by such Holder.

7.1    “Acquiring Person” has the meaning set forth in Section 2.44.

7.2    “Affiliate” means, with respect to any Person (as defined below), any other Person controlling, controlled by or under direct or indirect common control with such Person (for the purposes of this definition “control,” when used with respect to any specified Person, shall mean the power to direct the management and policies of such Person, directly or indirectly, whether through ownership of voting securities, by contract or otherwise; and the terms “controlling” and “controlled” shall have meanings correlative to the foregoing).

7.3    “Agreement” has the meaning set forth in the preamble.

7.4    “Attribution Parties” means, with respect to any Person, such Person’s Affiliates and any other Person whose beneficial ownership of Common Stock would be aggregated with such Person’s for purposes of Section 13(d) or Section 16 of the Exchange Act and the applicable regulations of the SEC, including any “group” of which such Person is a member.

7.5    “Beneficial Ownership Limitation” means the percentage set forth opposite such Purchaser’s name on Schedule 1 hereto under the heading “Beneficial Ownership Limitation”.

7.6    “Board of Directors” means the board of directors of the Company.

7.7    “Business Day” means a day Monday through Friday on which banks are generally open for business in New York City.

7.8    “Closing” has the meaning set forth in Section 1.1(a).

7.9     “Closing Date” has the meaning set forth in Section 1.1(c).

7.10    “Common Stock” means the common stock, par value $0.0001 per share, of the Company.

7.11    “Cut Back Securities” has the meaning set forth in Section 6.1.

7.12    “Disclosure Time” means , (i) if this Agreement is signed on a day that is not a Business Day or after 9:00 a.m. (New York City time) and before midnight (New York City time) on any Business Day, 9:01 a.m. (New York City time) on the Business Day immediately following the date hereof and (ii) if this Agreement is signed between midnight (New York City time) and 9:00 a.m. (New York City time) on any Business Day, no later than 9:01 a.m. (New York City time) on the date hereof.

7.13    “Disqualification Event” has the meaning set forth in Section 2.46.

7.14     “Exchange Act” means the Securities Exchange Act of 1934, as amended.

7.15    “FDA” means the United States Food and Drug Administration.

7.16    “Filing Date” has the meaning set forth in Section 6.1.

7.17    “Holders” means any Person holding Registrable Securities or any Person to whom the rights under Article 6 have been transferred in accordance with Section 6.9 hereof.

7.18    “Indemnified Party” has the meaning set forth in Section 6.6(c).

7.19    “Indemnifying Party” has the meaning set forth in Section 6.6(c).

7.20    “Initial Registration Statement” has the meaning set forth in Section 6.1.

7.21    “Issuer Covered Person” has the meaning set forth in Section 2.46.

7.22    “Material Adverse Effect” means circumstances that could reasonably be expected to have a material adverse effect on (a) the business, operations, assets, condition (financial or otherwise) or prospects of the Company and its subsidiaries, taken as a whole, or (b) the ability of the Company to perform its obligations pursuant to the transactions contemplated by the Transaction Documents, including to consummate the transactions contemplated thereby.

7.23    “Nasdaq” means The Nasdaq Global Market.

7.24    “New Registration Statement” has the meaning set forth in Section 6.1.

7.25     “Penalty Period” has the meaning set forth in Section 6.3.

7.26    “Per Share Purchase Price” means $19.35.

7.27    “Person” means any person, individual, corporation, limited liability company, partnership, trust or other nongovernmental entity or any governmental agency, court, authority or other body (whether foreign, federal, state, local or otherwise).

7.28     “Pre-Funded Warrants” has the meaning set forth in Recital B to this Agreement, in the form of Exhibit A attached hereto.

7.29    “Purchasers” has the meaning set forth in the preamble.

7.30    The terms “register,” “registered” and “registration” refer to the registration effected by preparing and filing a registration statement in compliance with the Securities Act, and the declaration or ordering of the effectiveness of such registration statement.

7.31    “Registrable Securities” means (i) the Shares, (ii) the Warrant Shares, (iii) any other shares of Common Stock held by a Purchaser as of the Closing, and (iv) any shares of Common stock issuable upon exercise or conversion of other equity securities of the Company held by a Purchaser as of the Closing; provided, however, that the Shares, the Warrant Shares and such other shares of Common Stock shall only be treated as Registrable Securities if and only for so long as they (A) have not been disposed of pursuant to a registration statement declared effective by the SEC, (B) have not been sold in a transaction exempt from the registration and prospectus delivery requirements of the Securities Act so that all transfer restrictions and restrictive legends with respect thereto are removed upon the consummation of such sale or (C) are held by a Holder or a permitted transferee pursuant to Section 6.9.

7.32    “Registration Default” has the meaning set forth in Section 6.3.

7.33    “Registration Expenses” means all expenses incurred by the Company in complying with Section 6.1 hereof, including, without limitation, all registration, qualification and filing fees, printing expenses, escrow fees, fees and expenses of counsel for the Company, blue sky fees and expenses and the expense of any special audits incident to or required by any such registration (but excluding the fees of legal counsel for any Holder).

7.34    “Registration Period” has the meaning set forth in Section 6.4(a).

7.35    “Registration Statement” means any one or more registration statements of the Company filed under the Securities Act that covers the resale of any of the Registrable Securities pursuant to the provisions of this Agreement (including without limitation any Initial Registration Statement, any New Registration Statement and any Remainder Registration Statements) and amendments and supplements to such Registration Statements, including post-effective amendments.

7.36    “Remainder Registration Statement” has the meaning set forth in Section 6.1.

7.37    “Rule 144” means Rule 144 promulgated under the Securities Act, or any successor rule.

7.38    “Rule 415” means Rule 415 promulgated under the Securities Act, or any successor rule.

7.39    “SEC” means the United States Securities and Exchange Commission.

7.40    “SEC Documents” has the meaning set forth in Section 2.1.

7.41    “Securities” has the meaning set forth in Section 2.4.

7.42    “Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations thereunder, or any similar successor statute.

7.43    “Selling Expenses” means all selling commissions applicable to the sale of Registrable Securities and all fees and expenses of legal counsel for any Holder.

7.44    “Shares” has the meaning set forth in Recital B to this Agreement.

7.45    “Subscription Amount” has the meaning set forth in Section 1.1(a).

7.46    “Trading Day” means a day on which the principal Trading Market is open for trading.

7.47    “Trading Market” means any of the following markets or exchanges on which the shares of Common Stock are listed or quoted for trading on the date in question: the NYSE American, Nasdaq, or the New York Stock Exchange (or any successors to any of the foregoing).

7.48    “Transaction Documents” has the meaning set forth in Section 2.9.

7.49    “Transfer Agent” means Continental Stock Transfer & Trust or any successor transfer agent of the Company.

7.50     “Warrant Shares” means the shares of Common Stock issuable upon exercise of the Pre-Funded Warrants.

8.1    Governing Law; Jurisdiction. This Agreement will be governed by and interpreted in accordance with the laws of the State of New York without regard to the principles of conflict of laws (whether of the State of New York or any other jurisdiction) which would result in the application of the laws of any other jurisdiction. Any legal suit, action or proceeding arising out of or based upon this Agreement or the transactions contemplated hereby may be instituted in the federal courts of the United States of America located in the Borough of Manhattan in the City of New York or the courts of the State of New York in each case located in the Borough of Manhattan in the City of New York (collectively, the “Specified Courts”), and each party irrevocably submits to the exclusive jurisdiction (except for proceedings instituted in regard to the enforcement of a judgment of any such court, as to which such jurisdiction is non-exclusive) of such courts in any such suit, action or proceeding. Service of any process, summons, notice or document by mail to such party’s address set forth above shall be effective service of process for any suit, action or other proceeding brought in any such court. The parties irrevocably and unconditionally waive any objection to the laying of venue of any suit, action or other proceeding in the Specified Courts and irrevocably and unconditionally waive and agree not to plead or claim in any such court that any such suit, action or other proceeding brought in any such court has been brought in an inconvenient forum.

8.2    Counterparts; Signatures by Facsimile. This Agreement may be executed in counterparts, all of which are considered one and the same agreement and will become effective when counterparts have been signed by each party and delivered to the other parties. This Agreement may also be executed and delivered by facsimile signature, PDF or any electronic signature complying with the U.S. federal ESIGN Act of 2000 (e.g., www.docusign.com).

8.3     Headings. The headings of this Agreement are for convenience of reference only, are not part of this Agreement and do not affect its interpretation.

8.4     Severability. If any provision of this Agreement is invalid or unenforceable under any applicable statute or rule of law, then such provision will be deemed modified in order to conform with such statute or rule of law. Any provision hereof that may prove invalid or unenforceable under any law will not affect the validity or enforceability of any other provision hereof.

8.5    Entire Agreement; Amendments. The Transaction Documents (including all schedules and exhibits hereto and thereto) constitute the entire agreement among the parties hereto with respect to the subject matter hereof and thereof. There are no restrictions, promises, warranties or undertakings, other than those set forth or referred to herein or therein. The Transaction Documents supersede all prior agreements and understandings among the parties

hereto with respect to the subject matter hereof and thereof. No provision of this Agreement may be waived, modified, supplemented or amended except in a written instrument signed, in the case of an amendment, following the Closing by the Company and Purchasers which in the aggregate purchased at least 76% in interest of the Registrable Securities hereunder (the “Required Purchasers”), and prior to the Closing, the Company and each Purchaser, and, in the case of a waiver, by the party against whom enforcement of any such waived provision is sought, provided that (i) if any amendment or modification disproportionately and adversely impacts a Purchaser (or group of Purchasers), the consent of such disproportionately impacted Purchaser (or group of Purchasers) shall also be required and (ii) following the Closing, such Required Purchasers includes the consent of any Purchaser whose Subscription Amount, together with the Subscription Amounts of its Affiliates, was at least $29 million. No waiver of any default with respect to any provision, condition or requirement of this Agreement shall be deemed to be a continuing waiver in the future or a waiver of any subsequent default or a waiver of any other provision, condition or requirement hereof, nor shall any delay or omission of any party to exercise any right hereunder in any manner impair the exercise of any such right. Any amendment effected in accordance with this Section 8.5 shall be binding upon each Purchaser and holder of Securities and the Company. No consideration (including any modification of any Transaction Document) shall be offered or paid to any Person to amend or consent to a waiver or modification of any provision of the Transaction Documents unless the same consideration is also offered to all of the parties to the Transaction Documents. For clarification purposes, this provision constitutes a separate right granted to each Purchaser by the Company and negotiated separately by each Purchaser, and is intended for the Company to treat the Purchasers as a class and shall not in any way be construed as the Purchasers acting in concert or as a group with respect to the purchase, disposition or voting of Securities or otherwise.

8.6    Notices. All notices required or permitted hereunder shall be in writing and shall be deemed effectively given: (a) upon personal delivery to the party to be notified, (b) when sent by email or facsimile if sent during normal business hours of the recipient, and if sent at a time other than during normal business hours of the recipient, then on the next Business Day, in each case upon written confirmation of receipt (but disregarding any automatically generated message from the recipient), (c) five days after having been sent by registered or certified mail, return receipt requested, postage prepaid, or (d) one Business Day after deposit with a nationally recognized overnight courier, specifying next day delivery, with written verification of receipt. The addresses for such communications are:

                    3580 Carmel Mountain Road, Suite 300

                    San Diego, CA 92130

If to a Purchaser: To the address set forth immediately below such Purchaser’s name on the signature pages hereto. Each party will provide ten days’ advance written notice to the other parties of any change in its address.

8.7    Successors and Assigns. This Agreement is binding upon and inures to the benefit of the parties and their successors and assigns. The Company will not assign this Agreement or any rights or obligations hereunder without the prior written consent of the

Purchasers, and no Purchaser may assign this Agreement or any rights or obligations hereunder without the prior written consent of the Company, except a Purchaser may assign this Agreement (i) to an Affiliate provided that such transferee agrees in writing to be bound, with respect to the transferred Securities and (ii) as permitted in accordance with Section 6.9 hereof.

8.8    Third Party Beneficiaries. This Agreement is intended for the benefit of the parties hereto, their respective permitted successors and assigns, and is not for the benefit of, nor may any provision hereof be enforced by, any other Person, except as otherwise provided herein.

8.9    Further Assurances. Each party will do and perform, or cause to be done and performed, all such further acts and things, and will execute and deliver all other agreements, certificates, instruments and documents, as another party may reasonably request in order to carry out the intent and accomplish the purposes of this Agreement and the consummation of the transactions contemplated hereby.

8.10    No Strict Construction. The language used in this Agreement is deemed to be the language chosen by the parties to express their mutual intent, and no rules of strict construction will be applied against any party.

8.11    Equitable Relief. The Company acknowledges and agrees that the Company’s failure to perform or discharge any of its obligations under this Agreement will result in irreparable damage to the Purchasers and that monetary damages, even if available, would provide inadequate relief to the Purchasers. The Company therefore agrees that the Purchasers are entitled to temporary and permanent injunctive relief, including specific performance, in any such case and waives any requirement for the posting of a bond. Each Purchaser also acknowledges and agrees that its failure to perform or discharge any of its obligations under this Agreement will result in irreparable damage to the Company and that monetary damages, even if available, would provide inadequate relief to the Company. Each Purchaser therefore agrees that the Company is entitled to temporary and permanent injunctive relief, including specific performance, in any such case and waives any requirement for the posting of a bond.

8.12    Survival of Representations and Warranties. Notwithstanding any investigation made by any party to this Agreement, all representations and warranties made by the Company and the Purchasers herein shall survive for a period of one year following the Closing.

8.13    Independent Nature of Purchasers’ Obligations and Rights. The obligations of each Purchaser under this Agreement are several and not joint with the obligations of any other Purchaser, and no Purchaser shall be responsible in any way for the performance of the obligations of any other Purchaser under this Agreement. Nothing contained herein and no action taken by any Purchaser pursuant hereto, shall be deemed to constitute the Purchasers as a partnership, an association, a joint venture or any other kind of entity, or create a presumption that the Purchasers are in any way acting in concert or as a group, or are deemed affiliates with respect to such obligations or the transactions contemplated by this Agreement. Each Purchaser shall be entitled to independently protect and enforce its rights, including without limitation the rights arising out of this Agreement, and it shall not be necessary for any other Purchaser to be joined as an additional party in any proceeding for such purpose. The Company has elected to provide all Purchasers with the same terms of this Agreement for the convenience of the Company and not because it was required or requested to do so by any of the Purchasers. It is expressly understood and agreed that each provision contained in this Agreement is between the Company and a Purchaser, solely, and not between the Company and the Purchasers collectively and not between and among the Purchasers. Notwithstanding anything to the contrary in the foregoing, each of the Purchasers has been advised, and is being advised by this Agreement, to consult with an attorney before executing this Agreement, and each Purchaser has consulted (or

had an opportunity to consult) with counsel of such Purchaser’s choice concerning the terms and conditions of this Agreement for a reasonable period of time prior to the execution hereof and thereof.

8.15    Termination. This Agreement may be terminated (a) by written agreement of a Purchaser as to such Purchaser’s obligations and the Company, provided that the Company notifies each other Purchaser of such termination within one (1) calendar day of such termination (or if such termination occurs on the Closing Date, notice will be provided on the Closing Date), or (b) by any Purchaser, as to such Purchaser’s obligations hereunder only and without any effect whatsoever on the obligations between the Company and the other Purchasers, by written notice to the other parties, if the Closing has not been consummated on or before the fifth (5th) Business Day following the date hereof; provided, however, that no such termination will affect the right of any party to sue for any breach by any other party (or parties) occurring prior to such termination. The Company shall provide prompt notice of any such termination to each other Purchaser.

IN WITNESS WHEREOF, the undersigned has caused this Securities Purchase Agreement to be duly executed as of the date first above written.

IN WITNESS WHEREOF, the undersigned has caused this Securities Purchase Agreement to be duly executed as of the date first above written.