Amended and Restated Change in Control and Severance Agreement between Nautilus Biotechnology, Inc. and Subra Sankar, dated as of July 31, 2023

This Change in Control and Severance Agreement (the “Agreement”) is made by and between Nautilus Subsidiary Inc., a Delaware corporation (the “Company”), Nautilus Biotechnology, Inc., a Delaware corporation (“Nautilus”), and Subra Sankar (“Executive”), effective as of the date this Agreement is executed by both the Company and Executive (the “Effective Date”). Certain capitalized terms used in this Agreement are defined in Section 7 below.

This Agreement provides certain protections to Executive in connection with an involuntary termination of Executive’s employment under the circumstances described in this Agreement, including in connection with a change in control of Nautilus.

The Company and Executive agree as follows:

1.Term of Agreement. This Agreement will have an initial term of three (3) years commencing on the Effective Date (the “Initial Term”). On the three (3) year anniversary of the Effective Date, this Agreement will renew automatically for additional, one (1) year terms (each, an “Additional Term”) unless either party provides the other party with written notice of nonrenewal at least ninety (90) days prior to the date of automatic renewal. Notwithstanding the foregoing, if a Change in Control occurs (a) when there are fewer than twelve (12) months remaining during the Initial Term or (b) during an Additional Term, then the term of this Agreement will extend automatically through the date that is twelve (12) months following the date of the Change in Control. If Executive becomes entitled to the benefits under Section 3 of this Agreement, then the Agreement will not terminate until all of the obligations of the parties hereto with respect to this Agreement have been satisfied.

2.At-Will Employment. The Company and Executive acknowledge that Executive’s employment is and will continue to be at-will, as defined under applicable law. No payments, benefits, or provisions under this Agreement will confer upon Executive any right to continue Executive’s employment, nor will they interfere with or limit in any way the right of the Company (or other applicable member of the Company Group) or Executive to terminate such relationship at any time, with or without cause, to the extent permitted by applicable laws.

3.Severance Benefits.

3.1.Qualifying Termination Outside of the Change in Control Period. In the event of a Qualifying Termination that occurs other than during the Change in Control Period, the Company will provide, or will cause to be provided, to Executive the following payments and benefits, subject to the requirements of this Agreement:

3.1.1.Salary Severance. A single, lump sum, cash payment equal to fifty percent (50%) of Executive’s Salary.

3.1.2.COBRA Severance. Subject to Executive timely electing continuation coverage under the Consolidated Omnibus Budget Reconciliation Act of 1985, as amended (“COBRA”) and further subject to Section 5.3, the Company Group-paid employer portion of the premiums required for continued coverage pursuant to COBRA under the Company Group’s group health, dental and vision care plans for Executive and any of Executive’s eligible dependents, as applicable, following the Qualifying Termination until the earliest of: (a) six (6) months following the date of the Qualifying Termination, (b) the date on which Executive and Executive’s eligible dependents (as applicable)

become covered under similar plans, or (c) the expiration of Executive’s (and any of Executive’s eligible dependents’, as applicable) eligibility for continuation coverage under COBRA.

3.2. Qualifying Termination During the Change in Control Period. In the event of a Qualifying Termination that occurs during the Change in Control Period, the Company will provide, or cause to be provided, to Executive the following payments and benefits, subject to the requirements of this Agreement:

3.2.1.Salary Severance. A single, lump sum, cash payment equal to one hundred percent (100%) of Executive’s Salary.

3.2.2.Target Bonus Severance. A single, lump sum, cash payment equal to one hundred percent (100%) of Executive’s Target Bonus.

3.2.3.COBRA Severance. Subject to Executive timely electing continuation coverage under COBRA and further subject to Section 5.3, the Company Group-paid premiums required for continued coverage pursuant to COBRA under the Company Group’s group health, dental and vision care plans for Executive and any of Executive’s eligible dependents, as applicable, following the Qualifying Termination until the earliest of: (a) twelve (12) months following the date of the Qualifying Termination, (b) the date on which Executive and Executive’s eligible dependents (as applicable) become covered under similar plans, or (c) the expiration of Executive’s (and any of Executive’s eligible dependents, as applicable) eligibility for continuation coverage under COBRA.

3.2.4.Vesting Acceleration of Time-Based Awards. Vesting acceleration of one hundred percent (100%) of any Time-Based Awards that are outstanding and unvested as of the date of the Qualifying Termination. For the avoidance of doubt, in the event of Executive’s Qualifying Termination that occurs prior to a Change in Control, any then outstanding and unvested portion of Executive’s Awards will remain outstanding (and unvested) until the earlier of (x) three (3) months following the Qualifying Termination, or (y) a Change in Control that occurs within three (3) months following the Qualifying Termination, solely so that any benefits due on a Qualifying Termination can be provided if the Qualifying Termination occurs during the Change in Control Period (provided that in no event will Executive’s stock option Awards or similar Awards remain outstanding beyond the Award’s maximum term to expiration). If no Change in Control occurs within three (3) months following a Qualifying Termination, any unvested portion of Executive’s Awards automatically and permanently will be forfeited on the date three (3) months following the date of the Qualifying Termination without having vested.

3.3.Termination Other Than a Qualifying Termination. If the termination of Executive’s employment with the Company Group does not constitute a Qualifying Termination, then Executive will not be entitled to receive any severance or other benefits in connection with such termination except for those, if any, as may then be established under the Company Group’s then existing severance and benefits plans or programs applicable to Executive.

3.4.Non-duplication of Payment or Benefits. For purposes of clarity, in the event of a Qualifying Termination that occurs during the period within three (3) months prior to a Change in Control, any severance payments and benefits to be provided to Executive under Section 3.2 will be reduced by any amounts that already were provided to Executive under Section 3.1. Notwithstanding any provision of this Agreement to the contrary, if Executive is entitled to any cash severance, continued health coverage benefits, vesting acceleration of any Awards, or other severance or separation benefits similar to those provided under this Agreement, by operation of applicable law or under a plan, policy, contract, or arrangement sponsored by the Company or any other member of the Company Group or to

which the Company or any other member of the Company Group is a party other than this Agreement (“Other Benefits”), then the corresponding severance payments and benefits under this Agreement will be reduced by the amount of Other Benefits paid or provided to Executive.

3.5.Death of Executive. In the event of Executive’s death before all payments or benefits Executive is entitled to receive under this Agreement have been provided, the unpaid amounts will be provided to Executive’s designated beneficiary, if living, or otherwise to Executive’s personal representative in accordance with the terms of this Agreement.

3.6.Transfer Between Company Group Members. For purposes of this Agreement, if Executive is involuntarily transferred from one member of the Company Group to another, such transfer will not constitute a termination without Cause, but depending on the circumstances, such transfer may give Executive the ability to resign for Good Reason, subject to Section 7.11 and other requirements set forth in this Agreement.

4.Accrued Compensation. On any termination of Executive’s employment with the Company Group, Executive will be entitled to receive all accrued but unpaid vacation, expense reimbursements, wages, and other benefits due to Executive under any plans, policies, and arrangements of the Company (or other member of the Company Group, as applicable).

5.Conditions to Receipt of Severance.

5.1.Separation Agreement and Release of Claims. Executive’s receipt of any severance payments or benefits upon a Qualifying Termination under Section 3 is subject to Executive signing and not revoking the Company Group’s then standard separation agreement and release of claims (the “Release”), which must become effective and irrevocable no later than the sixtieth (60th) day following the date of the Qualifying Termination (the “Release Deadline Date”). If the Release does not become effective and irrevocable by the Release Deadline Date, Executive will forfeit any right to the severance payments or benefits under Section 3.

5.2.Payment Timing. Any lump sum cash severance payments under Section 3 relating to salary severance and any bonus severance will be provided to Executive on the first regularly scheduled payroll date of the Company (or other then-applicable member of the Company Group) following the date the Release becomes effective and irrevocable (or with respect to such payments under Section 3.2, if later, on the date of the Change in Control), subject to any delay required by Section 5.4 below. Any Time-Based Awards that are restricted stock units, performance shares, performance units, and/or similar full value awards (“Full Value Awards”) that accelerate vesting under Section 3.2.4 will be settled, subject to any delay required by Section 5.4 below (or the terms of the Full Value Award agreement or other Company Group plan, policy, or arrangement governing the settlement timing of the Full Value Award to the extent such terms specifically require any such delay in order to comply with the requirements of Section 409A, as applicable), (a) on a date within ten (10) days following the date the Release becomes effective and irrevocable, or (b) if later, in the event of a Qualifying Termination that occurs prior to a Change in Control, on a date on or before the date of completion of the Change in Control.

5.3.COBRA Severance Limitations. If the Company (or other applicable member of the Company Group) determines in its sole discretion that it cannot provide the COBRA-related benefits set forth in Section 3.1.2 or 3.2.3, as applicable (the “COBRA Severance”) without potentially violating, or being subject to an excise tax under, applicable law (including, without limitation, Section 2716 of the Public Health Service Act), then in lieu of such COBRA Severance, subject to any delay required by Section 5.4 below, the Company will provide, or cause to be provided, to Executive a

taxable monthly payment payable on the last day of a given month (except as provided by the last sentence in this Section 5.3), in an amount equal to (x) in the case of COBRA Severance under Section 3.1.2, the employer portion of the monthly COBRA premium necessary to continue coverage under the Company Group’s group health, dental and vision care plans for Executive and any of Executive’s eligible dependents, as applicable, as in effect on the date of the Qualifying Termination, or (y) in the case of COBRA Severance under Section 3.2.3, the monthly COBRA premium that would be required to continue coverage under the Company Group’s group health, dental and vision care plans for Executive and Executive’s eligible dependents, as applicable, as in effect on the date of the Qualifying Termination, in each case, which amount will be based on the premium rates applicable for the first month of COBRA Severance for Executive and any eligible dependents of Executive (each, a “COBRA Replacement Payment”), and which COBRA Replacement Payments will be made regardless of whether Executive elects COBRA continuation coverage and will end on the earlier of (a) the date upon which Executive obtains other employment, or (b) the date the Company Group has paid an amount totaling the number of COBRA Replacement Payments equal to the number of months in the applicable COBRA Severance period set forth in clause (a) of Section 3.1.2 or Section 3.2.3, as applicable. For the avoidance of doubt, the COBRA Replacement Payments may be used for any purpose, including, but not limited to continuation coverage under COBRA, and will be subject to any applicable withholdings. Notwithstanding anything to the contrary under this Agreement, if the Company (or other applicable member of the Company Group) determines in its sole discretion at any time that it cannot provide the COBRA Replacement Payments without violating applicable law (including, without limitation, Section 2716 of the Public Health Service Act), Executive will not receive the COBRA Replacement Payments or any further COBRA Severance.

5.4.Section 409A. The Company intends that all payments and benefits provided under this Agreement or otherwise are exempt from, or comply with, the requirements of Section 409A so that none of the payments or benefits will be subject to the additional tax imposed under Section 409A, and any ambiguities and ambiguous terms in this Agreement will be interpreted in accordance with this intent. No payments or benefits to be provided to Executive, if any, under this Agreement or otherwise, when considered together with any other severance payments or separation benefits that are considered deferred compensation under Section 409A (together, the “Deferred Payments”) will be paid or otherwise provided until Executive has a “separation from service” within the meaning of Section 409A. To the extent required to be exempt from or comply with Section 409A, references to the termination of Executive’s employment or similar phrases used in this Agreement will mean Executive’s “separation from service” within the meaning of Section 409A.

5.4.1.Any payments or benefits paid or provided under this Agreement that satisfy the requirements of the “short-term deferral” rule under Treasury Regulations Section 1.409A-1(b)(4), or that qualify as payments made as a result of an involuntary separation from service under Treasury Regulations Section 1.409A-1(b)(9)(iii) that is within the limit set forth thereunder, will not constitute Deferred Payments for purposes of this Section 5.4.

5.4.2.Notwithstanding any provisions to the contrary in this Agreement, if Executive is a “specified employee” within the meaning of Section 409A at the time of Executive’s separation from service (other than due to death), then any payments or benefits under this Agreement that constitute Deferred Payments payable within the first six (6) months after Executive’s separation from service instead will be payable on the date six (6) months and one (1) day after Executive’s separation from service; provided that in the event of Executive’s death within such six (6) month period, any payments delayed by this Section 5.4.2 will be paid to Executive in a lump sum as soon as administratively practicable after the date of Executive’s death. To the extent that Executive is not a specified employee but Executive’s Qualifying Termination occurs at a time during the year whereby the Release Deadline Date will occur in the year immediately following the year in which the Qualifying

Termination occurs, then any payments or benefits under this Agreement that constitute Deferred Payments that otherwise would be payable prior to the Release Deadline Date instead will be paid on the Release Deadline Date.

5.4.3.The Company reserves the right to amend this Agreement as it considers necessary or advisable, in its sole discretion and without the consent of Executive or any other individual, to comply with any provision required to avoid the imposition of the additional tax imposed under Section 409A or to otherwise avoid income recognition under Section 409A prior to the actual payment of any benefits or imposition of any additional tax. Each payment, installment, and benefit payable under this Agreement is intended to constitute a separate payment for purposes of Treasury Regulations Section 1.409A-2(b)(2). In no event will Executive have any discretion to choose Executive’s taxable year in which any payments or benefits are provided under this Agreement. In no event will the Company Group or any affiliate of the Company Group have any responsibility, liability or obligation to reimburse, indemnify or hold harmless Executive for any taxes, penalties or interest that may be imposed, or other costs that may be incurred, as a result of Section 409A.

6.Limitation on Payments.

6.1.Reduction of Severance Benefits. If any payment or benefit that Executive would receive from the Company Group or any other party whether in connection with the provisions in this Agreement or otherwise (the “Payments”) would (a) constitute a “parachute payment” within the meaning of Section 280G of the Code and (b) but for this sentence, be subject to the excise tax imposed by Section 4999 of the Code (the “Excise Tax”), then the Payments will be either delivered in full, or delivered as to such lesser extent that would result in no portion of the Payments being subject to the Excise Tax, whichever of the foregoing amounts, taking into account the applicable federal, state and local income taxes and the Excise Tax, results in Executive’s receipt, on an after-tax basis, of the greatest amount of Payments, notwithstanding that all or some of the Payments may be subject to the Excise Tax. If a reduction in Payments is made in accordance with the immediately preceding sentence, the reduction will occur, with respect to the Payments considered parachute payments within the meaning of Code Section 280G, in the following order: (i) reduction of cash payments in reverse chronological order (that is, the cash payment owed on the latest date following the occurrence of the event triggering the Excise Tax will be the first cash payment to be reduced); (ii) cancellation of equity awards that were granted “contingent on a change in ownership or control” within the meaning of Section 280G of the Code in the reverse order of date of grant of the equity awards (that is, the most recently granted equity awards will be cancelled first); (iii) reduction of the accelerated vesting of equity awards in the reverse order of date of grant of the equity awards (that is, the vesting of the most recently granted equity awards will be cancelled first); and (iv) reduction of employee benefits in reverse chronological order (that is, the benefit owed on the latest date following the occurrence of the event triggering the Excise Tax will be the first benefit to be reduced). In no event will Executive have any discretion with respect to the ordering of Payment reductions. Executive will be solely responsible for the payment of all personal tax liability that is incurred as a result of the payments and benefits received under this Agreement, and neither the Company Group nor any affiliate of the Company Group have any responsibility, liability or obligation to reimburse, indemnify or hold harmless Executive for any of those payments of personal tax liability.

6.2.Determination of Excise Tax Liability. Unless the Company (or Nautilus, as applicable) and Executive otherwise agree in writing, any determinations required under this Section 6 will be made in writing by a nationally recognized accounting or valuation firm (the “Firm”) selected by the Company (or Nautilus, as applicable), whose determinations will be conclusive and binding upon Executive and the Company Group for all purposes. For purposes of making the calculations required by this Section 6, the Firm may make reasonable assumptions and approximations concerning applicable

taxes and may rely on reasonable, good faith interpretations concerning the application of Sections 280G and 4999 of the Code. The Company Group and Executive will furnish to the Firm such information and documents as the Firm reasonably may request in order to make determinations under this Section 6. The Company will bear the costs and make all payments required to be made to the Firm for the Firm’s services that are rendered in connection with any calculations contemplated by this Section 6. The Company Group will have no liability to Executive for the determinations of the Firm.

7.Definitions.

7.1.“Award” means stock options and other equity awards covering shares of Nautilus common stock granted to Executive.

7.2.“Board” means the Board of Directors of Nautilus.

7.3.“Cause” means: (a) Executive’s failure to substantially perform Executive’s material duties and obligations as an employee (for reasons other than Executive’s death or Disability), which failure is not cured to the sole and reasonable satisfaction of the Company; (b) Executive’s failure or refusal to comply with the policies, standards and regulations established by the Company Group from time to time, which failure is not cured to the sole and reasonable satisfaction of the Company; (c) any act of personal dishonesty, moral turpitude, fraud, embezzlement, misrepresentation, or other unlawful act committed by Executive that results in harm to Nautilus or any other member of the Company Group, or any of their respective affiliates, including financial or reputational, which harm will be determined in the Company’s sole and reasonable discretion; (d) Executive’s violation of a federal or state law or regulation applicable to the business of Nautilus or any other member of the Company Group, or any of their respective affiliates; (e) Executive being convicted of, or entering a plea of nolo contendere or guilty to, a felony under the laws of the United States or its equivalent in the jurisdiction in which the act that constituted the felony occurred; (f) Executive’s material breach of the terms of this Agreement or any other agreement between Executive and any member of the Company Group (or any affiliate of the Company Group); or (g) Nautilus’ or the Company’s economic duress or necessity, as determined by the Company, in its sole and reasonable discretion. With respect to clauses (a) and (b) above only, Executive will have ten (10) days to cure following written notice of Executive’s failure or refusal to perform or comply, provided that whether the failure is curable will be within the Company’s sole and reasonable discretion.

7.4.“Change in Control” means the first occurrence of any of the following events on or after the Effective Date:

7.4.1.Change in Ownership of Nautilus. A change in the ownership of Nautilus which occurs on the date that any one person, or more than one person acting as a group (“Person”), acquires ownership of the stock of Nautilus that, together with the stock held by such Person, constitutes more than fifty percent (50%) of the total voting power of the stock of Nautilus; provided, however, that for purposes of this subsection, the acquisition of additional stock by any one Person, who is considered to own more than fifty percent (50%) of the total voting power of the stock of Nautilus will not be considered a Change in Control; provided, further, that any change in the ownership of the stock of Nautilus as a result of a private financing of Nautilus that is approved by the Board also will not be considered a Change in Control. Further, if the stockholders of Nautilus immediately before such change in ownership continue to retain immediately after the change in ownership, in substantially the same proportions as their ownership of shares of Nautilus’ voting stock immediately prior to the change in ownership, direct or indirect beneficial ownership of fifty percent (50%) or more of the total voting power of the stock of Nautilus or of the ultimate parent entity of Nautilus, such event shall not be considered a Change in Control under this Section 7.4.1. For this purpose, indirect beneficial ownership

shall include, without limitation, an interest resulting from ownership of the voting securities of one or more corporations or other business entities which own Nautilus, as the case may be, either directly or through one or more subsidiary corporations or other business entities; or

7.4.2.Change in Effective Control of Nautilus. If Nautilus has a class of securities registered pursuant to Section 12 of the U.S. Securities Exchange Act of 1934, as amended, a change in the effective control of Nautilus which occurs on the date that a majority of members of the Board is replaced during any twelve (12) month period by Directors whose appointment or election is not endorsed by a majority of the members of the Board prior to the date of the appointment or election. For purposes of this Section 7.4.2, if any Person is considered to be in effective control of Nautilus, the acquisition of additional control of Nautilus by the same Person will not be considered a Change in Control; or

7.4.3.Change in Ownership of a Substantial Portion of Nautilus’ Assets. A change in the ownership of a substantial portion of Nautilus’ assets which occurs on the date that any Person acquires (or has acquired during the twelve (12) month period ending on the date of the most recent acquisition by such Person or Persons) assets from Nautilus that have a total gross fair market value equal to or more than fifty percent (50%) of the total gross fair market value of all of the assets of Nautilus immediately prior to such acquisition or acquisitions; provided, however, that for purposes of this Section 7.4.3, the following will not constitute a change in the ownership of a substantial portion of Nautilus’ assets: (a) a transfer to an entity that is controlled by Nautilus’ stockholders immediately after the transfer, or (b) a transfer of assets by Nautilus to: (i) a stockholder of Nautilus (immediately before the asset transfer) in exchange for or with respect to Nautilus’ stock, (ii) an entity, fifty percent (50%) or more of the total value or voting power of which is owned, directly or indirectly, by Nautilus, (iii) a Person, that owns, directly or indirectly, fifty percent (50%) or more of the total value or voting power of all the outstanding stock of Nautilus, or (iv) an entity, at least fifty percent (50%) of the total value or voting power of which is owned, directly or indirectly, by a Person described in this Section 7.4.3(b)(iii). For purposes of this Section 7.4.3, gross fair market value means the value of the assets of Nautilus, or the value of the assets being disposed of, determined without regard to any liabilities associated with such assets.

For purposes of this Change in Control definition under Section 7.4, persons will be considered to be acting as a group if they are owners of a corporation that enters into a merger, consolidation, purchase or acquisition of stock, or similar business transaction with Nautilus.

Notwithstanding the foregoing, a transaction will not be deemed a Change in Control unless the transaction qualifies as a change in control event within the meaning of Section 409A. Further and for the avoidance of doubt, a transaction will not constitute a Change in Control if: (x) its sole purpose is to change the jurisdiction of Nautilus’ incorporation, or (y) its sole purpose is to create a holding company that will be owned in substantially the same proportions by the persons who held Nautilus’ securities immediately before such transaction.

7.5.“Change in Control Period” means the period beginning on the date three (3) months prior to a Change in Control and ending on (and inclusive of) the date that is the one (1) year anniversary of a Change in Control.

7.6.“Code” means the Internal Revenue Code of 1986, as amended. Reference to a specific section of the Code or regulation thereunder will include such section or regulation, any valid regulation promulgated under such section, and any comparable provision of any future legislation or regulation amending, supplementing or superseding such section or regulation.

7.7.“Company Group” means Nautilus, the Company, and each of Nautilus’ other subsidiaries.

7.8.“Confidentiality Agreement” means Executive’s At-Will Employment, Confidential Information, Invention Assignment and Arbitration Agreements or similar agreements entered into with the Company including that which is dated of even date herewith, as amended from time to time.

7.9.“Director” means a member of the Board.

7.10.“Disability” means total and permanent disability as defined in Code Section 22(e)(3).

7.11.“Good Reason” means Executive’s termination of Executive’s employment with the Company Group within ninety (90) days following the expiration of the Company’s Cure Period (as defined below) following the occurrence of any of the following without Executive’s written consent: (a) a material reduction in Executive’s responsibilities, provided that neither a mere change in title nor reassignment following a Change in Control to a position that is substantially similar to the position held prior to the Change in Control will constitute a material reduction in job responsibilities; (b) relocation by the Company Group (or parent, affiliate or successor thereto, as applicable) of Executive’s principal work location to a principal work location more than forty (40) miles from Executive’s principal work location immediately before such relocation; or (c) a reduction in Executive’s then current base salary by at least ten percent (10%), provided that an across-the-board reduction in the salary level of all other similarly situated employees by the same percentage amount as part of a general salary level reduction will not constitute such a reduction under this clause (c). In order for an event to qualify as Good Reason, Executive must not terminate employment with the Company Group without first providing the Company Group with written notice of the acts or omissions constituting the grounds for “Good Reason” within ninety (90) days following the initial existence of the grounds for “Good Reason” and a cure period of thirty (30) days following the date of such notice (the “Cure Period”). To the extent Executive’s principal work location is not the Company Group’s corporate offices or facilities due to a shelter-in-place order, quarantine order, or similar work-from-home requirement that applies to Executive, Executive’s principal work location, from which a change in location under the foregoing clause (b) will be measured, will be considered the Company Group’s office or facility location where Executive’s employment with the Company Group primarily was based immediately prior to the commencement of such shelter-in-place order, quarantine order, or similar work-from-home requirement.

7.12.“Qualifying Termination” means a termination of Executive’s employment with the Company Group either (a) by the Company Group without Cause and other than due to Executive’s death or Disability (provided that the transfer of Executive’s employment to another member of the Company Group shall not be deemed to constitute the Company’s termination of Executive’s employment with the Company Group), or (b) by Executive for Good Reason.

7.13.“Salary” means Executive’s annual base salary in effect immediately prior to Executive’s Qualifying Termination (or, if the termination is due to a resignation for Good Reason based on a material reduction in Executive’s base salary, then Executive’s annual base salary in effect immediately prior to the reduction) or, if Executive’s Qualifying Termination occurs during the Change in Control Period and the amount is greater, Executive’s annual base salary in effect immediately prior to the Change in Control.

7.14.“Section 409A” means Code Section 409A and the Treasury Regulations and guidance thereunder, and any applicable state law equivalent, as each may be promulgated, amended or modified from time to time.

7.15.“Target Bonus” means Executive’s annual (or annualized, as applicable) target bonus in effect immediately prior to Executive’s Qualifying Termination or, if Executive’s Qualifying Termination occurs during the Change in Control Period and the amount is greater, Executive’s annual (or annualized, if applicable) target bonus in effect immediately prior to the Change in Control.

7.16.“Time-Based Awards” means Awards that, as of the date of the Qualifying Termination, or in the case of a Qualifying Termination during the Change in Control Period, the later of the date of the Qualifying Termination or immediately prior to the Change in Control, are held by Executive and subject to continued service-based vesting criteria, but not subject to the achievement of any performance-based or other similar vesting criteria.

8.Successors. This Agreement will be binding upon and inure to the benefit of (a) the heirs, executors, and legal representatives of Executive upon Executive’s death, and (b) any successor of the Company Group. Any such successor of the Company Group will be deemed substituted for the Company Group under the terms of this Agreement for all purposes. For this purpose, “successor” means any person, firm, corporation, or other business entity which at any time, whether by purchase, merger, or otherwise, directly or indirectly acquires all or substantially all of the assets or business of the Company Group. None of the rights of Executive to receive any form of compensation payable pursuant to this Agreement may be assigned or transferred except by will or the laws of descent and distribution. Any other attempted assignment, transfer, conveyance, or other disposition of Executive’s right to compensation or other benefits will be null and void.

9.Notice.

9.1.General. All notices and other communications required or permitted under this Agreement will be in writing and will be effectively given (a) upon actual delivery to the party to be notified, (b) upon transmission by email, (c) twenty-four (24) hours after confirmed facsimile transmission, (d) one (1) business day after deposit with a recognized overnight courier, or (e) three (3) business days after deposit with the U.S. Postal Service by first class certified or registered mail, return receipt requested, postage prepaid, addressed: (i) if to Executive, at the address Executive will have most recently furnished to the Company in writing, (ii) if to the Company, at the following address:

Nautilus Subsidiary, Inc.

2701 Eastlake Avenue East

Seattle, WA 98102

Attention: Chief Executive Officer

9.2.Notice of Termination. Any termination of Executive’s employment by the Company Group for Cause will be communicated by a notice of termination of Executive’s employment to Executive, and any termination by Executive for Good Reason will be communicated by a notice of termination to the Company Group, in each case given in accordance with Section 9.1. The notice will indicate the specific termination provision in this Agreement relied upon, will set forth in reasonable detail the facts and circumstances claimed to provide a basis for termination under the provision so indicated, and will specify the termination date (which will be not more than thirty (30) days after the later of (i) the giving of the notice or (ii) the end of any applicable cure period, except as set forth in Section 7.11).

10.Resignation. The termination of Executive’s employment with the Company Group for any reason also will constitute, without any further required action by Executive, Executive’s voluntary resignation from all officer and/or director positions held at the Company Group or any of its affiliates, and at the Company Group’s request, Executive will execute any documents reasonably necessary to reflect the resignations.

11.Miscellaneous Provisions.

11.1.No Duty to Mitigate. Executive will not be required to mitigate the amount of any payment contemplated by this Agreement, nor will any payment be reduced by any earnings that Executive may receive from any other source except as specified in Sections 3.4, 5.3, 5.4.3, and 6.

11.2.Waiver; Amendment. No provision of this Agreement will be modified, waived or discharged unless the modification, waiver or discharge is agreed to in writing and signed by an authorized officer of the Company (other than Executive) and by Executive. No waiver by either party of any breach of, or of compliance with, any condition or provision of this Agreement by the other party will be considered a waiver of any other condition or provision or of the same condition or provision at another time.

11.3.Headings. Headings are provided herein for convenience only, and will not serve as a basis for interpretation or construction of this Agreement.

11.4.Entire Agreement. This Agreement, together with the Confidentiality Agreement, Nautilus’ 2021 Equity Incentive Plan and/or 2017 Equity Incentive Plan and award agreements thereunder governing Executive’s Awards, and confirmatory employment letter entered into with the Company of even date herewith, constitutes the entire agreement of the parties and supersedes in their entirety all prior representations, understandings, undertakings or agreements (whether oral or written and whether expressed or implied) of the parties with respect to the subject matter of this Agreement, including, without limitation, any Change in Control and Severance Agreement previously entered into between Executive and Nautilus, as applicable.

11.5.Governing Law. This Agreement will be governed by the laws of the State of California but without regard to the conflict of law provision. To the extent that any lawsuit is permitted with respect to any provisions under this Agreement, Executive hereby expressly consents to the personal and exclusive jurisdiction and venue of the state and federal courts located in the State of California for any lawsuit filed against Executive by the Company Group.

11.6.Severability. If any provision of this Agreement is or becomes or is deemed to be invalid, illegal, or unenforceable for any reason, such invalidity, illegality, or unenforceability will not affect the remaining parts of this Agreement, and this Agreement will be construed and enforced as if the invalid, illegal, or unenforceable provision had not been included.

11.7.Withholding. The Company (and any parent, subsidiary or other affiliate of the Company or other member of the Company Group, as applicable) will have the right and authority to deduct from any payments or benefits all applicable federal, state, local, and/or non U.S. taxes or other required withholdings and payroll deductions (“Withholdings”). Prior to the payment of any amounts or provision of any benefits under this Agreement, the Company (and any parent, subsidiary or other affiliate of the Company or other member of the Company Group, as applicable) is permitted to deduct or withhold, or require Executive to remit to the Company Group, an amount sufficient to satisfy any applicable Withholdings with respect to such payments and benefits. Neither the Company nor any parent, subsidiary or other affiliate of the Company or other member of the Company Group will have

any responsibility, liability or obligation to pay Executive’s taxes arising from or relating to any payments or benefits under this Agreement.

11.8.Counterparts. This Agreement may be executed in counterparts, each of which will be deemed an original, but all of which together will constitute one and the same instrument.

By its signature below, each of the parties signifies its acceptance of the terms of this Agreement, in the case of the Company by its duly authorized officer.

    By: /s/ Sujal Patel    

    Sujal Patel

    Title: Chief Executive Officer    

    Date: July 31, 2023    

    By: /s/ Sujal Patel    

    Sujal Patel

    Title: Chief Executive Officer    

    Date: July 31, 2023    

    Subra Sankar

    Date: July 31, 2023