Sublease, dated as of January 23, 2025, by and among QT Imaging Holdings, Inc. and QT Imaging Center

This SUBLEASE AGREEMENT (this “Agreement”) is made effective as of [INSERT] (the “Effective Date”), by and among QT Imaging Holdings, Inc., A Delaware corporation (the “Company”), and QT Imaging Center, a California sole proprietorship of John C. Klock, M.D. (the “Practice”). Company and Practice may be referred to herein individually, as a “Party” and collectively, as the “Parties.”

A.Company is a medical device company that has leases space from Hamilton Landing Novato LLC (“Prime Lease”);

B.Practice conducts a medical practice with an office in California, which provides medical services, including the performance of breast imaging using the QT Ultrasound Breast Scanner-1, to patients through duly licensed physicians and other clinical professionals, including technicians; and

C.Company desires to sublease said space to Practice and the Parties desire to accept such engagement, in accordance with the terms and conditions of this Agreement.

NOW, THEREFORE, in consideration of these premises, the covenants set forth herein, and other good and valuable consideration, the receipt and sufficiency of which are hereby conclusively acknowledged, the Parties hereto, desiring to become legally bound, hereby agree as follows:

Company shall provide to Practice the full-time, exclusive use of the location(s) (the “Subleased Space”) set forth on Exhibit A. Practice agrees to sublease the Subleased Space on the same terms and conditions as set forth in the Prime Lease, a copy of which shall be provided to the Practice. In consideration of the Rent (defined below) to be remitted by Practice, Company shall provide Practice with the Subleased Space. To the extent applicable, Company's equipment and furnishings shall not be removed from the Subleased Space without the prior written approval of Company. Company shall provide janitorial services for the Subleased Space.

2.1Rent. During the Term, Practice will pay to Company a monthly rental fee of $5,666 until May 31, 2025. From June 1, 2025, to May 31, 2026, the monthly rental fee shall be $5,836.24. From June 1, 2026, until May 31, 2027, the monthly rental fee shall be $6,011.33 (collectively, the “Rent”).

2.2Payment. The Rent is due on the first day of each month (“Rent Due Date”), beginning on the month of Effective Date, and shall be paid by Practice no later than five (5) days after the Rent Due Date. The Rent shall be pro-rated for any partial month. In the event that Practice does not pay the Rent on the Rent Due Date, the Parties acknowledge that the Practice is in material breach of this Agreement and

As long as Practice is not in default hereunder beyond applicable notice and/or cure periods, Company covenants that Practice shall peaceably hold and enjoy the Subleased Space free from acts of Company or anyone claiming by, through or under Company, subject to the terms of this Agreement.

Practice accepts the Subleased Space in the condition they are in as of the Effective Date and agrees to maintain the Subleased Space in the same condition, order, and repair as they are at the commencement of the Term, excepting only reasonable wear and tear arising from the use thereof under this Agreement. Practice shall not make any alterations to the Subleased Space without Company's prior consent, which may be withheld in Company's sole discretion. Practice shall not permit the Subleased Space or the property on which they are located to become subject to any mechanics', laborers' or materialmen's lien on account of labor or material furnished to Practice or claimed to have been furnished to Practice in connection with work of any character performed or claimed to have been performed on the Subleased Space by, or at the direction or sufferance of, Practice.

Practice shall not further sublease the Subleased Space or otherwise assign this Agreement without Company’s prior written consent.

The Practice represents and warrants that it is duly organized as a professional entity in order to provide any clinical services in the Subleased Space, validly existing and in good standing as a professional entity in California, and has the full right, power and authority to enter into this Agreement. Further, the Practice represents and warrants that the Practice has selected the Subleased Space, and acknowledges and agrees that IT IS ACQUIRING THE RIGHT TO USE THE SUBLEASED SPACE “AS IS” AND “WHERE IS”, WITHOUT WARRANTY OR REPRESENTATION, EITHER EXPRESS OR IMPLIED, AS TO ANY MATTER WHATSOEVER. AS BETWEEN COMPANY AND THE PRACTICE, ALL SUCH RISKS WITH REGARD TO THE USE OF THE SUBLEASED SPACE SHALL BE BORNE BY THE PRACTICE.

Company shall have the right, upon prior written notice at reasonable hours, to enter on the Practice’s Subleased Space and inspect the Subleased Space and any records and documents regarding its use, maintenance and repair. The Company representative shall be accompanied by a representative of the

Practice during such inspection, which shall be done in a manner not to interfere with the Practice’s business.

9.1The Practice covenants and agrees that it shall maintain or cause to be maintained at all times and at its sole expense professional liability insurance, commercial general liability insurance (including product liability, public liability and property damage insurance), and all-risk property insurance (including sprinkler, vandalism, and malicious mischief coverage and including earthquake and flood coverage at, acceptable to Company with respect to all Subleased Space in commercially reasonable amounts, that at a minimum meet the amounts set forth in the Prime Lease. Notwithstanding the foregoing, such insurance shall meet at least the following limits: General Aggregate: $1,000,000; Products/Completed Operations Aggregate: $1,000,000; Each Occurrence: $1,000,000; Personal and Advertising Injury: $1,000,000; Medical Payments: $5,000 per person; Umbrella excess liability insurance $3,000,000/Occurrence and $3,000,000 Aggregate; Worker’s Compensation, in amounts required by State of California for the benefit of Practice’s employees and employer’s liability insurance in amounts of $1,000,000 bodily injury by disease per person, $1,000,000 bodily injury by accident; and $1,000,000 bodily injury by disease policy limit.

9.2Each policy providing such insurance shall be on an occurrence basis, shall name Company as additional insured and/or loss payee, as applicable, shall provide that it may be altered or canceled by the insurer only after thirty (30) days’ prior written notice to Company, shall provide breach of warranty protection, provide that such coverage is “primary” and, if it is an umbrella or excess liability policy and shall provide full coverage in the amount of its maximum limit in the event of the failure or absence of primary coverage. The Practice shall deliver to Company: (i) satisfactory evidence of the existence of such insurance upon demand; and (ii) satisfactory evidence of its renewal or replacement at least thirty (30) days before its expiration or cancellation. Company shall have full power to collect insurance proceeds and, at its option, apply them to any of the Practice’s obligations, whether or not matured, or to Subleased Space, and to retain any excess as security for the Practice’s obligations under this Agreement. The Practice grants Company power of attorney to sign, endorse or negotiate for Company’s benefit any instrument representing proceeds of any required insurance and Company will also have the right to compromise or settle any dispute with the insurance Company. If the Practice fails to maintain required insurance, Company may obtain such insurance as Company deems necessary, and the Practice shall reimburse Company upon demand for all premiums therefor.

10.1Term. Subject to earlier termination as set forth in this Section 10, the initial term of this Agreement shall commence as of the Effective Date and continue for a period of one (1) year (the “Initial Term”). Thereafter, this Agreement shall be in effect and rent paid on a month-to-month basis. ” This Agreement may be terminated at any time upon the mutual consent of the Parties; provided

10.2Termination Upon Termination of the Prime Lease. This Agreement shall automatically

terminate upon termination of the Prime Lease, which is set to terminate on April [ ], 2027.

10.3Termination Without Cause. Either Party may terminate this Sublease without cause, by providing the other Party with notice at least thirty (30) days prior to the end of the Initial Term or the then current Renewal Term.

10.4Termination for Material Breach. In addition to Company’s rights under Section 2.2, Company or Practice may terminate this Agreement upon the other Party’s breach of a material provision

of this Agreement, if the breaching Party fails to cure such breach within thirty (30) days following receipt of written notice thereof from the non- breaching Party, or fails to commence to cure such breach within such thirty (30) day period and diligently pursue such cure to completion.

10.5 Effect of Termination. Upon termination of this Agreement, Company shall be entitled to receive all Rent accrued but unpaid as of the date of termination and shall return the Subleased Space to Company in the same condition as they were received, subject to reasonable wear and tear. Further, any termination under this Section 10 shall not affect the Parties’ confidentiality and other obligations which by their terms survive termination of this Agreement.

11.1Confidentiality. Each Party covenants and agrees that it shall not, and shall cause its respective affiliates, employees, representatives and agents (collectively, “Representatives”), to not, directly or indirectly, disclose or use any other Party’s Confidential Information (as defined below) during the Term of this Agreement, or at any time thereafter, except as authorized by such other Party pursuant to this Agreement or as otherwise required by law. All Confidential Information is and shall remain the exclusive property of the disclosing Party upon the termination of this Agreement for any reason, and any such Confidential Information in the possession of any other Party or its respective Representatives, or to which any of the foregoing otherwise has access, shall be immediately returned to the disclosing Party. Each receiving Party and its Representatives shall not retain a copy of any other Party’s Confidential Information. Should a Party or its Representatives be required by law to disclose any such Confidential Information, it shall immediately give notice of such required disclosure, and shall reasonably cooperate with the disclosing Party if the disclosing Party pursues a protective order or otherwise takes action to protect the confidentiality of such information. Any breach of this provision is a material breach of this Agreement.

11.2Confidential Information. As used herein, “Confidential Information” means any and all confidential and proprietary information of Company or Practice, including, without limitation, methods of operation and information used in providing professional vascular or other medical services, including, without limitation, protocols, accounting records, patient records, sources of supply, organization details, personnel information, list of contracting entities, forms used in the business, fees charged for services, billing information, terms of contracts with third party payors, trade secrets, financial information, employee compensation, marketing plans, and other information concerning the business, operations or affairs of Company or Practice, their respective manner of operation, plans, proceeds or other data of any kind, nature or description, all of which information is proprietary and is and shall remain private and confidential.

Practice agrees to hold harmless and indemnify Company from any and all claims, damages and liability resulting from Practice’s non-compliance with law, or injury to any person or damage to property arising out of any act or failure to act on the part of Practice under the terms of this Agreement or the provision of services within the Subleased Space. Company agrees to hold harmless and indemnify Practice from any and all claims, damages and liability resulting from injury to any person or damage to property arising out of any act or failure to act on the part of Company under the terms of this Agreement. All personal property placed or moved in the Subleased Space shall be at the risk of Practice or owner thereof, and Company shall not be liable for any damage to said personal property. Company shall not be liable to Practice, or its guests, invitees, employees, for any property damage or personal injury thereto, however arising, except to the extent caused by any willful act of Company. The provisions of this Section 12.1 will survive any termination or expiration of this Agreement.

12.2Notices. All notices, consents, waivers and other communications required or permitted under this Agreement shall be sufficiently given for all purposes hereunder if in writing and (i) hand delivered, (ii) sent by certified or registered mail, return receipt requested and proper postage prepaid, or

(iii) sent by a nationally recognized courier service, in each case to the address and to the attention of the person (by name or title) set forth on, or to such other address and to the attention of such other person as a Party may designate by written notice to the other Party:

12.3Relationship of Parties. It is expressly understood and agreed that Company and Practice will at all times act as an independent contractors, and nothing contained in this Agreement will be construed to create an employer/employment relationship, joint venture, partnership, association, or other like relationship among the Parties.

12.4Assignment; Binding Effect. Neither of the Parties may assign its respective rights and duties under this Agreement without the prior written consent of the other Party, and any assignment without such prior written consent shall be null and void. Notwithstanding the foregoing, Company may assign this Agreement, in whole or in part, without the other Party’s prior written consent to any

successor in interest or third party that acquires all or substantially all of the Company’s assets. This Agreement shall be binding upon and inure to the benefit of the Parties, and their respective successors and permitted assigns.

12.5Authority. Each Party represents and warrants to the other Party that it has the capacity to enter into this Agreement; that this Agreement is a valid and binding agreement enforceable against such Party; and that the execution of this Agreement and performance its duties hereunder does not violate or conflict with any court order, governmental order, agreement, instrument or commitment by which such Party is otherwise bound.

12.6Compliance with Laws. Each Party warrants and represents that it shall comply with all applicable laws, ordinances, rules, regulations and orders of all governmental authorities and any other public or quasi-public authority having jurisdiction over such Party, the Subleased Space. Additionally:

(i)The Rent hereunder has been determined by the Parties to equal the fair market value of the Subleased Space furnished by Company to Practice, without taking into account the proximity of the Parties or the Subleased Space to any source of referrals, or the volume or value of any referrals of business from Company to Practice (which, for purposes of this Section includes members of its medical staff and affiliated practitioners), or from Practice to Company. The Subleased Space do not exceed that which is reasonable and necessary for the legitimate business purposes of Practice. The Rent payable hereunder has been determined by the Parties through good faith and arm’s length bargaining, and has been determined by the Parties to constitute the fair market value of the Subleased Space furnished by Company to Practice, and does not take into account any source of referrals or the volume or value of any patient referrals between the Parties (or their affiliates) that is reimbursed by any governmental or other third party payor. No amount paid hereunder is intended to be, nor shall it be construed to be, an inducement or payment for referral of, or recommending referral of, patients by any Party or its affiliates to any other Party or its affiliates, for the purchase, lease or ordering, or arranging for the purchase, lease or ordering of any item or service covered by any governmental, third party payor, or any patient. The Parties understand and agree that nothing in this Agreement is intended or shall be construed to require or encourage Company to refer patients for services to Practice. In addition, the Rent does not include any discount, rebate, kickback, or other reduction in charge. This Agreement is intended and shall be construed to comply with (A) the federal Anti-Kickback Statute, 42 U.S.C. § 1320a-7b, and its applicable safe harbors, (B) the federal Stark Law, 42 U.S.C. § 1395nn, and its applicable exceptions, to the extent applicable; and (C) any similar state laws.

(ii)Notwithstanding any other provision of this Agreement, if the governmental agencies that administer the Medicare, Medicaid or other federally funded programs, or any other federal, state or local governmental or non-governmental agency, or any court or administrative tribunal passes or promulgates any law, rule, regulation, standard, interpretation, order, decision or judgment including, without limitation, those relating to any applicable federal or state anti-kickback or self-referral statutes, which, in the good faith judgment of Company or Practice’s experienced healthcare counsel, materially and adversely affects Company’s ability to provide non-clinical administrative and management services or Practice’s licensure, accreditation, certification or ability to refer, to accept any referral, to bill, to claim, to present a bill or claim for reimbursement, or a risk of prosecution or civil monetary penalty (collectively and individually, an “Adverse Result”), Company and Practice shall each have the right, in good faith, to notify the other Party of the notifying Party’s intent to either amend or terminate this Agreement upon thirty (30) days’ prior written notice. During said thirty (30) day period, the Parties shall negotiate in good faith to amend this Agreement to eliminate the Adverse Result. In the

event that the Parties are unable to renegotiate the Agreement to eliminate such Adverse Result, this Agreement shall terminate upon the expiration of said thirty (30) day period or sooner if in connection with the termination, expiration, or non-renewal of the Services Agreement.

(b) Federal Health Care Program Exclusion/Debarment. At all times during the Term of this Agreement, each Party represents, warrants and covenants that neither it nor any of its owners or employees (as applicable) has been or shall be suspended, debarred or excluded from participating in the Medicare or Medicaid programs, or any other federal or state health care program (each, a “Government Program”). If any Party or its owners or employees (as applicable) is suspended, debarred or excluded from participating in any such program, such Party shall promptly notify the other Party, and the other Party may terminate this Agreement unless the adversely affected owner or employee (as applicable) is immediately removed and terminated by the applicable Party.

12.7 Further Assurances. Each Party agrees that, following the Effective Date, said Party will execute and deliver such further instruments and take such other actions as may be reasonably requested by the other Parties to carry out the purposes and intent of this Agreement and the transactions contemplated hereby.

12.8 Waiver. Any waiver by a Party of a breach of any provision of this Agreement shall not operate or be construed as a waiver of any other provision hereof and shall not be effective at any time unless in writing and signed by the Parties. A waiver of any of the terms and conditions hereto shall not be construed as a general waiver, and such waiving Party shall be free to reinstate any such term or condition, with or without notice to the other Party.

12.10 No Third-Party Beneficiaries. Nothing in this Agreement, express or implied, is intended to or shall confer upon any person, entity, company, partnership, limited liability company or other unincorporated association other than the Parties and their respective successors and permitted assigns any legal or equitable right, benefit or remedy of any nature under or by reason of this Agreement.

12.11 Entire Agreement; Amendment. This Agreement, together with any exhibits and attachments, constitutes the entire agreement of the Parties with respect to the subject matter hereof, and supersedes any and all prior or contemporaneous agreements between the Parties hereto, whether oral or written, with respect to such subject matter. This Agreement may be amended or modified only in a written instrument signed by the Parties hereto.

12.12 Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of California, without regard to conflicts-of-law principles that would require the application of any other law.

12.13 Venue; Waiver of Jury Trial. Each of the Parties hereby irrevocably and unconditionally

(i) consents to submit to the exclusive jurisdiction of the courts of California for any action or proceeding arising out of or relating to this Agreement and the transactions contemplated hereby (and agrees not to commence any such action or proceeding relating thereto except in such courts); (ii) waives and agrees not to plead or claim in any such court that any action or proceeding brought in any such court that any such action or proceeding brought in any such court has been brought in an inconvenient forum; and (iii)

waives any and all right to trial by jury in any action or proceeding arising out of or related to this Agreement or the transactions contemplated hereby.

12.14 Construction. This Agreement shall be interpreted without regard to any presumption or rule requiring construction against the Party causing this Agreement to be drafted.

12.15 Severability. In the event that a court of competent jurisdiction holds any provision of this Agreement invalid, illegal or unenforceable, such decision shall not affect the validity or enforceability of any other provisions of this Agreement, which other provisions shall remain in full force and effect, and the application of such invalid, illegal or unenforceable provision to Parties or circumstances other than those as to which it is held invalid, illegal or unenforceable shall be valid and be enforced to the fullest extent permitted by law. To the extent permitted by applicable law, each Party waives any provision of law that renders any provision of this Agreement invalid, illegal or unenforceable in any respect.

12.16 Headings; Terms. Captions, titles and headings to Articles, Sections or paragraphs of this Agreement are inserted for convenience of reference only and shall not affect the construction or interpretation of this Agreement. All defined terms and phrases used in this Agreement are equally applicable to both the singular and plural forms of such terms. Nouns and pronouns will be deemed to refer to the masculine, feminine or neuter, singular and plural, as the identity of the person(s) or entity(ies) may in the context require.

12.17 Counterparts; Facsimile Signatures. This Agreement may be executed in two (2) or more counterparts, each of which shall be deemed to be an original of this Agreement and all of which, when taken together, shall be deemed to constitute one and the same agreement. Any Party may deliver an executed copy hereof by facsimile or electronic transmission to the other Parties, and any such delivery shall have the same force and effect as delivery of a manually signed copy of this Agreement.