If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).






SCHEDULE 13D




Comment for Type of Reporting Person:
All shares are held by Versant VI (as defined in Item 2(a) of the Original Schedule 13D (as defined in Item 1 below)). Versant Ventures VI GP-GP (as defined in Item 2(a) of the Original Schedule 13D) is the general partner of Versant Ventures VI GP (as defined in Item 2(a) of the Original Schedule 13D), which is the general partner of Versant VI. Each of Versant Ventures VI GP-GP and Versant Ventures VI GP may be deemed to share voting, investment and dispositive power with respect to the shares held by Versant VI. The percentage in Row 13 is based on 28,146,154 shares of Common Stock (as defined in Item 1 of the Original Schedule 13D) outstanding as of May 1, 2025, as set forth in the Issuer's quarterly report on Form 10-Q for the quarter ended March 31, 2025, filed with the United States Securities and Exchange Commission (the "Commission") on May 7, 2025 (the "Form 10-Q").


SCHEDULE 13D




Comment for Type of Reporting Person:
All shares are held by Versant VI. Versant Ventures VI GP-GP is the general partner of Versant Ventures VI GP, which is the general partner of Versant VI. Each of Versant Ventures VI GP-GP and Versant Ventures VI GP may be deemed to share voting, investment and dispositive power with respect to the shares held by Versant VI. The percentage in Row 13 is based on 28,146,154 shares of Common Stock outstanding as of May 1, 2025, as reported by the Issuer in the Form 10-Q.


SCHEDULE 13D




Comment for Type of Reporting Person:
All shares are held by Versant VI. Versant Ventures VI GP-GP is the general partner of Versant Ventures VI GP, which is the general partner of Versant VI. Each of Versant Ventures VI GP-GP and Versant Ventures VI GP may be deemed to share voting, investment and dispositive power with respect to the shares held by Versant VI. The percentage in Row 13 is based on 28,146,154 shares of Common Stock outstanding as of May 1, 2025, as reported by the Issuer in the Form 10-Q.


SCHEDULE 13D




Comment for Type of Reporting Person:
All shares are held by Versant Vantage II (as defined in Item 2(a) of the Original Schedule 13D). Versant Vantage II GP (as defined in Item 2(a) of the Original Schedule 13D) is the general partner of Versant Vantage II, and Versant Vantage II GP-GP (as defined in Item 2(a) of the Original Schedule 13D) is the general partner of Versant Vantage II GP. Each of Versant Vantage II GP and Versant Vantage II GP-GP share voting, investment and dispositive power over the shares held by Versant Vantage II. The percentage in Row 13 is based on 28,146,154 shares of Common Stock outstanding as of May 1, 2025, as reported by the Issuer in the Form 10-Q.


SCHEDULE 13D




Comment for Type of Reporting Person:
All shares are held by Versant Vantage II. Versant Vantage II GP is the general partner of Versant Vantage II, and Versant Vantage II GP-GP is the general partner of Versant Vantage II GP. Each of Versant Vantage II GP and Versant Vantage II GP-GP share voting, investment and dispositive power over the shares held by Versant Vantage II. The percentage in Row 13 is based on 28,146,154 shares of Common Stock outstanding as of May 1, 2025, as reported by the Issuer in the Form 10-Q.


SCHEDULE 13D




Comment for Type of Reporting Person:
All shares are held by Versant Vantage II. Versant Vantage II GP is the general partner of Versant Vantage II, and Versant Vantage II GP-GP is the general partner of Versant Vantage II GP. Each of Versant Vantage II GP and Versant Vantage II GP-GP share voting, investment and dispositive power over the shares held by Versant Vantage II. The percentage in Row 13 is based on 28,146,154 shares of Common Stock outstanding as of May 1, 2025, as reported by the Issuer in the Form 10-Q.


SCHEDULE 13D




Comment for Type of Reporting Person:
Consists of (i) 1,248,789 shares of Common Stock held by Versant VII (as defined in Item 2(a) of the Original Schedule 13D) and (ii) 70,534 shares of Common Stock issuable upon exercise of a warrant to purchase shares of Common Stock (the "Warrant") held by Versant VII. Versant Ventures VII GP-GP (as defined in Item 2(a) of the Original Schedule 13D) is the general partner of Versant Ventures VII GP (as defined in Item 2(a) of the Original Schedule 13D), which is the general partner of Versant VII. Each of Versant Ventures VII GP-GP and Versant Ventures VII GP may be deemed to share voting, investment and dispositive power with respect to the shares held by Versant VII. The percentage in Row 13 is based upon 28,216,688 shares of Common Stock, which consists of (i) 28,146,154 shares of Common Stock outstanding as of May 1, 2025, as set forth in the Form 10-Q, plus (ii) 70,534 shares of Common Stock issuable upon exercise of the Warrant held by Versant VII.


SCHEDULE 13D




Comment for Type of Reporting Person:
Consists of (i) 1,248,789 shares of Common Stock held by Versant VII and (ii) 70,534 shares of Common Stock issuable upon exercise of the Warrant held by Versant VII. Versant Ventures VII GP-GP is the general partner of Versant Ventures VII GP, which is the general partner of Versant VII. Each of Versant Ventures VII GP-GP and Versant Ventures VII GP may be deemed to share voting, investment and dispositive power with respect to the shares held by Versant VII. The percentage in Row 13 is based upon 28,216,688 shares of Common Stock, which consists of (i) 28,146,154 shares of Common Stock outstanding as of May 1, 2025, as set forth in the Form 10-Q, plus (ii) 70,534 shares of Common Stock issuable upon exercise of the Warrant held by Versant VII.


SCHEDULE 13D




Comment for Type of Reporting Person:
Consists of (i) 1,248,789 shares of Common Stock held by Versant VII and (ii) 70,534 shares of Common Stock issuable upon exercise of the Warrant held by Versant VII. Versant Ventures VII GP-GP is the general partner of Versant Ventures VII GP, which is the general partner of Versant VII. Each of Versant Ventures VII GP-GP and Versant Ventures VII GP may be deemed to share voting, investment and dispositive power with respect to the shares held by Versant VII. The percentage in Row 13 is based upon 28,216,688 shares of Common Stock, which consists of (i) 28,146,154 shares of Common Stock outstanding as of May 1, 2025, as set forth in the Form 10-Q, plus (ii) 70,534 shares of Common Stock issuable upon exercise of the Warrant held by Versant VII.


SCHEDULE 13D


 
Versant Venture Capital VI, L.P.
 
Signature:/s/Max Eisenberg
Name/Title:Max Eisenberg/COO of Versant Ventures VI GP-GP, LLC, the GP of Versant Ventures VI GP, L.P., the GP of Versant Venture Capital VI, L.P.
Date:06/12/2025
 
Versant Ventures VI GP, L.P.
 
Signature:/s/Max Eisenberg
Name/Title:Max Eisenberg/COO of Versant Ventures VI GP-GP, LLC, the General Partner of Versant Ventures VI GP, L.P.
Date:06/12/2025
 
Versant Ventures VI GP-GP, LLC
 
Signature:/s/Max Eisenberg
Name/Title:Max Eisenberg/COO
Date:06/12/2025
 
Versant Vantage II, L.P.
 
Signature:/s/Max Eisenberg
Name/Title:Max Eisenberg/COO of Versant Vantage II GP-GP, LLC, the GP of Versant Vantage II GP, L.P., the GP of Versant Vantage II, L.P.
Date:06/12/2025
 
Versant Vantage II GP, L.P.
 
Signature:/s/Max Eisenberg
Name/Title:Max Eisenberg/COO of Versant Vantage II GP-GP, LLC, the General Partner of Versant Vantage II GP, L.P.
Date:06/12/2025
 
Versant Vantage II GP-GP, LLC
 
Signature:/s/Max Eisenberg
Name/Title:Max Eisenberg/COO
Date:06/12/2025
 
Versant Venture Capital VII, L.P.
 
Signature:/s/Max Eisenberg
Name/Title:Max Eisenberg/COO of Versant Ventures VII GP-GP, LLC, the GP of Versant Ventures VII GP, L.P., the GP of Versant Venture Capital VII, L.P.
Date:06/12/2025
 
Versant Ventures VII GP, L.P.
 
Signature:/s/Max Eisenberg
Name/Title:Max Eisenberg/COO of Versant Ventures VII GP-GP, LLC, the General Partner of Versant Ventures VII GP, L.P.
Date:06/12/2025
 
Versant Ventures VII GP-GP, LLC
 
Signature:/s/Max Eisenberg
Name/Title:Max Eisenberg/COO
Date:06/12/2025