Polaris Founders Capital Fund I Ups Stake in Tectonic Therapeutic

TL;DR

**Polaris Founders Capital Fund I now owns 10.4% of Tectonic Therapeutic after filing an amended SC 13D.**

AI Summary

On June 25, 2024, Polaris Founders Capital Fund I, L.P., along with other Polaris entities and Jonathan Flint, reported a beneficial ownership stake in Tectonic Therapeutic, Inc. The filing indicates a change in ownership, with Polaris Founders Capital Fund I, L.P. now holding 1,800,000 shares of common stock, representing 10.4% of the outstanding shares. This filing is an amendment to a previous Schedule 13D.

Why It Matters

This filing signals a significant ownership change by a major investment fund in Tectonic Therapeutic, potentially influencing the company's strategic direction and stock performance.

Risk Assessment

Risk Level: medium — Changes in significant beneficial ownership can indicate shifts in investor confidence or strategic intentions, which may impact the company's stock price.

Key Numbers

• 1,800,000 — Shares Owned (Beneficial ownership by Polaris Founders Capital Fund I, L.P.)
• 10.4% — Ownership Percentage (Represents the stake held by Polaris Founders Capital Fund I, L.P.)

Key Players & Entities

• Polaris Founders Capital Fund I, L.P. (company) — Reporting entity with increased ownership
• Tectonic Therapeutic, Inc. (company) — Subject company
• Jonathan Flint (person) — Group member of reporting entity
• 1,800,000 (dollar_amount) — Number of shares beneficially owned
• 10.4% (dollar_amount) — Percentage of outstanding shares owned
• 20240625 (date) — Date of filing

FAQ

Key Financial Figures

• $0.0001 — INC. (Name of Issuer) Common Stock, $0.0001 par value (Title of Class of Securiti
• $12.39908 — nic Common Stock at a purchase price of $12.39908 per share subject to and immediately pr

Filing Documents

• d780356dsc13d.htm (SC 13D) — 158KB
• d780356dex991.htm (EX-99.1) — 11KB
• 0001193125-24-167893.txt ( ) — 172KB

From the Filing

SC 13D 1 d780356dsc13d.htm SC 13D SC 13D SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. ) TECTONIC THERAPEUTIC, INC. (Name of Issuer) Common Stock, $0.0001 par value (Title of Class of Securities) 878972108 (CUSIP Number) Lauren Crockett Polaris Partners One Marina Park Drive, 8th Floor Boston, MA 02210 (781) 290-0770 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) June 20, 2024 (Date of Event Which Requires Filing of this Statement) 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 remainder of this cover page shall be filled out for a reporting persons initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page. 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). (Continued on following pages) CUSIP No. 878972108 13D 1 NAMES OF REPORTING PERSONS Terrance McGuire 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a)(b) 3 SEC USE ONLY 4 SOURCE OF FUNDS (see instructions) AF 5 CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e) 6 CITIZENSHIP OR PLACE OF ORGANIZATION United States of America NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 7 SOLE VOTING POWER 0 8 SHARED VOTING POWER 1,157,976 shares of Common Stock (1) 9 SOLE DISPOSITIVE POWER 0 10 SHARED DISPOSITIVE POWER 1,157,976 shares of Common Stock (1) 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,157,976 shares of Common Stock (1) 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (see instructions) 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11 7.9% (2) 14 TYPE OF REPORTING PERSON (see instructions) IN (1) Consists of (i) 20,262 shares of Common Stock (as defined in Item 1 below) held by PFC I (as defined in Item 2(a) below), (ii) 64,652 shares of Common Stock held by PFC II (as defined in Item 2(a) below) and (iii) 1,073,062 shares of Common Stock held by PP IX (as defined in Item 2(a) below). The aggregate amount beneficially owned does not include 11,760 shares of Common Stock granted to Mr. McGuire in his capacity as a director of the Issuer because such shares are not exercisable as of the date of filing this Statement (as defined in Item 1 below) or within 60 days thereafter. PFCM I (as defined in Item 2(a) below) is the general partner of PFC I. Each of Mr. Flint and Mr. McGuire, a member of the Issuers (as defined in Item 1 below) board of directors, are managing members of PFCM I. Each of PFCM I, Mr. Flint and Mr. McGuire may be deemed to have shared voting, investment and dispositive power with respect to the shares held by PFC I. PFCM II (as defined in Item 2(a) below) is the general partner of PFC II. Each of Mr. Flint and Mr. McGuire, a member of the Issuers board of directors, are managing members of PFCM II. Each of PFCM II, Mr. Flint and Mr. McGuire may be deemed to have shared voting, investment and dispositive power with respect to the shares held by PFC II. PP GP IX (as defined in Item 2(a) below) is the general partner of PP IX. The PP GP IX Managing Members (as defined in Item 2(c) below) are the managing members of PP GP IX, and Mr. McGuire, a member of the Issuers board of directors, is an interest holder in PP GP IX. Each of PP GP IX, the PP GP IX Managing Members and Mr. McGuire may be deemed to have shared voting, investment and dispositive power with respect to the shares held by PP IX. (2) Based on 14,734,323 shares of Common Stock outstanding upon the Closing (as defined in Item 3 below) of the Business Combination (as defined in Item 3 below), as reported to the Reporting Persons (as defined in Item 2(a) below) by the Issuer. CUSIP No. 878972108 13D 1 NAMES OF REPORTING PERSONS Polaris Partners IX, L.P. 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a)(b) 3 SEC USE ONLY 4 SOURCE OF FUNDS (see instructions) WC 5 CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e) 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 7 SOLE VOTING POWER 0 8 SHARED VOTING POWER 1,073,062 shares of Common Stock (1) 9 SOLE DISPOSITIVE POWER

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View this SC 13D filing on SEC EDGAR