New insider Puretech Health Plc claimed ownership of 302,479 shares (SEC Form 3)
$PRTC
Biotechnology: Pharmaceutical Preparations
Health Care
| FORM 3 | UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940 |
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1. Name and Address of Reporting Person*
(Street)
(Country) | 2. Date of Event Requiring Statement
(Month/Day/Year) 04/30/2026 | 3. Issuer Name and Ticker or Trading Symbol
Seaport Therapeutics, Inc. [ SPTX ] | |||||||||||||||
| 3a. Foreign Trading Symbol
| 5. If Amendment, Date of Original Filed
(Month/Day/Year) | ||||||||||||||||
| 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
| 6. Individual or Joint/Group Filing (Check Applicable Line)
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| Table I - Non-Derivative Securities Beneficially Owned | |||
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| 1. Title of Security (Instr. 4) | 2. Amount of Securities Beneficially Owned (Instr. 4) | 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) | 4. Nature of Indirect Beneficial Ownership (Instr. 5) |
| Common Stock | 302,479 | I | See footnote(1) |
| Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) | |||||||
|---|---|---|---|---|---|---|---|
| 1. Title of Derivative Security (Instr. 4) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) | 4. Conversion or Exercise Price of Derivative Security | 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) | 6. Nature of Indirect Beneficial Ownership (Instr. 5) | ||
| Date Exercisable | Expiration Date | Title | Amount or Number of Shares | ||||
| Series A-1 Preferred Stock | (2) | (2) | Common Stock | 12,736,014 | (2) | I | See footnote(1) |
| Series A-2 Preferred Stock | (2) | (2) | Common Stock | 2,681,265 | (2) | I | See footnote(1) |
| Series B Preferred Stock | (2) | (2) | Common Stock | 965,255 | (2) | I | See footnote(1) |
1. Name and Address of Reporting Person*
(Street)
Relationship of Reporting Person(s) to Issuer
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1. Name and Address of Reporting Person*
(Street)
Relationship of Reporting Person(s) to Issuer
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| Explanation of Responses: |
| 1. PureTech LYT, Inc. is the record holder of all of the securities reported in this Form 3. PureTech Health LLC is the sole owner of PureTech LYT, Inc. PureTech Health plc is the sole member of PureTech Health LLC, and has the power to direct the voting and disposition of securities held by PureTech LYT, Inc. and PureTech Health LLC. |
| 2. The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering. |
| PureTech LYT, Inc., By: /s/ Robert Lyne | 04/30/2026 | |
| PureTech Health LLC, By: /s/ Robert Lyne | 04/30/2026 | |
| PureTech Health plc, By: /s/ Robert Lyne | 04/30/2026 | |
| ** Signature of Reporting Person | Date | |
| Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. | ||
| * If the form is filed by more than one reporting person, see Instruction 5 (b)(v). | ||
| ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a). | ||
| Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure. | ||
| Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number. | ||
| * Form 3: SEC 1473 (03-26) | ||