SPTX on Nasdaq

Seaport Therapeutics, Inc.

American pharmaceutical preparations company based in Boston.

$17.57 up 0.89 (5.31%)Price as of Oct 15, 2026 at 17:33 UTC

Last updated Oct 18, 2026.

Overview

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  • TickerSPTX on Nasdaq
  • IndustryPharmaceutical Preparations
  • HeadquartersDE
  • Incorporated inDE3
  • Business address6 Tide Street, Suite 400, Boston, Ma 021103
  • Filer categoryNon-accelerated filer, Smaller reporting company, Emerging growth company3

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Leadership

Who has led Seaport Therapeutics, Inc., and when. Pick a name to see everywhere that person has worked.

Chief financial officer

  1. Lauren White2026–now
Board members and other officers (13)

Filings

55 filings to the SEC since October 2021: 2 quarterly reports, 3 major events, 32 insider forms, 6 large holders, 1 private raises, 11 other. The latest 20:

  1. Aug 14, 2026SCHEDULE 13G EDGAR
  2. Aug 5, 2026SCHEDULE 13G EDGAR
  3. Aug 5, 2026SCHEDULE 13G EDGAR
  4. Aug 3, 202610-Q EDGAR
  5. Aug 3, 20268-K EDGAR
  6. Jun 24, 20264 EDGAR
  7. Jun 8, 202610-Q EDGAR
  8. Jun 8, 20268-K EDGAR
  9. May 11, 2026SCHEDULE 13D EDGAR
  10. May 11, 2026SCHEDULE 13G EDGAR
  11. May 6, 20264 EDGAR
  12. May 6, 2026SCHEDULE 13D EDGAR
  13. May 6, 20263 OWNERSHIP DOCUMENT EDGAR
  14. May 6, 20263 OWNERSHIP DOCUMENT EDGAR
  15. May 4, 20264 EDGAR
  16. May 4, 20264 EDGAR
  17. May 4, 20264 EDGAR
  18. May 4, 20264 EDGAR
  19. May 4, 20264 EDGAR
  20. May 4, 20264 EDGAR

The 55 filings since October 2021 can be filtered by form type and year here when JavaScript is on.

Every filing from the last three years, summarized. The full record is on SEC EDGAR.

Insider trades and holders

Large holders

Investors who own more than 5% must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively. 6 such filings since October 2021:

  1. Aug 14, 2026SCHEDULE 13G
  2. Aug 5, 2026SCHEDULE 13G
  3. Aug 5, 2026SCHEDULE 13G
  4. May 11, 2026SCHEDULE 13D
  5. May 11, 2026SCHEDULE 13G
  6. May 6, 2026SCHEDULE 13D

From Forms 4 and Schedules 13D and 13G filed with the SEC.

Money raised

Private offerings the company reported to the SEC on Form D.

  1. Oct 18, 2024Raised $225.9 million in a private offering of equity Form D: $226 million offered in all Form D

Held by these funds

The largest holders among investment managers' 13F reports for the quarter ending Jun 30, 2026, the top 25 of 54. Change is in shares since the quarter before.

FundSharesValueShare of the fundChange
ARCH Venture Management, LLC6,294,951$136.6M12.4%New
General Atlantic, L.P.6,101,582$132.5M4.6%New
Sofinnova Investments, Inc.3,564,871$77.4M4.1%New
Goldman Sachs Group Inc2,178,642$47.3M0.0%New
Trv Gp Vi, LLC2,061,222$44.8M19.3%New
Canada Pension Plan Investment Board1,975,791$42.9M0.0%New
Jpmorgan Chase & Co1,815,845$40.9M0.0%New
Foresite Capital Management VI LLC1,779,521$38.7M6.0%New
Fmr LLC1,185,100$25.7M0.0%New
Bellevue Group AG1,100,000$23.9M0.5%New
Siren, L.L.C.1,095,316$23.8M0.5%New
Jennison Associates LLC1,079,669$23.5M0.0%New
Ra Capital Management, L.P.700,000$15.2M0.1%New
Vanguard Capital Management LLC599,217$13.0M0.0%New
Woodline Partners LP586,345$12.7M0.0%New
Perceptive Advisors LLC500,000$10.9M0.2%New
Braidwell LP500,000$10.9M0.4%New
Principal Financial Group Inc414,672$9.0M0.0%New
Aberdeen Group plc310,355$6.7M0.0%New
UBS Group AG279,184$6.1M0.0%New
BlackRock, Inc.229,863$5.0M0.0%New
Seven Grand Managers, LLC225,000$4.9M0.2%New
Citadel Advisors LLC191,144$4.2M0.0%New
Geode Capital Management, LLC175,866$3.8M0.0%New
Pier Capital, LLC169,985$3.7M0.5%New

13F reports cover disclosed long positions in U.S. stocks only.

Sources

The numbers on this page point here. Each one links to the record it came from.

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