United States

Seaport Therapeutics Inc (SPTX)

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Seaport Therapeutics Inc has recorded no insider trading activity within the last ninety days. The most recent transactions occurred on June 22, 2026, involving a purchase by Robert J. Hombach. Prior to that, ARCH Venture Partners XII, LLC acquired shares on May 4, 2026. These historical acquisitions represent the latest documented movements by company insiders.
Ticker: SPTX
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Trades
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
2.9
HOMBACH ROBERT J. Non-Executive Director
Transaction date
Purchase
Price
83.22
Quantity 35,113 +39.2%
Value US$4,610,786
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-06-24 2026-06-22 B Purchase
2.9
HOMBACH ROBERT J.
Non-Executive Director
35,113 +39.2%
83.22
US$4,610,786 		35,113 +39.2% 83.22 US$4,610,786
2026-05-04 2026-05-04 B Purchase
3.7
ARCH Venture Partners XII, LLC
Large shareholder
93,492 -39.3%
106.87
US$4,295,092 		93,492 -39.3% 106.87 US$4,295,092
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