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Seaport Therapeutics, Inc. (SPTX)

Seaport Therapeutics, Inc. (SPTX) Insider Trading

Directors, officers and holders of more than 10% of SPTX report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 41 most recent of 41 transactions on file: 2 with code P, 0 with code S and 39 with other codes.

DateInsiderCodeShares
Jun 22, 2026HOMBACH ROBERT J.P Purchase13,000
May 4, 2026ARCH Venture Partners XII, LLCP Purchase1,100,000
May 4, 2026Loebel AntonyC Conversion20,109
May 4, 2026PAUL STEVEN MC Conversion210,526
May 4, 2026ARCH Venture Partners XII, LLCC Conversion2,513,686
May 4, 2026ARCH Venture Partners XII, LLCC Conversion2,681,265
May 4, 2026PureTech Health plcC Conversion12,736,014
May 4, 2026HEALY JAMESC Conversion1,927,159
May 4, 2026Loebel AntonyC Conversion63,157
May 4, 2026PureTech Health plcC Conversion2,681,265
May 4, 2026PureTech Health plcC Conversion40,000,000
May 4, 2026PureTech Health plcC Conversion8,421,052
May 4, 2026PureTech Health plcC Conversion3,031,578
May 4, 2026PureTech Health plcC Conversion965,255
May 4, 2026HEALY JAMESC Conversion804,379
May 4, 2026White LaurenC Conversion6,702
May 4, 2026HEALY JAMESC Conversion6,052,631
May 4, 2026HEALY JAMESC Conversion2,526,315
May 4, 2026Gladstein LanaC Conversion33,515
May 4, 2026White LaurenC Conversion21,052
May 4, 2026Chen Michael CunyuanC Conversion3,351
May 4, 2026Torres DeniceC Conversion13,406
May 4, 2026PAUL STEVEN MC Conversion67,031
May 4, 2026Gladstein LanaC Conversion105,263
May 4, 2026ARCH Venture Partners XII, LLCC Conversion2,513,686
May 4, 2026Chen Michael CunyuanC Conversion10,526
May 4, 2026Torres DeniceC Conversion42,105
May 4, 2026ARCH Venture Partners XII, LLCC Conversion2,681,265
Apr 30, 2026Loebel AntonyA Award63,680
Apr 30, 2026Zohar DaphneA Award271,813
Apr 30, 2026Zohar DaphneA Award1,486,786
Apr 30, 2026White LaurenA Award63,680
Apr 30, 2026Wheadon David E.A Award12,258
Apr 30, 2026PETERSON SANDRA EA Award12,258
Apr 30, 2026Gladstein LanaA Award63,680
Apr 30, 2026Chen Michael CunyuanA Award63,680
Apr 30, 2026Torres DeniceA Award12,258
Apr 30, 2026PAUL STEVEN MA Award12,258
Apr 30, 2026PAUL STEVEN MA Award991,192
Apr 30, 2026HOMBACH ROBERT J.A Award12,258
Apr 30, 2026Mates SharonA Award49,033

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.