Seaport Therapeutics, Inc.

SPTXNASDAQ

$18.50+0.08 (+0.43% today)

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

Seaport Therapeutics, Inc. price and activity chart data

Showing the 1Y range: May 1, 2026 to Oct 5, 2026. Price (-6.8%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
ARCH Venture Management, LLC	11.76%	$137M	12.42%	New Not reported
General Atlantic, L.P.	11.40%	$133M	4.56%	New Not reported
Sofinnova Investments, Inc.	6.66%	$77.4M	4.00%	New Not reported
Goldman Sachs Group Inc	4.07%	$47.3M	0.00%	Not reported
TRV GP VI, LLC	3.85%	$44.8M	19.27%	New Not reported
Canada Pension Plan Investment Board	3.69%	$42.9M	0.02%	New Not reported
JPMorgan Chase & Co	3.39%	$40.9M	0.00%	Not reported
Foresite Capital Management VI LLC	3.32%	$38.7M	6.02%	New Not reported
FMR LLC	2.21%	$25.7M	0.00%	Not reported
Bellevue Group AG	2.05%	$23.9M	0.50%	New Not reported
Siren, L.L.C.	2.05%	$23.8M	0.48%	New Not reported
Jennison Associates LLC	2.02%	$23.5M	0.01%	New Not reported
Ra Capital Management, L.P.	1.31%	$15.2M	0.13%	New Not reported
Vanguard Capital Management LLC	1.12%	$13M	0.00%	Not reported
Woodline Partners LP	1.10%	$12.7M	0.04%	Not reported
Perceptive Advisors LLC	0.93%	$10.9M	0.16%	New Not reported
Braidwell LP	0.93%	$10.9M	0.40%	New Not reported
Principal Financial Group Inc	0.77%	$9.01M	0.00%	Not reported
Aberdeen Group plc	0.58%	$6.74M	0.01%	New Not reported
UBS Group AG	0.52%	$6.06M	0.00%	Not reported
BlackRock, Inc.	0.43%	$4.99M	0.00%	Not reported
Seven Grand Managers, LLC	0.42%	$4.89M	0.20%	New Not reported
Citadel Advisors LLC	0.36%	$4.15M	0.00%	Not reported
Geode Capital Management, LLC	0.33%	$3.82M	0.00%	Not reported
Pier Capital, LLC	0.32%	$3.69M	0.49%	New Not reported
Ameriprise Financial Inc	0.25%	$2.86M	0.00%	Not reported
Charles Schwab Investment Management Inc	0.18%	$2.12M	0.00%	Not reported
Vanguard Fiduciary Trust Co	0.16%	$1.91M	0.00%	Not reported
Pentwater Capital Management LP	0.16%	$1.8M	0.01%	New Not reported
Manufacturers Life Insurance Company, the	0.15%	$1.79M	0.00%	Not reported
Alyeska Investment Group, L.P.	0.14%	$1.63M	0.00%	Not reported
Alps Advisors Inc	0.10%	$1.18M	0.01%	Not reported
Millennium Management LLC	0.08%	$985K	0.00%	Not reported
Gsa Capital Partners LLP	0.06%	$721K	0.05%	Not reported
DAFNA Capital Management LLC	0.06%	$704K	0.13%	New Not reported
Northern Trust Corp	0.06%	$691K	0.00%	Not reported
ADAR1 Capital Management, LLC	0.05%	$565K	0.03%	New Not reported
Ghisallo Capital Management LLC	0.05%	$543K	0.01%	Not reported
Burkehill Global Management, LP	0.05%	$543K	0.02%	New Not reported
Squarepoint Ops LLC	0.05%	$538K	0.00%	Not reported
HighTower Advisors, LLC	0.03%	$362K	0.00%	Not reported
Morgan Stanley	0.02%	$254K	0.00%	Not reported
XTX Topco Ltd	0.02%	$239K	0.00%	Not reported
Weiss Asset Management LP	0.02%	$217K	0.00%	New Not reported
Zimmer Partners, LP	0.02%	$217K	0.01%	Not reported
Vanguard Portfolio Management LLC	0.02%	$197K	0.00%	Not reported
Vanguard Global Advisers, LLC	0.01%	$155K	0.00%	Not reported
Citigroup Inc	0.00%	$53.3K	0.00%	Not reported
Jones Financial Companies LLLP	0.00%	$48.3K	0.00%	Not reported
Assetmark, Inc	0.00%	$31.1K	0.00%	New Not reported

50 of 52 holders

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