Company · Ownership research

Seaport Therapeutics, Inc. SPTX

CIK 0002042347 · CUSIP 81221K108

Insider tradingInitial holdingsInstitutional holders

Quarter-end disclosures, not live holdings.

This page lists the top 20 of 27 rows by value; the complete set is available through the API.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	FMR LLC CIK 315066 · View history	$37.07M 1,837,672 shares	0.00%	+652.57K(+55.10%)Added	SEC filing ↗ Nov 10, 2026	▾
02	JPMORGAN CHASE & CO CIK 19617 · View history	$29.84M 1,596,602 shares	0.00%	-219.24K(-12.10%)Reduced	SEC filing ↗ Nov 12, 2026	▾
03	Siren, L.L.C. CIK 2005245 · View history	$22.09M 1,095,316 shares	0.52%	0(0.00%)Unchanged	SEC filing ↗ Nov 12, 2026	▾
04	PRINCIPAL FINANCIAL GROUP INC CIK 1126328 · View history	$7.61M 377,391 shares	0.00%	-37.28K(-9.00%)Reduced	SEC filing ↗ Nov 2, 2026	▾
05	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$7.61M 377,231 shares	0.00%	+201.37K(+114.50%)Added	SEC filing ↗ Nov 6, 2026	▾
06	Aberdeen Group plc CIK 1716774 · Amended · View history	$6.02M 298,537 shares	0.01%	-11.82K(-3.80%)Reduced	SEC filing ↗ Nov 10, 2026	▾
07	STATE STREET CORP CIK 93751 · View history	$5.06M 250,798 shares	0.00%	+184.15K(+276.30%)Added	SEC filing ↗ Nov 12, 2026	▾
08	AdvisorShares Investments LLC CIK 1425930 · View history	$1.90M 94,000 shares	0.24%	+94.00KNew	SEC filing ↗ Nov 9, 2026	▾
09	ALPS ADVISORS INC CIK 1376113 · View history	$1.43M 70,921 shares	0.01%	+16.59K(+30.50%)Added	SEC filing ↗ Nov 3, 2026	▾
10	Bank of New York Mellon Corp CIK 1390777 · View history	$594.79K 29,489 shares	0.00%	+29.49KNew	SEC filing ↗ Nov 5, 2026	▾
11	Nuveen, LLC CIK 1871926 · View history	$375.22K 18,603 shares	0.00%	+18.60KNew	SEC filing ↗ Nov 10, 2026	▾
12	HighTower Advisors, LLC CIK 1462245 · View history	$336.15K 16,666 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Nov 10, 2026	▾
13	Invesco Ltd. CIK 914208 · View history	$284.54K 14,107 shares	0.00%	+14.11KNew	SEC filing ↗ Nov 12, 2026	▾
14	UBS Group AG CIK 1610520 · View history	$251.38K 12,463 shares	0.00%	-266.72K(-95.50%)Reduced	SEC filing ↗ Nov 10, 2026	▾
15	DEUTSCHE BANK AG\ CIK 948046 · View history	$242.52K 12,024 shares	0.00%	+12.02KNew	SEC filing ↗ Nov 6, 2026	▾
16	RHUMBLINE ADVISERS CIK 1115418 · View history	$235.52K 11,677 shares	0.00%	+11.68KNew	SEC filing ↗ Nov 10, 2026	▾
17	CITIGROUP INC CIK 831001 · View history	$137.56K 6,820 shares	0.00%	+4.37K(+177.90%)Added	SEC filing ↗ Nov 4, 2026	▾
18	BARCLAYS PLC CIK 312069 · View history	$112.95K 5,600 shares	0.00%	+4.76K(+569.10%)Added	SEC filing ↗ Nov 6, 2026	▾
19	STRS OHIO CIK 820478 · View history	$76.65K 3,800 shares	0.00%	+3.80KNew	SEC filing ↗ Oct 30, 2026	▾
20	Police & Firemen's Retirement System of New Jersey CIK 2040686 · View history	$67.41K 3,342 shares	0.00%	+3.34KNew	SEC filing ↗ Nov 9, 2026	▾

Showing 20 / 27 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

6,140,215

Not deduplicated across managers

Disclosed value

$121.49M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Seaport Therapeutics, Inc. · Q3 2026

Explore all 27 reporting institutions.

This page includes 20 of 27 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

Download CSV
Earlier quarters
Advanced screening & filtering
API & AI access

Already have an account?

＋ New accounts get free API credits to explore data beyond ownership filings.

For AI agents & developers

The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 27 reporting institutions; totals use the complete disclosed data.

Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.

MCP  https://api.akkrudata.ai/mcp

akkru_institutional_holdings
{"action":"holders","cusip":"81221K108","quarter":"2026Q3","type":"positions","page_size":100}

Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.

MCP endpoint: https://api.akkrudata.ai/mcp
API / MCP / CLI documentation: /documents
llms.txt: /llms.txt

Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.