Company · Ownership research

Adaptive Biotechnologies Corp ADPT

CIK 0001478320 · CUSIP 00650F109

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 00650F109 (ADPT), not CUSIP 00650F909 (ADPT), CUSIP 00650F959 (ADPT), and does not merge CUSIPs.

This page lists the top 20 of 298 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

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	VIKING GLOBAL INVESTORS LP CIK 1103804 · View history	$416.31M 29,993,708 shares	1.16%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
02	BlackRock, Inc. CIK 2012383 · View history	$184.65M 13,303,025 shares	0.00%	-30.53K(-0.20%)Reduced	SEC filing ↗ May 13, 2026	▾
03	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$84.59M 6,094,144 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
04	WESTFIELD CAPITAL MANAGEMENT CO LP CIK 1177719 · View history	$75.46M 5,436,718 shares	0.32%	+1.38M(+33.90%)Added	SEC filing ↗ May 11, 2026	▾
05	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history	$62.34M 4,491,474 shares	0.00%	—	SEC filing ↗ May 8, 2026	▾
06	Invesco Ltd. CIK 914208 · Amended · View history	$61.77M 4,450,066 shares	0.01%	+1.34M(+43.20%)Added	SEC filing ↗ May 12, 2026	▾
07	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$53.54M 3,857,422 shares	0.01%	+1.69M(+78.10%)Added	SEC filing ↗ May 15, 2026	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$50.48M 3,636,054 shares	0.00%	+124.20K(+3.50%)Added	SEC filing ↗ May 15, 2026	▾
09	LORD, ABBETT & CO. LLC CIK 728100 · View history	$49.08M 3,536,103 shares	0.16%	+455.34K(+14.80%)Added	SEC filing ↗ May 14, 2026	▾
10	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$45.00M 3,242,077 shares	0.01%	+339.81K(+11.70%)Added	SEC filing ↗ May 15, 2026	▾
11	STATE STREET CORP CIK 93751 · View history	$44.79M 3,227,245 shares	0.00%	+45.60K(+1.40%)Added	SEC filing ↗ May 15, 2026	▾
12	AMERIPRISE FINANCIAL INC CIK 820027 · Amended · View history	$41.88M 3,017,341 shares	0.01%	+426.36K(+16.50%)Added	SEC filing ↗ Jul 17, 2026	▾
13	BNP PARIBAS ASSET MANAGEMENT Holding S.A. CIK 1520354 · View history	$37.31M 2,688,081 shares	0.04%	+2.69MNew	SEC filing ↗ May 14, 2026	▾
14	ARK Investment Management LLC CIK 1697748 · View history	$29.05M 2,092,969 shares	0.23%	-45.99K(-2.20%)Reduced	SEC filing ↗ May 12, 2026	▾
15	FRED ALGER MANAGEMENT, LLC CIK 3520 · View history	$28.64M 2,063,146 shares	0.13%	-182.27K(-8.10%)Reduced	SEC filing ↗ May 15, 2026	▾
16	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 1164508 · View history	$27.69M 1,995,202 shares	0.01%	-426.89K(-17.60%)Reduced	SEC filing ↗ May 14, 2026	▾
17	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$27.28M 1,965,610 shares	0.02%	+62.92K(+3.30%)Added	SEC filing ↗ May 15, 2026	▾
18	NOMURA ASSET MANAGEMENT INTERNATIONAL INC. CIK 921739 · View history	$26.11M 1,881,183 shares	0.04%	-59.19K(-3.10%)Reduced	SEC filing ↗ May 15, 2026	▾
19	Driehaus Capital Management LLC CIK 938206 · View history	$24.30M 1,750,601 shares	0.18%	-1.01M(-36.60%)Reduced	SEC filing ↗ May 15, 2026	▾
20	Aristotle Atlantic Partners, LLC CIK 1697267 · View history	$23.80M 1,714,346 shares	1.11%	-128.10K(-7.00%)Reduced	SEC filing ↗ May 15, 2026	▾

Showing 20 / 298 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

298

Cancelled or null records excluded

Disclosed shares

151,935,375

Not deduplicated across managers

Disclosed value

$2.11B

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.

Adaptive Biotechnologies Corp · Q1 2026

Explore all 298 reporting institutions.

This page includes 20 of 298 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 298 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":"00650F109","quarter":"2026Q1","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.