ADPT US Equity

Adaptive Biotechnologies Corp

Nasdaq+ Compare

Health Care · Biological Products, (No Diagnostic Substances) · CIK 1478320 · FYE 1231

$22.52

-0.02 (-0.09%)

USD · as of 2026-07-28 · marketstack

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Institutional ownership· 13F filers holding ADPT · 2026-Q1 methodology → sources →

297 holders

% of shares outstanding held

94.9%

Shares held (13F)

151,849,552

Reporting holders

297

Top holders

largest 100 of 297 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	VIKING GLOBAL INVESTORS LPtracked	29,993,70830.0M	$416M	18.74%	—
2	BlackRock, Inc.	13,303,02513.3M	$185M	8.31%	—
3	VANGUARD CAPITAL MANAGEMENT LLC	6,094,1446.1M	$85M	3.81%	NEW†
4	WESTFIELD CAPITAL MANAGEMENT CO LP	5,436,7185.4M	$75M	3.40%	ADD 34%
5	VANGUARD PORTFOLIO MANAGEMENT LLC	4,491,4744.5M	$62M	2.81%	NEW†
6	Invesco Ltd.	4,450,0664.5M	$62M	2.78%	ADD 43%
7	WELLINGTON MANAGEMENT GROUP LLP	3,857,4223.9M	$54M	2.41%	ADD 78%
8	GEODE CAPITAL MANAGEMENT, LLC	3,636,0543.6M	$50M	2.27%	ADD 4%
9	LORD, ABBETT & CO. LLC	3,536,1033.5M	$49M	2.21%	ADD 15%
10	GOLDMAN SACHS GROUP INC	3,242,0773.2M	$45M	2.03%	ADD 12%
11	STATE STREET CORP	3,227,2453.2M	$45M	2.02%	—
12	AMERIPRISE FINANCIAL INC	3,017,3413.0M	$42M	1.89%	ADD 16%
13	BNP PARIBAS ASSET MANAGEMENT Holding S.A.	2,688,0812.7M	$37M	1.68%	NEW
14	ARK Investment Management LLC	2,092,9692.1M	$29M	1.31%	TRIM -2%
15	FRED ALGER MANAGEMENT, LLC	2,063,1462.1M	$29M	1.29%	TRIM -8%
16	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	1,995,2022.0M	$28M	1.25%	TRIM -18%
17	D. E. Shaw & Co., Inc.	1,965,6102.0M	$27M	1.23%	ADD 3%
18	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	1,881,1831.9M	$26M	1.18%	TRIM -3%
19	Driehaus Capital Management LLC	1,750,6011.8M	$24M	1.09%	TRIM -37%
20	Aristotle Atlantic Partners, LLC	1,714,3461.7M	$24M	1.07%	TRIM -7%
21	PRINCIPAL FINANCIAL GROUP INC	1,704,8871.7M	$24M	1.07%	ADD 10%
22	Sumitomo Mitsui Trust Group, Inc.	1,595,3701.6M	$22M	1.00%	TRIM -18%
23	Amova Asset Management Americas, Inc.	1,595,3701.6M	$22M	1.00%	TRIM -18%
24	PRICE T ROWE ASSOCIATES INC /MD/	1,566,2131.6M	$22M	0.98%	TRIM -64%
25	NORTHERN TRUST CORP	1,392,3321.4M	$19M	0.87%	ADD 19%
26	Divisadero Street Capital Management, LP	1,318,6611.3M	$18M	0.82%	ADD 265%
27	Nuveen, LLC	1,304,1601.3M	$18M	0.81%	ADD 66%
28	Capricorn Fund Managers Ltd	1,291,7731.3M	$18M	0.81%	NEW
29	BANK OF AMERICA CORP /DE/	1,227,9171.2M	$17M	0.77%	ADD 52%
30	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	1,145,6821.1M	$16M	0.72%	TRIM -2%
31	MILLENNIUM MANAGEMENT LLC	1,081,3661.1M	$15M	0.68%	ADD 5791%
32	MASSACHUSETTS FINANCIAL SERVICES CO /MA/	1,072,3311.1M	$15M	0.67%	ADD 16%
33	Aberdeen Group plc	1,070,6271.1M	$15M	0.67%	ADD 2%
34	Point72 Asset Management, L.P.	1,021,8081.0M	$14M	0.64%	ADD 403%
35	Blue Water Life Science Advisors, LP	1,010,1451.0M	$14M	0.63%	TRIM -43%
36	MORGAN STANLEY	967,120967,120	$13M	0.60%	TRIM -16%
37	KENNEDY CAPITAL MANAGEMENT LLC	931,522931,522	$13M	0.58%	ADD 3%
38	T. Rowe Price Investment Management, Inc.	919,278919,278	$13M	0.57%	ADD 14594%
39	VANGUARD FIDUCIARY TRUST CO	870,959870,959	$12M	0.54%	NEW
40	OBERWEIS ASSET MANAGEMENT INC/	806,951806,951	$11M	0.50%	ADD 8%
41	TUDOR INVESTMENT CORP ET AL	786,281786,281	$11M	0.49%	ADD 42%
42	DEUTSCHE BANK AG\	785,783785,783	$11M	0.49%	TRIM -55%
43	JENNISON ASSOCIATES LLC	753,073753,073	$10M	0.47%	TRIM -72%
44	Catalio Capital Management, LP	722,784722,784	$10M	0.45%	TRIM -12%
45	Rhenman & Partners Asset Management AB	720,000720,000	$10M	0.45%	ADD 19%
46	JANE STREET GROUP, LLC	682,182682,182	$9M	0.43%	NEW
47	Connor, Clark & Lunn Investment Management Ltd.	649,627649,627	$9M	0.41%	ADD 10%
48	Qube Research & Technologies Ltd	639,377639,377	$9M	0.40%	TRIM -30%
49	Hillsdale Investment Management Inc.	625,217625,217	$9M	0.39%	—
50	Trexquant Investment LP	571,584571,584	$8M	0.36%	ADD 117%
51	FMR LLC	567,032567,032	$8M	0.35%	ADD 47%
52	SEI INVESTMENTS CO	560,554560,554	$8M	0.35%	ADD 77%
53	ExodusPoint Capital Management, LP	555,020555,020	$8M	0.35%	NEW
54	FIRST TRUST ADVISORS LP	554,584554,584	$8M	0.35%	ADD 3%
55	Parkman Healthcare Partners LLC	551,815551,815	$8M	0.34%	ADD 37%
56	PANAGORA ASSET MANAGEMENT INC	515,926515,926	$7M	0.32%	ADD 213%
57	NEXT CENTURY GROWTH INVESTORS LLC	504,346504,346	$7M	0.32%	TRIM -47%
58	Granite Investment Partners, LLC	500,061500,061	$7M	0.31%	NEW
59	ESSEX INVESTMENT MANAGEMENT CO LLC	493,403493,403	$7M	0.31%	TRIM -21%
60	PEREGRINE CAPITAL MANAGEMENT LLC	486,641486,641	$7M	0.30%	ADD 8%
61	AQR CAPITAL MANAGEMENT LLC	485,233485,233	$7M	0.30%	ADD 4%
62	Cerity Partners LLC	445,588445,588	$6M	0.28%	TRIM -13%
63	Bank of New York Mellon Corp	401,901401,901	$6M	0.25%	TRIM -3%
64	VICTORY CAPITAL MANAGEMENT INC	390,855390,855	$5M	0.24%	TRIM -20%
65	RAYMOND JAMES FINANCIAL INC	382,295382,295	$5M	0.24%	ADD 17%
66	Allianz Asset Management GmbH	379,805379,805	$5M	0.24%	ADD 17%
67	PBU - The Pension Fund of Early Childhood & Youth Educators	378,069378,069	$5M	0.24%	TRIM -77%
68	Susquehanna Portfolio Strategies, LLC	374,269374,269	$5M	0.23%	ADD 63%
69	CITADEL ADVISORS LLC	363,333363,333	$5M	0.23%	ADD 538%
70	ALGERT GLOBAL LLC	362,710362,710	$5M	0.23%	TRIM -59%
71	PRUDENTIAL FINANCIAL INC	359,100359,100	$5M	0.22%	TRIM -20%
72	Legal & General Group Plc	324,605324,605	$5M	0.20%	TRIM -10%
73	AFFINITY WEALTH MANAGEMENT LLC	323,153323,153	$4M	0.20%	ADD 3%
74	SummitTX Capital, L.P.	317,624317,624	$4M	0.20%	NEW
75	Counterpoint Mutual Funds LLC	307,268307,268	$4M	0.19%	NEW
76	1492 Capital Management LLC	281,096281,096	$4M	0.18%	ADD 208%
77	Russell Investments Group, Ltd.	274,416274,416	$4M	0.17%	TRIM -39%
78	Schonfeld Strategic Advisors LLC	262,199262,199	$4M	0.16%	ADD 137%
79	Man Group plc	245,944245,944	$3M	0.15%	ADD 16%
80	JPMORGAN CHASE & CO	259,176259,176	$3M	0.16%	TRIM -2%
81	RENAISSANCE TECHNOLOGIES LLC	239,800239,800	$3M	0.15%	NEW
82	UBS Group AG	225,986225,986	$3M	0.14%	TRIM -56%
83	Swiss National Bank	225,200225,200	$3M	0.14%	—
84	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	222,524222,524	$3M	0.14%	ADD 10%
85	Aquatic Capital Management LLC	194,503194,503	$3M	0.12%	ADD 58%
86	DIMENSIONAL FUND ADVISORS LP	188,338188,338	$3M	0.12%	TRIM -86%
87	RHUMBLINE ADVISERS	182,872182,872	$3M	0.11%	—
88	Knights of Columbus Asset Advisors LLC	180,871180,871	$3M	0.11%	ADD 32%
89	FRANKLIN RESOURCES INC	174,330174,330	$2M	0.11%	TRIM -38%
90	Brevan Howard Capital Management LP	170,928170,928	$2M	0.11%	TRIM -54%
91	SUSQUEHANNA INTERNATIONAL GROUP, LLP	157,817157,817	$2M	0.10%	ADD 329%
92	PERCEPTIVE ADVISORS LLC	152,500152,500	$2M	0.10%	NEW
93	Legato Capital Management LLC	152,339152,339	$2M	0.10%	TRIM -36%
94	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	143,658143,658	$2M	0.09%	ADD 28%
95	ALLIANCEBERNSTEIN L.P.	121,228121,228	$2M	0.08%	TRIM -24%
96	SG Americas Securities, LLC	137,758137,758	$2M	0.09%	ADD 38%
97	NEW YORK STATE COMMON RETIREMENT FUND	136,731136,731	$2M	0.09%	ADD 53%
98	BLAIR WILLIAM & CO/IL	136,089136,089	$2M	0.09%	ADD 57%
99	OSAIC HOLDINGS, INC.	135,994135,994	$2M	0.08%	ADD 9%
100	HRT FINANCIAL LP	131,241131,241	$2M	0.08%	ADD 6%

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

VIKING GLOBAL INVESTORS LPtracked

30.0M

$416M

BlackRock, Inc.

12.1M

12.2M

13.7M

13.4M

13.3M

$185M

VANGUARD CAPITAL MANAGEMENT LLC

—

6.1M

$85M

WESTFIELD CAPITAL MANAGEMENT CO LP

—

4.1M

5.4M

$75M

VANGUARD PORTFOLIO MANAGEMENT LLC

—

4.5M

$62M

Invesco Ltd.

174K

553K

908K

891K

3.1M

4.5M

$62M

WELLINGTON MANAGEMENT GROUP LLP

—

501K

2.2M

3.9M

$54M

GEODE CAPITAL MANAGEMENT, LLC

2.7M

2.8M

3.2M

3.4M

3.5M

3.6M

$50M

LORD, ABBETT & CO. LLC

—

1.0M

1.2M

3.1M

3.5M

$49M

GOLDMAN SACHS GROUP INC

2.2M

2.0M

1.9M

2.9M

3.2M

$45M

STATE STREET CORP

2.7M

3.0M

3.1M

3.2M

$45M

AMERIPRISE FINANCIAL INC

737K

6.6M

3.2M

6.0M

2.6M

3.0M

$42M

BNP PARIBAS ASSET MANAGEMENT Holding S.A.

—

2.7M

$37M

ARK Investment Management LLC

9.4M

7.7M

4.0M

3.2M

2.1M

$29M

FRED ALGER MANAGEMENT, LLC

—

2.4M

2.5M

2.2M

2.1M

$29M

Shares reported each quarter by the largest current holders. Green = added vs the prior filing, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	297	151,849,552	94.9%	$2.1B
2025-Q4	284	150,364,232	94.0%	$2.4B
2025-Q3	271	145,659,699	91.0%	$2.2B
2025-Q2	242	148,636,087	92.9%	$1.7B
2025-Q1	225	154,918,473	96.8%	$1.2B
2024-Q4	207	143,283,867	89.5%	$859M
2024-Q3	187	143,993,886	90.0%	$737M
2024-Q2	176	149,567,960

Short interest has its own tab now — open SI →

Source: SEC Form 13F — every institution manager (≥ $100M in 13F securities) reporting a long US-listed position, across ~10,250 filers over 10 years of history. 13F is long-only, US-listed, filed up to 45 days after quarter-end.

Activists & large holders· Schedule 13D/G beneficial owners · ADPT

Large holders — 13G, passive (top 5 of 8 by % of class)

Holder

% of class

Type

As of

VIKING GLOBAL INVESTORS LP

18.8%

Exempt

2026-03-31

SEC →

BlackRock, Inc.

7.9%

QII

2025-12-31

SEC →

Nikko Asset Management Americas, Inc.

4.63%

QII

2024-12-31

SEC →

Sumitomo Mitsui Trust Group, Inc.

4.6%

QII

2024-12-31

SEC →

INTEGRATED CORE STRATEGIES (US) LLC

4.3%

Passive

Institutional ownership· 13F filers holding ADPT · 2026-Q1 methodology → sources →

297 holders

% of shares outstanding held

94.9%

Shares held (13F)

151,849,552

Reporting holders

297

Top holders

largest 100 of 297 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	VIKING GLOBAL INVESTORS LPtracked	29,993,70830.0M	$416M	18.74%	—
2	BlackRock, Inc.	13,303,02513.3M	$185M	8.31%	—
3	VANGUARD CAPITAL MANAGEMENT LLC	6,094,1446.1M	$85M	3.81%	NEW†
4	WESTFIELD CAPITAL MANAGEMENT CO LP	5,436,7185.4M	$75M	3.40%	ADD 34%
5	VANGUARD PORTFOLIO MANAGEMENT LLC	4,491,4744.5M	$62M	2.81%	NEW†
6	Invesco Ltd.	4,450,0664.5M	$62M	2.78%	ADD 43%
7	WELLINGTON MANAGEMENT GROUP LLP	3,857,4223.9M	$54M	2.41%	ADD 78%
8	GEODE CAPITAL MANAGEMENT, LLC	3,636,0543.6M	$50M	2.27%	ADD 4%
9	LORD, ABBETT & CO. LLC	3,536,1033.5M	$49M	2.21%	ADD 15%
10	GOLDMAN SACHS GROUP INC	3,242,0773.2M	$45M	2.03%	ADD 12%
11	STATE STREET CORP	3,227,2453.2M	$45M	2.02%	—
12	AMERIPRISE FINANCIAL INC	3,017,3413.0M	$42M	1.89%	ADD 16%
13	BNP PARIBAS ASSET MANAGEMENT Holding S.A.	2,688,0812.7M	$37M	1.68%	NEW
14	ARK Investment Management LLC	2,092,9692.1M	$29M	1.31%	TRIM -2%
15	FRED ALGER MANAGEMENT, LLC	2,063,1462.1M	$29M	1.29%	TRIM -8%
16	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	1,995,2022.0M	$28M	1.25%	TRIM -18%
17	D. E. Shaw & Co., Inc.	1,965,6102.0M	$27M	1.23%	ADD 3%
18	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	1,881,1831.9M	$26M	1.18%	TRIM -3%
19	Driehaus Capital Management LLC	1,750,6011.8M	$24M	1.09%	TRIM -37%
20	Aristotle Atlantic Partners, LLC	1,714,3461.7M	$24M	1.07%	TRIM -7%
21	PRINCIPAL FINANCIAL GROUP INC	1,704,8871.7M	$24M	1.07%	ADD 10%
22	Sumitomo Mitsui Trust Group, Inc.	1,595,3701.6M	$22M	1.00%	TRIM -18%
23	Amova Asset Management Americas, Inc.	1,595,3701.6M	$22M	1.00%	TRIM -18%
24	PRICE T ROWE ASSOCIATES INC /MD/	1,566,2131.6M	$22M	0.98%	TRIM -64%
25	NORTHERN TRUST CORP	1,392,3321.4M	$19M	0.87%	ADD 19%
26	Divisadero Street Capital Management, LP	1,318,6611.3M	$18M	0.82%	ADD 265%
27	Nuveen, LLC	1,304,1601.3M	$18M	0.81%	ADD 66%
28	Capricorn Fund Managers Ltd	1,291,7731.3M	$18M	0.81%	NEW
29	BANK OF AMERICA CORP /DE/	1,227,9171.2M	$17M	0.77%	ADD 52%
30	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	1,145,6821.1M	$16M	0.72%	TRIM -2%
31	MILLENNIUM MANAGEMENT LLC	1,081,3661.1M	$15M	0.68%	ADD 5791%
32	MASSACHUSETTS FINANCIAL SERVICES CO /MA/	1,072,3311.1M	$15M	0.67%	ADD 16%
33	Aberdeen Group plc	1,070,6271.1M	$15M	0.67%	ADD 2%
34	Point72 Asset Management, L.P.	1,021,8081.0M	$14M	0.64%	ADD 403%
35	Blue Water Life Science Advisors, LP	1,010,1451.0M	$14M	0.63%	TRIM -43%
36	MORGAN STANLEY	967,120967,120	$13M	0.60%	TRIM -16%
37	KENNEDY CAPITAL MANAGEMENT LLC	931,522931,522	$13M	0.58%	ADD 3%
38	T. Rowe Price Investment Management, Inc.	919,278919,278	$13M	0.57%	ADD 14594%
39	VANGUARD FIDUCIARY TRUST CO	870,959870,959	$12M	0.54%	NEW
40	OBERWEIS ASSET MANAGEMENT INC/	806,951806,951	$11M	0.50%	ADD 8%
41	TUDOR INVESTMENT CORP ET AL	786,281786,281	$11M	0.49%	ADD 42%
42	DEUTSCHE BANK AG\	785,783785,783	$11M	0.49%	TRIM -55%
43	JENNISON ASSOCIATES LLC	753,073753,073	$10M	0.47%	TRIM -72%
44	Catalio Capital Management, LP	722,784722,784	$10M	0.45%	TRIM -12%
45	Rhenman & Partners Asset Management AB	720,000720,000	$10M	0.45%	ADD 19%
46	JANE STREET GROUP, LLC	682,182682,182	$9M	0.43%	NEW
47	Connor, Clark & Lunn Investment Management Ltd.	649,627649,627	$9M	0.41%	ADD 10%
48	Qube Research & Technologies Ltd	639,377639,377	$9M	0.40%	TRIM -30%
49	Hillsdale Investment Management Inc.	625,217625,217	$9M	0.39%	—
50	Trexquant Investment LP	571,584571,584	$8M	0.36%	ADD 117%
51	FMR LLC	567,032567,032	$8M	0.35%	ADD 47%
52	SEI INVESTMENTS CO	560,554560,554	$8M	0.35%	ADD 77%
53	ExodusPoint Capital Management, LP	555,020555,020	$8M	0.35%	NEW
54	FIRST TRUST ADVISORS LP	554,584554,584	$8M	0.35%	ADD 3%
55	Parkman Healthcare Partners LLC	551,815551,815	$8M	0.34%	ADD 37%
56	PANAGORA ASSET MANAGEMENT INC	515,926515,926	$7M	0.32%	ADD 213%
57	NEXT CENTURY GROWTH INVESTORS LLC	504,346504,346	$7M	0.32%	TRIM -47%
58	Granite Investment Partners, LLC	500,061500,061	$7M	0.31%	NEW
59	ESSEX INVESTMENT MANAGEMENT CO LLC	493,403493,403	$7M	0.31%	TRIM -21%
60	PEREGRINE CAPITAL MANAGEMENT LLC	486,641486,641	$7M	0.30%	ADD 8%
61	AQR CAPITAL MANAGEMENT LLC	485,233485,233	$7M	0.30%	ADD 4%
62	Cerity Partners LLC	445,588445,588	$6M	0.28%	TRIM -13%
63	Bank of New York Mellon Corp	401,901401,901	$6M	0.25%	TRIM -3%
64	VICTORY CAPITAL MANAGEMENT INC	390,855390,855	$5M	0.24%	TRIM -20%
65	RAYMOND JAMES FINANCIAL INC	382,295382,295	$5M	0.24%	ADD 17%
66	Allianz Asset Management GmbH	379,805379,805	$5M	0.24%	ADD 17%
67	PBU - The Pension Fund of Early Childhood & Youth Educators	378,069378,069	$5M	0.24%	TRIM -77%
68	Susquehanna Portfolio Strategies, LLC	374,269374,269	$5M	0.23%	ADD 63%
69	CITADEL ADVISORS LLC	363,333363,333	$5M	0.23%	ADD 538%
70	ALGERT GLOBAL LLC	362,710362,710	$5M	0.23%	TRIM -59%
71	PRUDENTIAL FINANCIAL INC	359,100359,100	$5M	0.22%	TRIM -20%
72	Legal & General Group Plc	324,605324,605	$5M	0.20%	TRIM -10%
73	AFFINITY WEALTH MANAGEMENT LLC	323,153323,153	$4M	0.20%	ADD 3%
74	SummitTX Capital, L.P.	317,624317,624	$4M	0.20%	NEW
75	Counterpoint Mutual Funds LLC	307,268307,268	$4M	0.19%	NEW
76	1492 Capital Management LLC	281,096281,096	$4M	0.18%	ADD 208%
77	Russell Investments Group, Ltd.	274,416274,416	$4M	0.17%	TRIM -39%
78	Schonfeld Strategic Advisors LLC	262,199262,199	$4M	0.16%	ADD 137%
79	Man Group plc	245,944245,944	$3M	0.15%	ADD 16%
80	JPMORGAN CHASE & CO	259,176259,176	$3M	0.16%	TRIM -2%
81	RENAISSANCE TECHNOLOGIES LLC	239,800239,800	$3M	0.15%	NEW
82	UBS Group AG	225,986225,986	$3M	0.14%	TRIM -56%
83	Swiss National Bank	225,200225,200	$3M	0.14%	—
84	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	222,524222,524	$3M	0.14%	ADD 10%
85	Aquatic Capital Management LLC	194,503194,503	$3M	0.12%	ADD 58%
86	DIMENSIONAL FUND ADVISORS LP	188,338188,338	$3M	0.12%	TRIM -86%
87	RHUMBLINE ADVISERS	182,872182,872	$3M	0.11%	—
88	Knights of Columbus Asset Advisors LLC	180,871180,871	$3M	0.11%	ADD 32%
89	FRANKLIN RESOURCES INC	174,330174,330	$2M	0.11%	TRIM -38%
90	Brevan Howard Capital Management LP	170,928170,928	$2M	0.11%	TRIM -54%
91	SUSQUEHANNA INTERNATIONAL GROUP, LLP	157,817157,817	$2M	0.10%	ADD 329%
92	PERCEPTIVE ADVISORS LLC	152,500152,500	$2M	0.10%	NEW
93	Legato Capital Management LLC	152,339152,339	$2M	0.10%	TRIM -36%
94	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	143,658143,658	$2M	0.09%	ADD 28%
95	ALLIANCEBERNSTEIN L.P.	121,228121,228	$2M	0.08%	TRIM -24%
96	SG Americas Securities, LLC	137,758137,758	$2M	0.09%	ADD 38%
97	NEW YORK STATE COMMON RETIREMENT FUND	136,731136,731	$2M	0.09%	ADD 53%
98	BLAIR WILLIAM & CO/IL	136,089136,089	$2M	0.09%	ADD 57%
99	OSAIC HOLDINGS, INC.	135,994135,994	$2M	0.08%	ADD 9%
100	HRT FINANCIAL LP	131,241131,241	$2M	0.08%	ADD 6%

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

VIKING GLOBAL INVESTORS LPtracked

30.0M

$416M

BlackRock, Inc.

12.1M

12.2M

13.7M

13.4M

13.3M

$185M

VANGUARD CAPITAL MANAGEMENT LLC

—

6.1M

$85M

WESTFIELD CAPITAL MANAGEMENT CO LP

—

4.1M

5.4M

$75M

VANGUARD PORTFOLIO MANAGEMENT LLC

—

4.5M

$62M

Invesco Ltd.

174K

553K

908K

891K

3.1M

4.5M

$62M

WELLINGTON MANAGEMENT GROUP LLP

—

501K

2.2M

3.9M

$54M

GEODE CAPITAL MANAGEMENT, LLC

2.7M

2.8M

3.2M

3.4M

3.5M

3.6M

$50M

LORD, ABBETT & CO. LLC

—

1.0M

1.2M

3.1M

3.5M

$49M

GOLDMAN SACHS GROUP INC

2.2M

2.0M

1.9M

2.9M

3.2M

$45M

STATE STREET CORP

2.7M

3.0M

3.1M

3.2M

$45M

AMERIPRISE FINANCIAL INC

737K

6.6M

3.2M

6.0M

2.6M

3.0M

$42M

BNP PARIBAS ASSET MANAGEMENT Holding S.A.

—

2.7M

$37M

ARK Investment Management LLC

9.4M

7.7M

4.0M

3.2M

2.1M

$29M

FRED ALGER MANAGEMENT, LLC

—

2.4M

2.5M

2.2M

2.1M

$29M

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	297	151,849,552	94.9%	$2.1B
2025-Q4	284	150,364,232	94.0%	$2.4B
2025-Q3	271	145,659,699	91.0%	$2.2B
2025-Q2	242	148,636,087	92.9%	$1.7B
2025-Q1	225	154,918,473	96.8%	$1.2B
2024-Q4	207	143,283,867	89.5%	$859M
2024-Q3	187	143,993,886	90.0%	$737M
2024-Q2	176	149,567,960

Short interest has its own tab now — open SI →

Activists & large holders· Schedule 13D/G beneficial owners · ADPT

Large holders — 13G, passive (top 5 of 8 by % of class)

Holder

% of class

Type

As of

VIKING GLOBAL INVESTORS LP

18.8%

Exempt

2026-03-31

SEC →

BlackRock, Inc.

7.9%

QII

2025-12-31

SEC →

Nikko Asset Management Americas, Inc.

4.63%

QII

2024-12-31

SEC →

Sumitomo Mitsui Trust Group, Inc.

4.6%

QII

2024-12-31

SEC →

INTEGRATED CORE STRATEGIES (US) LLC

4.3%

Passive

ADPT US Equity☆

Institutional ownership· 13F filers holding ADPT · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · ADPT

Institutional ownership· 13F filers holding ADPT · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · ADPT

ADPT US Equity