VIKING GLOBAL INVESTORS LP

Position in ADPT — Adaptive Biotechnologies Corp

CIK 1103804 STAMFORD, CT

Back to ADPT Full portfolio

Position in ADPT

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$416,312,667

-$70,785,150 QoQ

Shares Held

29,993,708

0.0% QoQ

Ownership

18.7%

of shares outstanding

% of Portfolio

1.19%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in ADPT Over Time

Shares Held

Position Value (USD)

Position in Diagnostics & Research

Healthcare · as of Mar 31, 2026

VIKING GLOBAL INVESTORS LP holds $1,610,371,378 across 3 Diagnostics & Research names. ADPT ranks #2 (25.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	TMO	Thermo Fisher Scientific Inc.	1,668,025	$819,884,328
2	ADPT	Adaptive Biotechnologies Corp This page	29,993,708	$416,312,667
3	WAT	Waters Corp /De/	1,256,462	$374,174,383

All Filings in ADPT

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25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$416,312,667	29,993,708	0.0%	Shares	Sole	2026-05-15
2025-12-31	$487,097,817	29,993,708	0.0%	Shares	Sole	2026-02-17
2025-09-30	$448,705,871	29,993,708	0.0%	Shares	Sole	2025-11-14
2025-06-30	$349,426,698	29,993,708	0.0%	Shares	Sole	2025-08-14
2025-03-31	$222,853,250	29,993,708	0.0%	Shares	Sole	2025-05-15
2024-12-31	$179,812,279	29,993,708	0.0%	Shares	Sole	2025-02-14
2024-09-30	$153,567,784	29,993,708	0.0%	Shares	Sole	2024-11-14
2024-06-30	$108,577,222	29,993,708	0.0%	Shares	Sole	2024-08-14
2024-03-31	$96,279,802	29,993,708	0.0%	Shares	Sole	2024-05-15
2023-12-31	$146,969,169	29,993,708	0.0%	Shares	Sole	2024-02-14
2023-09-30	$163,465,708	29,993,708	0.0%	Shares	Sole	2023-11-14
2023-06-30	$201,257,780	29,993,708	0.0%	Shares	Sole	2023-08-14
2023-03-31	$264,844,441	29,993,708	0.0%	Shares	Sole	2023-05-15
2022-12-31	$229,151,929	29,993,708	0.0%	Shares	Sole	2023-02-14
2022-09-30	$213,555,200	29,993,708	0.0%	Shares	Sole	2022-11-14
2022-06-30	$242,649,097	29,993,708	0.0%	Shares	Sole	2022-08-15
2022-03-31	$416,312,667	29,993,708	0.0%	Shares	Sole	2022-05-16
2021-12-31	$841,623,446	29,993,708	0.0%	Shares	Sole	2022-05-16
2021-09-30	$1,019,486,134	29,993,708	0.0%	Shares	Sole	2022-05-16
2021-06-30	$1,225,542,908	29,993,708	0.0%	Shares	Sole	2021-08-16
2021-03-31	$1,207,546,684	29,993,708	0.0%	Shares	Sole	2021-05-17
2020-12-31	$1,773,527,954	29,993,708	-10.4%	Shares	Sole	2021-02-16
2020-09-30	$1,628,799,020	33,493,708	0.0%	Shares	Sole	2020-11-16
2020-06-30	$1,620,425,593	33,493,708	0.0%	Shares	Sole	2020-08-07
2020-03-31	$930,455,208	33,493,708	—	Shares	Sole	2020-05-13
No filing history on record for this holder in this stock.