Adaptive Bio Ownership | Who Owns Adaptive Bio?

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Adaptive Bio Ownership Summary

Adaptive Bio is owned by 49.07% institutional investors, 2.05% insiders, and 48.88% retail investors. Viking global investors lp is the largest institutional shareholder, holding 19.72% of ADPT shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 2.98% of its assets in Adaptive Bio shares.

ADPT Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Adaptive Bio	49.07%	2.05%	48.88%
Sector	Healthcare Stocks	232.63%	10.66%	-143.29%
Industry	Biotech Stocks	382.12%	10.42%	-292.54%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Viking global investors lp	29.99M	19.72%	$448.71M
Blackrock funding, inc. /de	13.33M	8.79%	$216.54M
Vanguard group	11.28M	7.40%	$183.22M
Millennium management	6.29M	4.27%	$37.72M
Ameriprise financial	5.97M	3.93%	$89.34B
Westfield capital management co lp	4.06M	2.68%	$65.94M
Geode capital management	3.51M	2.31%	$57.04M
Aristotle atlantic partners	3.13M	2.06%	$46.78M
Lord, abbett	3.08M	2.03%	$50.03M
State street	3.08M	2.02%	$46.07M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Blue water life science advisors, lp	2.15M	29.28%	$32.09M
Iron triangle partners lp	1.82M	3.87%	$27.24M
Catalio capital management, lp	884.89K	2.45%	$13.24M
Essex investment management	638.46K	1.46%	$9.55M
Aristotle atlantic partners	3.13M	1.36%	$46.78M
Beaconlight capital	171.60K	1.27%	$2.57M
Viking global investors lp	29.99M	1.17%	$448.71M
Rhenman & partners asset management ab	495.00K	0.82%	$7.41B
Affinity wealth management	314.35K	0.73%	$5.11M
Eam investors	351.30K	0.64%	$5.71M

Top Buyers

Holder	Shares	% Assets	Change
Westfield capital management co lp	4.06M	0.27%	4.06M
Ameriprise financial	5.97M	0.02%	2.73M
Arrowstreet capital, limited partnership	2.44M	0.02%	2.06M
Lord, abbett	3.08M	0.15%	1.85M
Jennison associates	2.67M	0.03%	1.36M

Top Sellers

Holder	Shares	% Assets	Change
Rubric capital management lp	-	-	-6.26M
Braidwell lp	736.01K	0.33%	-3.13M
Millennium management	6.29M	0.02%	-3.11M
Macquarie group	-	-	-2.10M
Nikko asset management americas	1.95M	0.37%	-1.70M

New Positions

Holder	Shares	% Assets	Change	Value
Westfield capital management co lp	4.06M	0.27%	4.06M	$65.94M
Summit partners public asset management	998.25K	0.31%	998.25K	$14.93M
Next century growth investors	531.32K	0.58%	531.32K	$7.95M
Wellington management group llp	501.08K	0.00%	501.08K	$7.50M
Rhenman & partners asset management ab	495.00K	0.82%	495.00K	$7.41B

Sold Out

Holder	Change
Wealthspire advisors	-7.00
Ronald blue trust	-21.00
Prestige wealth management group	-25.00
Birch capital management	-40.00
Stephens consulting	-45.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	188	-30.88%	74,799,607	-48.57%	49	0.54%	97	-35.33%	60	-24.05%
Sep 30, 2025	257	5.33%	143,897,903	-2.89%	94	1.00%	139	-	77	24.19%
Jun 30, 2025	243	7.05%	148,113,052	-1.78%	97	0.95%	137	22.32%	63	-4.55%
Mar 31, 2025	227	8.10%	152,848,969	6.73%	102	1.09%	113	0.89%	65	44.44%
Dec 31, 2024	209	11.17%	143,202,065	0.07%	97	1.03%	111	14.43%	45	2.27%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Total Stock Mkt Idx Inv	4.58M	2.98%	12.58K
Vanguard US Total Market Shares ETF	4.19M	2.82%	-
iShares Russell 2000 ETF	3.61M	2.35%	1.19M
Nikko AM ARK Pstv Chg Innovt P JPY Acc	3.56M	2.34%	-116.30K
Columbia Large Cap Growth SMA Cmp	3.25M	2.19%	3.25M
Columbia Large Cap Growth V	3.25M	2.19%	3.25M
Columbia Large Cap Growth	3.25M	2.19%	3.25M
Columbia Cornerstone Growth SMA	3.25M	2.14%	3.25M
Columbia Small Cap Growth Inst	2.19M	1.44%	193.43K
Nikko Gbl All Biological Genome Eq MF	2.06M	1.40%	-121.82K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Mar 18, 2026	RUBINSTEIN JULIE	President and COO	Sell	$251.21K
Mar 17, 2026	RUBINSTEIN JULIE	President and COO	Sell	$255.40K
Mar 16, 2026	RUBINSTEIN JULIE	President and COO	Sell	$255.59K
Mar 11, 2026	RUBINSTEIN JULIE	President and COO	Sell	$1.61M
Mar 12, 2026	RUBINSTEIN JULIE	President and COO	Sell	$172.53K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	41
2025 Q4	-	16
2025 Q2	-	3
2025 Q1	-	25
2024 Q4	-	1

ADPT Ownership FAQ

Who Owns Adaptive Bio?

Adaptive Bio shareholders are primarily institutional investors at 49.07%, followed by 2.05% insiders and 48.88% retail investors. The average institutional ownership in Adaptive Bio's industry, Biotech Stocks , is 382.12%, which Adaptive Bio falls below.

Who owns the most shares of Adaptive Bio?

Adaptive Bio’s largest shareholders are Viking global investors lp (29.99M shares, 19.72%), Blackrock funding, inc. /de (13.33M shares, 8.79%), and Vanguard group (11.28M shares, 7.40%). Together, they hold 35.91% of Adaptive Bio’s total shares outstanding.

Does Blackrock own Adaptive Bio?

BlackRock is not among the top 10 institutional shareholders of Adaptive Bio.

Who is Adaptive Bio’s biggest shareholder by percentage of total assets invested?

Blue water life science advisors, lp is Adaptive Bio’s biggest shareholder by percentage of total assets invested, with 29.28% of its assets in 2.15M Adaptive Bio shares, valued at 32.09M$.

Who is the top mutual fund holder of Adaptive Bio shares?

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of Adaptive Bio shares, with 2.98% of its total shares outstanding invested in 4.58M Adaptive Bio shares.

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