Anaptysbio ANAB Institutional Ownership

NASDAQ ANAB

$50.26 -0.11 (-0.22%)

At close: Sep 30, 2026 · 4:00 PM EDT

Institutions by Trading Activity

214 Institutions

Increased 121 56.5%

Unchanged 29 13.6%

Reduced 64 29.9%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

105.66%

▲+7.19 pp QoQ

Shares Held by Institutions

30.32Mn

of 28.69Mn outstanding

▲+10.84% QoQ

Shares Outstanding

28.69Mn

-1.63Mn held outside 13F filers

Institutional Investors

214

filed 13F for Jun 2026

▲+6 vs prior quarter

Net Shares Added (QoQ)

+2.96Mn

accumulated since last quarter

Value of Holdings

$1.52Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Anaptysbio, Inc (NASDAQ:ANAB) showed up in the 13F filings of 214 institutional investors as of June 2026.

They owned 105.7% of outstanding stock in June 2026, up from 98.5% the prior quarter.
They increased total shares held in ANAB by 10.84% quarter over quarter, and investors in Anaptysbio increased 45.58% from a year ago.
Among the 214 funds, 121 bought more Anaptysbio shares, 64 sold down, and 29 held their ground.
In total, institutional investors held 30.32Mn shares in Anaptysbio as of June 2026, up by 2.96Mn shares quarter on quarter, and down 4.47Mn shares year over year.
As of June 30, 2026, EcoR1 Capital, LLC held the largest stake in Anaptysbio with 7.88Mn shares, accounting for 27.47% of total shares outstanding.
Top purchasers of ANAB stock for the quarter ending June 2026 included Woodline Partners LP (372.76K), MILLENNIUM MANAGEMENT LLC (331.74K), State Street Corp (293.75K), APIS CAPITAL ADVISORS, LLC (259.0K), FIRST TRUST ADVISORS LP (258.99K).
The largest sellers of Anaptysbio for the quarter ending June 2026 were Morgan Stanley (736.81K), FMR LLC (232.19K), TWO SIGMA INVESTMENTS, LP (202.09K), Affinity Asset Advisors, LLC (113.89K), BNP PARIBAS FINANCIAL MARKETS (89.0K).
Business Quant data shows the 10 biggest positions in Anaptysbio as of June 2026 are held by EcoR1 Capital, LLC (7.88Mn), BlackRock, Inc. (1.84Mn), TANG CAPITAL MANAGEMENT LLC (1.33Mn), State Street Corp (1.29Mn), VANGUARD CAPITAL MANAGEMENT LLC (906.23K), Affinity Asset Advisors, LLC (826.11K), Sanofi (821.92K), MILLENNIUM MANAGEMENT LLC (807.32K), Woodline Partners LP (717.01K), 683 Capital Management, LLC (660.0K).

Form 13F Holdings

214 Institutional Holders

Report period 30 Jun, 2026

Total shares held 30.32Mn

Of outstanding 105.66%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	EcoR1 Capital, LLC	0001587114	7,880,094	27.47%	0	0.00%	$531.91Mn
2	BlackRock, Inc.	0002012383	1,844,049	6.43%	▲162,669	+9.67%	$124.47Mn
3	TANG CAPITAL MANAGEMENT LLC	0001232621	1,330,879	4.64%	0	0.00%	$89.83Mn
4	State Street Corp	0000093751	1,286,194	4.48%	▲293,749	+29.60%	$86.82Mn
5	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	906,233	3.16%	▲53,082	+6.22%	$61.17Mn
6	Affinity Asset Advisors, LLC	0001773195	826,109	2.88%	▼113,891	-12.12%	$55.76Mn
7	Sanofi	0001121404	821,917	2.86%	0	0.00%	$55.48Mn
8	MILLENNIUM MANAGEMENT LLC	0001273087	807,316	2.81%	▲331,744	+69.76%	$54.49Mn
9	Woodline Partners LP	0001784547	717,014	2.50%	▲372,758	+108.28%	$48.40Mn
10	683 Capital Management, LLC	0001404574	660,000	2.30%	▲35,000	+5.60%	$44.55Mn
11	GEODE CAPITAL MANAGEMENT, LLC	0001214717	637,873	2.22%	▲117,632	+22.61%	$43.06Mn
12	Palo Alto Investors LP	0001306923	603,489	2.10%	▼34,672	-5.43%	$40.74Mn
13	Goldman Sachs Group Inc	0000886982	584,070	2.04%	▲251,327	+75.53%	$39.42Mn
14	First Light Asset Management, LLC	0001600004	582,004	2.03%	▲16,573	+2.93%	$39.29Mn
15	D. E. Shaw & Co., Inc.	0001009207	539,666	1.88%	▼39,630	-6.84%	$36.43Mn
16	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	527,858	1.84%	▲7,988	+1.54%	$35.63Mn
17	APIS CAPITAL ADVISORS, LLC	0001386892	497,000	1.73%	▲259,000	+108.82%	$33.55Mn
18	Sofinnova Investments, Inc.	0001631134	493,536	1.72%	▲245,283	+98.80%	$33.31Mn
19	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	0001164508	488,651	1.70%	▼3,469	-0.70%	$32.98Mn
20	Nuveen, LLC	0001871926	420,664	1.47%	▲104,599	+33.09%	$28.39Mn

Showing 1 to 20 of 214 holders