AnaptysBio Ownership | Who Owns AnaptysBio?

Overview Forecast RevenueFinancials Chart

AnaptysBio Ownership Summary

AnaptysBio is owned by 6.40% institutional investors, 6.03% insiders, and 87.57% retail investors. Ecor1 capital is the largest institutional shareholder, holding 27.35% of ANAB shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 2.39% of its assets in AnaptysBio shares.

ANAB Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	AnaptysBio	6.40%	6.03%	87.57%
Sector	Healthcare Stocks	231.98%	10.74%	-142.72%
Industry	Biotech Stocks	381.47%	10.55%	-292.02%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Ecor1 capital	7.88M	27.35%	$241.29M
Point72 asset management	2.27M	7.86%	$69.37M
Blackrock	1.77M	6.47%	$44.35M
Blackrock funding, inc. /de	1.73M	5.97%	$84.09M
Vanguard group	1.54M	5.31%	$74.85M
Boxer capital	1.30M	4.75%	$32.58M
Tang capital management	1.33M	4.63%	$40.84M
Morgan stanley	1.03M	3.56%	$50.16M
First light asset management	990.16K	3.44%	$30.32M
State street	873.43K	3.03%	$26.74M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Sanofi	821.92K	12.84%	$39.85M
Ecor1 capital	7.88M	11.58%	$241.29M
Palo alto investors lp	673.52K	3.82%	$20.62M
First light asset management	990.16K	2.86%	$30.32M
Highmark wealth management	94.05K	1.86%	$4.56M
Boxer capital	1.30M	1.72%	$32.58M
Tang capital management	1.33M	1.57%	$40.84M
683 capital management	547.00K	0.88%	$16.75M
Dcf advisers	35.25K	0.46%	$1.71M
Moody aldrich partners	47.60K	0.43%	$2.31M

Top Buyers

Holder	Shares	% Assets	Change
Arrowstreet capital, limited partnership	370.46K	0.01%	219.65K
Lmr partners llp	140.72K	0.02%	140.72K
Connor, clark & lunn investment management	122.48K	0.02%	122.48K
Federated hermes	299.42K	0.02%	106.09K
Algert global	83.77K	0.04%	83.77K

Top Sellers

Holder	Shares	% Assets	Change
First light asset management	990.16K	2.86%	-2.55M
Fairmount funds management	-	-	-1.82M
Frazier life sciences management	-	-	-1.57M
Assenagon asset management	-	-	-839.93K
Sofinnova investments	254.27K	0.43%	-778.09K

New Positions

Holder	Shares	% Assets	Change	Value
Lmr partners llp	140.72K	0.02%	140.72K	$1.86M
Connor, clark & lunn investment management	122.48K	0.02%	122.48K	$5.94M
Jump financial	82.08K	0.03%	82.08K	$2.51M
Penserra capital management	56.35K	0.03%	56.35K	$2.73M
Y-intercept (hong kong)	33.10K	0.04%	33.10K	$1.60M

Sold Out

Holder	Change
Nelson, van denburg & campbell wealth management group	-4.00
Northwestern mutual wealth management	-7.00
Montag a & associates	-9.00
Riverview trust	-13.00
Principal securities	-14.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	36	-79.55%	1,861,311	-94.12%	6	0.05%	17	-77.63%	10	-83.61%
Sep 30, 2025	56	-63.16%	4,268,326	-88.39%	14	0.09%	20	-72.60%	23	-56.60%
Jun 30, 2025	151	-3.82%	36,769,517	-7.97%	127	0.75%	73	-13.10%	52	13.04%
Mar 31, 2025	12	-92.26%	7,471,731	-78.90%	24	0.16%	7	-91.36%	4	-88.57%
Dec 31, 2024	153	-12.07%	33,843,782	0.64%	117	0.86%	80	-21.57%	34	3.03%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	733.95K	2.39%	129.10K
Vanguard Total Stock Mkt Idx Inv	614.55K	2.22%	-
State Street® SPDR® S&P® Biotech ETF	605.18K	2.19%	-3.26K
Fidelity Small Cap Growth	625.15K	2.13%	-
iShares Russell 2000 ETF	444.15K	1.60%	26.44K
FIAM Small Cap Core Composite	460.10K	1.57%	-11.00K
US Small-Cap Growth II Equity Comp	440.07K	1.50%	-105.21K
Fidelity Advisor Biotechnology I	423.10K	1.38%	-
T. Rowe Price New Horizons	371.08K	1.33%	-68.99K
SPDR® S&P Biotech ETF	326.85K	1.17%	730.00

Recent Insider Transactions

Date	Name	Role	Activity	Value
Feb 11, 2026	LOUMEAU ERIC J	CHIEF LEGAL OFFICER	Sell	$540.00K
Jan 15, 2026	Marquet Magda	-	Sell	$447.00K
Jan 15, 2026	Marquet Magda	-	Sell	$83.53K
Jan 08, 2026	Lizzul Paul F.	Chief Medical Officer	Sell	$163.19K
Jan 08, 2026	MULROY DENNIS	CHIEF FINANCIAL OFFICER	Sell	$112.45K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	18
2025 Q4	-	10
2025 Q3	-	5
2025 Q2	-	2
2025 Q1	1	-

ANAB Ownership FAQ

Who Owns AnaptysBio?

AnaptysBio shareholders are primarily institutional investors at 6.40%, followed by 6.03% insiders and 87.57% retail investors. The average institutional ownership in AnaptysBio's industry, Biotech Stocks , is 381.47%, which AnaptysBio falls below.

Who owns the most shares of AnaptysBio?

AnaptysBio’s largest shareholders are Ecor1 capital (7.88M shares, 27.35%), Point72 asset management (2.27M shares, 7.86%), and Blackrock (1.77M shares, 6.47%). Together, they hold 41.69% of AnaptysBio’s total shares outstanding.

Does Blackrock own AnaptysBio?

Yes, BlackRock owns 6.47% of AnaptysBio, totaling 1.77M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 44.35M$. In the last quarter, BlackRock increased its holdings by 49.89K shares, a 2.90% change.

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

Sanofi is AnaptysBio’s biggest shareholder by percentage of total assets invested, with 12.84% of its assets in 821.92K AnaptysBio shares, valued at 39.85M$.

Who is the top mutual fund holder of AnaptysBio shares?

Vanguard US Total Market Shares ETF is the top mutual fund holder of AnaptysBio shares, with 2.39% of its total shares outstanding invested in 733.95K AnaptysBio shares.

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