AnaptysBio Ownership | Who Owns AnaptysBio?

Overview Forecast RevenueFinancials Chart

AnaptysBio Ownership Summary

AnaptysBio is owned by 14.82% institutional investors, 5.90% insiders, and 79.29% 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	14.82%	5.90%	79.29%
Sector	Healthcare Stocks	42.50%	10.81%	46.69%
Industry	Biotech Stocks	45.24%	10.75%	44.01%

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	1.72M	5.98%	$52.74M
Morgan stanley	1.56M	5.40%	$47.65M
Vanguard group	1.48M	5.13%	$45.23M
Boxer capital	1.30M	4.75%	$32.58M
Tang capital management	1.33M	4.63%	$40.84M
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
Ecor1 capital	7.88M	11.58%	$241.29M
Sanofi	821.92K	9.67%	$25.17M
Palo alto investors lp	673.52K	3.82%	$20.62M
Sectoral asset management	194.49K	3.68%	$5.96M
First light asset management	990.16K	2.86%	$30.32M
Highmark wealth management	135.05K	1.95%	$4.42M
Boxer capital	1.30M	1.72%	$32.58M
Tang capital management	1.33M	1.57%	$40.84M
Soleus capital management	626.04K	0.96%	$19.17M
683 capital management	547.00K	0.88%	$16.75M

Top Buyers

Holder	Shares	% Assets	Change
Assenagon asset management	839.93K	0.04%	822.98K
Soleus capital management	626.04K	0.96%	305.00K
Arrowstreet capital, limited partnership	370.46K	0.01%	219.65K
Federated hermes	193.33K	0.01%	185.05K
Lmr partners llp	140.72K	0.02%	140.72K

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
Ubs group	75.26K	0.00%	-1.20M
Citigroup	70.53K	0.00%	-975.95K

New Positions

Holder	Shares	% Assets	Change	Value
Lmr partners llp	140.72K	0.02%	140.72K	$1.86M
Jump financial	82.08K	0.03%	82.08K	$2.51M
Walleye capital	56.42K	0.01%	56.42K	$1.73M
Boothbay fund management	27.40K	0.01%	27.40K	$839.05K
Campbell & co investment adviser	18.28K	0.04%	18.28K	$559.76K

Sold Out

Holder	Change
Nelson, van denburg & campbell wealth management group	-4.00
Northwestern mutual wealth management	-7.00
Riverview trust	-13.00
Creative financial designs inc /adv	-16.00
Wealthcollab	-20.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Sep 30, 2024	173	26.28%	33,610,268	12.80%	116	0.98%	102	52.24%	32	-28.89%

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	668.92K	2.39%	-14.83K
Fidelity Small Cap Growth	625.15K	2.13%	-
iShares Russell 2000 ETF	471.53K	1.69%	-
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
FIAM Small Cap Core CIT Cl B	341.50K	1.16%	-118.60K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Sep 30, 2025	LOUMEAU ERIC J	CHIEF LEGAL OFFICER	Sell	$238.96K
Aug 08, 2025	RENTON HOLLINGS	-	Sell	$60.46K
Aug 08, 2025	RENTON HOLLINGS	-	Sell	$140.26K
Jul 02, 2025	RENTON HOLLINGS	-	Sell	$167.41K
Jul 02, 2025	RENTON HOLLINGS	-	Sell	$325.78K

Insider Transactions Trends

Date	Buy	Sell
2025 Q3	-	5
2025 Q2	-	2
2025 Q1	1	-
2024 Q4	2	1
2024 Q3	1	11

ANAB Ownership FAQ

Who Owns AnaptysBio?

AnaptysBio shareholders are primarily institutional investors at 14.82%, followed by 5.90% insiders and 79.28% retail investors. The average institutional ownership in AnaptysBio's industry, Biotech Stocks , is 45.24%, 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?

Ecor1 capital is AnaptysBio’s biggest shareholder by percentage of total assets invested, with 11.58% of its assets in 7.88M AnaptysBio shares, valued at 241.29M$.

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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