AnaptysBio Ownership | Who Owns AnaptysBio?

Overview Forecast RevenueFinancials Chart

AnaptysBio Ownership Summary

AnaptysBio is owned by 24.38% institutional investors, 5.06% insiders, and 70.55% retail investors. Ecor1 capital is the largest institutional shareholder, holding 27.25% 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	24.38%	5.06%	70.55%
Sector	Healthcare Stocks	279.19%	10.62%	-189.81%
Industry	Biotech Stocks	63.96%	10.74%	25.30%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Ecor1 capital	7.87M	27.25%	$104.24M
First light asset management	4.63M	15.12%	$86.14M
Fmr	3.03M	10.49%	$40.12M
Blackrock funding, inc. /de	2.55M	8.82%	$33.74M
Blackrock	1.77M	6.47%	$44.35M
Vanguard group	1.84M	6.38%	$24.41M
Boxer capital	1.30M	4.75%	$32.58M
Tang capital management	1.33M	4.61%	$17.62M
State street	1.29M	4.45%	$17.02M
Camber capital management lp	1.25M	4.33%	$16.55M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
First light asset management	4.63M	9.84%	$86.14M
Sanofi	821.92K	6.24%	$10.88M
Ecor1 capital	7.87M	3.94%	$104.24M
Palo alto investors lp	1.02M	3.61%	$18.98M
Exome asset management	116.62K	1.93%	$2.17M
Boxer capital	1.30M	1.72%	$32.58M
Sofinnova investments	1.16M	1.41%	$21.57M
Tang capital management	1.33M	1.17%	$17.62M
5am venture management	357.73K	1.13%	$4.74M
Opaleye management	250.93K	1.04%	$4.66M

Top Buyers

Holder	Shares	% Assets	Change
First light asset management	4.63M	9.84%	3.76M
Camber capital management lp	1.25M	0.38%	1.25M
Sofinnova investments	1.16M	1.41%	1.03M
Sanofi	821.92K	6.24%	821.92K
State street	1.29M	0.00%	379.57K

Top Sellers

Holder	Shares	% Assets	Change
Fairmount funds management	-	-	-1.82M
Frazier life sciences management	-	-	-1.57M
Mangrove partners	-	-	-689.52K
Morgan stanley	91.77K	0.00%	-544.35K
Deep track capital, lp	-	-	-529.45K

New Positions

Holder	Shares	% Assets	Change	Value
Sanofi	821.92K	6.24%	821.92K	$10.88M
Opaleye management	250.93K	1.04%	250.93K	$4.66M
Lmr partners llp	140.72K	0.02%	140.72K	$1.86M
Exome asset management	116.62K	1.93%	116.62K	$2.17M
Nebula research & development	17.42K	0.03%	17.42K	$230.67K

Sold Out

Holder	Change
Nelson, van denburg & campbell wealth management group	-4.00
Northwestern mutual wealth management	-7.00
Riverview trust	-13.00
True wealth design	-15.00
Wealthcollab	-20.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Jun 30, 2024	137	-1.44%	29,796,164	1.98%	108	0.92%	67	3.08%	45	12.50%
Mar 31, 2024	139	12.10%	29,216,786	-3.19%	109	0.87%	65	41.30%	40	-9.09%

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	668.95K	2.28%	-
Fidelity Small Cap Growth	625.15K	2.11%	-
iShares Russell 2000 ETF	557.41K	1.90%	273.00
US Small-Cap Growth II Equity Comp	545.28K	1.78%	-7.53K
T. Rowe Price New Horizons	545.28K	1.78%	-7.37K
FIAM Small Cap Core CIT Cl B	460.10K	1.56%	-11.00K
FIAM Small Cap Core Composite	471.10K	1.54%	-76.70K
Fidelity Advisor Biotechnology I	423.10K	1.38%	-
SPDR® S&P Biotech ETF	351.73K	1.20%	456.00

Recent Insider Transactions

Date	Name	Role	Activity	Value
Dec 30, 2024	EcoR1 Capital, LLC		Buy	$842.06K
Dec 31, 2024	EcoR1 Capital, LLC		Buy	$171.51K
Jan 02, 2025	EcoR1 Capital, LLC		Buy	$86.07K
Nov 29, 2024	RENTON HOLLINGS	-	Sell	$250.00K
Sep 23, 2024	Lizzul Paul F.	Chief Medical Officer	Sell	$58.01K

Insider Transactions Trends

Date	Buy	Sell
2025 Q1	1	-
2024 Q4	2	1
2024 Q3	1	11
2024 Q2	-	3
2024 Q1	-	8

ANAB Ownership FAQ

Who Owns AnaptysBio?

AnaptysBio shareholders are primarily institutional investors at 24.38%, followed by 5.06% insiders and 70.56% retail investors. The average institutional ownership in AnaptysBio's industry, Biotech Stocks , is 63.96%, which AnaptysBio falls below.

Who owns the most shares of AnaptysBio?

AnaptysBio’s largest shareholders are Ecor1 capital (7.87M shares, 27.25%), First light asset management (4.63M shares, 15.12%), and Fmr (3.03M shares, 10.49%). Together, they hold 52.86% 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?

First light asset management is AnaptysBio’s biggest shareholder by percentage of total assets invested, with 9.84% of its assets in 4.63M AnaptysBio shares, valued at 86.14M$.

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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