AnaptysBio Ownership | Who Owns AnaptysBio?

Overview Forecast RevenueFinancials Chart

AnaptysBio Ownership Summary

AnaptysBio is owned by 127.63% institutional investors, 5.82% insiders. 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	127.63%	5.82%	-33.44%
Sector	Healthcare Stocks	488.17%	11.08%	-399.26%
Industry	Biotech Stocks	306.59%	11.10%	-217.69%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Ecor1 capital	7.87M	27.25%	$104.24M
First light asset management	3.54M	12.29%	$78.58M
Fmr	3.03M	10.49%	$40.12M
Point72 asset management	2.47M	8.59%	$54.94M
Blackrock	1.77M	6.47%	$44.35M
Vanguard group	1.84M	6.38%	$24.41M
Blackrock funding, inc. /de	1.79M	6.20%	$39.67M
Boxer capital	1.30M	4.75%	$32.58M
Tang capital management	1.33M	4.62%	$29.55M
State street	1.29M	4.45%	$17.02M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Sanofi	821.92K	10.38%	$18.25M
First light asset management	3.54M	10.19%	$78.58M
Ecor1 capital	7.87M	3.94%	$104.24M
Palo alto investors lp	812.82K	3.84%	$18.04M
Boxer capital	1.30M	1.72%	$32.58M
Highmark wealth management	145.55K	1.58%	$3.23M
Tang capital management	1.33M	1.49%	$29.55M
Sofinnova investments	1.03M	1.40%	$22.92M
Sectoral asset management	83.90K	1.23%	$1.86M
683 capital management	500.00K	0.73%	$11.10M

Top Buyers

Holder	Shares	% Assets	Change
State street	1.29M	0.00%	379.57K
683 capital management	500.00K	0.73%	304.37K
Soleus capital management	321.04K	0.47%	218.99K
Arrowstreet capital, limited partnership	150.81K	0.00%	150.81K
Vanguard group	1.84M	0.00%	143.58K

Top Sellers

Holder	Shares	% Assets	Change
Fairmount funds management	-	-	-1.82M
Frazier life sciences management	-	-	-1.57M
First light asset management	3.54M	10.19%	-1.09M
Mangrove partners	-	-	-689.52K
Camber capital management lp	125.00K	0.26%	-625.00K

New Positions

Holder	Shares	% Assets	Change	Value
Arrowstreet capital, limited partnership	150.81K	0.00%	150.81K	$3.35M
Lmr partners llp	140.72K	0.02%	140.72K	$1.86M
Sectoral asset management	83.90K	1.23%	83.90K	$1.86M
Aquatic capital management	65.81K	0.03%	65.81K	$1.46M
Bleakley financial group	37.55K	0.02%	37.55K	$833.63K

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
Creative financial designs inc /adv	-16.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Jun 30, 2024	137	-1.44%	29,796,164	1.98%	108	0.92%	67	3.08%	45	12.50%

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	461.23K	1.65%	-8.82K
FIAM Small Cap Core Composite	460.10K	1.57%	-11.00K
US Small-Cap Growth II Equity Comp	440.07K	1.50%	-105.21K
T. Rowe Price New Horizons	440.07K	1.50%	-54.89K
Fidelity Advisor Biotechnology I	423.10K	1.38%	-
FIAM Small Cap Core CIT Cl B	341.50K	1.16%	-118.60K
T. Rowe Price Health Sciences	348.01K	1.14%	-19.42K

Recent Insider Transactions

Date	Name	Role	Activity	Value
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
Jun 18, 2025	FENTON DENNIS M	-	Sell	$72.27K

Insider Transactions Trends

Date	Buy	Sell
2025 Q3	-	2
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 127.63%, followed by 5.82% insiders and -33.45% retail investors. The average institutional ownership in AnaptysBio's industry, Biotech Stocks , is 306.59%, 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 (3.54M shares, 12.29%), and Fmr (3.03M shares, 10.49%). Together, they hold 50.02% 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 10.38% of its assets in 821.92K AnaptysBio shares, valued at 18.25M$.

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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