AnaptysBio Ownership | Who Owns AnaptysBio?

Overview Forecast RevenueFinancials Chart

AnaptysBio Ownership Summary

AnaptysBio is owned by 105.61% institutional investors, 5.68% insiders. Ecor1 capital is the largest institutional shareholder, holding 27.47% of ANAB shares. State Street® SPDR® S&P® Biotech ETF is the top mutual fund, with 2.62% of its assets in AnaptysBio shares.

ANAB Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	AnaptysBio	105.61%	5.68%	-11.29%
Sector	Healthcare Stocks	245.07%	12.10%	-157.17%
Industry	Biotech Stocks	380.48%	11.73%	-292.21%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Ecor1 capital	7.88M	27.47%	$531.91M
Blackrock	1.77M	6.47%	$44.35M
Blackrock funding, inc. /de	1.84M	6.43%	$124.47M
Vanguard group	1.54M	5.31%	$74.85M
Boxer capital	1.30M	4.75%	$32.58M
Tang capital management	1.33M	4.64%	$89.83M
State street	1.29M	4.48%	$86.82M
Vanguard capital management	906.23K	3.16%	$61.17M
Affinity asset advisors	826.11K	2.88%	$55.76M
Sanofi	821.92K	2.86%	$55.48M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Ecor1 capital	7.88M	25.86%	$531.91M
Sanofi	821.92K	10.39%	$55.48M
Greenhaven road investment management	171.06K	7.50%	$11.55M
Palo alto investors lp	603.49K	5.63%	$40.74M
Tang capital management	1.33M	4.08%	$89.83M
Apis capital advisors	497.00K	3.27%	$33.55M
Affinity asset advisors	826.11K	2.52%	$55.76M
First light asset management	582.00K	2.39%	$39.29M
683 capital management	660.00K	2.19%	$44.55M
Sofinnova investments	493.54K	1.72%	$33.31M

Top Buyers

Holder	Shares	% Assets	Change
Woodline partners lp	717.01K	0.15%	372.76K
Millennium management	807.32K	0.02%	331.74K
State street	1.29M	0.00%	293.75K
Apis capital advisors	497.00K	3.27%	259.00K
First trust advisors lp	258.99K	0.01%	258.99K

Top Sellers

Holder	Shares	% Assets	Change
Fairmount funds management	-	-	-1.82M
Frazier life sciences management	-	-	-1.57M
Assenagon asset management	-	-	-839.93K
Morgan stanley	257.09K	0.00%	-736.81K
Camber capital management lp	125.00K	0.26%	-625.00K

New Positions

Holder	Shares	% Assets	Change	Value
First trust advisors lp	258.99K	0.01%	258.99K	$17.48M
Empowered funds	206.01K	0.07%	206.01K	$13.91M
Sixth street partners management company	202.31K	0.00%	202.31K	$13.66M
Dimensional fund advisors lp	185.44K	0.00%	185.44K	$12.52M
Greenhaven road investment management	171.06K	7.50%	171.06K	$11.55M

Sold Out

Holder	Change
Advisory services network	-3.00
Nelson, van denburg & campbell wealth management group	-4.00
Twin peaks wealth advisors	-5.00
Northwestern mutual wealth management	-7.00
Fortitude family office	-8.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	218	3.81%	30,301,342	7.32%	105	0.48%	118	11.32%	67	-6.94%
Mar 31, 2026	82	-55.19%	4,219,141	-85.63%	22	0.22%	42	-52.81%	22	-65.08%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
State Street® SPDR® S&P® Biotech ETF	774.36K	2.62%	1.78K
Vanguard US Total Market Shares ETF	733.95K	2.39%	129.10K
Vanguard MStar Total Stk Mkt Idx Invest	648.15K	2.19%	-
Vanguard Total Stock Mkt Idx Inv	648.15K	2.19%	8.10K
Vanguard Morn Total Stk Mkt Idx Investor	648.15K	2.19%	8.10K
Fidelity Small Cap Growth	625.15K	2.13%	-
iShares Russell 2000 ETF	503.83K	1.70%	-8.93K
US Small-Cap Growth II Equity Comp	440.07K	1.50%	-105.21K
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
Mar 30, 2026	Schmid John P.	-	Sell	$29.96K
Mar 30, 2026	Schmid John P.	-	Sell	$426.78K
Mar 30, 2026	Schmid John P.	-	Sell	$701.71K
Mar 27, 2026	Faga Daniel	President, CEO	Sell	$28.87K
Mar 27, 2026	Faga Daniel	President, CEO	Sell	$148.82K

Insider Transactions Trends

Date	Buy	Sell
2026 Q3	-	-
2026 Q2	-	-
2026 Q1	-	31
2025 Q4	-	10
2025 Q3	-	5

ANAB Ownership FAQ

Who Owns AnaptysBio?

AnaptysBio shareholders are primarily institutional investors at 105.61%, followed by 5.68% insiders and -11.29% retail investors. The average institutional ownership in AnaptysBio's industry, Biotech Stocks , is 380.48%, which AnaptysBio falls below.

Who owns the most shares of AnaptysBio?

AnaptysBio’s largest shareholders are Ecor1 capital (7.88M shares, 27.47%), Blackrock (1.77M shares, 6.47%), and Blackrock funding, inc. /de (1.84M shares, 6.43%). Together, they hold 40.36% 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 25.86% of its assets in 7.88M AnaptysBio shares, valued at 531.91M$.

Who is the top mutual fund holder of AnaptysBio shares?

State Street® SPDR® S&P® Biotech ETF is the top mutual fund holder of AnaptysBio shares, with 2.62% of its total shares outstanding invested in 774.36K AnaptysBio shares.

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