AnaptysBio Ownership | Who Owns AnaptysBio?


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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


TypeName% Inst% Insiders% Retail
StockAnaptysBio127.63%5.82%-33.44%
SectorHealthcare Stocks 488.17%11.08%-399.26%
IndustryBiotech Stocks 307.00%11.11%-218.12%

Institutional Shareholders


Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Ecor1 capital7.87M27.25%$104.24M
First light asset management3.54M12.29%$78.58M
Fmr3.03M10.49%$40.12M
Point72 asset management2.47M8.59%$54.94M
Blackrock1.77M6.47%$44.35M
Vanguard group1.84M6.38%$24.41M
Blackrock funding, inc. /de1.79M6.20%$39.67M
Boxer capital1.30M4.75%$32.58M
Tang capital management1.33M4.62%$29.55M
State street1.29M4.45%$17.02M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Sanofi821.92K10.38%$18.25M
First light asset management3.54M10.19%$78.58M
Ecor1 capital7.87M3.94%$104.24M
Palo alto investors lp812.82K3.84%$18.04M
Boxer capital1.30M1.72%$32.58M
Highmark wealth management145.55K1.58%$3.23M
Tang capital management1.33M1.49%$29.55M
Sofinnova investments1.03M1.40%$22.92M
Sectoral asset management83.90K1.23%$1.86M
683 capital management500.00K0.73%$11.10M

Top Buyers

HolderShares% AssetsChange
State street1.29M0.00%379.57K
683 capital management500.00K0.73%304.37K
Soleus capital management321.04K0.47%218.99K
Arrowstreet capital, limited partnership150.81K0.00%150.81K
Vanguard group1.84M0.00%143.58K

Top Sellers

HolderShares% AssetsChange
Fairmount funds management---1.82M
Frazier life sciences management---1.57M
First light asset management3.54M10.19%-1.09M
Mangrove partners---689.52K
Camber capital management lp125.00K0.26%-625.00K

New Positions

HolderShares% AssetsChangeValue
Arrowstreet capital, limited partnership150.81K0.00%150.81K$3.35M
Lmr partners llp140.72K0.02%140.72K$1.86M
Sectoral asset management83.90K1.23%83.90K$1.86M
Aquatic capital management65.81K0.03%65.81K$1.46M
Bleakley financial group37.55K0.02%37.55K$833.63K

Sold Out

HolderChange
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


DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Jun 30, 2025151-3.82%36,769,517-7.97%1270.75%73-13.10%5213.04%
Mar 31, 202512-92.26%7,471,731-78.90%240.16%7-91.36%4-88.57%
Dec 31, 2024153-12.07%33,843,7820.64%1170.86%80-21.57%343.03%
Sep 30, 202417326.28%33,610,26812.80%1160.98%10252.24%32-28.89%
Jun 30, 2024137-1.44%29,796,1641.98%1080.92%673.08%4512.50%

Top Mutual Funds Shareholders


HolderShares% HoldingChange
Vanguard US Total Market Shares ETF733.95K2.39%129.10K
Vanguard Total Stock Mkt Idx Inv668.92K2.39%-14.83K
Fidelity Small Cap Growth625.15K2.13%-
iShares Russell 2000 ETF461.23K1.65%-8.82K
FIAM Small Cap Core Composite460.10K1.57%-11.00K
US Small-Cap Growth II Equity Comp440.07K1.50%-105.21K
T. Rowe Price New Horizons440.07K1.50%-54.89K
Fidelity Advisor Biotechnology I423.10K1.38%-
FIAM Small Cap Core CIT Cl B341.50K1.16%-118.60K
T. Rowe Price Health Sciences348.01K1.14%-19.42K

Recent Insider Transactions


DateNameRoleActivityValue
Aug 08, 2025RENTON HOLLINGS-Sell$60.46K
Aug 08, 2025RENTON HOLLINGS-Sell$140.26K
Jul 02, 2025RENTON HOLLINGS-Sell$167.41K
Jul 02, 2025RENTON HOLLINGS-Sell$325.78K
Jun 18, 2025FENTON DENNIS M-Sell$72.27K

Insider Transactions Trends


DateBuySell
2025 Q3-2
2025 Q2-2
2025 Q11-
2024 Q421
2024 Q3111

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 307.00%, 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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