AnaptysBio Ownership | Who Owns AnaptysBio?


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AnaptysBio Ownership Summary


AnaptysBio is owned by 22.77% institutional investors, 5.74% insiders, and 71.48% retail investors. Ecor1 capital is the largest institutional shareholder, holding 28.36% 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
StockAnaptysBio22.77%5.74%71.48%
SectorHealthcare Stocks 35.58%11.87%52.55%
IndustryBiotech Stocks 35.75%11.83%52.41%

Institutional Shareholders


Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Ecor1 capital7.88M28.36%$437.03M
Blackrock1.77M6.47%$44.35M
Blackrock funding, inc. /de1.68M6.05%$93.25M
Vanguard group1.54M5.31%$74.85M
Tang capital management1.33M4.79%$73.81M
Boxer capital1.30M4.75%$32.58M
Morgan stanley993.90K3.58%$55.12M
State street992.45K3.57%$55.04M
Affinity asset advisors940.00K3.38%$52.13M
Sanofi821.92K2.96%$30.38M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Ecor1 capital7.88M18.55%$437.03M
Sanofi821.92K9.04%$30.38M
Palo alto investors lp638.16K5.41%$35.39M
Tang capital management1.33M3.75%$73.81M
First light asset management565.43K2.81%$31.36M
Affinity asset advisors940.00K2.69%$52.13M
Highmark wealth management94.05K2.12%$5.22M
Apis capital advisors238.00K2.04%$13.20M
Synergy asset management317.11K1.87%$17.59M
683 capital management625.00K1.81%$34.66M

Top Buyers

HolderShares% AssetsChange
Affinity asset advisors940.00K2.69%495.31K
Fmr472.70K0.00%445.60K
Synergy asset management317.11K1.87%317.11K
Apis capital advisors238.00K2.04%238.00K
Two sigma investments, lp465.08K0.02%208.45K

Top Sellers

HolderShares% AssetsChange
Point72 asset management55.30K0.00%-1.88M
Fairmount funds management---1.82M
Frazier life sciences management---1.57M
Assenagon asset management---839.93K
Camber capital management lp125.00K0.26%-625.00K

New Positions

HolderShares% AssetsChangeValue
Synergy asset management317.11K1.87%317.11K$17.59M
Apis capital advisors238.00K2.04%238.00K$13.20M
Lmr partners llp140.72K0.02%140.72K$1.86M
Vanguard fiduciary trust135.08K0.00%135.08K$7.49M
Hsbc125.72K0.00%125.72K$7.14M

Sold Out

HolderChange
Nelson, van denburg & campbell wealth management group-4.00
Northwestern mutual wealth management-7.00
Srs capital advisors-8.00
Montag a & associates-9.00
Riverview trust-13.00

Institutional Ownership Trends


DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Mar 31, 202682-55.19%4,219,141-85.63%220.22%42-52.81%22-65.08%
Dec 31, 202536-79.55%1,861,311-94.12%60.05%17-77.63%10-83.61%
Sep 30, 202556-63.16%4,268,326-88.39%140.09%20-72.60%23-56.60%
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%

Top Mutual Funds Shareholders


HolderShares% HoldingChange
Vanguard US Total Market Shares ETF733.95K2.39%129.10K
Vanguard Total Stock Mkt Idx Inv640.05K2.20%25.50K
Fidelity Small Cap Growth625.15K2.13%-
State Street® SPDR® S&P® Biotech ETF564.45K1.94%-5.65K
FIAM Small Cap Core Composite460.10K1.57%-11.00K
iShares Russell 2000 ETF437.11K1.50%3.67K
US Small-Cap Growth II Equity Comp440.07K1.50%-105.21K
T. Rowe Price New Horizons371.08K1.33%-68.99K
SPDR® S&P Biotech ETF326.85K1.17%730.00
FIAM Small Cap Core CIT Cl B341.50K1.16%-118.60K

Recent Insider Transactions


DateNameRoleActivityValue
Mar 30, 2026Schmid John P.-Sell$29.96K
Mar 30, 2026Schmid John P.-Sell$426.78K
Mar 30, 2026Schmid John P.-Sell$701.71K
Mar 27, 2026Faga Daniel President, CEOSell$28.87K
Mar 27, 2026Faga Daniel President, CEOSell$148.82K

Insider Transactions Trends


DateBuySell
2026 Q2--
2026 Q1-31
2025 Q4-10
2025 Q3-5
2025 Q2-2

ANAB Ownership FAQ


Who Owns AnaptysBio?

AnaptysBio shareholders are primarily institutional investors at 22.77%, followed by 5.74% insiders and 71.49% retail investors. The average institutional ownership in AnaptysBio's industry, Biotech Stocks , is 35.75%, which AnaptysBio falls below.

Who owns the most shares of AnaptysBio?

AnaptysBio’s largest shareholders are Ecor1 capital (7.88M shares, 28.36%), Blackrock (1.77M shares, 6.47%), and Blackrock funding, inc. /de (1.68M shares, 6.05%). Together, they hold 40.88% 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 18.55% of its assets in 7.88M AnaptysBio shares, valued at 437.03M$.

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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