AnaptysBio, Inc.
AnaptysBio, Inc. (ANAB) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ANAB · as of Sep 30, 2025
Ownership Breakdown
177
Institutional Holders
▲ 24 vs Q2
$980.50M
Total Inst. Value
▲ $164.09M vs Q2
43.12M
Shares Outstanding
freeFloat 93.44%
31.68M
13F Shares Held
▼ 5.09M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ANAB largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
ECOR1 CAPITAL, LLC pharmaceutical preparations | 7.88M | 27.35% | 27.35% | $241.29B | Nov 14, 2025 | — held |
POINT72 ASSET MANAGEMENT, L.P. pharmaceutical preparations | 2.27M | 7.86% | 7.86% | $69.37B | Nov 14, 2025 | ▼ 209.3K |
BLACKROCK, INC. pharmaceutical preparations | 1.72M | 5.98% | 5.98% | $52.74B | Nov 12, 2025 | ▼ 64.6K |
MORGAN STANLEY pharmaceutical preparations | 1.56M | 5.40% | 5.40% | $47.65B | May 27, 2026 | ▼ 313.6K |
MILLENNIUM MANAGEMENT LLC pharmaceutical preparations | 1.52M | 5.27% | 5.27% | $46.52B | Nov 14, 2025 | ▲ 1.32M |
VANGUARD GROUP INC pharmaceutical preparations | 1.48M | 5.13% | 5.13% | $45.23B | Nov 7, 2025 | ▼ 60.6K |
TANG CAPITAL MANAGEMENT LLC pharmaceutical preparations | 1.33M | 4.63% | 4.63% | $40.84B | Nov 14, 2025 | ▲ 2.8K |
FIRST LIGHT ASSET MANAGEMENT, LLC pharmaceutical preparations | 990.2K | 3.44% | 3.44% | $30.32B | Nov 14, 2025 | ▼ 2.55M |
STATE STREET CORP pharmaceutical preparations | 873.4K | 3.03% | 3.03% | $26.74B | Nov 14, 2025 | ▲ 52.4K |
ASSENAGON ASSET MANAGEMENT S.A. pharmaceutical preparations | 839.9K | 2.92% | 2.92% | $25.72B | Oct 7, 2025 | ▲ 823.0K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
24
Increased
+4.14M shares2
New Positions
first time holders19
Decreased
−8.28M shares0
Sold Out
fully exitedNet shares change (top 50)
4.14M
+4.14M / −8.28M
Net new holders
+7
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ANAB insider trading · insider activity
Source: SEC Form 4
35
Buy transactions
33
Sell transactions
1.06
Buy/Sell ratio
$1M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Hughes Owen director | May 11, 2026 | Award | 11,250 | — | — | 11.3K | Form 4 ↗ |
Murphy Christopher M. Chief Financial Officer | May 11, 2026 | Award | 25,765 | — | — | 25.8K | Form 4 ↗ |
Faga Daniel President, CEO | Apr 20, 2026 | D-Return | 11,000 | $31.12 | $342.3K | 11.0K | Form 4 ↗ |
Orwin John A director | Apr 20, 2026 | Award | 16,510 | $10.87 | $179.5K | 16.5K | Form 4 ↗ |
Orwin John A director | Apr 20, 2026 | D-Return | 16,510 | $14.83 | $244.8K | 16.5K | Form 4 ↗ |
Orwin John A director | Apr 20, 2026 | D-Return | 16,510 | $21.19 | $349.8K | 16.5K | Form 4 ↗ |
Orwin John A director | Apr 20, 2026 | Award | 16,510 | $15.53 | $256.4K | 16.5K | Form 4 ↗ |
Orwin John A director | Apr 20, 2026 | D-Return | 10,600 | $19.50 | $206.7K | 10.6K | Form 4 ↗ |
Orwin John A director | Apr 20, 2026 | Award | 10,600 | $14.29 | $151.5K | 10.6K | Form 4 ↗ |
Orwin John A director | Apr 20, 2026 | D-Return | 8,250 | $43.91 | $362.3K | 8.3K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
AnaptysBio, Inc. (ANAB) is primarily owned by institutional investors, who hold approximately 73.5% of total shares outstanding. Company insiders own approximately 6.56%, while retail and public investors account for the remaining 19.97%.
The largest institutional shareholder of AnaptysBio, Inc. is ECOR1 CAPITAL, LLC, holding approximately 7.88 million shares — equal to 27.35% of outstanding shares — as of September 30, 2025.
A total of 177 institutional investors currently hold ANAB stock, with a combined institutional value of approximately $980,500,660 as of the most recent 13F filing period.
Frequently asked questions
ANAB ownershipAnaptysBio, Inc. (ANAB) is primarily owned by institutional investors, who hold approximately 73.5% of shares. The largest shareholder is ECOR1 CAPITAL, LLC with a 27.35% stake. Company insiders hold 6.56%. Data sourced from SEC Form 13F as of September 30, 2025.