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ANAB · NASDAQ
$45.43−$3.81 (−7.74%)TodayMarket closed ·
Prev close $49.24
Who owns ANAB
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 59.6% of ANAB’s shares.
- EcoR1 Capital, LLC26.6%
- BlackRock Institutional Trust Company, N.A.5.4%
- Sirenia Capital Management LP5.0%
- Tang Capital Management, LLC4.5%
- Next 6 largest institutions18.1%
- All other shareholders40.4%
| Holder | Shares | % of shares |
|---|---|---|
| EcoR1 Capital, LLC | 7.88M | 26.61% |
| BlackRock Institutional Trust Company, N.A. | 1.59M | 5.37% |
| Sirenia Capital Management LP | 1.49M | 5.04% |
| Tang Capital Management, LLC | 1.33M | 4.49% |
| State Street Investment Management (US) | 1.29M | 4.34% |
| Vanguard Capital Management, LLC | 906.23K | 3.06% |
| Affinity Asset Advisors LLC | 826.11K | 2.79% |
| Sanofi SA | 821.92K | 2.78% |
| Millennium Management LLC | 807.32K | 2.73% |
| Woodline Partners LP | 717.01K | 2.42% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| State Street SPDR S&P Biotech ETF | 830.00K | 2.80% |
| Vanguard Total Stock Market Index Fund | 648.15K | 2.19% |
| iShares Russell 2000 ETF | 512.76K | 1.73% |
| Nuveen Quant Small-Cap Equity Fund | 263.84K | 0.89% |
| Vanguard Extended Market Index Fund | 237.37K | 0.80% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $249.37K (1 trade) of ANAB on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| RENTON HOLLINGS | Option exercise | 5.00K | — |
| RENTON HOLLINGS | Sale | 5.00K | $249.37K |
| RENTON HOLLINGS | Option exercise | 5.00K | $90.15K |
| Orwin John A | Option exercise | 1.30K | — |
| Orwin John A | Option exercise | 1.30K | — |
| Schmid John P. | Option exercise | 6.03K | — |
| Schmid John P. | Option exercise | 6.03K | — |
| Orwin John A | Option exercise | 6.03K | — |
| Orwin John A | Option exercise | 6.03K | — |
| RENTON HOLLINGS | Option exercise | 6.03K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 5.24M
- Days to cover
- 8.19
- % of shares outstanding
- 17.68%
- Average daily volume
- 639.52K
- Change since last report
- −3.7%
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