Alto Neuroscience
ANRO · NYSE
$24.41+$1.59 (+6.97%)TodayMarket closed ·
Prev close $22.82
Who owns ANRO
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 51.5% of ANRO’s shares.
- Alpha Wave Global, LP9.5%
- Commodore Capital LP7.0%
- EcoR1 Capital, LLC5.7%
- Sirenia Capital Management LP5.7%
- Next 6 largest institutions23.5%
- All other shareholders48.5%
| Holder | Shares | % of shares |
|---|---|---|
| Alpha Wave Global, LP | 3.71M | 9.55% |
| Commodore Capital LP | 2.72M | 7.01% |
| EcoR1 Capital, LLC | 2.23M | 5.75% |
| Sirenia Capital Management LP | 2.22M | 5.72% |
| BlackRock Institutional Trust Company, N.A. | 1.97M | 5.06% |
| Perceptive Advisors LLC | 1.61M | 4.15% |
| Adage Capital Management, L.P. | 1.60M | 4.12% |
| Vanguard Capital Management, LLC | 1.39M | 3.58% |
| Spruce Street Capital LP | 1.35M | 3.48% |
| Vivo Capital, LLC | 1.21M | 3.11% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 1.01M | 2.61% |
| iShares Russell 2000 ETF | 669.47K | 1.72% |
| Franklin Templeton Investment Funds -Biotechnology Discovery | 645.53K | 1.66% |
| Franklin Biotechnology Discovery Fund | 367.73K | 0.95% |
| Vanguard Extended Market Index Fund | 347.15K | 0.89% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $3.57M (3 trades) of ANRO on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Smith Nicholas Conrad | Option exercise | 55.00K | — |
| Smith Nicholas Conrad | Option exercise | 55.00K | $127.60K |
| Smith Nicholas Conrad | Option exercise | 24.06K | — |
| Smith Nicholas Conrad | Sale | 886 | $23.81K |
| Smith Nicholas Conrad | Sale | 23.17K | $597.29K |
| Smith Nicholas Conrad | Option exercise | 24.06K | $56.53K |
| Smith Nicholas Conrad | Option exercise | 54.38K | — |
| Smith Nicholas Conrad | Option exercise | 56.45K | — |
| Smith Nicholas Conrad | Sale | 110.83K | $2.95M |
| Smith Nicholas Conrad | Option exercise | 54.38K | $127.78K |
Short interest
Settled Sep 30, 2026
- Shares short
- 4.66M
- Days to cover
- 6.49
- % of shares outstanding
- 12.00%
- Average daily volume
- 718.19K
- Change since last report
- +11.6%
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