ANRO: Alto Neuroscience, Inc. insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 3 sales totaling $3.57M in the last 180 days.
Insider sales
| Trade date | Insider | Role | Value | 10b5-1 plan |
|---|---|---|---|---|
| 2026-09-30 | Smith Nicholas Conrad | CFO | $597K | |
| 2026-09-30 | Smith Nicholas Conrad | CFO | $24K | |
| 2026-09-29 | Smith Nicholas Conrad | CFO | $2.95M |
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-08-14 | 13G amendment | Perceptive Advisors LLC | 9.99% | SEC | |
| 2026-08-14 | Fell below 5% | Vestal Point Capital, LP | 2.20% | SEC | |
| 2026-08-14 | 13G amendment | Sirenia Capital Management LP | 6.20% | SEC | |
| 2026-07-27 | New 13G stake | BlackRock, Inc. | 6.00% | SEC |
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