| Investor | Value | Of portfolio | Shares | Change | Quarter |
|---|---|---|---|---|---|
| Renaissance Technologies | $1.9M | 0.00% | 71.40K | −31% | Q2 2026 |
From each investor's quarterly 13F filing with the SEC: positions at the quarter's end, reported up to 45 days later. All investors
No member of Congress has disclosed a ANRO trade since 2025.
From House and Senate STOCK Act reports. Members disclose trades, not holdings, as value ranges up to 45 days later, so amounts are estimates and “last move” is a hint at who still holds it, not a position. All recent congress trades
| Date | Insider | Transaction | Shares | Value |
|---|---|---|---|---|
| Oct 1, 2026 | Smith Nicholas ConradPresident | Conversion of Exercise of derivative security at price 2.32 per share. | 55K | $127.60K |
| May 13, 2026 | Etkin AmitChief Executive Officer | Stock Gift at price 0.00 per share. | 400K | — |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | -13.0 | 27.2 | 14.2 | 14.1 | -21.8 | 31.5 | 2.6 | 30.7 | -27.8 | -13.5 | +24.1% | ||
| 2025 | 1.4 | -34.7 | -22.9 | 15.3 | 3.6 | -14.7 | 39.5 | 19.9 | 9.2 | 253.0 | -2.4 | 28.5 | +320.8% |
| 2024 | -0.3 | 1.0 | -22.9 | -10.6 | 0.8 | 18.8 | -10.7 | -66.0 | 13.4 | -4.1 | −72.5% |
Alto Neuroscience, Inc. operates as a clinical-stage biopharmaceutical company in the United States. The company's product pipeline includes ALTO-100, which is in Phase 2b clinical trial for the treatment of patients with bipolar depression (BPD). It also develops ALTO-300, a small molecule melatonergic agonist and serotonergic antagonist with antidepressant properties, which is in Phase 2b clinical trial to treat patients with major depressive disorder (MDD); ALTO-101, a novel small molecule phosphodiesterase 4 inhibitor that is in Phase 2 proof-of-concept (POC) trial for the treatment of cognitive impairment associated with schizophrenia; ALTO-203, a novel small-molecule histamine H3 receptor inverse agonist, which is in Phase 2 POC trial to treat patients with MDD and higher levels of anhedonia; ALTO-202, an investigational orally bioavailable antagonist of the GluN2B subunit of the NMDA receptor that is in Phase 1 clinical trial for the treatment of MDD; and ALTO-208, a fixed-dose combination of pramipexole and aprepitant, an antiemetic, neurokinin-1 (NK-1) receptor antagonist for patients with Parkinson's disease for patients with Parkinson's disease. The company was incorporated in 2019 and is headquartered in Mountain View, California.
Buy / hold / sell counts