Alto Neuroscience, Inc.: which funds bought and sold
Institutions that bought and sold Alto Neuroscience shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 66 institutions that filed 13F reports for both quarters added to or opened positions in Alto Neuroscience, and 49 cut or closed them. Together they added a net 2.6M shares, +9.8% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 1.6M shares (−9.3%); index fund managers were net buyers of 3.0M shares (+98.4%). 27 opened a new position and 22 sold out entirely.
Bought, Q2 2026 66 institutions, 27 of them new holders Sold, Q2 2026 49 institutions, 22 of them sold out
Net change, all compared +2.6M shares (+9.8%)
Net change, active managers −1.6M shares (−9.3%), 10 bought, 23 sold
Buyers versus sellers
66 bought 21 49 sold
Active managers and hedge funds 10 bought · 23 sold · −1.6M
Index fund managers 9 bought · 1 sold · +3.0M
Other institutions 47 bought · 25 sold · +1.3M
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Blackrock, Inc. Index funds | +1.5M +218.4% | 2.1M | $56M |
| Adage Capital Partners Gp, L.L.C. Hedge fund | +1.2M +315.6% | 1.6M | $42.2M |
| State Street Corp Index funds | +486K +243.8% | 686K | $18.1M |
| Parkman Healthcare Partners LLC | +429K New position | 429K | $11.3M |
| Geode Capital Management, LLC Index funds | +385K +131.5% | 678K | $17.9M |
| Affinity Asset Advisors, LLC | +350K +70.0% | 850K | $22.4M |
| Schonfeld Strategic Advisors LLC Hedge fund | +258K New position | 258K | $6.8M |
| Vanguard Capital Management LLC Index funds | +182K +15.1% | 1.4M | $36.7M |
| Vanguard Portfolio Management LLC Index funds | +181K New position | 181K | $4.8M |
| Ameriprise Financial Inc | +178K +1333.5% | 191K | $5M |
| Vivo Capital, LLC | +173K +16.7% | 1.2M | $31.9M |
| Northern Trust Corp Index funds | +159K +33.6% | 633K | $16.7M |
| Goldman Sachs Group Inc | +132K +126.2% | 237K | $6.2M |
| Saturn V Capital Management LP | +94K +105.4% | 183K | $4.8M |
| Orbimed Advisors LLC | +90K +53.9% | 258K | $6.8M |
| Bank Of New York Mellon Corp | +76K New position | 76K | $2M |
| Charles Schwab Investment Management Inc Index funds | +64K +373.5% | 81K | $2.1M |
| Nuveen, LLC | +62K New position | 62K | $1.6M |
| Marshall Wace, LLP Hedge fund | +49K +27.9% | 226K | $6M |
| Vanguard Fiduciary Trust Co Index funds | +46K +27.8% | 211K | $5.6M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Adage Capital Partners Gp, L.L.C. Hedge fund | +1.2M +315.6% | 1.6M | $42.2M |
| Schonfeld Strategic Advisors LLC Hedge fund | +258K New position | 258K | $6.8M |
| Marshall Wace, LLP Hedge fund | +49K +27.9% | 226K | $6M |
| Alliancebernstein L.P. Active manager | +27K New position | 27K | $613,704 |
| American Century Companies Inc Active manager | +13K +89.1% | 27K | $707,780 |
| Wellington Management Group LLP Active manager | +11K +18.6% | 71K | $1.9M |
| Eversept Partners, LP Hedge fund | +3,118 +2.5% | 128K | $3.4M |
| Los Angeles Capital Management LLC Active manager | +1,006 New position | 1,006 | $26,548 |
| Driehaus Capital Management LLC Active manager | +850 +0.2% | 488K | $12.9M |
| FMR LLC Active manager | +11 +0.2% | 6,325 | $166,911 |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Vestal Point Capital, LP Hedge fund | −1.3M −62.0% | 785K | $20.7M |
| Perceptive Advisors LLC Hedge fund | −400K −19.9% | 1.6M | $42.5M |
| Jennison Associates LLC Active manager | −386K Sold out | 0 | — |
| Millennium Management LLC Hedge fund | −264K −32.1% | 558K | $14.7M |
| Susquehanna International Group, LLP | −231K −96.6% | 7,998 | $211,067 |
| Qube Research & Technologies Ltd Hedge fund | −209K Sold out | 0 | — |
| Alkeon Capital Management LLC Hedge fund | −125K −55.0% | 102K | $2.7M |
| Ikarian Capital, LLC | −108K −20.9% | 407K | $10.7M |
| Awm Investment Company, Inc. | −90K −52.9% | 80K | $2.1M |
| Franklin Resources Inc Active manager | −89K −8.0% | 1.0M | $26.7M |
| Almitas Capital LLC | −79K Sold out | 0 | — |
| Two Sigma Investments, LP Hedge fund | −69K −31.8% | 147K | $3.9M |
| Armistice Capital, LLC Hedge fund | −48K −5.3% | 864K | $22.8M |
| D. E. Shaw & Co., Inc. Hedge fund | −45K Sold out | 0 | — |
| Hudson Bay Capital Management LP Hedge fund | −44K Sold out | 0 | — |
| 683 Capital Management, LLC Hedge fund | −40K Sold out | 0 | — |
| Brevan Howard Capital Management LP Hedge fund | −39K Sold out | 0 | — |
| Boothbay Fund Management, LLC Hedge fund | −33K −23.7% | 106K | $2.8M |
| Balyasny Asset Management L.P. Hedge fund | −32K Sold out | 0 | — |
| Renaissance Technologies LLC Hedge fund | −32K −31.0% | 71K | $1.9M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Vestal Point Capital, LP Hedge fund | −1.3M −62.0% | 785K | $20.7M |
| Perceptive Advisors LLC Hedge fund | −400K −19.9% | 1.6M | $42.5M |
| Jennison Associates LLC Active manager | −386K Sold out | 0 | — |
| Millennium Management LLC Hedge fund | −264K −32.1% | 558K | $14.7M |
| Qube Research & Technologies Ltd Hedge fund | −209K Sold out | 0 | — |
| Alkeon Capital Management LLC Hedge fund | −125K −55.0% | 102K | $2.7M |
| Franklin Resources Inc Active manager | −89K −8.0% | 1.0M | $26.7M |
| Two Sigma Investments, LP Hedge fund | −69K −31.8% | 147K | $3.9M |
| Armistice Capital, LLC Hedge fund | −48K −5.3% | 864K | $22.8M |
| D. E. Shaw & Co., Inc. Hedge fund | −45K Sold out | 0 | — |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Parkman Healthcare Partners LLC | 429K | $11.3M |
| Schonfeld Strategic Advisors LLCHedge fund | 258K | $6.8M |
| Vanguard Portfolio Management LLCIndex funds | 181K | $4.8M |
| Bank Of New York Mellon Corp | 76K | $2M |
| Nuveen, LLC | 62K | $1.6M |
| Rhumbline AdvisersIndex funds | 32K | $834,866 |
| Deutsche Bank Ag\ | 26K | $687,486 |
| Alliancebernstein L.P.Active manager | 27K | $613,704 |
| Metlife Investment Management, LLC | 16K | $412,845 |
| Virtus Investment Advisers, LLC | 15K | $402,157 |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Jennison Associates LLCActive manager | 386K | $8.7M |
| Qube Research & Technologies LtdHedge fund | 209K | $4.7M |
| Almitas Capital LLC | 79K | $1.8M |
| D. E. Shaw & Co., Inc.Hedge fund | 45K | $1M |
| Hudson Bay Capital Management LPHedge fund | 44K | $983,770 |
| 683 Capital Management, LLCHedge fund | 40K | $899,200 |
| Brevan Howard Capital Management LPHedge fund | 39K | $871,819 |
| Balyasny Asset Management L.P.Hedge fund | 32K | $721,855 |
| Jane Street Group, LLC | 30K | $675,704 |
| Y-Intercept (Hong Kong) Ltd | 24K | $538,284 |
Who holds the shares
- Institutions reporting
- 114
- Ten largest holders
- 59.7% of 13F-reported shares
- Index fund managers
- 20.4% of 13F-reported shares
- Active managers and hedge funds
- 52.7% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 10 | 23 | 3 | 8 | −1.6M | −9.3% |
| Index fund managers | 9 | 1 | 2 | 0 | +3.0M | +98.4% |
| Other institutions | 47 | 25 | 22 | 14 | +1.3M | +18.9% |