Alto Neuroscience, Inc. - ANRO
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Alpha Wave Global, LP | History | No change | 3,707,757 | 83,350 | 10.54% | 8.09% | 1 | 0 | 0.0% | Q1 2026 | May 14, 2026 |
| Commodore Capital LP | History | Added to | 2,723,196 | 61,217 | 3.54% | 2.16% | 2 | +900,000 | 49.36% | Q1 2026 | May 15, 2026 |
| Vestal Point Capital, LP | History | Reduced | 2,064,075 | 46,400 | 1.3% | 1.5% | 3 | -420,925 | -16.94% | Q1 2026 | May 15, 2026 |
| PERCEPTIVE ADVISORS LLC | History | Added to | 2,009,893 | 45,182 | 0.88% | 0.57% | 4 | +225,500 | 12.64% | Q1 2026 | May 29, 2026 |
| Spruce Street Capital LP | History | Added to | 1,325,210 | 29,116 | 7.0% | 1.31% | 5 | +1,102,366 | 494.68% | Q1 2026 | May 14, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | History | New | 1,207,025 | 27,133 | 0.0% | — | 6 | +1,207,025 | New | Q1 2026 | May 15, 2026 |
| FRANKLIN RESOURCES INC | History | Reduced | 1,101,874 | 24,770 | 0.01% | 0.0% | 7 | -17,704 | -1.58% | Q1 2026 | May 13, 2026 |
| VANGUARD GROUP INC | History | No change | 1,365,847 | 24,312 | 0.0% | 0.0% | 8 | 0 | 0.0% | Q4 2025 | Jan 29, 2026 |
| Vivo Capital, LLC | History | No change | 1,035,551 | 23,279 | 1.94% | 1.19% | 9 | 0 | 0.0% | Q1 2026 | May 20, 2026 |
| ARMISTICE CAPITAL, LLC | History | Reduced | 912,000 | 20,501 | 0.36% | 0.33% | 10 | -624,000 | -40.63% | Q1 2026 | May 15, 2026 |
| MILLENNIUM MANAGEMENT LLC | History | Added to | 821,982 | 18,478 | 0.01% | 0.0% | 11 | +191,997 | 30.48% | Q1 2026 | May 15, 2026 |
| 72 Investment Holdings, LLC | History | No change | 667,778 | 15,011 | 30.26% | 23.5% | 12 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| BlackRock, Inc. | History | Added to | 666,188 | 14,975 | 0.0% | 0.0% | 13 | +58,314 | 9.59% | Q1 2026 | May 13, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Added to | 637,598 | 14,333 | 0.0% | 0.0% | 14 | +140,442 | 28.25% | Q1 2026 | May 15, 2026 |
| Ikarian Capital, LLC | History | No change | 515,000 | 11,577 | 0.94% | 0.72% | 15 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Point72 Asset Management, L.P. | History | Reduced | 503,087 | 11,309 | 0.01% | 0.03% | 16 | -1,103,867 | -68.69% | Q1 2026 | May 15, 2026 |
| Venrock Adviser, LLC | History | New | 500,000 | 11,240 | 0.42% | — | 18 | +500,000 | New | Q1 2026 | May 15, 2026 |
| Affinity Asset Advisors, LLC | History | New | 500,000 | 11,240 | 0.58% | — | 19 | +500,000 | New | Q1 2026 | May 14, 2026 |
| Integral Health Asset Management, LLC | History | Added to | 500,000 | 11,240 | 0.54% | 0.33% | 17 | +125,000 | 33.33% | Q1 2026 | May 15, 2026 |
| DRIEHAUS CAPITAL MANAGEMENT LLC | History | Added to | 486,726 | 10,942 | 0.08% | 0.04% | 20 | +149,964 | 44.53% | Q1 2026 | May 15, 2026 |
| NORTHERN TRUST CORP | History | Reduced | 473,403 | 10,642 | 0.0% | 0.0% | 21 | -970 | -0.2% | Q1 2026 | May 14, 2026 |
| JENNISON ASSOCIATES LLC | History | New | 386,426 | 8,686 | 0.01% | — | 22 | +386,426 | New | Q1 2026 | May 06, 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | History | New | 385,000 | 8,654 | 0.01% | — | 23 | +385,000 | New | Q1 2026 | May 15, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | History | Added to | 371,208 | 8,346 | 0.0% | 0.0% | 24 | +340,980 | 1128.03% | Q1 2026 | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Added to | 292,899 | 6,587 | 0.0% | 0.0% | 25 | +5,464 | 1.9% | Q1 2026 | May 15, 2026 |
| ALKEON CAPITAL MANAGEMENT LLC | History | Reduced | 227,101 | 5,105 | 0.01% | 0.01% | 26 | -250,000 | -52.4% | Q1 2026 | May 14, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | Added to | 216,099 | 4,857 | 0.0% | 0.0% | 27 | +75,782 | 54.01% | Q1 2026 | May 15, 2026 |
| Qube Research & Technologies Ltd | History | Added to | 209,268 | 4,704 | 0.01% | 0.0% | 28 | +96,476 | 85.53% | Q1 2026 | May 15, 2026 |
| STATE STREET CORP | History | Added to | 199,503 | 4,484 | 0.0% | 0.0% | 29 | +68,838 | 52.68% | Q1 2026 | May 15, 2026 |
| MARSHALL WACE, LLP | History | Reduced | 176,347 | 3,964 | 0.0% | 0.0% | 30 | -16,762 | -8.68% | Q1 2026 | May 14, 2026 |
| AWM Investment Company, Inc. | History | Reduced | 170,000 | 3,821 | 0.42% | 0.39% | 31 | -55,000 | -24.44% | Q1 2026 | May 15, 2026 |
| ORBIMED ADVISORS LLC | History | Added to | 167,500 | 3,765 | 0.07% | 0.05% | 32 | +42,500 | 34.0% | Q1 2026 | May 15, 2026 |
| VANGUARD FIDUCIARY TRUST CO | History | New | 165,272 | 3,715 | 0.0% | — | 33 | +165,272 | New | Q1 2026 | May 08, 2026 |
| BOOTHBAY FUND MANAGEMENT, LLC | History | No change | 139,304 | 3,131 | 0.04% | 0.04% | 34 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| TWO SIGMA ADVISERS, LP | History | No change | 160,100 | 2,849 | 0.01% | 0.01% | 35 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Eversept Partners, LP | History | New | 125,168 | 2,813 | 0.15% | — | 36 | +125,168 | New | Q1 2026 | May 15, 2026 |
| GOLDMAN SACHS GROUP INC | History | Reduced | 104,717 | 2,354 | 0.0% | 0.0% | 37 | -51,602 | -33.01% | Q1 2026 | May 15, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | Added to | 103,499 | 2,326 | 0.0% | 0.0% | 38 | +6,100 | 6.26% | Q1 2026 | May 14, 2026 |
| Saturn V Capital Management LP | History | New | 88,999 | 2,000 | 0.36% | — | 39 | +88,999 | New | Q1 2026 | May 15, 2026 |
| STIFEL FINANCIAL CORP | History | Reduced | 86,335 | 1,940 | 0.0% | 0.0% | 40 | -829 | -0.95% | Q1 2026 | May 12, 2026 |
| Almitas Capital LLC | History | No change | 78,520 | 1,765 | 0.4% | 0.31% | 41 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| JANE STREET GROUP, LLC | History | Reduced | 78,058 | 1,754 | 0.0% | 0.0% | 42 | -163,683 | -67.71% | Q1 2026 | May 12, 2026 |
| MORGAN STANLEY | History | Added to | 68,654 | 1,543 | 0.0% | 0.0% | 43 | +3,073 | 4.69% | Q1 2026 | May 15, 2026 |
| ACADIAN ASSET MANAGEMENT LLC | History | Added to | 60,076 | 1,346 | 0.0% | 0.0% | 44 | +2,530 | 4.4% | Q1 2026 | May 13, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | History | Reduced | 59,799 | 1,344 | 0.0% | 0.0% | 45 | -9,217 | -13.35% | Q1 2026 | May 15, 2026 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | History | Reduced | 52,653 | 1,183 | 0.02% | 0.03% | 46 | -25,000 | -32.19% | Q1 2026 | May 15, 2026 |
| D. E. Shaw & Co., Inc. | History | Reduced | 45,343 | 1,019 | 0.0% | 0.0% | 47 | -79,452 | -63.67% | Q1 2026 | May 15, 2026 |
| TD ASSET MANAGEMENT INC | History | New | 43,800 | 984 | 0.0% | — | 48 | +43,800 | New | Q1 2026 | May 11, 2026 |
| Hudson Bay Capital Management LP | History | Added to | 43,762 | 983 | 0.0% | 0.0% | 49 | +8,973 | 25.79% | Q1 2026 | May 13, 2026 |
| AdvisorShares Investments LLC | History | Reduced | 41,023 | 922 | 0.17% | 0.13% | 50 | -3,054 | -6.93% | Q1 2026 | Apr 28, 2026 |
| 683 Capital Management, LLC | History | Reduced | 40,000 | 899 | 0.05% | 0.05% | 51 | -24,782 | -38.25% | Q1 2026 | May 15, 2026 |
| XTX Topco Ltd | History | Added to | 39,841 | 895 | 0.02% | 0.01% | 52 | +19,017 | 91.32% | Q1 2026 | May 15, 2026 |
| DIMENSIONAL FUND ADVISORS LP | History | Added to | 39,324 | 884 | 0.0% | 0.0% | 53 | +8,148 | 26.14% | Q1 2026 | May 07, 2026 |
| Brevan Howard Capital Management LP | History | New | 38,782 | 871 | 0.01% | — | 54 | +38,782 | New | Q1 2026 | May 15, 2026 |
| Quantinno Capital Management LP | History | Added to | 36,069 | 810 | 0.0% | 0.0% | 55 | +490 | 1.38% | Q1 2026 | May 15, 2026 |
| BALYASNY ASSET MANAGEMENT L.P. | History | Added to | 32,111 | 721 | 0.0% | 0.0% | 56 | +20,991 | 188.77% | Q1 2026 | May 15, 2026 |
| CITADEL ADVISORS LLC | History | Added to | 31,100 | 699 | 0.0% | 0.0% | 57 | +1,327 | 4.46% | Q1 2026 | May 15, 2026 |
| Squarepoint Ops LLC | History | New | 29,961 | 673 | 0.0% | — | 58 | +29,961 | New | Q1 2026 | May 15, 2026 |
| Allianz Asset Management GmbH | History | Reduced | 28,500 | 640 | 0.0% | 0.0% | 59 | -14,500 | -33.72% | Q1 2026 | May 11, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Added to | 25,677 | 577 | 0.0% | 0.0% | 60 | +14,585 | 131.49% | Q1 2026 | May 15, 2026 |
| ALPS ADVISORS INC | History | Reduced | 25,288 | 568 | 0.0% | 0.0% | 61 | -217 | -0.85% | Q1 2026 | May 08, 2026 |
| BARCLAYS PLC | History | Reduced | 25,036 | 562 | 0.0% | 0.0% | 62 | -5,356 | -17.62% | Q1 2026 | May 14, 2026 |
| BROWN ADVISORY INC | History | No change | 25,000 | 562 | 0.0% | 0.0% | 63 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Y-Intercept (Hong Kong) Ltd | History | New | 23,945 | 538 | 0.01% | — | 64 | +23,945 | New | Q1 2026 | Apr 27, 2026 |
| IEQ CAPITAL, LLC | History | Reduced | 23,727 | 533 | 0.0% | 0.0% | 65 | -51,567 | -68.49% | Q1 2026 | May 14, 2026 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | History | New | 23,747 | 533 | 0.0% | — | 66 | +23,747 | New | Q1 2026 | May 15, 2026 |
| UNIVERSITY OF TEXAS/TEXAS AM INVESTMENT MANAGEMENT CO | History | No change | 22,175 | 498 | 0.07% | 0.06% | 67 | 0 | 0.0% | Q1 2026 | May 07, 2026 |
| LANDSCAPE CAPITAL MANAGEMENT, L.L.C. | History | New | 18,083 | 406 | 0.03% | — | 68 | +18,083 | New | Q1 2026 | May 12, 2026 |
| UBS Group AG | History | Reduced | 17,250 | 387 | 0.0% | 0.0% | 69 | -1,239 | -6.7% | Q1 2026 | May 05, 2026 |
| Revisor Wealth Management LLC | History | New | 17,130 | 385 | 0.11% | — | 70 | +17,130 | New | Q1 2026 | Apr 27, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | History | Reduced | 17,018 | 382 | 0.0% | 0.0% | 71 | -46 | -0.27% | Q1 2026 | May 15, 2026 |
| SCS Capital Management LLC | History | Reduced | 16,840 | 378 | 0.0% | 0.01% | 72 | -16,549 | -49.56% | Q1 2026 | May 11, 2026 |
| POLEN CAPITAL MANAGEMENT LLC | History | New | 16,613 | 373 | 0.0% | — | 73 | +16,613 | New | Q1 2026 | May 14, 2026 |
| Vanguard Personalized Indexing Management, LLC | History | Reduced | 15,646 | 351 | 0.0% | 0.0% | 74 | -839 | -5.09% | Q1 2026 | May 14, 2026 |
| AMERICAN CENTURY COMPANIES INC | History | Added to | 14,186 | 318 | 0.0% | 0.0% | 75 | +3,826 | 36.93% | Q1 2026 | May 15, 2026 |
| TORONTO DOMINION BANK | History | New | 13,434 | 301 | 0.0% | — | 76 | +13,434 | New | Q1 2026 | May 15, 2026 |
| Clearstead Advisors, LLC | History | New | 13,312 | 299 | 0.0% | — | 78 | +13,312 | New | Q1 2026 | May 06, 2026 |
| AMERIPRISE FINANCIAL INC | History | Reduced | 13,324 | 299 | 0.0% | 0.0% | 77 | -163 | -1.21% | Q1 2026 | May 15, 2026 |
| Catalyst Funds Management Pty Ltd | History | New | 11,400 | 256 | 0.04% | — | 79 | +11,400 | New | Q1 2026 | May 11, 2026 |
| BANK OF MONTREAL /CAN/ | History | Reduced | 11,343 | 254 | 0.0% | 0.0% | 80 | -12 | -0.11% | Q1 2026 | May 13, 2026 |
| Vanguard Global Advisers, LLC | History | New | 10,649 | 239 | 0.0% | — | 81 | +10,649 | New | Q1 2026 | May 08, 2026 |
| Diametric Capital, LP | History | New | 10,315 | 231 | 0.06% | — | 82 | +10,315 | New | Q1 2026 | May 15, 2026 |
| OMERS ADMINISTRATION Corp | History | Reduced | 9,700 | 218 | 0.0% | 0.0% | 83 | -2,700 | -21.77% | Q1 2026 | May 15, 2026 |
| CITIGROUP INC | History | Reduced | 9,430 | 211 | 0.0% | 0.0% | 84 | -3,136 | -24.96% | Q1 2026 | May 11, 2026 |
| FMR LLC | History | Reduced | 6,314 | 141 | 0.0% | 0.0% | 85 | -60 | -0.94% | Q1 2026 | May 15, 2026 |
| AlphaQuest LLC | History | No change | 3,821 | 68 | 0.0% | 0.0% | 86 | 0 | 0.0% | Q4 2025 | Feb 09, 2026 |
| WHITTIER TRUST CO OF NEVADA INC | History | No change | 2,482 | 55 | 0.0% | 0.0% | 87 | 0 | 0.0% | Q1 2026 | Apr 28, 2026 |
| ROTHSCHILD INVESTMENT LLC | History | Reduced | 1,685 | 37 | 0.0% | 0.0% | 88 | -1,200 | -41.59% | Q1 2026 | May 07, 2026 |
| PNC FINANCIAL SERVICES GROUP, INC. | History | Reduced | 1,206 | 27 | 0.0% | 0.0% | 89 | -101 | -7.73% | Q1 2026 | May 08, 2026 |
| Advisory Services Network, LLC | History | New | 802 | 18 | 0.0% | — | 90 | +802 | New | Q1 2026 | May 15, 2026 |
| WELLS FARGO & COMPANY/MN | History | Added to | 790 | 17 | 0.0% | 0.0% | 91 | +25 | 3.27% | Q1 2026 | May 11, 2026 |
| FEDERATED HERMES, INC. | History | Reduced | 654 | 14 | 0.0% | 0.0% | 92 | -116 | -15.06% | Q1 2026 | May 11, 2026 |
| EverSource Wealth Advisors, LLC | History | Reduced | 628 | 14 | 0.0% | 0.0% | 93 | -33 | -4.99% | Q1 2026 | May 15, 2026 |
| Torren Management, LLC | History | Reduced | 558 | 12 | 0.01% | 0.03% | 94 | -2,926 | -83.98% | Q1 2026 | Apr 30, 2026 |
| JONES FINANCIAL COMPANIES LLLP | History | Added to | 533 | 10 | 0.0% | — | 95 | +500 | 1515.15% | Q1 2026 | May 15, 2026 |
| SIMPLEX TRADING, LLC | History | New | 450 | 10 | 0.0% | — | 96 | +450 | New | Q1 2026 | May 14, 2026 |
| GROUP ONE TRADING LLC | History | Reduced | 400 | 8 | 0.0% | 0.0% | 97 | -1,013 | -71.69% | Q1 2026 | May 13, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | Reduced | 314 | 7 | 0.0% | 0.0% | 99 | -32,921 | -99.06% | Q1 2026 | May 12, 2026 |
| NISA INVESTMENT ADVISORS, LLC | History | No change | 338 | 7 | 0.0% | 0.0% | 98 | 0 | 0.0% | Q1 2026 | Apr 30, 2026 |
| Accent Capital Management, LLC | History | New | 275 | 6 | 0.0% | — | 101 | +275 | New | Q1 2026 | May 11, 2026 |
| Russell Investments Group, Ltd. | History | No change | 306 | 6 | 0.0% | 0.0% | 100 | 0 | 0.0% | Q1 2026 | May 08, 2026 |
| CWM, LLC | History | Reduced | 102 | 2 | 0.0% | 0.0% | 103 | -52 | -33.77% | Q1 2026 | May 14, 2026 |
| US BANCORP \DE\ | History | Reduced | 110 | 2 | 0.0% | 0.0% | 102 | -3 | -2.65% | Q1 2026 | May 14, 2026 |
| Global Retirement Partners, LLC | History | No change | 150 | 2 | 0.0% | 0.0% | 104 | 0 | 0.0% | Q4 2025 | Feb 06, 2026 |
| Tower Research Capital LLC (TRC) | History | Reduced | 65 | 1 | 0.0% | 0.0% | 106 | -1,922 | -96.73% | Q1 2026 | May 15, 2026 |
| ROYAL BANK OF CANADA | History | Added to | 41 | 1 | 0.0% | 0.0% | 105 | +7 | 20.59% | Q1 2026 | May 15, 2026 |
| Cornerstone Financial Management LLC | History | No change | 69 | 1 | 0.0% | 0.0% | 107 | 0 | 0.0% | Q1 2026 | May 08, 2026 |
| Peapod Lane Capital LLC | History | Closed out | 0 | 0 | — | 3.85% | — | -253,992 | -100.0% | Q1 2026 | May 01, 2026 |
| Artia Global Partners LP | History | Closed out | 0 | 0 | — | 0.07% | — | -29,192 | -100.0% | Q1 2026 | May 15, 2026 |
| CITIZENS FINANCIAL GROUP INC/RI | History | Closed out | 0 | 0 | — | 0.01% | — | -28,190 | -100.0% | Q1 2026 | May 01, 2026 |
| AlphaCore Capital LLC | History | Closed out | 0 | 0 | — | 0.01% | — | -20,000 | -100.0% | Q1 2026 | May 15, 2026 |
| ExodusPoint Capital Management, LP | History | Closed out | 0 | 0 | — | 0.0% | — | -18,786 | -100.0% | Q1 2026 | May 14, 2026 |
| SIGNATUREFD, LLC | History | Reduced | 41 | 0 | — | 0.0% | — | -1,024 | -96.15% | Q1 2026 | Apr 07, 2026 |
| Fortitude Family Office, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -511 | -100.0% | Q1 2026 | Apr 15, 2026 |
| North Star Investment Management Corp. | History | Closed out | 0 | 0 | — | 0.0% | — | -174 | -100.0% | Q1 2026 | Apr 23, 2026 |
| JPMORGAN CHASE & CO | History | Reduced | 46 | 0 | — | 0.0% | — | -100 | -68.49% | Q1 2026 | May 13, 2026 |
| Farther Finance Advisors, LLC | History | Reduced | 11 | 0 | — | — | — | -20 | -64.52% | Q1 2026 | Apr 07, 2026 |
| Optiver Holding B.V. | History | Reduced | 4 | 0 | — | — | — | -16 | -80.0% | Q1 2026 | Jun 02, 2026 |
| OSAIC HOLDINGS, INC. | History | New | 3 | 0 | — | — | — | +3 | New | Q1 2026 | May 15, 2026 |
| Arax Advisory Partners | History | No change | 5 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 13, 2026 |
| SHP Wealth Management | History | No change | 25 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 08, 2026 |
| SBI Securities Co., Ltd. | History | No change | 12 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | Apr 27, 2026 |