Alto Neuroscience, Inc. - ANRO

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q1 2026 · Compare: Q4 2025
13D/13G major owners: Ownership tab.
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