Skip to main content
Equibles

ANRO

Alto Neuroscience, Inc.

Company with tickers: ANRO

CIK
1999480
CUSIP
02157Q109
Shares Outstanding
35,093,940
13F Activity (30d)
92 filings 90 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 111
Total Value: $613,904,039
Total Shares: 27,308,901
Showing 1–100 of 114 holdings by value · page 1 of 2

Institutional Ownership Trend

10 quarters

Holder Concentration

Across 111 13F filers · Δ vs Dec 31, 2025
Top Holder
13.6%
Mar 2024 → Mar 2026 · range 13.6% – 43.4%
−1.3 pts
Top 5
43.3%
Mar 2024 → Mar 2026 · range 43.3% – 73.8%
−2.4 pts
Top 10
61.9%
Mar 2024 → Mar 2026 · range 61.9% – 91.0%
−6.8 pts
HHI
542
Mar 2024 → Mar 2026 · range 542 – 2,193
Broadly held−78

Quarterly Activity

vs Dec 31, 2025
New
25
Increased
28
Decreased
43
Sold Out
11
Unchanged
15
Holder count: +14
Institutional value: +38.3%
Shares held: +9.5%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Small Spruce Street Capital LP +1,102,366 1,325,210
Mid Commodore Capital LP +900,000 2,723,196
Mega PRICE T ROWE ASSOCIATES INC /MD/ +340,980 371,208
Mid PERCEPTIVE ADVISORS LLC +225,500 2,009,893
Mega MILLENNIUM MANAGEMENT LLC +191,997 821,982

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Large Point72 Asset Management, L.P. −1,103,867 503,087
Mid ARMISTICE CAPITAL, LLC −624,000 912,000
Mid Vestal Point Capital, LP −420,925 2,064,075
Large ALKEON CAPITAL MANAGEMENT LLC −250,000 227,101
Mega JANE STREET GROUP, LLC −163,683 78,058

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 1,207,025 $27,133,922
Mid Venrock Adviser, LLC 500,000 $11,240,000
Mid Affinity Asset Advisors, LLC 500,000 $11,240,000
Mega JENNISON ASSOCIATES LLC 386,426 $8,686,856
Large ADAGE CAPITAL PARTNERS GP, L.L.C. 385,000 $8,654,800

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 1,365,847 $24,312,075
Small Peapod Lane Capital LLC 253,992 $4,521,057
Large TWO SIGMA ADVISERS, LP 160,100 $2,849,780
Small Artia Global Partners LP 29,192 $519,617
Mid CITIZENS FINANCIAL GROUP INC/RI 28,190 $501,782
Filter: New 25 Increased 28 Reduced 43 Sold out 11 Unchanged 15
Showing 100 of 114
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Small Alpha Wave Global, LP $83,350,377 13.58% 3,707,757
Mid Commodore Capital LP $61,217,446 9.97% 2,723,196
Mid Vestal Point Capital, LP $46,400,406 7.56% 2,064,075
Mid PERCEPTIVE ADVISORS LLC $45,182,394 7.36% 2,009,893
Small Spruce Street Capital LP $29,790,720 4.85% 1,325,210
Mega VANGUARD CAPITAL MANAGEMENT LLC $27,133,922 4.42% 1,207,025
Mega FRANKLIN RESOURCES INC $24,770,127 4.03% 1,101,874
Mid Vivo Capital, LLC $23,279,186 3.79% 1,035,551
Mid ARMISTICE CAPITAL, LLC $20,501,760 3.34% 912,000
Mega MILLENNIUM MANAGEMENT LLC $18,478,155 3.01% 821,982
Micro 72 Investment Holdings, LLC $15,011,649 2.45% 667,778
Mega BlackRock, Inc. $14,975,905 2.44% 666,188
Mid Ikarian Capital, LLC $11,577,200 1.89% 515,000
Large Point72 Asset Management, L.P. $11,309,395 1.84% 503,087
Mid Venrock Adviser, LLC $11,240,000 1.83% 500,000
Mid Affinity Asset Advisors, LLC $11,240,000 1.83% 500,000
Mid Integral Health Asset Management, LLC $11,240,000 1.83% 500,000
Large Driehaus Capital Management LLC $10,941,600 1.78% 486,726
Mega NORTHERN TRUST CORP Bank $10,642,099 1.73% 473,403
Mega JENNISON ASSOCIATES LLC $8,686,856 1.42% 386,426
Large ADAGE CAPITAL PARTNERS GP, L.L.C. $8,654,800 1.41% 385,000
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $8,618,832 1.40% 383,400
Mega PRICE T ROWE ASSOCIATES INC /MD/ $8,344,755 1.36% 371,208
Mega GEODE CAPITAL MANAGEMENT, LLC $6,584,369 1.07% 292,899
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $5,361,435 0.87% 238,498
Large ALKEON CAPITAL MANAGEMENT LLC $5,105,230 0.83% 227,101
Mega TWO SIGMA INVESTMENTS, LP $4,857,905 0.79% 216,099
Large Qube Research & Technologies Ltd $4,704,344 0.77% 209,268
Mega STATE STREET CORP $4,484,827 0.73% 199,503
Large MARSHALL WACE, LLP $3,964,280 0.65% 176,347
Small AWM Investment Company, Inc. $3,821,600 0.62% 170,000
Mid ORBIMED ADVISORS LLC $3,765,400 0.61% 167,500
Mega VANGUARD FIDUCIARY TRUST CO Bank $3,715,314 0.61% 165,272
Mid BOOTHBAY FUND MANAGEMENT, LLC $3,131,553 0.51% 139,304
Mid Eversept Partners, LP $2,813,776 0.46% 125,168
Mega GOLDMAN SACHS GROUP INC $2,354,037 0.38% 104,717
Large RENAISSANCE TECHNOLOGIES LLC $2,326,657 0.38% 103,499
Small Saturn V Capital Management LP $2,000,697 0.33% 88,999
Large STIFEL FINANCIAL CORP $1,940,810 0.32% 86,335
Small Almitas Capital LLC $1,765,129 0.29% 78,520
Mega MORGAN STANLEY $1,543,339 0.25% 68,654
Large ACADIAN ASSET MANAGEMENT LLC $1,350,508 0.22% 60,076
Mega WELLINGTON MANAGEMENT GROUP LLP $1,344,280 0.22% 59,799
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $1,183,639 0.19% 52,653
Mega JANE STREET GROUP, LLC $1,079,040 0.18% 48,000
Mega D. E. Shaw & Co., Inc. $1,019,310 0.17% 45,343
Mega TD Asset Management Inc $984,624 0.16% 43,800
Large Hudson Bay Capital Management LP $983,769 0.16% 43,762
Small AdvisorShares Investments LLC $922,197 0.15% 41,023
Mid 683 Capital Management, LLC $899,200 0.15% 40,000
Mid XTX Topco Ltd $895,625 0.15% 39,841
Mega DIMENSIONAL FUND ADVISORS LP $884,002 0.14% 39,324
Mid Brevan Howard Capital Management LP $871,819 0.14% 38,782
Large Quantinno Capital Management LP $810,831 0.13% 36,069
Large Balyasny Asset Management L.P. $721,855 0.12% 32,111
Mega CITADEL ADVISORS LLC $699,128 0.11% 31,100
Mega JANE STREET GROUP, LLC $675,702 0.11% 30,058
Large Squarepoint Ops LLC $673,523 0.11% 29,961
Large Allianz Asset Management GmbH $640,680 0.10% 28,500
Mega BANK OF AMERICA CORP /DE/ Bank $577,218 0.09% 25,677
Large ALPS ADVISORS INC $568,474 0.09% 25,288
Mega BARCLAYS PLC $562,809 0.09% 25,036
Large BROWN ADVISORY INC $562,000 0.09% 25,000
Mid Y-Intercept (Hong Kong) Ltd $538,283 0.09% 23,945
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $533,832 0.09% 23,747
Large IEQ CAPITAL, LLC $533,382 0.09% 23,727
Small UNIVERSITY OF TEXAS/TEXAS AM INVESTMENT MANAGEMENT CO Endowment $498,494 0.08% 22,175
Mid LANDSCAPE CAPITAL MANAGEMENT, L.L.C. $406,505 0.07% 18,083
Mega UBS Group AG $387,779 0.06% 17,250
Small Revisor Wealth Management LLC $385,082 0.06% 17,130
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $382,564 0.06% 17,018
Mid SCS Capital Management LLC $378,563 0.06% 16,840
Large POLEN CAPITAL MANAGEMENT LLC $373,460 0.06% 16,613
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $352,936 0.06% 15,700
Mid Vanguard Personalized Indexing Management, LLC $351,722 0.06% 15,646
Mega AMERICAN CENTURY COMPANIES INC $318,901 0.05% 14,186
Large TORONTO DOMINION BANK Bank $301,996 0.05% 13,434
Mega AMERIPRISE FINANCIAL INC $299,523 0.05% 13,324
Mid Clearstead Advisors, LLC $299,253 0.05% 13,312
Small Catalyst Funds Management Pty Ltd $256,272 0.04% 11,400
Mega BANK OF MONTREAL /CAN/ Bank $254,990 0.04% 11,343
Mega Vanguard Global Advisers, LLC $239,389 0.04% 10,649
Small Diametric Capital, LP $231,881 0.04% 10,315
Large OMERS ADMINISTRATION Corp $218,056 0.04% 9,700
Mega CITIGROUP INC $211,986 0.03% 9,430
Mega FMR LLC $141,937 0.02% 6,314
Mid WHITTIER TRUST CO OF NEVADA INC Bank $55,795 0.01% 2,482
Mid ROTHSCHILD INVESTMENT LLC $37,878 0.01% 1,685
Mega PNC FINANCIAL SERVICES GROUP, INC. $27,110 0.00% 1,206
Mid Advisory Services Network, LLC $18,028 0.00% 802
Mega WELLS FARGO & COMPANY/MN $17,759 0.00% 790
Large FEDERATED HERMES, INC. $14,701 0.00% 654
Mid EverSource Wealth Advisors, LLC $14,117 0.00% 628
Micro Torren Management, LLC $12,543 0.00% 558
Large JONES FINANCIAL COMPANIES LLLP $11,981 0.00% 533
Mid SIMPLEX TRADING, LLC $10,116 0.00% 450
Mid GROUP ONE TRADING LLC $8,992 0.00% 400
Large NISA INVESTMENT ADVISORS, LLC $7,598 0.00% 338
Mega BNP PARIBAS ARBITRAGE, SA $7,058 0.00% 314
Large Russell Investments Group, Ltd. $6,878 0.00% 306

Report a Problem

Category
Description
Email (optional, for follow-up)