Alto Neuroscience Inc

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Alto Neuroscience Inc
TickerANRO
CIK #0001999480
CUSIP02157Q109
SectorLife Sciences - Pharmaceutical Preparations
Address369 South San Antonio Rd, Los Altos, CA 94022
Source [EDGAR]
Reg D Offering (Form D) Filed Raised Terms
Alto Neuroscience Inc 2025-10-27 50.0 M Exemption: 506(b) · Duration: One year or less · Revenue: No Revenues
CIK Filing 2011 - 2026
[0001999480] 10-K
[0001999480] 10-Q
[0001999480] 3
[0001999480] 4
[0001999480] 8-K
[0001999480] D
[0001999480] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
EcoR1 Capital LLC Alto Neuroscience Inc [2026-07-20] 0.0
Sirenia Capital Management LP Alto Neuroscience Inc [2026-05-15] 0.0
Vestal Point Capital LP Alto Neuroscience Inc [2026-02-17] 0.0
Commodore Capital LP Alto Neuroscience Inc [2025-10-27] 0.0
Perceptive Advisors LLC Alto Neuroscience Inc [2025-10-10] 0.0
Armistice Capital LLC Alto Neuroscience Inc [2025-05-15] 0.0
K2 Healthventures Equity Trust LLC Alto Neuroscience Inc [2025-05-15] 0.0
Etkin Amit Alto Neuroscience Inc [2024-11-14] 81945.4
FMR LLC Alto Neuroscience Inc [2024-11-12] 0.0
BlackRock Inc Alto Neuroscience Inc [2024-11-08] 5.4
BlackRock Inc Alto Neuroscience Inc [2024-10-21] 5.4
RA Capital Management LP Alto Neuroscience Inc [2024-03-29] 5.2
Alpha Wave Global LP Alto Neuroscience Inc [2024-02-09] 13.8
Point72 Asset Management LP Alto Neuroscience Inc [2024-02-07] 3.8
Form 3/4/5 Filer 2011 - 2026
Alto Neuroscience Inc
Miller Andrew Craig
Etkin Amit
Dreyfus Andrew
Manji Husseini
York Gwill
Cox Christopher Nixon
Sanchez Ramiro
Smith Nicholas Conrad
Hanley Jr Michael Conick
Savitz Adam
Radhakrishnan Maha
Apeiron Investment Group Ltd
Apeiron Presight Capital Fund II LP
Angermayer Christian
Lunate Holding RSC Ltd
Alpha Wave Global LP
Chimera Investment LLC
Alpha Wave Ventures GP Ltd
Chen PO Yu Jeff
Alkeon Capital Management LLC
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Etkin Amit
Common Stock
2026-03-01 Tax withheld 6,227 $19.69 122,610
Smith Nicholas Conrad
Common Stock
2026-03-01 Tax withheld 2,806 $19.69 55,250
Etkin Amit
Employee Stock Option (Right to Buy) · derivative
2026-02-11 Grant 306,000 $0.00
Savitz Adam
Employee Stock Option (Right to Buy) · derivative
2026-02-11 Grant 124,000 $0.00
Smith Nicholas Conrad
Employee Stock Option (Right to Buy) · derivative
2026-02-11 Grant 200,000 $0.00
Hanley Jr Michael Conick
Employee Stock Option (Right to Buy) · derivative
2026-02-11 Grant 131,000 $0.00
York Gwill
Stock Option (right to buy) · derivative
2026-01-02 Grant 5,243 $11.82 61,972
Cox Christopher Nixon
Stock Option (right to buy) · derivative
2026-01-02 Grant 7,189 $11.82 84,974
Manji Husseini
Employee Stock Option (right to buy) · derivative
2026-01-02 Grant 4,228 $11.82 49,975
Sanchez Ramiro
Stock Option (right to buy) · derivative
2026-01-02 Grant 3,806 $11.82 44,987
Sanchez Ramiro
Stock Option (right to buy) · derivative
2025-08-12 Grant 3,928 $2.21 8,681
Sanchez Ramiro
Stock Option (right to buy) · derivative
2025-08-12 Grant 30,574 $0.00
Savitz Adam
Employee Stock Option (Right to Buy) · derivative
2025-07-03 Grant 123,645
Savitz Adam
Employee Stock Option (Right to Buy) · derivative
2025-07-03 Disposed to issuer 33,008
Savitz Adam
Employee Stock Option (Right to Buy) · derivative
2025-07-03 Grant 33,008
Savitz Adam
Employee Stock Option (Right to Buy) · derivative
2025-07-03 Disposed to issuer 22,481
Savitz Adam
Employee Stock Option (Right to Buy) · derivative
2025-07-03 Grant 22,481
Etkin Amit
Employee Stock Option (Right to Buy) · derivative
2025-07-03 Disposed to issuer 215,000
Etkin Amit
Employee Stock Option (Right to Buy) · derivative
2025-07-03 Grant 215,000
Etkin Amit
Employee Stock Option (Right to Buy) · derivative
2025-07-03 Disposed to issuer 223,000
showing 20 of 107 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 111 26,968,262
2025-12-31 97 24,930,536
2025-09-30 77 16,966,121
2025-06-30 82 17,322,697
2025-03-31 84 20,884,693
2024-12-31 78 22,612,440
2024-09-30 84 22,608,256
2024-06-30 59 17,132,229
2024-03-31 54 14,802,936
Form 13F Holdings
Firm Period DFND Voting Shares
GK Wealth Management LLC [2026-06-30] DFND 0 8,565
Torren Management LLC [2026-06-30] SOLE 0 558
Farther Finance Advisors LLC [2026-06-30] SOLE 0 11
Gamma Investing LLC [2026-06-30] DFND 8 8
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