Upgrade to SI Premium - Free Trial

Form SCHEDULE 13G Alto Neuroscience, Inc. Filed by: EcoR1 Capital, LLC

July 20, 2026 5:11 PM





Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)




schemaVersion:


SCHEDULE 13G




Comment for Type of Reporting Person: Percentage calculated based on 38,829,167 shares of Common Stock outstanding following the closing of the offering of the Issuer's Common Stock reported in the Prospectus filed by the Issuer on July 14, 2026.


SCHEDULE 13G




Comment for Type of Reporting Person: Percentage calculated based on 38,829,167 shares of Common Stock outstanding following the closing of the offering of the Issuer's Common Stock reported in the Prospectus filed by the Issuer on July 14, 2026.


SCHEDULE 13G




Comment for Type of Reporting Person: Percentage calculated based on 38,829,167 shares of Common Stock outstanding following the closing of the offering of the Issuer's Common Stock reported in the Prospectus filed by the Issuer on July 14, 2026.


SCHEDULE 13G



EcoR1 Capital, LLC
Signature:/s/ Oleg Nodelman
Name/Title:Manager
Date:07/20/2026
Oleg Nodelman
Signature:/s/ Oleg Nodelman
Name/Title:Reporting person
Date:07/20/2026
EcoR1 Capital Fund Qualified, L.P.
Signature:/s/ Oleg Nodelman
Name/Title:Manager of the General Partner, EcoR1 Capital, LLC
Date:07/20/2026
Exhibit Information

EXHIBIT 99 - AGREEMENT REGARDING JOINT FILING OF STATEMENT ON SCHEDULE 13D OR 13G

ATTACHMENTS / EXHIBITS

ex991.htm

Categories

SEC Filings