SCHEDULE 13G Filed 2026-07-20 Event — SEC 0000935836-26-000361 →

EcoR1 Capital, LLC → Alto Neuroscience, Inc. ANRO

Stake: — Shares: — Class: Comon Stock

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

6 transactions

0 buys · 3 sales · 3 awards/exercises

Issuer Cluster

2 13D/G filings on this issuer

1 other filing besides this one

Filer Track Record

13 filings by this filer

12 other filings in the data moat

Short Interest · settle 2026-09-30

DTC 6.49

4,660,269 shares short · +11.7% vs prior

Institutional Consensus · 2025-12-31

Held by elite portfolio managers

1 holder · $28.60M

Point72 Asset Mgmt

Form 4 Insider Transactions · last 365d

Date	Insider	Role	Type	Shares	Price	Value
2026-09-30	Smith Nicholas Conrad	officer	Option exercise	24,056	$2.35	$57K
2026-09-30	Smith Nicholas Conrad	officer	Sale	23,170	$25.78	$597K
2026-09-30	Smith Nicholas Conrad	officer	Sale	886	$26.87	$24K
2026-09-29	Smith Nicholas Conrad	officer	Option exercise	56,455	$2.35	$133K
2026-09-29	Smith Nicholas Conrad	officer	Option exercise	54,375	$2.35	$128K
2026-09-29	Smith Nicholas Conrad	officer	Sale	110,830	$26.58	$2.95M

Other 13D/G Filings on Alto Neuroscience, Inc.

Filed	Form	Filer	Stake	Shares
2026-07-27	SCHEDULE 13G	BlackRock, Inc.	—	—	view →

Other Filings by EcoR1 Capital, LLC

Filed	Form	Issuer	Stake	Shares
2026-06-25	SCHEDULE 13G	Fulcrum Therapeutics, Inc. FULC	—	—	view →
2026-06-25	SCHEDULE 13G	Fulcrum Therapeutics, Inc. FULC	—	—	view →
2026-06-16	SCHEDULE 13G	Eloxx Pharmaceuticals, Inc. ELOX	—	—	view →
2025-05-19	SCHEDULE	GALAPAGOS NV GLPGF	11.84%	7,803,202	view →
2025-03-17	SCHEDULE	Zymeworks Inc. ZYME	24.20%	16,858,418	view →
2025-02-18	SCHEDULE	Zymeworks Inc. ZYME	22.80%	15,720,161	view →
2025-01-13	SCHEDULE	Zymeworks Inc. ZYME	22.40%	15,411,078	view →
2025-01-03	SCHEDULE	PROTHENA CORP PUBLIC LTD CO PRTA	21.50%	11,584,280	view →
2024-10-08	SC	GALAPAGOS NV GLPGF	—	—	view →
2022-01-14	SC	PROTHENA CORP PUBLIC LTD CO PRTA	—	—	view →
2021-05-11	SC	ANAPTYSBIO, INC ANABV	—	—	view →
2021-04-13	SC	ANAPTYSBIO, INC ANABV	—	—	view →

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