Alto Neuroscience Inc. (ANRO)

NYSE: ANRO · Pharmaceutical Preparations · Mountain View, CA · filing with the SEC since 2023

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Grade5.2

◀ Past 4.6● Present 4.5▶ Future 6.3

7 est.

Overview Business Financials Grade Forecast Sentiment Ownership People Filings Patents Chart

Who owns Alto Neuroscience Inc.

As filed with the SEC

Holders of 5% or more

Perceptive Advisors LLC holds 9.99% of Common Stock, $0.0001 par value per share, as its SCHEDULE 13G/A filed Aug 14, 2026 says.

Directors and officers

report now, of 13 people on the record since 2024. Their holdings as a group are not read here.

Institutions as a whole

n/a

The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 5 named at left.

Holders of 5% or moreshare of the class, as filed

Perceptive Advisors LLC

SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock, $0.0001 par value per share · 9.99% in Feb 17, 2026

9.99%

Commodore Capital LP

SCHEDULE 13G/A · filed May 15, 2026 · Common Stock, $0.0001 par value per share · 9.9% in Feb 17, 2026

9.9%

Sirenia Capital Management LP

SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock, par value $0.0001 per share · 7.9% in May 15, 2026

6.2%

Blackrock, Inc.

SCHEDULE 13G · filed Jul 27, 2026 · Common Stock · 2.1% in Jul 16, 2025

EcoR1 Capital, LLC

SCHEDULE 13G · filed Jul 20, 2026 · Comon Stock

5.8%

Armistice Capital, LLC

SCHEDULE 13G/A · filed Feb 18, 2026 · Common Stock, $0.0001 par value per share · reported falling below 5%, from 6% in Feb 17, 2026

under 5%

Fmr LLC

SCHEDULE 13G/A · filed Feb 12, 2025 · COMMON STOCK · reported falling below 5%

under 5%

Steven A. Cohen

SCHEDULE 13G/A · filed May 15, 2026 · Common Stock, par value $0.0001 per share · reported falling below 5%, from 8.9% in Feb 17, 2026

under 5%

K2 HealthVentures Equity Trust LLC

SCHEDULE 13G/A · filed Feb 17, 2026 · Common Stock, $0.0001 par value per share · reported falling below 5%, from 5.6% in May 15, 2025

under 5%

Vestal Point Capital, LP

SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock, par value $0.0001 per share · reported falling below 5%, from 6.5% in May 15, 2026

under 5%

RA Capital Management, L.P.

SCHEDULE 13G/A · filed Feb 14, 2025 · Common Stock, par value $0.0001 per share · reported falling below 5%

under 5%

What ANRO reports owning in othersstakes of 5% or more, and other ties

1 subsidiary in 1 country, from the list filed with the 10-K filed Mar 16, 2026.

Insider tradesForm 4

3sales

0purchases

0sales on a scheduled plan

1people selling

$3.6Msold, in dollars

$0bought, in dollars

Open-market trades on Form 4 from Oct 5, 2025 to Oct 5, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.

By calendar yearSoldBought

2426

2026 runs to Oct 5, 2026. Dollars as filed, summed by the transaction date.

People who traded in the window1 of 20 on the roster

Person	Role as filed	Sales	Sold	On a plan	Buys	Bought
Smith Nicholas Conrad	PRESIDENT AND CFO	3	$3.6M	0	0	$0

SI Assistanton ANRO · research, not advice