SEPTInvestingStart Free

ANRO 424B5: Secondary offering

Alto Neuroscience, Inc.

Filed with the SEC on · accession 0001104659-26-083268

ANRO filed a 424B5 (prospectus (offering)) with the SEC on Jul 14, 2026. The final terms of an offering of shares or bonds. The stock moved -0.8% by the first close after the filing.

Summary of the filing

Alto Neuroscience, Inc. filed a prospectus supplement for a follow-on public offering of 3,776,436 shares of common stock at $26.48 per share, with total proceeds of approximately $100 million before underwriting discounts and expenses.

For details, click here →How to read a 424B5 →

Key details

Shares offeredshares 3.8M
Offering price per share$26
Total offering value$100.0M
Underwriting discounts and commissions$5.5M
Net proceeds to issuer before expenses$94.5M
IssuerAlto Neuroscience, Inc.
Joint book-running managerBofA Securities
Joint book-running managerStifel
Joint book-running managerWilliam Blair
Joint book-running managerBaird
Co-managerJones
Co-managerH.C. Wainwright & Co.

How ANRO stock reacted

Close before

$28.03

Jul 13, 2026

First close after

-0.82%

$27.80

5 trading days

-7.60%

$25.90

Since filing

-10.24%

$25.16

✦ Ask GOAX AI about this filing — what it means for ANRO, what changed since its last filings and what to watch next.

Try it free for 7 days

🔔 Want to stay updated on new SEC filings for ANRO?

Click here

Frequently asked questions

What did ANRO file with the SEC on Jul 14, 2026?

ANRO filed a 424B5 (Secondary offering). Alto Neuroscience, Inc. filed a prospectus supplement for a follow-on public offering of 3,776,436 shares of common stock at $26.48 per share, with total proceeds of approximately $100 million before underwriting discounts and expenses.

What does a secondary offering mean for ANRO stock?

New shares dilute existing holders and are often sold at a discount to the market price.

How do I read a 424B5?

The final terms of an offering of shares or bonds. Look at price, number of shares and the discount to the market price. Large offerings dilute existing shareholders.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A 424B5 (prospectus (offering)): The final terms of an offering of shares or bonds.

How did ANRO stock react to this filing?

ANRO closed at $28.03 before the filing and $27.80 on Jul 14, 2026 (-0.82%). Five trading days later: $25.90 (-7.60%).

Other ANRO SEC filings

Get alerts when ANRO files with the SEC, plus live charts, key levels and news for 13,000+ stocks.

Try SEPT free for 7 days
ANRO overviewANRO analysisANRO newsLatest SEC filings