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DSGN 424B5: Shelf registration

Design Therapeutics

Filed with the SEC on · accession 0001193125-26-447373

DSGN filed a 424B5 (prospectus (offering)) with the SEC on Nov 4, 2026. Design Therapeutics filed a prospectus supplement increasing its at-the-market (ATM) offering capacity under its existing sales agreement with Jefferies from $100 million to $200 million. The stock moved +2.8% by the first close after the filing.

Summary of the filing

Design Therapeutics filed a prospectus supplement increasing its at-the-market (ATM) offering capacity under its existing sales agreement with Jefferies from $100 million to $200 million. The company has already sold approximately $66.3 million of common stock under the prior prospectus.

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

Key details

Maximum aggregate offering amount under updated ATM program$200.0M
Prior maximum offering amount under sales agreement prospectus$100.0M
Aggregate shares already sold under prior prospectus$66.3M
Last reported sale price per share on November 3, 2026$10
IssuerDesign Therapeutics, Inc.
Sales agentJefferies LLC

How DSGN stock reacted

Close before

$10.34

Nov 3, 2026

First close after

+2.80%

$10.63

5 trading days

—

Since filing

-1.26%

$10.21

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Frequently asked questions

What did DSGN file with the SEC on Nov 4, 2026?

DSGN filed a 424B5 (Shelf registration). Design Therapeutics filed a prospectus supplement increasing its at-the-market (ATM) offering capacity under its existing sales agreement with Jefferies from $100 million to $200 million. The company has already sold approximately $66.3 million of common stock under the prior prospectus.

What does a shelf registration mean for DSGN 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 DSGN stock react to this filing?

DSGN closed at $10.34 before the filing and $10.63 on Nov 4, 2026 (+2.80%).

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