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FLY 424B3: Secondary offering

Firefly Aerospace Inc.

Filed with the SEC on · accession 0001860160-26-000024

FLY filed a 424B3 (prospectus (offering)) with the SEC on Aug 11, 2026. The final terms of an offering of shares or bonds. The stock moved +2.3% by the first close after the filing.

Summary of the filing

Firefly Aerospace Inc. filed a prospectus supplement to register up to 11,111,116 shares of common stock for resale by selling securityholders, who received the shares as consideration in the acquisition of SciTec Innovations, LLC.

For details, click here →How to read a 424B3 →

Key details

Shares of common stock registered for resaleshares 11.1M
Closing price per share on August 10, 2026$26
IssuerFirefly Aerospace Inc.
Acquired companySciTec Innovations, LLC

How FLY stock reacted

Close before

$25.76

Aug 10, 2026

First close after

+2.33%

$26.36

5 trading days

+5.51%

$27.18

Since filing

-19.41%

$20.76

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Frequently asked questions

What did FLY file with the SEC on Aug 11, 2026?

FLY filed a 424B3 (Secondary offering). Firefly Aerospace Inc. filed a prospectus supplement to register up to 11,111,116 shares of common stock for resale by selling securityholders, who received the shares as consideration in the acquisition of SciTec Innovations, LLC.

What does a secondary offering mean for FLY stock?

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

How do I read a 424B3?

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 424B3 (prospectus (offering)): The final terms of an offering of shares or bonds.

How did FLY stock react to this filing?

FLY closed at $25.76 before the filing and $26.36 on Aug 11, 2026 (+2.33%). Five trading days later: $27.18 (+5.51%).

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