SEPTInvestingStart Free

ASTC 424B5: Secondary offering

Filed with the SEC on · accession 0001437749-26-028567

ASTC filed a 424B5 (prospectus (offering)) with the SEC on Aug 19, 2026. AstroTech Corp terminated its prior at-the-market offering under the June 2026 prospectus supplement and replaced it with a new prospectus supplement for up to $50 million of common stock through H.C. The stock moved +0.1% by the first close after the filing.

Summary of the filing

AstroTech Corp terminated its prior at-the-market offering under the June 2026 prospectus supplement and replaced it with a new prospectus supplement for up to $50 million of common stock through H.C. Wainwright & Co., effective August 19, 2026.

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

Key details

Maximum offering amount under new prospectus supplement$50.0M
Gross proceeds from prior sales under June prospectus$7.9M
IssuerAstroTech Corp
Sales agentH.C. Wainwright & Co., LLC

How ASTC stock reacted

Close before

$7.93

Aug 18, 2026

First close after

+0.13%

$7.94

5 trading days

-10.47%

$7.10

Since filing

-47.04%

$4.20

✦ Ask GOAX AI about this filing — what it means for ASTC, 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 ASTC?

Click here

Frequently asked questions

What did ASTC file with the SEC on Aug 19, 2026?

ASTC filed a 424B5 (Secondary offering). AstroTech Corp terminated its prior at-the-market offering under the June 2026 prospectus supplement and replaced it with a new prospectus supplement for up to $50 million of common stock through H.C. Wainwright & Co., effective August 19, 2026.

What does a secondary offering mean for ASTC 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 ASTC stock react to this filing?

ASTC closed at $7.93 before the filing and $7.94 on Aug 19, 2026 (+0.13%). Five trading days later: $7.10 (-10.47%).

Other ASTC SEC filings

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

Try SEPT free for 7 days
ASTC overviewASTC analysisASTC newsLatest SEC filings