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MX 424B5: Secondary offering

Magnachip Semiconductor Corporation

Filed with the SEC on · accession 0001193125-26-274353

MX filed a 424B5 (prospectus (offering)) with the SEC on Jun 17, 2026. Magnachip Semiconductor Corporation filed a prospectus supplement for an at-the-market offering of up to $50,000,000 of its common stock through B. The stock moved -4.0% by the first close after the filing.

Summary of the filing

Magnachip Semiconductor Corporation filed a prospectus supplement for an at-the-market offering of up to $50,000,000 of its common stock through B. Riley Securities as sales agent.

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

Key details

Maximum aggregate offering price of common stock$50.0M
Last reported sale price per share on June 16, 2026$6
Commission rate$3
IssuerMagnachip Semiconductor Corporation
Sales agentB. Riley Securities, Inc.

How MX stock reacted

Close before

$5.50

Jun 16, 2026

First close after

-4.00%

$5.28

5 trading days

-11.64%

$4.86

Since filing

-62.73%

$2.05

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Frequently asked questions

What did MX file with the SEC on Jun 17, 2026?

MX filed a 424B5 (Secondary offering). Magnachip Semiconductor Corporation filed a prospectus supplement for an at-the-market offering of up to $50,000,000 of its common stock through B. Riley Securities as sales agent.

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

MX closed at $5.50 before the filing and $5.28 on Jun 17, 2026 (-4.00%). Five trading days later: $4.86 (-11.64%).

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