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QMCO 424B3: Secondary offering

Quantum Corporation

Filed with the SEC on · accession 0001628280-26-049821

QMCO filed a 424B3 (prospectus (offering)) with the SEC on Jul 27, 2026. Quantum Corporation filed a prospectus for the resale of up to 13,809,707 shares of common stock by selling stockholders, including shares issued in a PIPE transaction and upon conversion of convertible notes. The stock moved -1.2% by the first close after the filing.

Summary of the filing

Quantum Corporation filed a prospectus for the resale of up to 13,809,707 shares of common stock by selling stockholders, including shares issued in a PIPE transaction and upon conversion of convertible notes. The company will not receive any proceeds from the resale.

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

Key details

Total shares registered for resale$13.8M
PIPE Shares$10.6M
Share Consideration$3.1M
Warrant Shares$110K
Closing price per share on July 24, 2026$11
IssuerQuantum Corporation
Selling stockholderDialectic Technology SPV LLC

How QMCO stock reacted

Close before

$11.10

Jul 24, 2026

First close after

-1.17%

$10.97

5 trading days

-4.14%

$10.64

Since filing

+30.36%

$14.47

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Frequently asked questions

What did QMCO file with the SEC on Jul 27, 2026?

QMCO filed a 424B3 (Secondary offering). Quantum Corporation filed a prospectus for the resale of up to 13,809,707 shares of common stock by selling stockholders, including shares issued in a PIPE transaction and upon conversion of convertible notes. The company will not receive any proceeds from the resale.

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

QMCO closed at $11.10 before the filing and $10.97 on Jul 27, 2026 (-1.17%). Five trading days later: $10.64 (-4.14%).

Other QMCO SEC filings

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