QUANTUM CORP /DE/

SEC insider activity covers quarterly filings through June 30, 2026. Later filings are not included. Reported roles do not establish current employment or current holdings. SEC filing documents, sections and filing-text search cover filings dated January 1, 2000 onward. Earlier filings are deferred until after launch.

QMCO

organization

SIC: 3572

SEC Insider

$519.5M

1,197 transactions

Summary

QUANTUM CORP /DE/ (QMCO) is an organization.

Recent Insider Transactions

As filed, including amendments; not net cash flow or current holdings. Joint reports count once. Totals cover known values only.

Buys: $83.2MSales: $142.2M100 insiders

Date	Insider	Type	Value
2026-06-01	Dialectic Technology SPV LLC	J	$57.2M
2026-06-04	Dialectic Technology SPV LLC	C	$57.2M
2026-06-04	FICHTHORN JOHN	C	$57.2M
2026-06-04	Dialectic Technology SPV LLC	A	$16.0M
2026-06-04	FICHTHORN JOHN	A	$16.0M
2026-04-02	Nash Laura A.(Chief Accounting Officer)	Sell	$592.96
2026-06-04	Dialectic Technology SPV LLC	C	—
2026-06-04	FICHTHORN JOHN	C	—
2026-06-01	FICHTHORN JOHN	J	—
2026-04-01	Meyrath Hugues(President & CEO)	A	$0
2026-04-01	Craythorne Anthony(Chief Revenue Officer)	A	$0
2026-04-01	Nash Laura A.(Chief Accounting Officer)	A	$0
2026-03-04	White William Hillis(Chief Financial Officer)	A	$0
2026-01-01	Tracy John R.	A	$0
2026-01-01	FICHTHORN JOHN	A	$0
2026-01-01	Jaworksi Don	A	$0
2026-01-01	Blevins Tony J	A	$0
2026-01-01	Clancy James C	A	$0
2026-01-01	White Yue Zhou	A	$0
2026-01-01	Meyrath Hugues(President & CEO)	A	$0

SEC filings: SEC EDGAR

Activity data: SEC EDGAR

QUANTUM CORP /DE/ — Contributions, Lobbying & Contracts | Poliscope