Quantum Corp /DE/

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Quantum Corp /DE/
CIK #0000709283
EDGAR Form CIK 2011 - 2026
10-K [0000709283]
10-Q [0000709283]
3 [0000709283]
4 [0000709283]
8-K [0000709283]
SC 13D [0000709283]
SC 13G [0000709283]
Form 13D/13G Filer Form 13D/13G Subject Filed
Dialectic Technology SPV LLC Quantum Corp /DE/ [2025-10-10]
Blue Torch Capital LP Quantum Corp /DE/ [2025-01-06]
Vanguard Group Inc Quantum Corp /DE/ [2024-02-13]
ADK SoHo Fund LP Quantum Corp /DE/ [2023-12-04]
Long Focus Capital Management LLC Quantum Corp /DE/ [2023-05-11]
Pacific Investment Management Co LLC Quantum Corp /DE/ [2022-03-28]
BlackRock Inc Quantum Corp /DE/ [2022-03-11]
BlackRock Inc Quantum Corp /DE/ [2022-02-08]
Senvest Management LLC Quantum Corp /DE/ [2021-11-18]
Neuberger Berman Group LLC Quantum Corp /DE/ [2021-04-08]
View All
Form 3/4/5 Subject 2011 - 2026
Quantum Corp /DE/
Nash Laura A
Meyrath Hugues
Dialectic Technology SPV LLC
Fichthorn John
Craythorne Anthony
White William Hillis
White Yue Zhou
Jaworksi Don
Clancy James C
Tracy John R
Blevins Tony J
Cabrera Brian E
Moorehead Lewis W
Lerner James J
Pacific Investment Management Co LLC
Gianella Kenneth P
Spanjaard Henk Jan
Arden Todd
Hurley John
Dodson J Michael
Jacoby Rebecca
Rothman Marc E
Neumeyer Christopher D
Rau Raghavendra
FBR Capital Markets & Co
Riley Bryant R
BRC Group Holdings Inc
King Elizabeth
BRC Partners Management GP LLC
B Riley Capital Management LLC
BRC Partners Opportunity Fund LP
MacPherson Regan J
Martella Donald E Jr
B Riley Securities Inc
Singer Eric
VIEX Opportunities Fund LP Series One
VIEX Capital Advisors LLC
VIEX GP LLC
VIEX Special Opportunities Fund III LP
VIEX Special Opportunities GP III LLC
VIEX Opportunities Fund LP - Series Two
BR Dialectic Capital Management LLC
Dialectic Antithesis Partners LP
Press Clifford
Sanchez Adalio T
Hall Shawn D
Ahmad Fuad
Britts William C
Stedman Geoff G
Dennis Patrick
Gacek Jon W
Pinchev Alex
Auvil Paul R III
Clark Robert S
Roberson David Earle
Mutch John
Powers Gregg J
Krall David
Dinardo Louis
Fuller Dale L
Feld Peter A
Smith Jeffrey C
Mitchell Mark R
Starboard Value & Opportunity Master Fund Ltd
Starboard Value GP LLC
Starboard Value & Opportunity C LP
Starboard Value LP
Starboard Value R LP
Starboard Principal Co GP LLC
Starboard Value & Opportunity S LLC
Starboard Principal Co LP
Starboard Value R GP LLC
Willis Christopher Shawn
Andersen Robert J
Black Philip
Lee Janae S
Breard Linda M
Soros George
Soros Fund Management LLC
Soros Robert
Crowell Christopher
Terino Edward
Brown Michael A/CA
Stinson Theodore A
Buchsbaum Thomas S
Marengi Joseph A
Fetter Elizabeth A
Belluzzo Richard
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Quantum Corp /DE/ QMCO
Common Stock
2026-03-04 Grant 25,000 $0.00
Quantum Corp /DE/ QMCO
Employee Stock Option (right to buy) · derivative
2026-01-01 Grant 50,000 $0.00
Quantum Corp /DE/ QMCO
Common Stock
2026-01-01 Grant 15,000 $0.00
Quantum Corp /DE/ QMCO
Common Stock
2026-01-01 Grant 62,500 $0.00
Quantum Corp /DE/ QMCO
Common Stock
2026-01-01 Grant 12,000 $0.00
Quantum Corp /DE/ QMCO
Common Stock
2026-01-01 Grant 12,000 $0.00
Quantum Corp /DE/ QMCO
Common Stock
2026-01-01 Grant 12,000 $0.00
Quantum Corp /DE/ QMCO
Common Stock
2026-01-01 Grant 12,000 $0.00
Quantum Corp /DE/ QMCO
Common Stock
2026-01-01 Grant 12,000 $0.00
Quantum Corp /DE/ QMCO
Common Stock
2026-01-01 Grant 12,000 $0.00
Quantum Corp /DE/ QMCO
Convertible Notes · derivative
2025-12-18 Other 0
Quantum Corp /DE/ QMCO
Convertible Notes · derivative
2025-12-18 Other
Quantum Corp /DE/ QMCO
Common Stock
2025-11-01 Grant 1,000 $0.00
Quantum Corp /DE/ QMCO
Common Stock
2025-11-01 Grant 1,000 $0.00
Quantum Corp /DE/ QMCO
Employee Stock Option (right to buy) · derivative
2025-11-01 Grant 50,000 $0.00
Quantum Corp /DE/ QMCO
Common Stock
2025-11-01 Grant 37,500 $0.00
Quantum Corp /DE/ QMCO
Common Stock
2025-10-02 Sell 611 $10.86 6,635
Quantum Corp /DE/ QMCO
Common Stock
2025-10-02 Sell 2,975 $10.86 32,308
Quantum Corp /DE/ QMCO
Common Stock
2025-10-01 Grant 500 $0.00
Quantum Corp /DE/ QMCO
Common Stock
2025-10-01 Sell 118 $9.91 1,169
showing 20 of 200 most recent transactions
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