NASDAQ: QMCO
Quantum Corp Stock Ownership - Who owns Quantum?

Insider buying vs selling

Have Quantum Corp insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Laura A. NashChief Accounting Officer2026-07-02260$10.51
$2.73kSell
Hugues MeyrathPresident CEO2026-07-026,232$10.51
$65.50kSell
John FichthornDirector2026-06-0411,020,645$5.19
$57.24MBuy
John FichthornDirector2026-06-043,083,975$5.19
$16.02MBuy
Dialectic Technology Spv LLC10% Owner2026-06-0411,020,645$5.19
$57.24MBuy
Dialectic Technology Spv LLC10% Owner2026-06-043,083,975$5.19
$16.02MBuy
Laura A. NashChief Accounting Officer2026-04-02109$5.44
$592.96Sell
Laura A. NashChief Accounting Officer2025-10-02611$10.86
$6.64kSell
Hugues MeyrathPresident CEO2025-10-022,975$10.86
$32.31kSell
Laura A. NashChief Accounting Officer2025-10-01118$9.91
$1.17kSell

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Net Insider Buy/Sell (L12M) Ownership

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QMCO Shareholders

What type of owners hold Quantum Corp stock?

Institutional
Insider
Retail
NameHoldSharesValueType
B Riley Financial Inc59.97%23,613,778$265.42MInsider
John Fichthorn35.95%14,153,516$159.09MInsider
Dialectic Technology Spv LLC35.82%14,104,620$158.54MInsider
Jeffrey C. Smith19.59%7,711,659$86.68MInsider
Starboard Value LP19.10%7,518,996$84.51MInsider
Eric Singer18.01%7,089,609$79.69MInsider
Gregg J. Powers2.37%931,892$10.47MInsider
Linda M. Breard2.33%916,761$10.30MInsider
J. Michael Dodson2.21%870,372$9.78MInsider
Theodore A. Stinson1.82%714,743$8.03MInsider

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QMCO vs Computer Hardware Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
QMCO1.82%98.18%Net BuyingNet Buying
DDD59.65%14.65%Net Selling
NNDM28.24%0.69%Net SellingNet Selling
OSS33.64%61.22%Net SellingNet Selling
VELO3.90%96.10%Net BuyingNet Buying

Quantum Stock Ownership FAQ

Who owns Quantum?

Quantum (NASDAQ: QMCO) is owned by 4.09% institutional shareholders, 220.19% Quantum insiders, and 0.00% retail investors. B Riley Financial Inc is the largest individual Quantum shareholder, owning 23.61M shares representing 59.97% of the company. B Riley Financial Inc's Quantum shares are currently valued at $251.25M.

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