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Disclosery

QMCO QUANTUM CORP

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COM (common), issuer CIK 709283

29 managers (29 13F filers) reported a position in QMCO shares at 2025-09-30, 865,123 shares in all. 3 filers opened a position and 9 filers sold out during the quarter.

Managers
29
13F filers
29
New
3
Added
13
Reduced
4
Sold out
9
Shares held by filers
865,123

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
VANGUARD GROUP INCin group VANGUARD GROUP INC303,597$3.01M<0.01%+46,91913F-HRTimelineGroup
UBS Group AGin group UBS Group AG162,605$1.61M<0.01%+102,38413F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.162,338$1.61M<0.01%+21,02713F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC79,427$788K<0.01%+10,04313F-HRTimelineGroup
AlphaQuest LLC35,536$353K0.02%+30,82913F-HRTimeline
STATE STREET CORPin group STATE STREET CORP27,347$271K<0.01%013F-HRTimelineGroup
FLAGSHIP HARBOR ADVISORS, LLC22,710$225K0.01%new13F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA22,715$225K<0.01%+3,36213F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP11,687$116K<0.01%013F-HRTimelineGroup
Riverview Capital Advisers, LLC10,000$99.2K0.03%new13F-HRTimeline
HOLLENCREST CAPITAL MANAGEMENT6,560$65.1K<0.01%+4,56013F-HRTimeline
SBI Securities Co., Ltd.5,970$59.2K<0.01%+33413F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS3,461$34.3K<0.01%+2,64113F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY3,356$33.3K<0.01%-42,37713F-HR/ATimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/2,896$28.7K<0.01%+2,23413F-HR/ATimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.990$9.76K<0.01%+95513F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP895$8.48K<0.01%+40113F-HRTimelineGroup
NewEdge Advisors, LLC700$6.94K<0.01%013F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC455$4.51K<0.01%013F-HR/ATimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…427$4.24K<0.01%-29513F-HRTimelineGroup
Farther Finance Advisors, LLC304$3.02K<0.01%+30013F-HRTimeline
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…295$2.93K<0.01%013F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN240$2.38K<0.01%-5,07513F-HRTimelineGroup
WHITTIER TRUST CO187$2.2K<0.01%013F-HRTimeline
FNY Investment Advisers, LLC273$2K<0.01%-39413F-HRTimeline
Physician Wealth Advisors, Inc.102$1.01K<0.01%new13F-HRTimeline
Rialto Wealth Management, LLC42$417<0.01%013F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO8$79<0.01%013F-HR/ATimelineGroup
Activest Wealth Management0$4<0.01%013F-HRTimelineAmount filed as zero, left out of ratios.