Quantum Corporation(QMCO)

$10.02—

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Quantum Corporation(QMCO)

NASDAQ

$10.02—

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QMCO(QMCO)

QMCO

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Institutional Ownership

Top 63 Institutional Holders

Holder	Shares	Date	Change	% Held
BlackRock, Inc.	217.53K	Mar 31, 26	-3.21K	3.48%
GEODE CAPITAL MANAGEMENT, LLC	159.18K	Mar 31, 26	+2.31K	2.55%
UBS Group AG	99.07K	Mar 31, 26	-66.77K	1.59%
VANGUARD FIDUCIARY TRUST CO	80.26K	Mar 31, 26	+80.26K	1.28%
STATE STREET CORP	72.81K	Mar 31, 26	-17.90K	1.17%
SONA ASSET MANAGEMENT (US) LLC	70.09K	Mar 31, 26	+70.09K	1.12%
MARSHALL WACE, LLP	37.53K	Mar 31, 26	+15.79K	0.60%
NORTHERN TRUST CORP	28.76K	Mar 31, 26	--	0.46%
LPL Financial LLC	24.60K	Mar 31, 26	+6.23K	0.39%
PRICE T ROWE ASSOCIATES INC /MD/	21.80K	Mar 31, 26	+5.90K	0.35%
BANK OF AMERICA CORP /DE/	20.48K	Mar 31, 26	-50	0.33%
FLAGSHIP HARBOR ADVISORS, LLC	17.18K	Mar 31, 26	-9.40K	0.28%
BRIDGEWAY CAPITAL MANAGEMENT, LLC	16.24K	Mar 31, 26	+16.24K	0.26%
MORGAN STANLEY	15.18K	Mar 31, 26	+10.87K	0.24%
Kovack Advisors, Inc.	12.48K	Mar 31, 26	+12.48K	0.20%
BARCLAYS PLC	12.44K	Mar 31, 26	-1.75K	0.20%
R Squared Ltd	12.24K	Mar 31, 26	+12.24K	0.20%
XTX Topco Ltd	11.32K	Mar 31, 26	-627	0.18%
Vanguard Global Advisers, LLC	6.00K	Mar 31, 26	+6.00K	0.10%
WELLS FARGO & COMPANY/MN	4.13K	Mar 31, 26	+600	0.07%
SBI Securities Co., Ltd.	2.00K	Mar 31, 26	-421	0.03%
HOLLENCREST CAPITAL MANAGEMENT	2.00K	Mar 31, 26	+2.00K	0.03%
JONES FINANCIAL COMPANIES LLLP	1.47K	Mar 31, 26	-374	0.02%
ADVISOR GROUP HOLDINGS, INC.	965	Mar 31, 26	+217	0.02%
FEDERATED HERMES, INC.	835	Mar 31, 26	+334	0.01%
BNP PARIBAS ARBITRAGE, SNC	261	Mar 31, 26	-758	0.00%
ROYAL BANK OF CANADA	128	Mar 31, 26	-705	0.00%
NATIONAL BANK OF CANADA /FI/	100	Mar 31, 26	--	0.00%
Rialto Wealth Management, LLC	87	Mar 31, 26	+87	0.00%
Lavaca Capital LLC	39	Mar 31, 26	+39	0.00%
Federation des caisses Desjardins du Quebec	25	Mar 31, 26	--	0.00%
JPMORGAN CHASE & CO	8	Mar 31, 26	--	0.00%
Farther Finance Advisors, LLC	4	Mar 31, 26	--	0.00%
Activest Wealth Management	1	Mar 31, 26	--	0.00%
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO	--	Mar 31, 26	-15	--
FIFTH THIRD BANCORP	--	Mar 31, 26	-295	--
NBC SECURITIES, INC.	--	Mar 31, 26	-4.00K	--
CITIGROUP INC	--	Mar 31, 26	-12.83K	--
Tower Research Capital LLC (TRC)	--	Mar 31, 26	-582	--
MILLENNIUM MANAGEMENT LLC	--	Mar 31, 26	-11.24K	--
Engineers Gate Manager LP	--	Mar 31, 26	-16.41K	--
Portolan Capital Management, LLC	--	Mar 31, 26	-477.21K	--
VANGUARD GROUP INC	625.54K	Dec 31, 25	+321.94K	10.01%
Quest Partners LLC	29.39K	Dec 31, 25	-6.15K	0.47%
Global Retirement Partners, LLC	65	Dec 31, 25	+65	0.00%
BlackRock Inc.	916.90K	Jun 30, 24	-79.96K	14.67%
CAMBRIDGE TRUST CO	5.87K	Mar 31, 24	--	0.09%
Highlander Capital Management, LLC	525	Mar 31, 24	--	0.01%
PATHSTONE FAMILY OFFICE, LLC	10.25K	Sep 30, 23	--	0.16%
BDO Wealth Advisors, LLC	1.00K	Jun 30, 23	--	0.02%
HARVEST GROUP WEALTH MANAGEMENT, LLC	161	Mar 31, 23	+161	0.00%
B. Riley Securities, Inc.	3.82M	Dec 31, 22	+3.82M	61.21%
Sargent Bickham Lagudis LLC	9.84K	Dec 31, 22	--	0.16%
Eidelman Virant Capital	45.00K	Sep 30, 22	--	0.72%
Highland Private Wealth Management	25.72K	Sep 30, 22	--	0.41%
PARAMETRIC PORTFOLIO ASSOCIATES LLC	121.42K	Mar 31, 22	+93.96K	1.94%
Amalgamated Financial Corp.	7.07K	Mar 31, 22	+7.07K	0.11%
FIRST MIDWEST BANK TRUST DIVISION	58.55K	Dec 31, 21	--	0.94%
SPHINX TRADING, LP	21.50K	Dec 31, 21	-2.53K	0.34%
Adirondack Research & Management Inc.	90.62K	Sep 30, 21	--	1.45%
Berman Capital Advisors, LLC	41	Sep 30, 21	--	0.00%
PEAK6 Group LLC	5.70K	Jun 30, 18	+5.70K	0.09%
Breithorn Capital Management	368.17K	Jun 30, 17	+368.17K	5.89%

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Holder

Date

Change

% Held

BlackRock, Inc.

217.53K

Mar 31, 26

-3.21K

3.48%

GEODE CAPITAL MANAGEMENT, LLC

159.18K

Mar 31, 26

+2.31K

2.55%

UBS Group AG

99.07K

Mar 31, 26

-66.77K

1.59%

VANGUARD FIDUCIARY TRUST CO

80.26K

Mar 31, 26

+80.26K

1.28%

STATE STREET CORP

72.81K

Mar 31, 26

-17.90K

1.17%

SONA ASSET MANAGEMENT (US) LLC

70.09K

Mar 31, 26

+70.09K

1.12%

MARSHALL WACE, LLP

37.53K

Mar 31, 26

+15.79K

0.60%

NORTHERN TRUST CORP

28.76K

Mar 31, 26

0.46%

LPL Financial LLC

24.60K

Mar 31, 26

+6.23K

0.39%

PRICE T ROWE ASSOCIATES INC /MD/

21.80K

Mar 31, 26

+5.90K

0.35%

BANK OF AMERICA CORP /DE/

20.48K

Mar 31, 26

-50

0.33%

FLAGSHIP HARBOR ADVISORS, LLC

17.18K

Mar 31, 26

-9.40K

0.28%

BRIDGEWAY CAPITAL MANAGEMENT, LLC

16.24K

Mar 31, 26

+16.24K

0.26%

MORGAN STANLEY

15.18K

Mar 31, 26

+10.87K

0.24%

Kovack Advisors, Inc.

12.48K

Mar 31, 26

+12.48K

0.20%

BARCLAYS PLC

12.44K

Mar 31, 26

-1.75K

0.20%

R Squared Ltd

12.24K

Mar 31, 26

+12.24K

0.20%

XTX Topco Ltd

11.32K

Mar 31, 26

-627

0.18%

Vanguard Global Advisers, LLC

6.00K

Mar 31, 26

+6.00K

0.10%

WELLS FARGO & COMPANY/MN

4.13K

Mar 31, 26

+600

0.07%

SBI Securities Co., Ltd.

2.00K

Mar 31, 26

-421

0.03%

HOLLENCREST CAPITAL MANAGEMENT

2.00K

Mar 31, 26

+2.00K

0.03%

JONES FINANCIAL COMPANIES LLLP

1.47K

Mar 31, 26

-374

0.02%

ADVISOR GROUP HOLDINGS, INC.

965

Mar 31, 26

+217

0.02%

FEDERATED HERMES, INC.

835

Mar 31, 26

+334

0.01%

BNP PARIBAS ARBITRAGE, SNC

261

Mar 31, 26

-758

0.00%

ROYAL BANK OF CANADA

128

Mar 31, 26

-705

0.00%

NATIONAL BANK OF CANADA /FI/

100

Mar 31, 26

0.00%

Rialto Wealth Management, LLC

Mar 31, 26

+87

0.00%

Lavaca Capital LLC

Mar 31, 26

+39

0.00%

Federation des caisses Desjardins du Quebec

Mar 31, 26

0.00%

JPMORGAN CHASE & CO

Mar 31, 26

0.00%

Farther Finance Advisors, LLC

Mar 31, 26

0.00%

Activest Wealth Management

Mar 31, 26

0.00%

NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO

Mar 31, 26

-15

FIFTH THIRD BANCORP

Mar 31, 26

-295

NBC SECURITIES, INC.

Mar 31, 26

-4.00K

CITIGROUP INC

Mar 31, 26

-12.83K

Tower Research Capital LLC (TRC)

Mar 31, 26

-582

MILLENNIUM MANAGEMENT LLC

Mar 31, 26

-11.24K

Engineers Gate Manager LP

Mar 31, 26

-16.41K

Portolan Capital Management, LLC

Mar 31, 26

-477.21K

VANGUARD GROUP INC

625.54K

Dec 31, 25

+321.94K

10.01%

Quest Partners LLC

29.39K

Dec 31, 25

-6.15K

0.47%

Global Retirement Partners, LLC

Dec 31, 25

+65

0.00%

BlackRock Inc.

916.90K

Jun 30, 24

-79.96K

14.67%

CAMBRIDGE TRUST CO

5.87K

Mar 31, 24

0.09%

Highlander Capital Management, LLC

525

Mar 31, 24

0.01%

PATHSTONE FAMILY OFFICE, LLC

10.25K

Sep 30, 23

0.16%

BDO Wealth Advisors, LLC

1.00K

Jun 30, 23

0.02%

HARVEST GROUP WEALTH MANAGEMENT, LLC

161

Mar 31, 23

+161

0.00%

B. Riley Securities, Inc.

3.82M

Dec 31, 22

+3.82M

61.21%

Sargent Bickham Lagudis LLC

9.84K

Dec 31, 22

0.16%

Eidelman Virant Capital

45.00K

Sep 30, 22

0.72%

Highland Private Wealth Management

25.72K

Sep 30, 22

0.41%

PARAMETRIC PORTFOLIO ASSOCIATES LLC

121.42K

Mar 31, 22

+93.96K

1.94%

Amalgamated Financial Corp.

7.07K

Mar 31, 22

+7.07K

0.11%

FIRST MIDWEST BANK TRUST DIVISION

58.55K

Dec 31, 21

0.94%

SPHINX TRADING, LP

21.50K

Dec 31, 21

-2.53K

0.34%

Adirondack Research & Management Inc.

90.62K

Sep 30, 21

1.45%

Berman Capital Advisors, LLC

Sep 30, 21

0.00%

PEAK6 Group LLC

5.70K

Jun 30, 18

+5.70K

0.09%

Breithorn Capital Management

368.17K

Jun 30, 17

+368.17K

5.89%