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Quantum (QMCO) Institutional Ownership

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$7.75 +0.72 (+10.24%)
Closing price 04:00 PM Eastern
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$7.72 -0.04 (-0.45%)
As of 07:27 PM Eastern
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Institutional Ownership Changes (13F Filings) for Quantum (NASDAQ:QMCO)

Current
Institutional Ownership
Percentage
63.66%
Number of
Institutional Buyers
(last 12 months)
23
Total
Institutional Inflows
(last 12 months)
$26.59M
Number of
Institutional Sellers
(last 12 months)
5
Total
Institutional Outflows
(last 12 months)
$8.56M
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QMCO Institutional Buying and Selling by Quarter

Quantum Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
8/14/2025 Raymond James Financial Inc.4,615$46K0.0%N/A0.066%
8/13/2025 Sassicaia Capital Advisers LLC23,267$232K0.1%N/A0.335%
8/13/2025 Marshall Wace LLP178,021$1.78M0.0%N/A2.561%
8/8/2025 Geode Capital Management LLC69,384$692K0.0%+9.1%0.998%
8/8/2025 SBI Securities Co. Ltd.5,636$56K0.0%+99.4%0.081%
7/31/2025 AlphaQuest LLC4,707$47K0.0%-51.2%0.068%
7/25/2025 Apollon Wealth Management LLC10,714$107K0.0%N/A0.154%
5/15/2025 Activest Wealth Management4,283$62K0.0%+428,200.0%0.062%
5/14/2025 AlphaQuest LLC9,653$139K0.0%N/A0.139%
5/12/2025 Virtu Financial LLC19,721$284K0.0%N/A0.284%
5/5/2025 Allianz Asset Management GmbH962,127$13.84M0.0%+87.8%13.844%
2/17/2025 Squarepoint Ops LLC9,375$506K0.0%N/A0.163%
2/17/2025 Bridgeway Capital Management LLC8,240$444K0.0%N/A0.143%
2/17/2025 Bank of America Corp DE75,305$4.06M0.0%+125,408.3%1.307%
2/14/2025 Itau Unibanco Holding S.A.56,000$3.02M0.1%N/A0.972%
2/14/2025 Jane Street Group LLC33,612$1.81M0.0%N/A0.584%
2/14/2025 Schonfeld Strategic Advisors LLC6,400$345K0.0%N/A0.111%
2/14/2025 Northern Trust Corp10,407$561K0.0%-7.0%0.181%
2/14/2025 Price T Rowe Associates Inc. MD5,030$272K0.0%N/A0.087%
2/13/2025 Marshall Wace LLP6,188$334K0.0%N/A0.107%
2/12/2025 Diametric Capital LP12,423$670K0.5%N/A0.213%
2/12/2025 CIBC Private Wealth Group LLC11,000$593K0.0%N/A0.191%
2/11/2025 LPL Financial LLC7,354$397K0.0%N/A0.128%
2/6/2025 SBI Securities Co. Ltd.3,598$194K0.0%N/A0.062%
1/29/2025 UNICOM Systems Inc.75,237$4.06M1.0%N/A1.551%
1/21/2025 Flagship Harbor Advisors LLC4,194$226K0.0%N/A0.086%
1/15/2025 Arkadios Wealth Advisors8,642$466K0.0%N/A0.178%
11/19/2024 TCW Group Inc.106,010$371K0.0%-95.0%2.186%
11/15/2024 State Street Corp17,114$60K0.0%-95.0%0.357%
10/8/2024 Advance Capital Management Inc.17,310$61K0.0%-82.4%0.018%
8/16/2024 Pacific Ridge Capital Partners LLC1,264,992$518K0.1%-3.9%1.320%
5/17/2024 Tidal Investments LLC44,165$26K0.0%N/A0.046%
5/15/2024 Price T Rowe Associates Inc. MD100,600$60K0.0%-42.6%0.106%
5/14/2024B. Riley Financial Inc.695,958$418K0.4%-65.1%0.732%
5/10/2024 Acadian Asset Management LLC58,580$34K0.0%-71.4%0.062%
5/9/2024 Pacific Ridge Capital Partners LLC1,316,467$783K0.2%-1.7%1.385%
4/19/2024 Kovack Advisors Inc.263,901$157K0.0%+33.5%0.278%
2/14/2024 Neuberger Berman Group LLC14,819,147$5.17M0.0%-3.3%15.593%
2/12/2024 Pacific Ridge Capital Partners LLC1,338,647$467K0.1%-4.5%1.409%
2/9/2024 Neuberger Berman Group LLC14,819,147$5.17M0.0%-3.3%15.593%
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2/9/2024 King Luther Capital Management Corp980,000$342K0.0%-29.2%1.031%
11/13/2023 Connor Clark & Lunn Investment Management Ltd.64,066$39K0.0%+151.5%0.067%
11/13/2023B. Riley Financial Inc.1,995,303$1.22M0.4%-18.1%2.099%
11/13/2023 Pacific Ridge Capital Partners LLC1,402,456$855K0.2%-2.5%1.476%
8/8/2023B. Riley Financial Inc.2,436,303$2.63M0.7%-19.6%2.580%
8/7/2023 Acadian Asset Management LLC401,362$433K0.0%+8.8%0.425%
7/21/2023 Kovack Advisors Inc.515,477$557K0.1%+2.2%0.550%
5/17/2023 Long Focus Capital Management LLC5,250,364$6.04M0.3%+2.8%4.990%
5/16/2023 Solas Capital Management LLC3,728,108$4.29M2.3%-26.7%3.543%
5/15/2023Roumell Asset Management LLC1,687,553$1.94M4.4%-5.2%1.604%
5/12/2023 Long Focus Capital Management LLC3,364,033$3.87M0.4%-34.1%3.197%
5/11/2023 King Luther Capital Management Corp1,384,915$1.59M0.0%+1.5%1.316%
5/11/2023 Acadian Asset Management LLC368,850$422K0.0%+35.1%0.351%
5/9/2023B. Riley Financial Inc.3,030,746$3.49M0.9%-20.8%2.881%
5/4/2023 Herald Investment Management Ltd1,000,000$1.13M0.3%+33.9%0.950%
4/21/2023 Kovack Advisors Inc.504,477$580K0.1%+43.3%0.479%
3/1/2023B. Riley Financial Inc.3,824,811$4.17M0.9%-4.5%3.635%
2/22/2023 Kovack Advisors Inc.352,001$384K0.1%+49.2%0.335%
2/14/2023 AWM Investment Company Inc.657,280$716K0.1%-20.9%0.625%
2/14/2023 Marathon Capital Management60,000$65K0.0%-81.4%0.057%
2/14/2023 Pacific Ridge Capital Partners LLC1,370,413$1.49M0.4%-1.9%1.303%
2/13/2023 Neuberger Berman Group LLC15,287,580$16.66M0.0%-3.0%14.531%
2/10/2023 Senvest Management LLC2,550,931$2.78M0.1%-54.8%2.425%
2/8/2023 Russell Investments Group Ltd.25,476$28K0.0%-83.2%0.024%
2/7/2023B. Riley Financial Inc.3,824,811$4.17M0.9%-4.5%3.635%
11/15/2022 Union Square Park Capital Management LLC115,275$124K0.1%-71.2%0.111%
11/15/2022 Long Focus Capital Management LLC4,912,602$5.31M0.5%+19.6%4.731%
11/15/2022 Marathon Capital Management323,422$349K0.1%-3.2%0.311%
11/14/2022Ergoteles LLC177,559$192K0.0%-33.9%0.171%
11/14/2022 Kovack Advisors Inc.235,923$255K0.0%+8.0%0.227%
11/10/2022 King Luther Capital Management Corp1,364,915$1.47M0.0%+36.5%1.314%
11/10/2022 Senvest Management LLC5,646,026$6.10M0.3%+27.1%5.437%
11/10/2022 Pacific Ridge Capital Partners LLC1,396,711$1.51M0.4%-2.9%1.345%
11/9/2022B. Riley Financial Inc.4,005,440$4.33M0.8%-32.4%3.857%
11/7/2022 Virtu Financial LLC25,660$28K0.0%N/A0.025%
11/4/2022 Russell Investments Group Ltd.151,886$162K0.0%+138.8%0.148%
8/16/2022 B. Riley Asset Management LLC772,519$1.10M0.5%+36.4%0.752%
8/15/2022 Laurion Capital Management LP24,051$34K0.0%N/A0.023%
8/12/2022 AWM Investment Company Inc.830,994$1.18M0.2%+128.7%0.809%
8/11/2022 King Luther Capital Management Corp1,000,000$1.42M0.0%+50.4%0.974%
8/10/2022 Pacific Ridge Capital Partners LLC1,438,739$2.04M0.5%-8.8%1.413%
8/10/2022B. Riley Financial Inc.5,921,459$8.41M1.9%+25.6%5.816%
8/8/2022 Walleye Capital LLC95,200$135K0.0%-76.3%0.094%
8/8/2022 Y Intercept Hong Kong Ltd27,131$39K0.0%N/A0.027%
8/4/2022 Herald Investment Management Ltd746,850$1.07M0.2%+42.3%0.734%
7/29/2022 Russell Investments Group Ltd.63,600$89K0.0%-95.1%0.062%
7/19/2022Eidelman Virant Capital45,000$74K0.1%-55.0%0.044%
5/27/2022 Walleye Capital LLC401,946$912K0.0%N/A0.669%
5/16/2022 B. Riley Asset Management LLC566,431$1.29M0.6%-66.8%0.942%
5/16/2022 RBF Capital LLC30,000$68K0.0%-50.0%0.050%
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5/11/2022 King Luther Capital Management Corp665,000$1.51M0.0%+43.3%1.106%
5/11/2022 Pacific Ridge Capital Partners LLC1,577,393$3.58M0.7%+25.6%2.624%
5/10/2022B. Riley Financial Inc.4,716,155$10.71M1.8%-4.1%7.845%
5/5/2022 Russell Investments Group Ltd.1,309,721$2.97M0.0%-27.5%2.179%
4/12/2022Eidelman Virant Capital100,000$227K0.1%-63.9%0.166%
2/15/2022 Kennedy Capital Management Inc.100,586$555K0.0%-8.4%0.169%
2/15/2022 King Luther Capital Management Corp464,180$2.56M0.0%+6.4%0.781%
2/15/2022Deep Field Asset Management LLC1,230,000$6.79M5.0%+5.5%2.070%
2/14/2022 PDT Partners LLC18,711$103K0.0%-73.7%0.031%
2/14/2022 Diametric Capital LP36,082$199K0.2%-17.3%0.061%
(Data available from 1/1/2016 forward)

QMCO Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of QMCO shares?

During the previous two years, 35 institutional investors and hedge funds held shares of Quantum. The most heavily invested institutionals were Allianz Asset Management GmbH ($13.84M), Neuberger Berman Group LLC ($5.17M), Bank of America Corp DE ($4.06M), UNICOM Systems Inc. ($4.06M), Itau Unibanco Holding S.A. ($3.02M), Jane Street Group LLC ($1.81M), and Marshall Wace LLP ($1.78M).Learn more on Quantum's institutional investors.

What percentage of Quantum's stock is owned by institutional investors?

63.66% of Quantum's stock is owned by institutional investors. Learn more on QMCO's institutional investor holdings.

Which institutional investors have been buying Quantum's stock?

Of the 26 institutional investors that purchased Quantum's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Allianz Asset Management GmbH ($449.71K), Marshall Wace LLP ($184.21K), Bank of America Corp DE ($75.25K), UNICOM Systems Inc. ($75.24K), Kovack Advisors Inc. ($66.19K), Itau Unibanco Holding S.A. ($56K), and Tidal Investments LLC ($44.17K).

How much institutional buying is happening at Quantum?

Institutional investors have bought a total of 1,031,137 shares in the last 24 months. This purchase volume represents approximately $26.59M in transactions.

Which of Quantum's major shareholders have been selling company stock?

The following institutional investors have sold Quantum stock in the last 24 months: TCW Group Inc. ($2.01M), State Street Corp ($325.22K), Advance Capital Management Inc. ($81.14K), AlphaQuest LLC ($4.95K), and Northern Trust Corp ($785.00).

How much institutional selling is happening at Quantum?

Institutional investors have sold a total of 2,426,248 shares in the last 24 months. This volume of shares sold represents approximately $8.56M in transactions.


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This page (NASDAQ:QMCO) was last updated on 8/22/2025 by MarketBeat.com Staff
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