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Quantum (QMCO) Institutional Ownership

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$7.36 +0.25 (+3.52%)
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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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Skip Chart & View Institutional Buying and Selling Data

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%
5/15/2025Activest Wealth Management4,283$62K0.0%+428,200.0%0.062%
5/14/2025AlphaQuest LLC9,653$139K0.0%N/A0.139%
5/12/2025Virtu Financial LLC19,721$284K0.0%N/A0.284%
5/5/2025Allianz Asset Management GmbH962,127$13.84M0.0%+87.8%13.844%
2/17/2025Squarepoint Ops LLC9,375$506K0.0%N/A0.163%
2/17/2025Bridgeway Capital Management LLC8,240$444K0.0%N/A0.143%
2/17/2025Bank of America Corp DE75,305$4.06M0.0%+125,408.3%1.307%
2/14/2025Itau Unibanco Holding S.A.56,000$3.02M0.1%N/A0.972%
2/14/2025Jane Street Group LLC33,612$1.81M0.0%N/A0.584%
2/14/2025Schonfeld Strategic Advisors LLC6,400$345K0.0%N/A0.111%
2/14/2025Northern Trust Corp10,407$561K0.0%-7.0%0.181%
2/14/2025Price T Rowe Associates Inc. MD5,030$272K0.0%N/A0.087%
2/13/2025Marshall Wace LLP6,188$334K0.0%N/A0.107%
2/12/2025Diametric Capital LP12,423$670K0.5%N/A0.213%
2/12/2025CIBC Private Wealth Group LLC11,000$593K0.0%N/A0.191%
2/11/2025LPL Financial LLC7,354$397K0.0%N/A0.128%
2/6/2025SBI Securities Co. Ltd.3,598$194K0.0%N/A0.062%
1/29/2025UNICOM Systems Inc.75,237$4.06M1.0%N/A1.551%
1/21/2025Flagship Harbor Advisors LLC4,194$226K0.0%N/A0.086%
1/15/2025Arkadios Wealth Advisors8,642$466K0.0%N/A0.178%
11/19/2024TCW Group Inc.106,010$371K0.0%-95.0%2.186%
11/15/2024State Street Corp17,114$60K0.0%-95.0%0.357%
10/8/2024Advance Capital Management Inc.17,310$61K0.0%-82.4%0.018%
8/16/2024Pacific Ridge Capital Partners LLC1,264,992$518K0.1%-3.9%1.320%
5/17/2024Tidal Investments LLC44,165$26K0.0%N/A0.046%
5/15/2024Price 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%
5/10/2024Acadian Asset Management LLC58,580$34K0.0%-71.4%0.062%
5/9/2024Pacific Ridge Capital Partners LLC1,316,467$783K0.2%-1.7%1.385%
4/19/2024Kovack Advisors Inc.263,901$157K0.0%+33.5%0.278%
2/14/2024Neuberger Berman Group LLC14,819,147$5.17M0.0%-3.3%15.593%
2/12/2024Pacific Ridge Capital Partners LLC1,338,647$467K0.1%-4.5%1.409%
2/9/2024Neuberger Berman Group LLC14,819,147$5.17M0.0%-3.3%15.593%
2/9/2024King Luther Capital Management Corp980,000$342K0.0%-29.2%1.031%
11/13/2023Connor 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%
11/13/2023Pacific 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%
8/7/2023Acadian Asset Management LLC401,362$433K0.0%+8.8%0.425%
7/21/2023Kovack Advisors Inc.515,477$557K0.1%+2.2%0.550%
5/17/2023Long Focus Capital Management LLC5,250,364$6.04M0.3%+2.8%4.990%
5/16/2023Solas 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%
5/12/2023Long Focus Capital Management LLC3,364,033$3.87M0.4%-34.1%3.197%
5/11/2023King Luther Capital Management Corp1,384,915$1.59M0.0%+1.5%1.316%
5/11/2023Acadian 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%
5/4/2023Herald Investment Management Ltd1,000,000$1.13M0.3%+33.9%0.950%
4/21/2023Kovack 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%
2/22/2023Kovack Advisors Inc.352,001$384K0.1%+49.2%0.335%
2/14/2023AWM Investment Company Inc.657,280$716K0.1%-20.9%0.625%
2/14/2023Marathon Capital Management60,000$65K0.0%-81.4%0.057%
2/14/2023Pacific Ridge Capital Partners LLC1,370,413$1.49M0.4%-1.9%1.303%
2/13/2023Neuberger Berman Group LLC15,287,580$16.66M0.0%-3.0%14.531%
2/10/2023Senvest Management LLC2,550,931$2.78M0.1%-54.8%2.425%
2/8/2023Russell 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%
11/15/2022Union Square Park Capital Management LLC115,275$124K0.1%-71.2%0.111%
11/15/2022Long Focus Capital Management LLC4,912,602$5.31M0.5%+19.6%4.731%
11/15/2022Marathon Capital Management323,422$349K0.1%-3.2%0.311%
11/14/2022Ergoteles LLC177,559$192K0.0%-33.9%0.171%
11/14/2022Kovack Advisors Inc.235,923$255K0.0%+8.0%0.227%
11/10/2022King Luther Capital Management Corp1,364,915$1.47M0.0%+36.5%1.314%
11/10/2022Senvest Management LLC5,646,026$6.10M0.3%+27.1%5.437%
11/10/2022Pacific 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%
11/7/2022Virtu Financial LLC25,660$28K0.0%N/A0.025%
11/4/2022Russell Investments Group Ltd.151,886$162K0.0%+138.8%0.148%
8/16/2022B. Riley Asset Management LLC772,519$1.10M0.5%+36.4%0.752%
8/15/2022Laurion Capital Management LP24,051$34K0.0%N/A0.023%
8/12/2022AWM Investment Company Inc.830,994$1.18M0.2%+128.7%0.809%
8/11/2022King Luther Capital Management Corp1,000,000$1.42M0.0%+50.4%0.974%
8/10/2022Pacific 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%
8/8/2022Walleye Capital LLC95,200$135K0.0%-76.3%0.094%
8/8/2022Y Intercept Hong Kong Ltd27,131$39K0.0%N/A0.027%
8/4/2022Herald Investment Management Ltd746,850$1.07M0.2%+42.3%0.734%
7/29/2022Russell Investments Group Ltd.63,600$89K0.0%-95.1%0.062%
7/19/2022Eidelman Virant Capital45,000$74K0.1%-55.0%0.044%
5/27/2022Walleye Capital LLC401,946$912K0.0%N/A0.669%
5/16/2022B. Riley Asset Management LLC566,431$1.29M0.6%-66.8%0.942%
5/16/2022RBF Capital LLC30,000$68K0.0%-50.0%0.050%
5/11/2022King Luther Capital Management Corp665,000$1.51M0.0%+43.3%1.106%
5/11/2022Pacific 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%
5/5/2022Russell 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%
2/15/2022Kennedy Capital Management Inc.100,586$555K0.0%-8.4%0.169%
2/15/2022King 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%
2/14/2022PDT Partners LLC18,711$103K0.0%-73.7%0.031%
2/14/2022Diametric 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 9/12/2025 by MarketBeat.com Staff
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