Quantum Ownership | Who Owns Quantum?

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Quantum Ownership Summary

Quantum is owned by 8.34% institutional investors, 2.86% insiders, and 88.80% retail investors. Vanguard group is the largest institutional shareholder, holding 5.55% of QMCO shares. Neuberger Berman Intrinsic Value I is the top mutual fund, with 7.76% of its assets in Quantum shares.

QMCO Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Quantum	8.34%	2.86%	88.80%
Sector	Technology Stocks	36.93%	14.89%	48.18%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	625.54K	5.55%	$4.03M
Blackrock funding, inc. /de	217.53K	1.59%	$1.03M
Geode capital management	159.18K	1.16%	$756.47K
Blackrock	916.90K	0.96%	$375.11K
Ubs group	99.07K	0.72%	$470.57K
Vanguard fiduciary trust	80.26K	0.59%	$381.25K
State street	72.81K	0.53%	$345.87K
Sona asset management (us)	70.09K	0.51%	$332.94K
Marshall wace, llp	37.53K	0.27%	$178.26K
Quest partners	29.39K	0.26%	$189.54K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
R squared	12.24K	0.03%	$58.16K
Riverview capital advisers	10.00K	0.03%	$99.20K
Quest partners	29.39K	0.01%	$189.54K
Sona asset management (us)	70.09K	0.01%	$332.94K
Flagship harbor advisors	17.18K	0.00%	$81.63K
Kovack advisors	12.48K	0.00%	$62.77K
Bridgeway capital management	16.24K	0.00%	$77.14K
Xtx topco	11.32K	0.00%	$53.77K
Hollencrest capital management	2.00K	0.00%	$9.50K
Sbi securities	2.00K	0.00%	$9.52K

Top Buyers

Holder	Shares	% Assets	Change
Vanguard group	625.54K	0.00%	321.94K
Vanguard fiduciary trust	80.26K	0.00%	80.26K
Sona asset management (us)	70.09K	0.01%	70.09K
Bridgeway capital management	16.24K	0.00%	16.24K
Marshall wace, llp	37.53K	0.00%	15.79K

Top Sellers

Holder	Shares	% Assets	Change
Neuberger berman group	-	-	-14.31M
Long focus capital management	-	-	-9.17M
Tcw group	-	-	-2.12M
Pacific ridge capital partners	-	-	-1.26M
Herald investment management	-	-	-1.00M

New Positions

Holder	Shares	% Assets	Change	Value
Vanguard fiduciary trust	80.26K	0.00%	80.26K	$381.25K
Sona asset management (us)	70.09K	0.01%	70.09K	$332.94K
Bridgeway capital management	16.24K	0.00%	16.24K	$77.14K
Kovack advisors	12.48K	0.00%	12.48K	$62.77K
R squared	12.24K	0.03%	12.24K	$58.16K

Sold Out

Holder	Change
Cornerstone planning group	-5.00
Fmr	-15.00
Northwestern mutual wealth management	-15.00
Continuum advisory	-34.00
Motco	-37.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	18	-53.85%	1,141,970	-44.43%	8	3.70%	10	-67.74%	5	-16.67%
Dec 31, 2025	25	-10.71%	1,399,403	61.76%	12	14.01%	19	18.75%	4	-
Sep 30, 2025	26	-23.53%	864,150	-2.28%	9	2.90%	16	-27.27%	3	-57.14%
Jun 30, 2025	34	17.24%	884,330	-47.66%	18	1.52%	21	-	7	75.00%
Mar 31, 2025	29	-38.30%	1,689,433	-6.29%	34	2.55%	21	-34.38%	4	-

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Neuberger Berman Intrinsic Value I	371.91K	7.76%	-1.00
Vanguard US Total Market Shares ETF	166.09K	2.85%	-
Vanguard Total Stock Mkt Idx Inv	374.20K	2.56%	-
Neuberger Berman Small Cap Intrinsic Val	108.60K	2.27%	1.00
Strategic Advisers U.S. Total Stock	304.29K	2.08%	-33.01K
Pacific Ridge Capital Ptnrs Micro Cp Val	1.17M	1.22%	-67.04K
Vanguard Institutional Extnd Mkt Idx Tr	153.25K	1.05%	-
Herald Ord	1.00M	1.04%	-
Mango Growth ETF	88.49K	0.60%	-
Neuberger Berman US SCp Intrs Val $I Acc	35.03K	0.60%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Apr 02, 2026	Nash Laura A.	Chief Accounting Officer	Sell	$592.96
Oct 02, 2025	Meyrath Hugues	President & CEO	Sell	$32.31K
Oct 02, 2025	Nash Laura A.	Chief Accounting Officer	Sell	$6.64K
Oct 01, 2025	Nash Laura A.	Chief Accounting Officer	Sell	$1.17K
Sep 12, 2025	Nash Laura A.	Chief Accounting Officer	Sell	$2.10K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	-	1
2026 Q1	-	-
2025 Q4	-	3
2025 Q3	-	1
2025 Q2	-	5

QMCO Ownership FAQ

Who owns the most shares of Quantum?

Quantum’s largest shareholders are Vanguard group (625.54K shares, 5.55%), Blackrock funding, inc. /de (217.53K shares, 1.59%), and Geode capital management (159.18K shares, 1.16%). Together, they hold 8.30% of Quantum’s total shares outstanding.

Does Blackrock own Quantum?

Yes, BlackRock owns 0.96% of Quantum, totaling 916.9K shares as of Jun 2024. This represents 0% of BlackRock's total assets, with a market value of 375.1K$. In the last quarter, BlackRock decreased its holdings by -79.957K shares, a -8.02% change.

Who is Quantum’s biggest shareholder by percentage of total assets invested?

R squared is Quantum’s biggest shareholder by percentage of total assets invested, with 0.03% of its assets in 12.24K Quantum shares, valued at 58.16K$.

Who is the top mutual fund holder of Quantum shares?

Neuberger Berman Intrinsic Value I is the top mutual fund holder of Quantum shares, with 7.76% of its total shares outstanding invested in 371.91K Quantum shares.

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