QUANTUM CORP /DE/ - Common Stock (QMCO) Institutional Ownership

13F Institutional Holders and Ownership History from Q3 2024 to Q4 2025

Type / Class
Equity / Common Stock
Symbol
QMCO on Nasdaq
Shares outstanding
23,408,763
Price per share
$6.45
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
865,123
Total reported value
$8,581,114
% of total 13F portfolios
0%
Share change
-21,857
Value change
-$227,218
Number of holders
28
Price from insider filings
$6.45
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of QUANTUM CORP /DE/ - Common Stock (QMCO) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Dialectic Technology SPV LLC 41% +11% $94,489,473 +$15,120,670 9,691,228 +19% JOHN FICHTHORN 08 Jan 2026
VANGUARD GROUP INC 5% $2,714,883 242,184 The Vanguard Group 31 Dec 2024
Blue Torch Capital LP 2.3% -68% $1,521,903 -$3,029,110 135,763 -67% Blue Torch Capital LP 13 Feb 2025

As of 30 Sep 2025, 28 institutional investors reported holding 865,123 shares of QUANTUM CORP /DE/ - Common Stock (QMCO). This represents 3.7% of the company’s total 23,408,763 outstanding shares.

Institutional Holders of QUANTUM CORP /DE/ - Common Stock (QMCO) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 26,585 $171,475 +$22,577 $6.45 1
2025 Q3 865,123 $8,581,114 -$227,218 $9.92 28
2025 Q2 884,339 $8,816,100 -$12,755,971 $9.97 34
2025 Q1 1,689,433 $24,295,053 -$24,451,428 $14.38 29
2024 Q4 1,735,848 $93,599,486 +$12,327,384 $53.92 42
2024 Q3 2,274,493 $7,960,753 +$7,810,308 $3.50 26