Quantum QMCO Insider Ownership

NASDAQ QMCO
$18.31 -0.17 (-0.92%)
At close: Oct 19, 2026 · 4:00 PM EDT

Insider Holdings by Owner

15.00Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
37.20%
▼-0.020% pp QoQ
Shares Held by Insiders
14.65Mn
filed for Sep 2026
▼-0.05% QoQ
Shares Outstanding
39.38Mn
39,375,000 shares
Direct Holdings
542.33K
Indirect: 14.10Mn
Net Shares Traded (QoQ)
-7.97K
net selling in Sep 2026
Insiders Holding Shares
22
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —

Insider Ownership Summary

Across the past 12 months, open-market trades by Quantum insiders were all sales, totaling $84,680 (8.08K shares).

Form 4 Holdings

Insiders Holding QMCO

Insiders 22
Shares held 15.00Mn
Of outstanding 38.10%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Technology Spv Llc Dialectic TenPercentOwner 14,104,620 0 14,104,620 94.0% 08 Jun, 2026
2 James C Clancy Chief Operating Officer 163,000 0 163,000 1.1% 05 Oct, 2026
3 Hugues Meyrath President Ceo 118,468 0 118,468 0.8% 07 Jul, 2026
4 James J Lerner President Ceo 110,848 0 110,848 0.7% 23 Apr, 2025
5 Yue Zhou White Director 53,139 0 53,139 0.4% 05 Oct, 2026
6 Don Jaworksi Director 51,675 0 51,675 0.3% 05 Oct, 2026
7 Hiral Patel Chief Accounting Officer 50,000 0 50,000 0.3% 05 Oct, 2026
8 J Michael Dodson Senior Vice President, Cfo 43,519 0 43,519 0.3% 06 Oct, 2022
9 John Fichthorn Director, TenPercentOwner 40,896 0 40,896 0.3% 05 Oct, 2026
10 John R. Tracy Director 39,000 0 39,000 0.3% 05 Oct, 2026
11 Kenneth P. Gianella Chief Financial Officer 32,402 0 32,402 0.2% 05 Feb, 2025
12 Brian E Cabrera Svp Chief Admin Ofcr Secy 28,736 0 28,736 0.2% 23 Apr, 2025
13 William Hillis White Chief Financial Officer 25,000 0 25,000 0.2% 04 Mar, 2026
14 Tony J Blevins Director 25,000 0 25,000 0.2% 05 Oct, 2026
15 Lewis W. Moorehead Chief Accounting Officer 24,971 0 24,971 0.2% 23 Apr, 2025
16 John Hurley Chief Revenue Officer 17,076 0 17,076 0.1% 06 Sep, 2023
17 Henk Jan Spanjaard Chief Revenue Officer 14,903 0 14,903 0.1% 17 Jan, 2025
18 Marc E Rothman Director 14,881 0 14,881 0.1% 06 Sep, 2022
19 Anthony Craythorne Chief Revenue Officer 13,522 0 13,522 0.1% 05 Aug, 2026
20 Raghavendra Rau Executive Chairman 12,894 0 12,894 0.1% 26 Apr, 2022
21 Laura A. Nash Chief Accounting Officer 10,770 0 10,770 0.1% 07 Jul, 2026
22 Rebecca Jacoby Director 7,931 0 7,931 0.1% 06 Sep, 2022

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

1,122 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
01 Oct, 2026 John Fichthorn Director, TenPercentOwner Acquired A 12,000 $0.00 $0 40,896 Direct
01 Oct, 2026 Hugues Meyrath President Ceo Acquired A 500,000 $0.00 $0 500,000 Direct
01 Oct, 2026 Tony J Blevins Director Acquired A 12,000 $0.00 $0 25,000 Direct
01 Oct, 2026 Anthony Craythorne Chief Revenue Officer Acquired A 200,000 $0.00 $0 200,000 Direct
01 Oct, 2026 John R. Tracy Director Acquired A 12,000 $0.00 $0 39,000 Direct
01 Oct, 2026 Yue Zhou White Director Acquired A 12,000 $0.00 $0 53,139 Direct
01 Oct, 2026 Don Jaworksi Director Acquired A 12,000 $0.00 $0 51,675 Direct
01 Oct, 2026 Hiral Patel Chief Accounting Officer Acquired A 50,000 $0.00 $0 50,000 Direct
01 Oct, 2026 James C Clancy Chief Operating Officer Acquired A 150,000 $0.00 $0 163,000 Direct
01 Oct, 2026 James C Clancy Chief Operating Officer Acquired A 400,000 $0.00 $0 400,000 Direct
03 Aug, 2026 Anthony Craythorne Chief Revenue Officer Disposed S 1,478 $10.73 $15.86K 13,522 Direct
02 Jul, 2026 Laura A. Nash Chief Accounting Officer Disposed S 260 $10.51 $2.73K 10,770 Direct
02 Jul, 2026 Hugues Meyrath President Ceo Disposed S 6,232 $10.51 $65.50K 118,468 Direct
04 Jun, 2026 John Fichthorn Director, TenPercentOwner Acquired C 11,020,645 $5.19 $57.24Mn 11,020,645 Indirect
04 Jun, 2026 Technology Spv Llc Dialectic TenPercentOwner Acquired C 11,020,645 $5.19 $57.24Mn 11,020,645 Direct
04 Jun, 2026 John Fichthorn Director, TenPercentOwner Acquired A 3,083,975 $5.19 $16.02Mn 14,104,620 Indirect
04 Jun, 2026 Technology Spv Llc Dialectic TenPercentOwner Acquired A 3,083,975 $5.19 $16.02Mn 14,104,620 Direct
01 Jun, 2026 Technology Spv Llc Dialectic TenPercentOwner Acquired J 105,911 — — 105,911 Direct
01 Jun, 2026 John Fichthorn Director, TenPercentOwner Acquired J 105,911 — — 105,911 Indirect
04 Jun, 2026 John Fichthorn Director, TenPercentOwner Disposed C 57,241,228 — — 0 Indirect