QUANTUM CORP /DE/ (QMCO)

Latest Insider Confidence Score

2026Q1

50.0
Bearish

Company insider confidence (by quarter)

2012Q2 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Soros Fund Management Llc — 11,540,015 Jan 30, 2015
Soros George — 11,540,015 Jan 30, 2015
Soros Robert — 11,540,015 Jan 30, 2015
B. Riley Financial, Inc. 10% Owner 3,627,662 Jan 23, 2019
B. Riley Capital Management, Llc 10% Owner 3,627,662 Jan 23, 2019

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Mar 4, 2026 Mar 4, 2026 White William Hillis CFO Neutral 90.0 +25,000 100.00% ✗ -
Feb 9, 2026 White William Hillis CFO Neutral 52.5 - 0.00% ✗ -
Jan 1, 2026 Jan 5, 2026 Craythorne Anthony Chief Revenue Officer Neutral 90.0 +15,000 100.00% ✗ -
Jan 1, 2026 Jan 5, 2026 Meyrath Hugues CEO Neutral 90.0 +62,500 100.48% ✗ -
Jan 1, 2026 Jan 5, 2026 White Yue Zhou Director Neutral 90.0 +12,000 41.18% ✗ -
Jan 1, 2026 Jan 5, 2026 Clancy James C Director Neutral 90.0 +12,000 1200.00% ✗ -
Jan 1, 2026 Jan 5, 2026 Blevins Tony J Director Neutral 90.0 +12,000 1200.00% ✗ -
Jan 1, 2026 Jan 5, 2026 Jaworksi Don Director Neutral 90.0 +12,000 43.36% ✗ -
Jan 1, 2026 Jan 5, 2026 FICHTHORN JOHN Director Neutral 90.0 +12,000 78.58% ✗ -
Jan 1, 2026 Jan 5, 2026 Tracy John R. Director Neutral 90.0 +12,000 80.00% ✗ -
Sep 23, 2025 Dec 29, 2025 FICHTHORN JOHN Director Neutral 52.5 - 0.00% ✗ -
Dec 18, 2025 Dec 23, 2025 Dialectic Technology SPV LLC 10% Owner Neutral 52.5 - 0.00% ✗ -
Dec 23, 2025 Dialectic Technology SPV LLC 10% Owner Neutral 52.5 - 0.00% ✗ -
Nov 1, 2025 Nov 4, 2025 Blevins Tony J Director Neutral 90.0 +1,000 100.00% ✗ -
Nov 1, 2025 Nov 4, 2025 Clancy James C Director Neutral 90.0 +1,000 100.00% ✗ -
Nov 1, 2025 Nov 4, 2025 Meyrath Hugues CEO Neutral 90.0 +37,500 151.82% ✗ -
Oct 2, 2025 Oct 3, 2025 Meyrath Hugues CEO Sell 46.3 -2,975 -10.75% ✗ $32.3K
Oct 1, 2025 Oct 3, 2025 Nash Laura A. Chief Accounting Officer Sell 47.5 -229 -2.01% ✗ $7.8K
Sep 17, 2025 Blevins Tony J Director Neutral 52.5 - 0.00% ✗ -
Sep 17, 2025 Clancy James C Director Neutral 52.5 - 0.00% ✗ -
Sep 12, 2025 Sep 17, 2025 Nash Laura A. Chief Accounting Officer Sell 47.5 -284 -2.44% ✗ $2.1K
Jul 14, 2025 Craythorne Anthony Chief Revenue Officer Neutral 52.5 - 0.00% ✗ -
May 1, 2025 May 5, 2025 FICHTHORN JOHN Director Neutral 90.0 +4,405 40.54% ✗ -
Apr 30, 2025 FICHTHORN JOHN Director Neutral 52.5 - 0.00% ✗ -
Apr 21, 2025 Apr 23, 2025 Moorehead Lewis W. Chief Accounting Officer Sell 67.5 +154 0.62% ✗ $1.7K
Apr 21, 2025 Apr 23, 2025 Lerner James J CEO Sell 83.8 +3,044 2.82% ✗ $26.9K
Apr 21, 2025 Apr 23, 2025 Cabrera Brian E SVP Chief Admin Ofcr & Secy Sell 83.8 +796 2.85% ✗ $10.4K
Apr 15, 2025 Apr 17, 2025 PACIFIC INVESTMENT MANAGEMENT CO LLC 10% Owner Sell 16.3 -962,127 -100.00% ✗ $9.9M
Apr 14, 2025 Moorehead Lewis W. Chief Accounting Officer Neutral 52.5 - 0.00% ✗ -
Apr 2, 2025 Apr 4, 2025 Nash Laura A. Chief Accounting Officer Sell 47.5 -136 -1.15% ✗ $1.7K
Feb 3, 2025 Feb 5, 2025 Gianella Kenneth P. CFO Sell 46.3 -1,279 -3.80% ✗ $27.5K
Jan 16, 2025 Jan 17, 2025 Lerner James J CEO Sell 42.5 -2,511 -2.28% ✗ $89.6K
Jan 16, 2025 Jan 17, 2025 Spanjaard Henk Jan Chief Revenue Officer Sell 46.3 -935 -5.90% ✗ $33.4K
Jan 16, 2025 Jan 17, 2025 Gianella Kenneth P. CFO Sell 42.5 -1,487 -4.23% ✗ $53.1K
Nov 8, 2024 Jan 17, 2025 Cabrera Brian E SVP Chief Admin Ofcr & Secy Sell 42.5 -2,287 -7.57% ✗ $72.5K
Nov 8, 2024 Jan 17, 2025 Nash Laura A. Chief Accounting Officer Sell 47.5 -328 -2.71% ✗ $1.5K
Nov 8, 2024 Jan 17, 2025 Lerner James J CEO Sell 46.3 -3,681 -3.23% ✗ $16.3K
Nov 8, 2024 Jan 17, 2025 Spanjaard Henk Jan Chief Revenue Officer Sell 47.5 -218 -1.36% ✗ $965.7
Nov 8, 2024 Jan 17, 2025 Gianella Kenneth P. CFO Sell 47.5 -1,332 -3.65% ✗ $5.9K
Nov 8, 2024 Jan 17, 2025 Cabrera Brian E SVP Chief Admin Ofcr & Secy Sell 47.5 -2,118 -6.55% ✗ $9.4K
Jan 3, 2025 Jan 7, 2025 PACIFIC INVESTMENT MANAGEMENT CO LLC 10% Owner Sell 15.0 -228,195 -4.98% ✗ $14M
Nov 8, 2024 Dec 5, 2024 Gianella Kenneth P. CFO Sell 46.3 -2,590 -7.10% ✗ $11.5K
Nov 8, 2024 Dec 5, 2024 Spanjaard Henk Jan Chief Revenue Officer Sell 47.5 -394 -2.45% ✗ $1.7K
Nov 8, 2024 Dec 5, 2024 Lerner James J CEO Sell 46.3 -6,505 -5.71% ✗ $28.8K
Nov 8, 2024 Dec 5, 2024 Nash Laura A. Chief Accounting Officer Sell 47.5 -685 -5.65% ✗ $3K
Nov 8, 2024 Dec 5, 2024 Cabrera Brian E SVP Chief Admin Ofcr & Secy Sell 46.3 -5,387 -16.65% ✗ $23.9K
Nov 19, 2024 White Yue Zhou Director Neutral 52.5 - 0.00% ✗ -
Nov 19, 2024 Meyrath Hugues Director Neutral 52.5 - 0.00% ✗ -
Nov 19, 2024 Gianella Kenneth P. CFO Neutral 52.5 - 0.00% ✗ -
Nov 19, 2024 Cabrera Brian E SVP Chief Admin Ofcr & Secy Neutral 52.5 - 0.00% ✗ -
Nov 19, 2024 Lerner James J CEO Neutral 52.5 - 0.00% ✗ -
Nov 19, 2024 Spanjaard Henk Jan Chief Revenue Officer Neutral 52.5 - 0.00% ✗ -
Nov 19, 2024 Jaworksi Don Director Neutral 52.5 - 0.00% ✗ -
Nov 19, 2024 Nash Laura A. Chief Accounting Officer Neutral 52.5 - 0.00% ✗ -
Nov 1, 2024 Nov 5, 2024 Tracy John R. Director Neutral 90.0 +3,000 25.00% ✗ -
Oct 1, 2024 Oct 21, 2024 Lerner James J CEO Neutral 67.5 +18,750 0.98% ✗ -
Oct 1, 2024 Oct 21, 2024 Gianella Kenneth P. CFO Neutral 82.5 +17,750 4.73% ✗ -
Oct 1, 2024 Oct 21, 2024 Spanjaard Henk Jan Chief Revenue Officer Neutral 85.0 +10,000 8.26% ✗ -
Oct 1, 2024 Oct 21, 2024 Cabrera Brian E SVP Chief Admin Ofcr & Secy Neutral 82.5 +13,750 3.70% ✗ -
Oct 1, 2024 Oct 21, 2024 Jaworksi Don Director Neutral 90.0 +24,000 32.65% ✗ -
Oct 1, 2024 Oct 21, 2024 White Yue Zhou Director Neutral 90.0 +24,000 23.35% ✗ -
Oct 1, 2024 Oct 21, 2024 Meyrath Hugues Director Neutral 90.0 +24,000 32.65% ✗ -
Oct 1, 2024 Oct 21, 2024 Tracy John R. Director Neutral 90.0 +12,000 100.00% ✗ -
Oct 1, 2024 Oct 21, 2024 Nash Laura A. Chief Accounting Officer Neutral 85.0 +7,500 8.13% ✗ -
Aug 13, 2024 Aug 15, 2024 PACIFIC INVESTMENT MANAGEMENT CO LLC 10% Owner Neutral 52.5 - 0.00% ✗ -
Jul 11, 2024 Jul 15, 2024 PACIFIC INVESTMENT MANAGEMENT CO LLC 10% Owner Neutral 52.5 - 0.00% ✗ -
Jul 8, 2024 Tracy John R. Director Neutral 52.5 - 0.00% ✗ -
Jun 17, 2024 Arden Todd Director Neutral 52.5 - 0.00% ✗ -
May 24, 2024 May 29, 2024 PACIFIC INVESTMENT MANAGEMENT CO LLC 10% Owner Neutral 52.5 - 0.00% ✗ -
Jan 1, 2024 Apr 23, 2024 Gianella Kenneth P. CFO Neutral 90.0 +150,000 66.67% ✗ -
Jan 1, 2024 Apr 23, 2024 Lerner James J CEO Neutral 90.0 +200,000 11.73% ✗ -
Jan 1, 2024 Apr 23, 2024 Spanjaard Henk Jan Chief Revenue Officer Neutral 90.0 +75,000 162.65% ✗ -
Jan 1, 2024 Apr 23, 2024 Cabrera Brian E SVP Chief Admin Ofcr & Secy Neutral 90.0 +150,000 67.60% ✗ -
Apr 12, 2024 Spanjaard Henk Jan Chief Revenue Officer Neutral 52.5 - 0.00% ✗ -
Apr 1, 2024 Apr 3, 2024 Nash Laura A. Chief Accounting Officer Neutral 90.0 +25,000 37.14% ✗ -
Nov 2, 2023 Nov 3, 2023 Cabrera Brian E SVP Chief Admin Ofcr & Secy Sell 47.5 -5,543 -2.44% ✗ $2.6K
Oct 10, 2023 Oct 12, 2023 Lerner James J CEO Sell 46.3 -36,045 -2.07% ✗ $21.8K
Oct 4, 2023 Oct 6, 2023 Cabrera Brian E SVP Chief Admin Ofcr & Secy Sell 52.5 -942 -0.41% ✗ $559.2
Oct 4, 2023 Oct 6, 2023 Nash Laura A. Chief Accounting Officer Sell 47.5 -888 -1.30% ✗ $527.1
Sep 5, 2023 Sep 6, 2023 Hurley John Chief Revenue Officer Sell 46.3 -42,662 -11.10% ✗ $26.5K
Sep 1, 2023 Sep 5, 2023 Gianella Kenneth P. CFO Neutral 90.0 +50,000 28.57% ✗ -
Jul 10, 2023 Jul 12, 2023 Cabrera Brian E SVP Chief Admin Ofcr & Secy Sell 46.3 -15,674 -6.42% ✗ $16.7K
Jul 10, 2023 Jul 12, 2023 Lerner James J CEO Sell 42.5 -158,893 -8.36% ✗ $169.7K
Jul 10, 2023 Jul 12, 2023 Hurley John Chief Revenue Officer Sell 46.3 -22,681 -5.57% ✗ $24.2K
Jul 10, 2023 Jul 12, 2023 Nash Laura A. Chief Accounting Officer Sell 47.5 -3,600 -5.01% ✗ $3.8K
Jul 1, 2023 Jul 5, 2023 Nash Laura A. Chief Accounting Officer Neutral 90.0 +50,000 229.44% ✗ -
Jun 13, 2023 Nash Laura A. Chief Accounting Officer Neutral 52.5 - 0.00% ✗ -
Jun 1, 2023 Jun 9, 2023 PACIFIC INVESTMENT MANAGEMENT CO LLC 10% Owner Neutral 52.5 - 0.00% ✗ -
May 2, 2023 May 4, 2023 Cabrera Brian E SVP Chief Admin Ofcr & Secy Sell 46.3 -30,915 -11.24% ✗ $29.4K
Feb 1, 2023 Feb 3, 2023 Gianella Kenneth P. CFO Neutral 90.0 +175,000 100.00% ✗ -
Jan 18, 2023 Gianella Kenneth P. CFO Neutral 52.5 - 0.00% ✗ -
Nov 9, 2022 Nov 28, 2022 Meyrath Hugues Director Neutral 90.0 +73,498 100.00% ✗ -
Nov 28, 2022 Meyrath Hugues Director Neutral 52.5 - 0.00% ✗ -
Nov 9, 2022 Nov 17, 2022 Jaworksi Don Director Neutral 90.0 +73,498 100.00% ✗ -
Nov 17, 2022 Jaworksi Don Director Neutral 52.5 - 0.00% ✗ -
Nov 2, 2022 Nov 3, 2022 Cabrera Brian E SVP Chief Admin Ofcr & Secy Sell 52.5 -863 -0.31% ✗ $1.2K
Nov 1, 2022 Nov 2, 2022 Cabrera Brian E SVP Chief Admin Ofcr & Secy Neutral 85.0 +25,000 9.97% ✗ -
Oct 11, 2022 Oct 12, 2022 Lerner James J CEO Sell 46.3 -32,888 -1.71% ✗ $37.8K
Oct 11, 2022 Oct 12, 2022 Moorehead Lewis W. Chief Accounting Officer Sell 47.5 -2,370 -1.16% ✗ $2.7K
Oct 5, 2022 Oct 7, 2022 Cabrera Brian E SVP Chief Admin Ofcr & Secy Sell 52.5 -724 -0.29% ✗ $915.1