As of September 09, 2026, the three largest insider holders of MPTI are Mario J Gabelli (TenPercentOwner, 198.00K shares), Mario J Gabelli (TenPercentOwner, 171.20K shares), Mario J Gabelli (TenPercentOwner, 110.17K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Mario J Gabelli | TenPercentOwner | 110,171 | 0 | 110,171 | 31.6% | 20 Nov, 2024 |
| 2 | Marc Gabelli | Director | 45,840 | 0 | 45,840 | 13.2% | 28 Apr, 2026 |
| 3 | Madonna Educational Foundation Inc. Emg | Other | 40,097 | 0 | 40,097 | 11.5% | 12 Jan, 2024 |
| 4 | Linda M Biles | Executive Vp Finance | 28,682 | 0 | 28,682 | 8.2% | 15 Apr, 2026 |
| 5 | Cameron Pforr | Ceo And Cfo | 26,806 | 0 | 26,806 | 7.7% | 06 May, 2026 |
| 6 | James William Tivy | Chief Financial Officer | 25,004 | 0 | 25,004 | 7.2% | 20 Nov, 2023 |
| 7 | William Arnold Drafts | President | 22,217 | 0 | 22,217 | 6.4% | 23 Dec, 2025 |
| 8 | Michael J Jr Ferrantino | Chief Executive Officer | 19,611 | 0 | 19,611 | 5.6% | 13 Dec, 2023 |
| 9 | Hendi Susanto | Director | 9,154 | 0 | 9,154 | 2.6% | 23 Apr, 2026 |
| 10 | Bel Lazar | Director | 6,845 | 0 | 6,845 | 2.0% | 23 Mar, 2026 |
| 11 | John S Mega | Director | 5,586 | 0 | 5,586 | 1.6% | 23 Mar, 2026 |
| 12 | Robert V Jr Lapenta | Director | 4,509 | 0 | 4,509 | 1.3% | 23 Mar, 2026 |
| 13 | David M Goldman | Director | 2,599 | 0 | 2,599 | 0.7% | 23 Mar, 2026 |
| 14 | Ivan Arteaga | Director | 1,313 | 0 | 1,313 | 0.4% | 29 Apr, 2026 |
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.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 04 May, 2026 | Cameron Pforr | Ceo And Cfo | Disposed S | 840 | $66.78 | $56.10K | 26,806 | Direct |
| 10 Apr, 2026 | Ivan Arteaga | Director | Acquired X | 174 | $59.00 | $10.27K | 1,289 | Direct |
| 27 Apr, 2026 | Ivan Arteaga | Director | Acquired X | 24 | $59.00 | $1.42K | 1,313 | Direct |
| 13 Apr, 2026 | Ivan Arteaga | Director | Acquired X | 870 | $0.00 | $0 | 245 | Direct |
| 09 Apr, 2026 | Linda M Biles | Executive Vp Finance | Acquired S | 24,643 | $0.00 | $0 | 2,700 | Direct |
| 14 Apr, 2026 | Linda M Biles | Executive Vp Finance | Acquired S | 2,700 | $0.00 | $0 | 0 | Direct |
| 20 Apr, 2026 | Marc Gabelli | Director | Acquired X | 3,276 | $59.00 | $193.28K | 45,840 | Direct |
| 20 Apr, 2026 | Marc Gabelli | Director | Disposed X | 16,380 | $0.00 | $0 | 0 | Direct |
| 14 Apr, 2026 | Hendi Susanto | Director | Acquired X | 454 | $59.00 | $26.79K | 8,083 | Direct |
| 20 Apr, 2026 | Hendi Susanto | Director | Acquired X | 1,071 | $59.00 | $63.19K | 9,154 | Direct |
| 14 Apr, 2026 | Hendi Susanto | Director | Acquired X | 2,274 | $0.00 | $0 | 5,355 | Direct |
| 20 Apr, 2026 | Hendi Susanto | Director | Acquired X | 5,355 | $0.00 | $0 | 0 | Direct |
| 06 Apr, 2026 | William Arnold Drafts | President | Disposed S | 3,600 | $0.00 | $0 | 8,149 | Direct |
| 13 Apr, 2026 | William Arnold Drafts | President | Disposed S | 7,609 | $0.00 | $0 | 540 | Direct |
| 14 Apr, 2026 | William Arnold Drafts | President | Disposed S | 540 | $0.00 | $0 | 0 | Direct |
| 14 Apr, 2026 | Linda M Biles | Executive Vp Finance | Disposed S | 720 | $0.00 | $0 | 28,682 | Direct |
| 14 Apr, 2026 | Linda M Biles | Executive Vp Finance | Disposed S | 2,700 | $0.00 | $0 | 24,643 | Direct |
| 19 Mar, 2026 | Bel Lazar | Director | Acquired A | 242 | $0.00 | $0 | 6,845 | Direct |
| 19 Mar, 2026 | Marc Gabelli | Director | Acquired A | 242 | $0.00 | $0 | 42,564 | Direct |
| 19 Mar, 2026 | John S Mega | Director | Acquired A | 242 | $0.00 | $0 | 5,586 | Direct |