As of September 12, 2026, the three largest insider holders of MX are Young-Joon Kim (Director And Ceo, 590.97K shares), Camillo Martino (Director, 410.66K shares), Shinyoung Park (Chief Financial Officer, 327.95K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Young-Joon Kim | Director And Ceo | 590,970 | 0 | 590,970 | 17.7% | 03 Jun, 2025 |
| 2 | Camillo Martino | Director | 410,661 | 0 | 410,661 | 12.3% | 18 Aug, 2026 |
| 3 | Shinyoung Park | Chief Financial Officer | 327,954 | 0 | 327,954 | 9.8% | 03 Jun, 2026 |
| 4 | Theodore S Kim | Officer | 293,200 | 0 | 293,200 | 8.8% | 03 Jan, 2025 |
| 5 | Chae Lee | Chief Executive Officer | 288,750 | 0 | 288,750 | 8.7% | 06 Jul, 2026 |
| 6 | Ilbok Lee | Director | 275,026 | 0 | 275,026 | 8.3% | 03 Jul, 2025 |
| 7 | Gilbert E Nathan | Director | 265,682 | 0 | 265,682 | 8.0% | 03 Aug, 2026 |
| 8 | Seunghoon Lee | Chief Of Manufacturing | 158,201 | 0 | 158,201 | 4.8% | 03 Jun, 2026 |
| 9 | Woung Moo Lee | Officer | 151,903 | 0 | 151,903 | 4.6% | 13 Jun, 2024 |
| 10 | Gary W. Tanner | Director | 131,009 | 0 | 131,009 | 3.9% | 05 Jun, 2023 |
| 11 | Melvin L Keating | Director | 124,445 | 0 | 124,445 | 3.7% | 05 Jun, 2023 |
| 12 | Kyo-Hwa Liz Chung | Director | 100,789 | 0 | 100,789 | 3.0% | 17 Feb, 2026 |
| 13 | Cristiano Amoruso | Director | 75,057 | 0 | 75,057 | 2.3% | 03 Aug, 2026 |
| 14 | Jinseok Yang | Officer | 70,742 | 0 | 70,742 | 2.1% | 04 Mar, 2025 |
| 15 | Chan Ho Park | Officer | 42,012 | 0 | 42,012 | 1.3% | 03 Jan, 2024 |
| 16 | Young Soo Woo | Officer | 23,697 | 0 | 23,697 | 0.7% | 04 Jan, 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.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 15 Aug, 2026 | Camillo Martino | Director | Acquired A | 6,764 | $0.00 | $0 | 410,661 | Direct |
| 01 Aug, 2026 | Camillo Martino | Director | Acquired A | 39,286 | $0.00 | $0 | 403,897 | Direct |
| 01 Aug, 2026 | Gilbert E Nathan | Director | Acquired A | 51,191 | $0.00 | $0 | 265,682 | Direct |
| 01 Aug, 2026 | Cristiano Amoruso | Director | Acquired A | 46,429 | $0.00 | $0 | 75,057 | Direct |
| 01 Jul, 2026 | Chae Lee | Chief Executive Officer | Acquired A | 288,750 | $0.00 | $0 | 288,750 | Direct |
| 01 Jul, 2026 | Chae Lee | Chief Executive Officer | Acquired A | 148,750 | $0.00 | $0 | 148,750 | Direct |
| 01 Jun, 2026 | Seunghoon Lee | Chief Of Manufacturing | Acquired A | 30,000 | $0.00 | $0 | 158,201 | Direct |
| 01 Jun, 2026 | Shinyoung Park | Chief Financial Officer | Acquired A | 112,500 | $0.00 | $0 | 327,954 | Direct |
| 16 Mar, 2026 | Gilbert E Nathan | Director | Acquired P | 21,994 | $2.87 | $63.05K | 158,200 | Indirect |
| 12 Mar, 2026 | Gilbert E Nathan | Director | Acquired P | 25,000 | $2.75 | $68.68K | 123,200 | Indirect |
| 13 Mar, 2026 | Gilbert E Nathan | Director | Acquired P | 13,006 | $2.79 | $36.25K | 136,206 | Indirect |
| 15 Feb, 2026 | Kyo-Hwa Liz Chung | Director | Acquired A | 2,946 | $0.00 | $0 | 100,789 | Direct |
| 15 Feb, 2026 | Cristiano Amoruso | Director | Acquired A | 28,628 | $0.00 | $0 | 28,628 | Direct |
| 15 Feb, 2026 | Gilbert E Nathan | Director | Acquired A | 1,478 | $0.00 | $0 | 214,491 | Direct |
| 15 Nov, 2025 | Kyo-Hwa Liz Chung | Director | Acquired A | 3,160 | $0.00 | $0 | 97,843 | Direct |
| 15 Nov, 2025 | Gilbert E Nathan | Director | Acquired A | 6,320 | $0.00 | $0 | 213,013 | Direct |
| 01 Oct, 2025 | Camillo Martino | Director, Officer | Acquired A | 105,484 | $0.00 | $0 | 364,611 | Direct |
| 22 Aug, 2025 | Camillo Martino | Director, Officer | Acquired P | 30,000 | $2.84 | $85.29K | 259,127 | Direct |
| 01 Jul, 2025 | Gilbert E Nathan | Director | Acquired A | 50,650 | $0.00 | $0 | 206,693 | Direct |
| 01 Jul, 2025 | Camillo Martino | Director | Acquired A | 53,247 | $0.00 | $0 | 229,127 | Direct |