As of September 29, 2026, the three largest insider holders of MAMO are David Shan (Chief Executive Officer, 32.16Mn shares), Yunhao Chen (Chief Financial Officer, 133.33K shares), Michael Glenn Smith (Vice President, 50.00K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | David Shan | Chief Executive Officer | 32,160,000 | 0 | 32,160,000 | 99.4% | 02 Jun, 2025 |
| 2 | Yunhao Chen | Chief Financial Officer | 133,334 | 0 | 133,334 | 0.4% | 02 Jun, 2025 |
| 3 | Michael Glenn Smith | Vice President | 50,000 | 0 | 50,000 | 0.2% | 02 Jun, 2025 |
| 4 | Mark Sheffield | Director | 9,000 | 0 | 9,000 | 0.0% | 02 Jun, 2025 |
| 5 | Ting Zhu | Director | 9,000 | 0 | 9,000 | 0.0% | 02 Jun, 2025 |
| 6 | Paolo Pietrogrande | Director | 9,000 | 0 | 9,000 | 0.0% | 03 Jun, 2025 |
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 |
|---|---|---|---|---|---|---|---|---|
| 29 May, 2025 | Paolo Pietrogrande | Director | Acquired A | 2,250 | $0.00 | $0 | 9,000 | Direct |
| 29 May, 2025 | Michael Glenn Smith | Other | Acquired A | 25,000 | $0.00 | $0 | 50,000 | Direct |
| 29 May, 2025 | David Shan | Chief Executive Officer | Acquired A | 37,500 | $0.00 | $0 | 32,160,000 | Direct |
| 29 May, 2025 | Ting Zhu | Director | Acquired A | 2,250 | $0.00 | $0 | 9,000 | Direct |
| 29 May, 2025 | Mark Sheffield | Director | Acquired A | 2,250 | $0.00 | $0 | 9,000 | Direct |
| 29 May, 2025 | Yunhao Chen | Chief Financial Officer | Acquired A | 25,000 | $0.00 | $0 | 133,334 | Direct |
| 20 Mar, 2025 | Paolo Pietrogrande | Director | Acquired A | 2,250 | $0.00 | $0 | 6,750 | Direct |
| 20 Mar, 2025 | Mark Sheffield | Director | Acquired A | 2,250 | $0.00 | $0 | 6,750 | Direct |
| 20 Mar, 2025 | Ting Zhu | Director | Acquired A | 2,250 | $0.00 | $0 | 6,750 | Direct |
| 02 Jan, 2025 | Mark Sheffield | Director | Acquired P | 50 | — | — | 4,917 | Direct |
| 22 Nov, 2024 | David Shan | Chief Executive Officer | Acquired A | 37,500 | $0.00 | $0 | 32,122,500 | Direct |
| 02 Dec, 2024 | Yunhao Chen | Chief Financial Officer | Acquired A | 27,778 | $0.00 | $0 | 108,334 | Direct |
| 22 Nov, 2024 | Mark Sheffield | Director | Acquired A | 2,250 | $0.00 | $0 | 4,500 | Direct |
| 22 Nov, 2024 | Ting Zhu | Director | Acquired A | 2,250 | $0.00 | $0 | 4,500 | Direct |
| 22 Nov, 2024 | Michael Glenn Smith | Vice President | Acquired A | 25,000 | $0.00 | $0 | 25,000 | Direct |
| 22 Nov, 2024 | Paolo Pietrogrande | Director | Acquired A | 2,250 | $0.00 | $0 | 4,500 | Direct |
| 22 Nov, 2024 | David Shan | Chief Executive Officer | Acquired A | 37,500 | $0.00 | $0 | 34,037,500 | Direct |
| 22 Nov, 2024 | Yunhao Chen | Chief Financial Officer | Acquired A | 25,000 | $0.00 | $0 | 80,556 | Direct |
| 22 Aug, 2024 | Ting Zhu | Director | Acquired A | 2,250 | $0.00 | $0 | 2,250 | Direct |
| 22 Aug, 2024 | Mark Sheffield | Director | Acquired A | 2,250 | $0.00 | $0 | 2,250 | Direct |