Mark N. Tompkins 13D and 13G filings for :
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2026-06-01 7:47 pm Purchase | 2026-05-22 | 13G | Matternet, Inc. | Mark N. Tompkins | 4,729,166 9.900% | 1,579,166 (+50.13%) | Filing |
| 2026-05-15 5:15 pm Purchase | 2026-03-31 | 13G | Deep Isolation Nuclear Inc. | Mark N. Tompkins | 3,150,000 5.500% | 875,000 (+38.46%) | Filing |