🕵️ DEEP Isolation Nuclear, Inc. ($DBHL)
SEC insider & ownership activity, last 12 months · CIK 1918080 · every row links its SEC filing
Insiders were quiet over the last 12 months – no open-market buys or sells. Mark N. Tompkins added 4.0% → 5.5%. No red-flag 8-Ks in the window.
Insider flow
0 buyers, $0 (0 lots) · 0 sellers, $0 (0 lots)
No open-market insider transactions in the last 12 months.
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Elizabeth Muller | 22.1% | 13D | Jul 23, 2025 | filing ↗ | |
| Warren E. Spieker, JR., Individually and AS (trustee) | 10.3% | 13G | Aug 14, 2025 | filing ↗ | |
| Robert L. Mercer | 6.5% | 13G | Aug 14, 2025 | filing ↗ | |
| Richard Muller | 5.8% | 13G | Aug 18, 2025 | filing ↗ | |
| Mark N. Tompkins | 5.5% | 13G | May 15, 2026 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Reg FD disclosure (7.01) | Jul 23, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 23, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 16, 2026 | filing ↗ |
| Earnings (2.02) | May 14, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 14, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 14, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Apr 7, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 7, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 24, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 24, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 17, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 17, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 17, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 3, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 3, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 3, 2026 | filing ↗ |
| Material agreement (1.01) | Jan 28, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 28, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 21, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 21, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 21, 2026 | filing ↗ |
| Officer/director changes (5.02) | Nov 18, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 18, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 18, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 17, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Oct 17, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 17, 2025 | filing ↗ |
| Officer/director changes (5.02) | Sep 25, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 25, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 25, 2025 | filing ↗ |