Deep Fission, Inc. (FISN)
Nasdaq: FISN · Electric Services · Berkeley, CA · filing with the SEC since 2022
Who runs Deep Fission, Inc.
Officers and directors as they report to the SEC on Forms 3, 4 and 5, named as filedChief executive, as filed
Muller Elizabeth
Chief Executive Officer. First filing Sep 2025, latest Mar 10, 2026, 0 filings in all.
Officers reporting now
7
of 12 people with a filing in the last fifteen months
Directors reporting now
5
12 people on the record since 2022
Officerssales are open-market, Sep 30, 2025 to Sep 30, 2026
| Name | Title as filed | First filing | Latest filing | Sales, 12 months |
|---|---|---|---|---|
| Muller Elizabeth | Chief Executive Officer | Sep 2025 | Mar 10, 2026 | none |
| Schmitz William Mark | Chief Financial Officer | Sep 2025 | Mar 10, 2026 | none |
| Brasel Michael Allen | Chief Operating Officer | Jan 2026 | Mar 10, 2026 | none |
| Muller Richard | Chief Technology Officer | Sep 2025 | Mar 10, 2026 | none |
| Peres Mark Wayne | Chief Nuclear Officer | Feb 2026 | Mar 10, 2026 | none |
| Gordon Jonathan H | General Counsel | Dec 2025 | Mar 10, 2026 | none |
| Jacobs Ian Seth | President, CEO, CFO, Secretary | Apr 2022 | Aug 28, 2025 | none |
Directorssales are open-market, Sep 30, 2025 to Sep 30, 2026
| Name | Role | First filing | Latest filing | Sales, 12 months |
|---|---|---|---|---|
| Angell Jonathon | director | Nov 2025 | Jul 27, 2026 | none |
| Glanville Thomas S | director | Dec 2025 | Jul 27, 2026 | none |
| Goldman Tepper Leslie | director | Nov 2025 | Jul 27, 2026 | none |
| Janover Blake | director | Dec 2025 | Jul 27, 2026 | none |
| Tompkins Mark N. | director | Apr 2022 | Sep 8, 2025 | none |
A person is listed as reporting now after a filing in the last fifteen months. The record shows when someone last filed; it does not say why they stopped. Each name links to the filings on sec.gov.