CIK 0001918102 · Non-accelerated filer<br>Smaller reporting company<br>Emerging growth company
DEEP FISSION, INC.
Sign in to watch- Ticker
- FISN
- Exchange
- Nasdaq
- Industry
- Electric Services
- FY end
- Dec 31
- Entity type
- operating
- EIN
- 932463886
- Phone
- (707) 400-0778
- Business address
- 2001 ADDISON ST., SUITE 300, BERKELEY, CA, 94704
- Former names
- Surfside Acquisition Inc.
- Open-market buys, last 90 days
- $21,612
- in 1 filing
- Open-market sales, last 90 days
- $0
- in 0 filings
Net +$21,612. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
Who's trading
90 days
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2025-12-19 | JANOVER BLAKE Director | Grant or award · Restricted Stock Unit | +100,000 | 100,000 | ||
| 2025-12-09 | Muller Elizabeth Chief Executive Officer | Grant or award | +549,451 | 549,451 | ||
| 2025-12-09 | Muller Elizabeth Chief Executive Officer | Grant or award · Stock Option (right to buy) | +183,150 | 994,849 | ||
| 2025-11-12 | GLANVILLE THOMAS S Director | Grant or award · Restricted Stock Unit | +100,000 | 100,000 | ||
| 2025-11-12 | Angell Jonathon Director | Grant or award · Restricted Stock Unit | +100,000 | 100,000 | ||
| 2025-11-12 | Goldman Tepper Leslie Director | Grant or award · Restricted Stock Units | +100,000 | 100,000 | ||
| 2025-11-07 | Brasel Michael Allen See Remarks | Grant or award · Employee Stock Option (right to buy) | +70,000 | 70,000 | ||
| 2025-11-07 | Gordon Jonathan H See Remarks | Grant or award · Employee Stock Option (right to buy) | +85,000 | 85,000 | ||
| 2025-09-05 | Muller Richard Chief Technology Officer | Grant or award | +5,196,426 | 5,196,426 | ||
| 2025-09-05 | Muller Elizabeth President and Chief Executive | Grant or award | +5,196,426 | 5,196,426 | ||
| 2025-09-05 | Muller Elizabeth President and Chief Executive | Grant or award | +5,057,855 | 5,057,855 | ||
| 2025-09-05 | Schmitz William Mark Chief Financial Officer | Grant or award | +103,928 | 103,928 | ||
| 2025-09-05 | Tompkins Mark N. See Remarks | Other disposition | −2,833,333 | 1,891,667 | ||
| 2025-08-26 | Tompkins Mark N. Director | Sale | −25,000 | $0.00 | $3 | 4,725,000 |
| 2025-08-26 | Jacobs Ian Seth President, CEO, CFO, Secretary | Purchase | +25,000 | $0.00 | $3 | 275,000 |
Page 2 of 2 · 35 trades