sellWeak
Mark N. Tompkins sold $3 of FISN
director, owner at DEEP FISSION, INC.. 25,000 shares at an average of $0.00, traded Aug 26, 2025, filed Aug 28, 2025.
Warning score
15Value
$3
25,000 shares
Holdings after
4,725,000
-1% from before
From 52-week low
-
no price yet
From 52-week high
-
no price yet
Score components
- +15RoleDirector
- 0Trade size$2 at market
- 0Share of holdings soldSold 0.5% of holdings
- 0ClusterNo other insider selling within 14 days
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
Rows in this filing
Every transaction in Form 4 0001213900-25-081957, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Aug 26, 2025 | SOpen-market sale Common Stock | -25,000 | $0.00 | $3 | 4,725,000 | Aug 28, 2025 |
Related signals
Other insiders at DEEP FISSION, INC. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 28Weak | FISNbuy DEEP FISSION, INC. | Ian Seth Jacobs President, CEO, CFO, Secretary | $3 25,000 shares | +10% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.