Deep Fission (FISN) insider trading
Insider activity, historical context and SEC filings · data through Nov 13, 2026
Insiders put their own money in: $22K of open-market buys. See how similar setups did below.
Label: Net buying · based on open-market trades (codes P and S), last 12 months. Not a rating or advice.- 90-day result for Elizabeth Muller's $22K buy: in on Feb 11, 2027. See the 7- and 30-day results ↓
Purchase Elizabeth Muller, CEO, President bought 10,000 shares at $2.16 ($22K).
- Trade date
- Nov 11, 2026
- Disclosed to the SEC
- Nov 13, 2026
- Type
- Open-market purchase (code P)
Read the original SEC filing ↗All FISN insider trades ↓
Insiders have two business days to report a trade to the SEC, so filings (and our alerts) always come after the trade, never in real time.
FISN insider transactions (Form 4)
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Nov 13 NewSEC | Elizabeth MullerCEO, PresidentFirst buyNew position | Buy | 10,000new position | $2.16 | $22K | -4.7% | — |
Similar past setups: not applicable. There aren't enough comparable past cases for FISN's latest buying to report odds. When insiders buy, this section shows how 16,899 similar past buys did over 90 days. How we calculate this →
Play with FISN in the Research Lab
Pre-set to FISN's latest insider buy of $10K or more (Nov 13, 2026: Elizabeth Muller, $22K). Tap to change anything.
Quick backtest: did buys like this beat the market?
Tap a setting to see how 16,899 past insider buys did.
Share price and insider trades
Deep Fission insider trading at a glance (Nov 13, 2026): in the past 12 months, 1 insider bought $22K and 0 sold $0 of FISN stock on the open market.
By InsiderPrint Research Desk · Updated · Sources: SEC EDGAR Form 4 filings · How we calculate this
FISN insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | $22K | 1 | — | 0 |
Valuation, profit and volume
Source: Yahoo Finance, as of Nov 14, 2026. Volume and paper profit use daily closing prices.
Summary
Over the past 12 months, 1 DEEP FISSION, INC. insider reported open-market purchases totaling $22K, while 0 insiders reported sales totaling $0.
FISN stock news and SEC filings
Recent 8-K filings and headlines. Tone is scored from the headline wording; “Policy” marks regulatory, trade or government topics.
What happened after FISN insiders bought
Each open-market purchase, measured from the day the filing became public, next to the S&P 500 over the same days. Losses included; "pending" means the days haven't passed yet.
| Filed | Insider | Bought | 7 days | 30 days | 90 days |
|---|---|---|---|---|---|
| Nov 13, 2026 | Elizabeth MullerCEO, President | $22K | pending | pending | pending |
Insiders at DEEP FISSION, INC.
| Insider | Bought | Sold | Last filing | Past buys beat S&P | Score |
|---|---|---|---|---|---|
| Elizabeth MullerCEO, President | $22K | — | Nov 13, 2026 | — | — |
Insider activity at other Industrials companies
Same sector, ranked by insider buying in the last 90 days.
FISN stock: common questions
Are DEEP FISSION, INC. insiders buying FISN stock?
In the past 12 months, 1 insider reported open-market purchases of FISN worth $22K. The latest was CEO, President Elizabeth Muller bought $22K of FISN at $2.16 — first open-market purchase in our records; opens a new position.
Are DEEP FISSION, INC. insiders selling FISN stock?
No. No DEEP FISSION, INC. insider reported an open-market sale of FISN in the past 12 months.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is FISN's 52-week range?
Over the past year FISN has traded between $1.50 and $14.56. It last closed at $2.06 on Nov 13, 2026.