Deep Fission, Inc. (FISN) vs Perma-Fix Environmental Services, Inc. (PESI)
A side-by-side comparison of Deep Fission, Inc. and Perma-Fix Environmental Services, Inc. across valuation, profitability, dividends, and growth — built entirely from reported fundamentals, as of October 6, 2026. Differences are shown without an overall score or investment verdict.
FISN
Deep Fission, Inc.
$5.52IndustrialsDelayed quote: Oct 6, 2026, 1:18 PM EDT
PESI
Perma-Fix Environmental Services, Inc.
$15.65IndustrialsDelayed quote: Oct 6, 2026, 1:15 PM EDT
Total return — FISN vs PESI
growth of $100 · dividends reinvested · last 1yFISN -63.0% (-63.0%/yr)PESI +56.9% (+56.9%/yr)PESI compounded faster over this window
FISN PESI
FISN vs PESI: by the numbers
- •FISN is the larger company ($333M vs $332M market cap).
- •Both run net losses; FISN's is the smaller (0.00% vs -37.04% net margin).
Metrics side by side
Valuation
| Metric | FISN | PESI |
|---|---|---|
| P/S ratio | N/A | 5.80 |
| P/B ratio | 3.37 | 5.69 |
Profitability
| Metric | FISN | PESI |
|---|---|---|
| Gross margin | 0.00% | 9.59% |
| Operating margin | 0.00% | -19.03% |
| Net margin | 0.00% | -37.04% |
| ROE | -107.56% | -36.31% |
| ROIC | -72.19% | -25.42% |
Growth (annualized)
| Metric | FISN | PESI |
|---|---|---|
| Revenue CAGR (5Y) | N/A | -10.18% |
| Total return CAGR (5Y) | N/A | 17.15% |
Go deeper
Dig into the metrics
Figures are sourced from reported fundamentals and the latest end-of-day price. This comparison is informational only and is not investment advice. Past performance does not predict future results. See our methodology. Compiled by TGMCharts Research · data verified October 6, 2026.