Deep Fission, Inc. (FISN) vs X-Energy, Inc. Class A Common Stock (XE)

A side-by-side comparison of Deep Fission, Inc. and X-Energy, Inc. Class A Common Stock 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.

$330M

$5.47IndustrialsDelayed quote: Oct 6, 2026, 4:00 PM EDT

X-Energy, Inc. Class A Common Stock

$339M

$15.45IndustrialsDelayed quote: Oct 6, 2026, 4:00 PM EDT

Total return — FISN vs XE

growth of $100 · dividends reinvested · last 1y

FISN -63.0% (-63.0%/yr)XE -33.2% (-33.2%/yr)XE compounded faster over this window

FISN XE

FISN vs XE: by the numbers

•XE is the larger company ($339M vs $330M market cap).
•Both run net losses; FISN's is the smaller (0.00% vs -357.27% net margin).

Metrics side by side

Valuation

Metric	FISN	XE
P/B ratio	3.34	0.19

Profitability

Metric	FISN	XE
Gross margin	0.00%	-47.91%
Operating margin	0.00%	-156.09%
Net margin	0.00%	-357.27%
ROE	-107.56%	-46.28%
ROIC	-72.19%	-14.75%

Go deeper

Full FISN analysis Full XE analysis Interactive comparison tool

Dig into the metrics

Deep Fission ROE X-Energy, Inc. Class A Common Stock ROE Deep Fission operating margin X-Energy, Inc. Class A Common Stock operating margin Deep Fission revenue growth X-Energy, Inc. Class A Common Stock revenue growth Deep Fission free cash flow X-Energy, Inc. Class A Common Stock free cash flow

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.