The short version

From the latest prices and each company's SEC filings. Who's ahead on each measure, not which to buy.

  • NRG Energy is the larger company, worth $23.3B, about 4.8 times Oklo.

Side by side

The stronger figure is shaded where higher (or, for valuation multiples, lower) reads as better. How the implied growth works.

MeasureNRGOKLO
Market cap$23.3B$4.8B
Share price$107.97$34.70
Revenue (last fiscal year)$30.7B—
Free cash flow (last fiscal year)$766M-$115M
Revenue growth, last year+11.0%—
Revenue growth per year, last 5 fiscal years+3.3%—
Operating margin6.1%—
Net margin2.4%—
Return on equity16.1%-4.7%
P/E (trailing)111.5x—
Price / free cash flow30.4x—
EV / EBITDA12.0x—
FCF growth the price implies10.5%—
Dividend yield1.8%—
Debt / equity7.23x0.03x
Fundamental gradeDD
Superinvestors holding it71
Insider purchases, last 12 months00

Results from SEC filings

Revenue and free cash flow by fiscal year, from each company's 10-K filings.

NRG Energy

YearRevenueFree cash flowOp. margin
2021$27.0B$224M12.4%
2022$31.5B-$7M6.4%
2023$28.8B-$819M1.3%
2024$28.1B$1.8B8.6%
2025$30.7B$766M6.0%

Oklo

YearRevenueFree cash flowOp. margin
2022———
2023—-$16M—
2024—-$39M—
2025—-$115M—

Where the revenue comes from

NRG Energy · by segments, 2025

East$14.1B46%
Texas$11.1B37%
West/Other$3.2B10%
Vivint Smart Home$2.0B7%

Oklo

No segment breakdown reported.

Compare them in fullFifteen years of statements, quarterly results, DCF and IRR models, and any number of peers side by side.
Open NRG in Investingly

Questions

Which is bigger, NRG Energy or Oklo?

NRG Energy (NRG), at $23.3B against $4.8B.

Prices and ratios as of the last daily update; statements from SEC filings. Information only, not investment advice.