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 1.5 times Talen Energy.
  • Talen Energy grew revenue faster over the last year (+18.6% vs +11.0%).
  • NRG Energy keeps more of each dollar of revenue as operating profit (6.1% vs 2.6%).
  • NRG Energy's price assumes faster free cash flow growth: about 10% a year, against 9% for Talen Energy (reverse DCF).

Side by side

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

MeasureNRGTLN
Market cap$23.3B$16.0B
Share price$107.97$378.57
Revenue (last fiscal year)$30.7B$2.6B
Free cash flow (last fiscal year)$766M$606M
Revenue growth, last year+11.0%+18.6%
Revenue growth per year, last 5 fiscal years+3.3%-5.1%
Operating margin6.1%2.6%
Net margin2.4%-5.4%
Return on equity16.1%-11.4%
P/E (trailing)111.5x—
Price / free cash flow30.4x39.1x
EV / EBITDA12.0x30.5x
FCF growth the price implies10.5%8.6%
Dividend yield1.8%—
Debt / equity7.23x8.31x
Fundamental gradeDF
Superinvestors holding it76
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%

Talen Energy

YearRevenueFree cash flowOp. margin
2014$4.6B$46M8.7%
2015$4.5B$317M-0.87%
2022$3.1B-$45M7.8%
2024$2.1B$171M10.7%
2025$2.6B$606M-3.5%

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%

Talen Energy · by segments, 2025

PJM$2.5B94%
Other$161M6%
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 Talen Energy?

NRG Energy (NRG), at $23.3B against $16.0B.

Which grows faster, NRG or TLN?

Talen Energy: revenue grew +18.6% over the last year, against +11.0%.

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