The short version

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

  • Vistra is the larger company, worth $55.1B, about 3.4 times Talen Energy.
  • Talen Energy grew revenue faster over the last year (+18.6% vs -5.5%).
  • Vistra keeps more of each dollar of revenue as operating profit (18.6% vs 2.6%).
  • Vistra's price assumes faster free cash flow growth: about 15% 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.

MeasureTLNVST
Market cap$16.0B$55.1B
Share price$378.57$166.72
Revenue (last fiscal year)$2.6B$17.7B
Free cash flow (last fiscal year)$606M$1.3B
Revenue growth, last year+18.6%-5.5%
Revenue growth per year, last 5 fiscal years-5.1%+10.1%
Operating margin2.6%18.6%
Net margin-5.4%11.6%
Return on equity-11.4%40.5%
P/E (trailing)—27.3x
Price / free cash flow39.1x426.7x
EV / EBITDA30.5x11.2x
FCF growth the price implies8.6%14.6%
Dividend yield—0.57%
Debt / equity8.31x6.77x
Fundamental gradeFD
Superinvestors holding it66
Insider purchases, last 12 months08

Results from SEC filings

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

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%

Vistra

YearRevenueFree cash flowOp. margin
2021$12.1B-$1.2B-12.5%
2022$13.7B-$816M-8.6%
2023$14.8B$3.8B18.0%
2024$17.2B$2.5B23.7%
2025$17.7B$1.3B10.7%

Where the revenue comes from

Talen Energy · by segments, 2025

PJM$2.5B94%
Other$161M6%

Vistra · by segments, 2025

Retail$13.0B74%
East$3.3B19%
Texas$918M5%
West$328M2%
Asset Closure$4M0%
Compare them in fullFifteen years of statements, quarterly results, DCF and IRR models, and any number of peers side by side.
Open TLN in Investingly

Questions

Which is bigger, Talen Energy or Vistra?

Vistra (VST), at $55.1B against $16.0B.

Which grows faster, TLN or VST?

Talen Energy: revenue grew +18.6% over the last year, against -5.5%.

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