A Look at Talen Energy's Valuation Following S&P Index Addition and Expanded AWS Agreement

Kshitija Bhandaru

If you follow Talen Energy (NasdaqGS:TLN), you may have noticed its name pop up in a big way lately. The company was just added to a handful of major S&P indices, including the S&P 1000 and S&P Composite 1500. This move often means more eyes, especially from institutional investors, are on the stock. On top of that, Talen recently expanded its agreement with Amazon Web Services, locking in more premium-priced power sales and smoothing over regulatory wrinkles. There is no shortage of fresh reasons for investors to be paying closer attention.

The market has clearly taken notice. Over the past year, Talen’s stock has surged 166%, and its upward trend has strengthened even further in recent months. The stock is up by more than 52% over the past 3 months alone, suggesting that momentum, helped by business wins and index inclusions, is building. After tough years and a major turnaround out of bankruptcy, this new growth trajectory is hard to ignore, especially as revenue and net income have both posted double-digit gains over the past year.

With shares climbing so much, is there more upside ahead or has the market already priced in Talen’s improving prospects?

Most Popular Narrative: 2.4% Undervalued

Based on the most widely followed narrative, Talen Energy is currently considered slightly undervalued, trading just beneath what analysts estimate to be its fair value. This moderately optimistic view is rooted in expectations of significant earnings and revenue growth supported by strategic moves in the energy sector.

Major expansion and long-term extension of carbon-free nuclear power supply to AWS (1.9 GW through 2042) provide Talen with stable, inflation-protected contracted revenue streams from a blue-chip hyperscaler customer. This arrangement de-risks cash flows and enhances margin visibility.

Curious about why Talen's future is so closely linked to these power supply deals and a new cash flow structure? The narrative is built on projections more commonly seen in high-flying tech names, with aggressive targets for both profit margins and earnings. Want to know which bold assumptions could push Talen's valuation even higher? The answer might surprise you, and the underlying math is more dramatic than you might think.

Result: Fair Value of $398.66 (UNDERVALUED)

Have a read of the narrative in full and understand what's behind the forecasts.

However, ongoing reliance on fossil fuels and elevated debt levels could quickly challenge Talen's outlook if market conditions or energy policy shift unexpectedly.

Find out about the key risks to this Talen Energy narrative.

Another View: A Look at Current Market Pricing

While some see Talen as undervalued based on future earnings growth, a different approach looks at how it is priced against other renewable energy companies. By this standard, the shares appear expensive. Could the market be getting ahead of itself, or are investors betting on exceptional growth?

See what the numbers say about this price — find out in our valuation breakdown.
NasdaqGS:TLN PE Ratio as at Sep 2025
Stay updated when valuation signals shift by adding Talen Energy to your watchlist or portfolio. Alternatively, explore our screener to discover other companies that fit your criteria.

Build Your Own Talen Energy Narrative

If you want to dive deeper, sift through the numbers, and form your own perspective, you can craft a custom view of Talen in just a few minutes. Do it your way.

A great starting point for your Talen Energy research is our analysis highlighting 2 key rewards and 2 important warning signs that could impact your investment decision.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.

Valuation is complex, but we're here to simplify it.

Discover if Talen Energy might be undervalued or overvalued with our detailed analysis, featuring fair value estimates, potential risks, dividends, insider trades, and its financial condition.

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