Compare WEC Energy Group, Inc. (WEC) vs Ameren Corporation (AEE) Stock

Ameren Corporation (AEE) offers the better valuation at 21.2x trailing P/E (21.1x forward), making it the more compelling value choice. Analysts rate WEC Energy Group, Inc. (WEC) a "Hold" — based on 34 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, Ameren Corporation (AEE) is the cheapest at 21.2x versus WEC Energy Group, Inc. at 24.2x. On forward P/E, WEC Energy Group, Inc. is actually cheaper at 20.9x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Ameren Corporation wins at 2.39x versus WEC Energy Group, Inc.'s 4.21x.

Over the past 5 years, Ameren Corporation (AEE) delivered a total return of +76.1%, compared to +60.5% for WEC Energy Group, Inc. (WEC). A $10,000 investment in AEE five years ago would be worth approximately $18K today (assuming dividends reinvested). Over 10 years, the gap is even starker: AEE returned +187.8% versus WEC's +155.9%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), WEC Energy Group, Inc. (WEC) is the lower-risk stock at 0.09β versus Ameren Corporation's 0.18β — meaning AEE is approximately 102% more volatile than WEC relative to the S&P 500. On balance sheet safety, WEC Energy Group, Inc. (WEC) carries a lower debt/equity ratio of 9% versus 147% for Ameren Corporation — giving it more financial flexibility in a downturn.

Ameren Corporation (AEE) is the more profitable company, earning 16.5% net margin versus 15.9% for WEC Energy Group, Inc. — meaning it keeps 16.5% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: WEC leads at 24.2% versus 23.0% for AEE. At the gross margin level — before operating expenses — WEC leads at 50.5%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential. By this metric, Ameren Corporation (AEE) is the more undervalued stock at a PEG of 2.39x versus WEC Energy Group, Inc.'s 4.21x. Both stocks trade at elevated growth-adjusted valuations, so expected growth needs to materialise. On forward earnings alone, WEC Energy Group, Inc. (WEC) trades at 20.9x forward P/E versus 21.1x for Ameren Corporation — 0.2x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for WEC: 3.5% to $121.00.

All stocks in this comparison pay dividends. WEC Energy Group, Inc. (WEC) offers the highest yield at 3.0%, versus 2.5% for Ameren Corporation (AEE).

For long-horizon retirement investors, WEC Energy Group, Inc. (WEC) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0.09), 3.0% yield, +155.9% 10Y return). Both have compounded well over 10 years (WEC: +155.9%, AEE: +187.8%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Utilities sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.