CSTM vs AA

For growth investors, Constellium SE (CSTM) is the stronger pick with 15.

2% revenue growth year-over-year, versus 4. 5% for Alcoa Corporation (AA). Alcoa Corporation (AA) offers the better valuation at 14. 2x trailing P/E (9. 1x forward), making it the more compelling value choice. Analysts rate Constellium SE (CSTM) a "Buy" — based on 17 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, Alcoa Corporation (AA) is the cheapest at 14.

2x versus Constellium SE at 17. 4x. On forward P/E, Alcoa Corporation is actually cheaper at 9. 1x.

Over the past 5 years, Constellium SE (CSTM) delivered a total return of +95.

4%, compared to +63. 1% for Alcoa Corporation (AA). Over 10 years, the gap is even starker: CSTM returned +491. 0% versus AA's +188. 8%. 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), Alcoa Corporation (AA) is the lower-risk stock at 1.

77β versus Constellium SE's 1. 85β — meaning CSTM is approximately 4% more volatile than AA relative to the S&P 500. On balance sheet safety, Alcoa Corporation (AA) carries a lower debt/equity ratio of 0% versus 2% for Constellium SE — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Constellium SE (CSTM) is pulling ahead at 15.

2% versus 4. 5% for Alcoa Corporation (AA). On earnings-per-share growth, the picture is similar: Alcoa Corporation grew EPS 1486% year-over-year, compared to 418. 9% for Constellium SE. Over a 3-year CAGR, AA leads at -0. 1% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Alcoa Corporation (AA) is the more profitable company, earning 9.

0% net margin versus 3. 2% for Constellium SE — meaning it keeps 9. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: AA leads at 7. 6% versus 5. 6% for CSTM. At the gross margin level — before operating expenses — AA leads at 13. 6%, 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.

On forward earnings alone, Alcoa Corporation (AA) trades at 9.

1x forward P/E versus 10. 6x for Constellium SE — 1. 5x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for AA: 8. 8% to $68. 80.

In this comparison, AA (0.

6% yield) pays a dividend. CSTM does not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Alcoa Corporation (AA) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (0.

6% yield, +188. 8% 10Y return). Constellium SE (CSTM) carries a higher beta of 1. 85 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (AA: +188. 8%, CSTM: +491. 0%), 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 Basic Materials sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: CSTM is a small-cap high-growth stock; AA is a mid-cap deep-value stock. AA pays a dividend while CSTM does not, making them suitable for different income and tax situations. 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.