AMBP vs ATI vs AA vs CENX vs KALU

For growth investors, Century Aluminum Company (CENX) is the stronger pick with 13.

9% revenue growth year-over-year, versus 4. 5% for Alcoa Corporation (AA). Alcoa Corporation (AA) offers the better valuation at 14. 1x trailing P/E (9. 0x forward), making it the more compelling value choice. Analysts rate ATI Inc. (ATI) a "Buy" — based on 29 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.

1x versus Century Aluminum Company at 144. 2x. On forward P/E, Century Aluminum Company is actually cheaper at 5. 8x — notably different from the trailing picture, reflecting expected earnings growth.

Over the past 5 years, ATI Inc.

(ATI) delivered a total return of +572. 7%, compared to -46. 1% for Ardagh Metal Packaging S. A. (AMBP). Over 10 years, the gap is even starker: ATI returned +1050% versus AMBP's -44. 4%. 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), Ardagh Metal Packaging S.

A. (AMBP) is the lower-risk stock at 0. 81β versus Alcoa Corporation's 1. 77β — meaning AA is approximately 118% more volatile than AMBP relative to the S&P 500. On balance sheet safety, Alcoa Corporation (AA) carries a lower debt/equity ratio of 0% versus 136% for Kaiser Aluminum Corporation — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Century Aluminum Company (CENX) is pulling ahead at 13.

9% 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 -87. 2% for Century Aluminum Company. Over a 3-year CAGR, ATI leads at 6. 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 0. 2% for Ardagh Metal Packaging S. A. — meaning it keeps 9. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ATI leads at 13. 8% versus 5. 0% for AMBP. At the gross margin level — before operating expenses — ATI leads at 21. 8%, 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, Century Aluminum Company (CENX) trades at 5.

8x forward P/E versus 37. 9x for ATI Inc. — 32. 1x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for CENX: 25. 5% to $76. 00.

In this comparison, AMBP (11.

1% yield), KALU (1. 8% yield), AA (0. 6% yield) pay a dividend. ATI, CENX do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Ardagh Metal Packaging S.

A. (AMBP) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 81), 11. 1% yield). Century Aluminum Company (CENX) carries a higher beta of 1. 74 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (AMBP: -44. 4%, CENX: +794. 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.

These companies operate in different sectors (AMBP (Consumer Cyclical) and ATI (Industrials) and AA (Basic Materials) and CENX (Basic Materials) and KALU (Basic Materials)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: AMBP is a small-cap income-oriented stock; ATI is a mid-cap quality compounder stock; AA is a mid-cap deep-value stock; CENX is a small-cap quality compounder stock; KALU is a small-cap quality compounder stock. AMBP, AA, KALU pay a dividend while ATI, CENX do 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.