SOLS vs MTRN vs MP vs KALU

For growth investors, MP Materials Corp.

(MP) is the stronger pick with 35. 1% revenue growth year-over-year, versus 3. 1% for Solstice Advanced Materials Inc. (SOLS). Kaiser Aluminum Corporation (KALU) offers the better valuation at 26. 1x trailing P/E (17. 2x forward), making it the more compelling value choice. Analysts rate Solstice Advanced Materials Inc. (SOLS) a "Buy" — based on 4 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, Kaiser Aluminum Corporation (KALU) is the cheapest at 26.

1x versus Solstice Advanced Materials Inc. at 58. 6x. On forward P/E, Kaiser Aluminum Corporation is actually cheaper at 17. 2x. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Kaiser Aluminum Corporation wins at 0. 57x versus Materion Corporation's 0. 87x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, Materion Corporation (MTRN) delivered a total return of +172.

3%, compared to +44. 5% for Kaiser Aluminum Corporation (KALU). Over 10 years, the gap is even starker: MTRN returned +775. 8% versus SOLS's +80. 5%. 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), Solstice Advanced Materials Inc.

(SOLS) is the lower-risk stock at 1. 43β versus Kaiser Aluminum Corporation's 1. 72β — meaning KALU is approximately 20% more volatile than SOLS relative to the S&P 500. On balance sheet safety, MP Materials Corp. (MP) carries a lower debt/equity ratio of 44% versus 176% for Solstice Advanced Materials Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), MP Materials Corp.

(MP) is pulling ahead at 35. 1% versus 3. 1% for Solstice Advanced Materials Inc. (SOLS). On earnings-per-share growth, the picture is similar: Materion Corporation grew EPS 1179% year-over-year, compared to -44. 0% for Solstice Advanced Materials Inc.. Over a 3-year CAGR, MTRN leads at 0. 6% 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.

Solstice Advanced Materials Inc.

(SOLS) is the more profitable company, earning 6. 1% net margin versus -31. 2% for MP Materials Corp. — meaning it keeps 6. 1% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: SOLS leads at 18. 8% versus -44. 6% for MP. At the gross margin level — before operating expenses — SOLS leads at 32. 2%, 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, Kaiser Aluminum Corporation (KALU) is the more undervalued stock at a PEG of 0. 57x versus Materion Corporation's 0. 87x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, Kaiser Aluminum Corporation (KALU) trades at 17. 2x forward P/E versus 247. 2x for MP Materials Corp. — 230. 0x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for MP: 23. 5% to $81. 00.

In this comparison, KALU (1.

8% yield), MTRN (0. 3% yield) pay a dividend. SOLS, MP do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, MP Materials Corp.

(MP) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (+555. 9% 10Y return). Both have compounded well over 10 years (MP: +555. 9%, SOLS: +80. 5%), 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: SOLS is a mid-cap quality compounder stock; MTRN is a small-cap quality compounder stock; MP is a mid-cap high-growth stock; KALU is a small-cap quality compounder stock. KALU pays a dividend while SOLS, MTRN, MP 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.