CBT vs KRO vs TROX vs IOSP vs RPM

For growth investors, RPM International Inc.

(RPM) is the stronger pick with 0. 5% revenue growth year-over-year, versus -7. 0% for Cabot Corporation (CBT). Cabot Corporation (CBT) offers the better valuation at 13. 5x trailing P/E (13. 0x forward), making it the more compelling value choice. Analysts rate Cabot Corporation (CBT) a "Buy" — based on 15 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, Cabot Corporation (CBT) is the cheapest at 13.

5x versus RPM International Inc. at 19. 0x. On forward P/E, Cabot Corporation is actually cheaper at 13. 0x. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Innospec Inc. wins at 0. 48x versus RPM International Inc. 's 1. 03x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, Cabot Corporation (CBT) delivered a total return of +43.

2%, compared to -55. 1% for Tronox Holdings plc (TROX). Over 10 years, the gap is even starker: RPM returned +134. 7% versus IOSP's +84. 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), Innospec Inc.

(IOSP) is the lower-risk stock at 0. 70β versus Tronox Holdings plc's 2. 37β — meaning TROX is approximately 239% more volatile than IOSP relative to the S&P 500. On balance sheet safety, Innospec Inc. (IOSP) carries a lower debt/equity ratio of 7% versus 2% for Tronox Holdings plc — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), RPM International Inc.

(RPM) is pulling ahead at 0. 5% versus -7. 0% for Cabot Corporation (CBT). On earnings-per-share growth, the picture is similar: Innospec Inc. grew EPS 228. 9% year-over-year, compared to -890. 0% for Tronox Holdings plc. Over a 3-year CAGR, RPM leads at 3. 2% 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.

RPM International Inc.

(RPM) is the more profitable company, earning 9. 3% net margin versus -16. 2% for Tronox Holdings plc — meaning it keeps 9. 3% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: CBT leads at 16. 7% versus -1. 7% for KRO. At the gross margin level — before operating expenses — RPM leads at 41. 4%, 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, Innospec Inc. (IOSP) is the more undervalued stock at a PEG of 0. 48x versus RPM International Inc. 's 1. 03x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, Cabot Corporation (CBT) trades at 13. 0x forward P/E versus 18. 5x for RPM International Inc. — 5. 4x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for IOSP: 50. 1% to $115. 00.

All stocks in this comparison pay dividends.

Tronox Holdings plc (TROX) offers the highest yield at 3. 6%, versus 2. 0% for RPM International Inc. (RPM).

For long-horizon retirement investors, Innospec Inc.

(IOSP) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 70), 2. 2% yield). Tronox Holdings plc (TROX) carries a higher beta of 2. 37 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (IOSP: +84. 4%, TROX: +116. 1%), 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: CBT is a small-cap deep-value stock; KRO is a small-cap quality compounder stock; TROX is a small-cap income-oriented stock; IOSP is a small-cap deep-value stock; RPM is a mid-cap quality compounder stock. 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.