ARX vs RNR vs KNSL vs ACGL vs MMC

For growth investors, Kinsale Capital Group, Inc.

(KNSL) is the stronger pick with 18. 0% revenue growth year-over-year, versus -11. 6% for Accelerant Holdings (ARX). RenaissanceRe Holdings Ltd. (RNR) offers the better valuation at 5. 2x trailing P/E (7. 4x forward), making it the more compelling value choice. Analysts rate Accelerant Holdings (ARX) a "Buy" — based on 9 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, RenaissanceRe Holdings Ltd.

(RNR) is the cheapest at 5. 2x versus Marsh & McLennan Companies, Inc. at 21. 3x. On forward P/E, RenaissanceRe Holdings Ltd. is actually cheaper at 7. 4x. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: RenaissanceRe Holdings Ltd. wins at 0. 25x versus Marsh & McLennan Companies, Inc. 's 0. 88x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, Arch Capital Group Ltd.

(ACGL) delivered a total return of +153. 8%, compared to -49. 1% for Accelerant Holdings (ARX). Over 10 years, the gap is even starker: KNSL returned +1576% versus ARX's -49. 1%. 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), RenaissanceRe Holdings Ltd.

(RNR) is the lower-risk stock at -0. 05β versus Accelerant Holdings's 0. 38β — meaning ARX is approximately -849% more volatile than RNR relative to the S&P 500. On balance sheet safety, Arch Capital Group Ltd. (ACGL) carries a lower debt/equity ratio of 11% versus 162% for Marsh & McLennan Companies, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Kinsale Capital Group, Inc.

(KNSL) is pulling ahead at 18. 0% versus -11. 6% for Accelerant Holdings (ARX). On earnings-per-share growth, the picture is similar: RenaissanceRe Holdings Ltd. grew EPS 60. 8% year-over-year, compared to -54. 5% for Accelerant Holdings. Over a 3-year CAGR, RNR leads at 36. 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.

Kinsale Capital Group, Inc.

(KNSL) is the more profitable company, earning 26. 9% net margin versus -275. 8% for Accelerant Holdings — meaning it keeps 26. 9% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: KNSL leads at 33. 8% versus -255. 8% for ARX. At the gross margin level — before operating expenses — ARX leads at 60. 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, RenaissanceRe Holdings Ltd. (RNR) is the more undervalued stock at a PEG of 0. 25x versus Marsh & McLennan Companies, Inc. 's 0. 88x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, RenaissanceRe Holdings Ltd. (RNR) trades at 7. 4x forward P/E versus 19. 8x for Accelerant Holdings — 12. 4x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for KNSL: 42. 8% to $433. 00.

In this comparison, MMC (1.

8% yield), RNR (0. 6% yield), KNSL (0. 2% yield) pay a dividend. ARX, ACGL do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Kinsale Capital Group, Inc.

(KNSL) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 25), +1576% 10Y return). Both have compounded well over 10 years (KNSL: +1576%, ARX: -49. 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 Financial Services sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: ARX is a small-cap quality compounder stock; RNR is a mid-cap deep-value stock; KNSL is a small-cap high-growth stock; ACGL is a mid-cap deep-value stock; MMC is a mid-cap quality compounder stock. RNR, MMC pay a dividend while ARX, KNSL, ACGL 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.