HAYW vs PEN vs ISRG vs POOL

For growth investors, Intuitive Surgical, Inc.

(ISRG) is the stronger pick with 20. 5% revenue growth year-over-year, versus -0. 4% for Pool Corporation (POOL). Pool Corporation (POOL) offers the better valuation at 17. 6x trailing P/E (17. 2x forward), making it the more compelling value choice. Analysts rate Intuitive Surgical, Inc. (ISRG) a "Buy" — based on 55 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, Pool Corporation (POOL) is the cheapest at 17.

6x versus Penumbra, Inc. at 71. 8x. On forward P/E, Hayward Holdings, Inc. is actually cheaper at 17. 2x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Hayward Holdings, Inc. wins at 0. 12x versus Pool Corporation's 4. 44x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, Intuitive Surgical, Inc.

(ISRG) delivered a total return of +58. 7%, compared to -52. 3% for Pool Corporation (POOL). Over 10 years, the gap is even starker: ISRG returned +554. 2% versus HAYW's -13. 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), Penumbra, Inc.

(PEN) is the lower-risk stock at 0. 25β versus Hayward Holdings, Inc. 's 1. 14β — meaning HAYW is approximately 358% more volatile than PEN relative to the S&P 500. On balance sheet safety, Hayward Holdings, Inc. (HAYW) carries a lower debt/equity ratio of 1% versus 29% for Pool Corporation — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Intuitive Surgical, Inc.

(ISRG) is pulling ahead at 20. 5% versus -0. 4% for Pool Corporation (POOL). On earnings-per-share growth, the picture is similar: Penumbra, Inc. grew EPS 1156% year-over-year, compared to -4. 0% for Pool Corporation. Over a 3-year CAGR, PEN leads at 18. 3% 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.

Intuitive Surgical, Inc.

(ISRG) is the more profitable company, earning 28. 4% net margin versus 7. 7% for Pool Corporation — meaning it keeps 28. 4% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ISRG leads at 29. 3% versus 11. 0% for POOL. At the gross margin level — before operating expenses — PEN leads at 67. 1%, 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, Hayward Holdings, Inc. (HAYW) is the more undervalued stock at a PEG of 0. 12x versus Pool Corporation's 4. 44x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, Hayward Holdings, Inc. (HAYW) trades at 17. 2x forward P/E versus 65. 2x for Penumbra, Inc. — 48. 0x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for POOL: 46. 7% to $279. 29.

In this comparison, POOL (2.

6% yield) pays a dividend. HAYW, PEN, ISRG do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Penumbra, Inc.

(PEN) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 25), +505. 9% 10Y return). Both have compounded well over 10 years (PEN: +505. 9%, HAYW: -13. 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.

These companies operate in different sectors (HAYW (Industrials) and PEN (Healthcare) and ISRG (Healthcare) and POOL (Industrials)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: HAYW is a small-cap quality compounder stock; PEN is a mid-cap high-growth stock; ISRG is a mid-cap high-growth stock; POOL is a small-cap deep-value stock. POOL pays a dividend while HAYW, PEN, ISRG 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.