PEN vs INVA vs ISRG vs PRGO

For growth investors, Intuitive Surgical, Inc.

(ISRG) is the stronger pick with 20. 5% revenue growth year-over-year, versus -2. 8% for Perrigo Company plc (PRGO). Innoviva, Inc. (INVA) offers the better valuation at 6. 9x trailing P/E (11. 9x forward), making it the more compelling value choice. Analysts rate Innoviva, Inc. (INVA) a "Buy" — based on 10 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, Innoviva, Inc.

(INVA) is the cheapest at 6. 9x versus Penumbra, Inc. at 71. 8x. On forward P/E, Perrigo Company plc is actually cheaper at 5. 6x — 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: Innoviva, Inc. wins at 1. 15x versus Intuitive Surgical, Inc. 's 2. 01x — a reasonable growth-adjusted valuation.

Over the past 5 years, Innoviva, Inc.

(INVA) delivered a total return of +94. 4%, compared to -60. 1% for Perrigo Company plc (PRGO). Over 10 years, the gap is even starker: ISRG returned +554. 2% versus PRGO's -77. 7%. 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), Innoviva, Inc.

(INVA) is the lower-risk stock at 0. 13β versus Perrigo Company plc's 1. 18β — meaning PRGO is approximately 837% more volatile than INVA relative to the S&P 500. On balance sheet safety, Intuitive Surgical, Inc. (ISRG) carries a lower debt/equity ratio of 2% versus 135% for Perrigo Company plc — 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 -2. 8% for Perrigo Company plc (PRGO). On earnings-per-share growth, the picture is similar: Penumbra, Inc. grew EPS 1156% year-over-year, compared to -723. 2% for Perrigo Company plc. 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.

Innoviva, Inc.

(INVA) is the more profitable company, earning 63. 8% net margin versus -33. 5% for Perrigo Company plc — meaning it keeps 63. 8% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: INVA leads at 38. 5% versus 8. 1% for PRGO. At the gross margin level — before operating expenses — INVA leads at 72. 3%, 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, Innoviva, Inc. (INVA) is the more undervalued stock at a PEG of 1. 15x versus Intuitive Surgical, Inc. 's 2. 01x. A PEG below 1. 5 suggests fair-to-attractive pricing relative to expected growth. On forward earnings alone, Perrigo Company plc (PRGO) trades at 5. 6x forward P/E versus 65. 2x for Penumbra, Inc. — 59. 6x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for PRGO: 70. 6% to $20. 00.

In this comparison, PRGO (9.

8% yield) pays a dividend. PEN, INVA, 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. 23), +501. 4% 10Y return). Both have compounded well over 10 years (PEN: +501. 4%, PRGO: -77. 7%), 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 Healthcare sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: PEN is a mid-cap high-growth stock; INVA is a small-cap high-growth stock; ISRG is a mid-cap high-growth stock; PRGO is a small-cap income-oriented stock. PRGO pays a dividend while PEN, INVA, 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.