ACHV vs CHRS vs PTGX vs PRGO

For growth investors, Perrigo Company plc (PRGO) is the stronger pick with -2.

8% revenue growth year-over-year, versus -89. 4% for Protagonist Therapeutics, Inc. (PTGX). Coherus Oncology, Inc. (CHRS) offers the better valuation at 1. 2x trailing P/E, making it the more compelling value choice. Analysts rate Achieve Life Sciences, Inc. (ACHV) a "Buy" — based on 6 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 forward P/E, Perrigo Company plc is actually cheaper at 5.

6x — notably different from the trailing picture, reflecting expected earnings growth.

Over the past 5 years, Protagonist Therapeutics, Inc.

(PTGX) delivered a total return of +238. 8%, compared to -87. 7% for Coherus Oncology, Inc. (CHRS). Over 10 years, the gap is even starker: PTGX returned +744. 9% versus ACHV's -99. 8%. 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), Protagonist Therapeutics, Inc.

(PTGX) is the lower-risk stock at 0. 25β versus Coherus Oncology, Inc. 's 2. 29β — meaning CHRS is approximately 814% more volatile than PTGX relative to the S&P 500. On balance sheet safety, Protagonist Therapeutics, Inc. (PTGX) 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), Perrigo Company plc (PRGO) is pulling ahead at -2.

8% versus -89. 4% for Protagonist Therapeutics, Inc. (PTGX). On earnings-per-share growth, the picture is similar: Coherus Oncology, Inc. grew EPS 472. 0% year-over-year, compared to -723. 2% for Perrigo Company plc. Over a 3-year CAGR, PTGX leads at 20. 1% 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.

Coherus Oncology, Inc.

(CHRS) is the more profitable company, earning 398. 4% net margin versus -282. 8% for Protagonist Therapeutics, Inc. — meaning it keeps 398. 4% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: PRGO leads at 8. 1% versus -429. 5% for CHRS. At the gross margin level — before operating expenses — PTGX leads at 97. 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.

On forward earnings alone, Perrigo Company plc (PRGO) trades at 5.

6x forward P/E versus 30. 6x for Protagonist Therapeutics, Inc. — 25. 0x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for CHRS: 242. 0% to $6. 02.

In this comparison, PRGO (9.

8% yield) pays a dividend. ACHV, CHRS, PTGX do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Protagonist Therapeutics, Inc.

(PTGX) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 25), +744. 9% 10Y return). Achieve Life Sciences, Inc. (ACHV) carries a higher beta of 2. 14 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (PTGX: +744. 9%, ACHV: -99. 8%), 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: ACHV is a small-cap quality compounder stock; CHRS is a small-cap deep-value stock; PTGX is a small-cap quality compounder stock; PRGO is a small-cap income-oriented stock. PRGO pays a dividend while ACHV, CHRS, PTGX 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.