AMRN vs ELAN vs ACAD vs SUPN vs HRMY

For growth investors, Harmony Biosciences Holdings, Inc.

(HRMY) is the stronger pick with 21. 5% revenue growth year-over-year, versus -6. 5% for Amarin Corporation plc (AMRN). ACADIA Pharmaceuticals Inc. (ACAD) offers the better valuation at 9. 9x trailing P/E (50. 9x forward), making it the more compelling value choice. Analysts rate Elanco Animal Health Incorporated (ELAN) a "Buy" — based on 20 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, ACADIA Pharmaceuticals Inc.

(ACAD) is the cheapest at 9. 9x versus Harmony Biosciences Holdings, Inc. at 11. 6x. On forward P/E, Harmony Biosciences Holdings, Inc. is actually cheaper at 9. 0x — notably different from the trailing picture, reflecting expected earnings growth.

Over the past 5 years, Supernus Pharmaceuticals, Inc.

(SUPN) delivered a total return of +78. 0%, compared to -83. 9% for Amarin Corporation plc (AMRN). Over 10 years, the gap is even starker: SUPN returned +228. 4% versus AMRN's -54. 5%. 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), Supernus Pharmaceuticals, Inc.

(SUPN) is the lower-risk stock at 0. 78β versus Elanco Animal Health Incorporated's 1. 42β — meaning ELAN is approximately 81% more volatile than SUPN relative to the S&P 500. On balance sheet safety, Amarin Corporation plc (AMRN) carries a lower debt/equity ratio of 3% versus 61% for Elanco Animal Health Incorporated — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Harmony Biosciences Holdings, Inc.

(HRMY) is pulling ahead at 21. 5% versus -6. 5% for Amarin Corporation plc (AMRN). On earnings-per-share growth, the picture is similar: ACADIA Pharmaceuticals Inc. grew EPS 68. 4% year-over-year, compared to -169. 1% for Elanco Animal Health Incorporated. Over a 3-year CAGR, ACAD leads at 27. 5% 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.

ACADIA Pharmaceuticals Inc.

(ACAD) is the more profitable company, earning 36. 5% net margin versus -18. 2% for Amarin Corporation plc — meaning it keeps 36. 5% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: HRMY leads at 24. 0% versus -6. 5% for AMRN. At the gross margin level — before operating expenses — ACAD leads at 91. 7%, 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, Harmony Biosciences Holdings, Inc.

(HRMY) trades at 9. 0x forward P/E versus 50. 9x for ACADIA Pharmaceuticals Inc. — 42. 0x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for ACAD: 54. 1% to $34. 78.

None of the stocks in this comparison currently pay a material dividend.

All are effectively zero-yield and should be held for capital appreciation rather than income.

For long-horizon retirement investors, Supernus Pharmaceuticals, Inc.

(SUPN) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 78), +228. 4% 10Y return). Both have compounded well over 10 years (SUPN: +228. 4%, ELAN: -33. 3%), 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: AMRN is a small-cap quality compounder stock; ELAN is a mid-cap quality compounder stock; ACAD is a small-cap deep-value stock; SUPN is a small-cap quality compounder stock; HRMY is a small-cap high-growth 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.