RPID vs DBVT vs IDXX vs ALKS vs NEOG

For growth investors, Rapid Micro Biosystems, Inc.

(RPID) is the stronger pick with 19. 7% revenue growth year-over-year, versus -5. 2% for Alkermes plc (ALKS). Alkermes plc (ALKS) offers the better valuation at 24. 5x trailing P/E, making it the more compelling value choice. Analysts rate Rapid Micro Biosystems, Inc. (RPID) a "Buy" — based on 4 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, Alkermes plc (ALKS) is the cheapest at 24.

5x versus IDEXX Laboratories, Inc. at 42. 8x. On forward P/E, Neogen Corporation is actually cheaper at 25. 3x — notably different from the trailing picture, reflecting expected earnings growth.

Over the past 5 years, Alkermes plc (ALKS) delivered a total return of +61.

7%, compared to -87. 7% for Rapid Micro Biosystems, Inc. (RPID). Over 10 years, the gap is even starker: IDXX returned +542. 3% versus RPID's -87. 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), Alkermes plc (ALKS) is the lower-risk stock at 1.

00β versus Rapid Micro Biosystems, Inc. 's 1. 91β — meaning RPID is approximately 92% more volatile than ALKS relative to the S&P 500. On balance sheet safety, Alkermes plc (ALKS) carries a lower debt/equity ratio of 4% versus 72% for Rapid Micro Biosystems, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Rapid Micro Biosystems, Inc.

(RPID) is pulling ahead at 19. 7% versus -5. 2% for Alkermes plc (ALKS). On earnings-per-share growth, the picture is similar: IDEXX Laboratories, Inc. grew EPS 22. 6% year-over-year, compared to -114. 6% for Neogen Corporation. Over a 3-year CAGR, RPID leads at 25. 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.

IDEXX Laboratories, Inc.

(IDXX) is the more profitable company, earning 24. 6% net margin versus -140. 3% for Rapid Micro Biosystems, Inc. — meaning it keeps 24. 6% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: IDXX leads at 31. 6% versus -141. 1% for RPID. At the gross margin level — before operating expenses — ALKS leads at 86. 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, Neogen Corporation (NEOG) trades at 25.

3x forward P/E versus 38. 3x for IDEXX Laboratories, Inc. — 13. 0x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for RPID: 204. 2% to $8. 00.

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, IDEXX Laboratories, Inc.

(IDXX) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (+542. 3% 10Y return). Rapid Micro Biosystems, Inc. (RPID) carries a higher beta of 1. 91 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (IDXX: +542. 3%, RPID: -87. 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: RPID is a small-cap high-growth stock; DBVT is a mega-cap quality compounder stock; IDXX is a mid-cap quality compounder stock; ALKS is a small-cap quality compounder stock; NEOG is a small-cap quality compounder 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.