AORT vs TMDX

For growth investors, TransMedics Group, Inc.

(TMDX) is the stronger pick with 37. 1% revenue growth year-over-year, versus 13. 6% for Artivion, Inc. (AORT). TransMedics Group, Inc. (TMDX) offers the better valuation at 13. 9x trailing P/E (31. 5x forward), making it the more compelling value choice. Analysts rate Artivion, Inc. (AORT) a "Buy" — based on 12 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, TransMedics Group, Inc.

(TMDX) is the cheapest at 13. 9x versus Artivion, Inc. at 121. 0x. On forward P/E, TransMedics Group, Inc. is actually cheaper at 31. 5x.

Over the past 5 years, TransMedics Group, Inc.

(TMDX) delivered a total return of +193. 1%, compared to -13. 9% for Artivion, Inc. (AORT). Over 10 years, the gap is even starker: TMDX returned +203. 2% versus AORT's +107. 4%. 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), Artivion, Inc.

(AORT) is the lower-risk stock at 0. 57β versus TransMedics Group, Inc. 's 1. 40β — meaning TMDX is approximately 144% more volatile than AORT relative to the S&P 500. On balance sheet safety, Artivion, Inc. (AORT) carries a lower debt/equity ratio of 65% versus 99% for TransMedics Group, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), TransMedics Group, Inc.

(TMDX) is pulling ahead at 37. 1% versus 13. 6% for Artivion, Inc. (AORT). On earnings-per-share growth, the picture is similar: TransMedics Group, Inc. grew EPS 382. 2% year-over-year, compared to 165. 6% for Artivion, Inc.. Over a 3-year CAGR, TMDX leads at 86. 4% 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.

TransMedics Group, Inc.

(TMDX) is the more profitable company, earning 31. 4% net margin versus 2. 2% for Artivion, Inc. — meaning it keeps 31. 4% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: TMDX leads at 17. 9% versus 6. 1% for AORT. At the gross margin level — before operating expenses — AORT leads at 61. 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, TransMedics Group, Inc.

(TMDX) trades at 31. 5x forward P/E versus 75. 3x for Artivion, Inc. — 43. 8x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for AORT: 108. 6% to $53. 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, Artivion, Inc.

(AORT) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 57), +107. 4% 10Y return). Both have compounded well over 10 years (AORT: +107. 4%, TMDX: +203. 2%), 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: AORT is a small-cap quality compounder stock; TMDX 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.