SI vs ATEC

For growth investors, SHOULDER INNOVATIONS, INC.

(SI) is the stronger pick with 64. 1% revenue growth year-over-year, versus 25. 0% for Alphatec Holdings, Inc. (ATEC). Analysts rate SHOULDER INNOVATIONS, INC. (SI) a "Buy" — based on 3 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.

Over the past 5 years, SHOULDER INNOVATIONS, INC.

(SI) delivered a total return of -14. 4%, compared to -54. 3% for Alphatec Holdings, Inc. (ATEC). Over 10 years, the gap is even starker: ATEC returned +172. 8% versus SI's -14. 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), SHOULDER INNOVATIONS, INC.

(SI) is the lower-risk stock at 0. 76β versus Alphatec Holdings, Inc. 's 1. 13β — meaning ATEC is approximately 47% more volatile than SI relative to the S&P 500.

By revenue growth (latest reported year), SHOULDER INNOVATIONS, INC.

(SI) is pulling ahead at 64. 1% versus 25. 0% for Alphatec Holdings, Inc. (ATEC). On earnings-per-share growth, the picture is similar: Alphatec Holdings, Inc. grew EPS 15. 0% year-over-year, compared to -22. 2% for SHOULDER INNOVATIONS, INC.. 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.

Alphatec Holdings, Inc.

(ATEC) is the more profitable company, earning -18. 8% net margin versus -49. 4% for SHOULDER INNOVATIONS, INC. — meaning it keeps -18. 8% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ATEC leads at -10. 7% versus -46. 3% for SI. At the gross margin level — before operating expenses — SI leads at 77. 0%, 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.

Analyst consensus price targets imply the most upside for ATEC: 257.

7% to $25. 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, SHOULDER INNOVATIONS, INC.

(SI) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 76)). Both have compounded well over 10 years (SI: -14. 4%, ATEC: +172. 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.

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.