AMBA vs ALGM

For growth investors, Ambarella, Inc.

(AMBA) is the stronger pick with 25. 8% revenue growth year-over-year, versus -30. 9% for Allegro MicroSystems, Inc. (ALGM). Analysts rate Ambarella, Inc. (AMBA) a "Buy" — based on 36 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, Allegro MicroSystems, Inc.

(ALGM) delivered a total return of +106. 7%, compared to -16. 7% for Ambarella, Inc. (AMBA). Over 10 years, the gap is even starker: ALGM returned +190. 2% versus AMBA's +97. 2%. 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), Allegro MicroSystems, Inc.

(ALGM) is the lower-risk stock at 2. 43β versus Ambarella, Inc. 's 2. 53β — meaning AMBA is approximately 4% more volatile than ALGM relative to the S&P 500. On balance sheet safety, Ambarella, Inc. (AMBA) carries a lower debt/equity ratio of 1% versus 40% for Allegro MicroSystems, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Ambarella, Inc.

(AMBA) is pulling ahead at 25. 8% versus -30. 9% for Allegro MicroSystems, Inc. (ALGM). On earnings-per-share growth, the picture is similar: Ambarella, Inc. grew EPS 33. 2% year-over-year, compared to -150. 0% for Allegro MicroSystems, Inc.. Over a 3-year CAGR, ALGM leads at -1. 9% 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.

Allegro MicroSystems, Inc.

(ALGM) is the more profitable company, earning -10. 1% net margin versus -41. 1% for Ambarella, Inc. — meaning it keeps -10. 1% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ALGM leads at -2. 7% versus -44. 4% for AMBA. At the gross margin level — before operating expenses — AMBA leads at 60. 5%, 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, Allegro MicroSystems, Inc.

(ALGM) trades at 96. 7x forward P/E versus 96. 9x for Ambarella, Inc. — 0. 3x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for AMBA: 30. 3% to $98. 33.

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, Allegro MicroSystems, Inc.

(ALGM) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (+190. 2% 10Y return). Ambarella, Inc. (AMBA) carries a higher beta of 2. 53 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (ALGM: +190. 2%, AMBA: +97. 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 Technology sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: AMBA is a small-cap high-growth stock; ALGM 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.