ALGM vs MPWR

For growth investors, Monolithic Power Systems, Inc.

(MPWR) is the stronger pick with 26. 4% revenue growth year-over-year, versus -30. 9% for Allegro MicroSystems, Inc. (ALGM). Monolithic Power Systems, Inc. (MPWR) offers the better valuation at 125. 6x trailing P/E (67. 2x forward), making it the more compelling value choice. Analysts rate Allegro MicroSystems, Inc. (ALGM) a "Buy" — based on 13 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 forward P/E, Monolithic Power Systems, Inc.

is actually cheaper at 67. 2x.

Over the past 5 years, Monolithic Power Systems, Inc.

(MPWR) delivered a total return of +404. 2%, compared to +104. 5% for Allegro MicroSystems, Inc. (ALGM). Over 10 years, the gap is even starker: MPWR returned +25. 3% versus ALGM's +176. 6%. 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), Monolithic Power Systems, Inc.

(MPWR) is the lower-risk stock at 2. 27β versus Allegro MicroSystems, Inc. 's 2. 39β — meaning ALGM is approximately 5% more volatile than MPWR relative to the S&P 500. On balance sheet safety, Monolithic Power Systems, Inc. (MPWR) 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), Monolithic Power Systems, Inc.

(MPWR) is pulling ahead at 26. 4% versus -30. 9% for Allegro MicroSystems, Inc. (ALGM). On earnings-per-share growth, the picture is similar: Monolithic Power Systems, Inc. grew EPS -65. 2% year-over-year, compared to -150. 0% for Allegro MicroSystems, Inc.. Over a 3-year CAGR, MPWR leads at 15. 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.

Monolithic Power Systems, Inc.

(MPWR) is the more profitable company, earning 22. 1% net margin versus -10. 1% for Allegro MicroSystems, Inc. — meaning it keeps 22. 1% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: MPWR leads at 26. 1% versus -2. 7% for ALGM. At the gross margin level — before operating expenses — MPWR leads at 55. 2%, 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, Monolithic Power Systems, Inc.

(MPWR) trades at 67. 2x forward P/E versus 92. 1x for Allegro MicroSystems, Inc. — 24. 9x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for ALGM: 7. 4% to $52. 57.

In this comparison, MPWR (0.

4% yield) pays a dividend. ALGM does not pay a meaningful dividend and should not be held primarily for 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 (+176. 6% 10Y return). Monolithic Power Systems, Inc. (MPWR) carries a higher beta of 2. 27 — 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: +176. 6%, MPWR: +25. 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 Technology sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: ALGM is a small-cap quality compounder stock; MPWR is a mid-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.