SIMO vs MPWR

For growth investors, Monolithic Power Systems, Inc.

(MPWR) is the stronger pick with 26. 4% revenue growth year-over-year, versus 10. 2% for Silicon Motion Technology Corporation (SIMO). Silicon Motion Technology Corporation (SIMO) offers the better valuation at 17. 4x trailing P/E (30. 0x forward), making it the more compelling value choice. Analysts rate Silicon Motion Technology Corporation (SIMO) a "Buy" — based on 31 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, Silicon Motion Technology Corporation (SIMO) is the cheapest at 17.

4x versus Monolithic Power Systems, Inc. at 125. 6x. On forward P/E, Silicon Motion Technology Corporation is actually cheaper at 30. 0x. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Silicon Motion Technology Corporation wins at 0. 67x versus Monolithic Power Systems, Inc. 's 2. 28x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

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

(MPWR) delivered a total return of +404. 2%, compared to +287. 3% for Silicon Motion Technology Corporation (SIMO). Over 10 years, the gap is even starker: MPWR returned +25. 3% versus SIMO's +560. 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), Silicon Motion Technology Corporation (SIMO) is the lower-risk stock at 1.

92β versus Monolithic Power Systems, Inc. 's 2. 27β — meaning MPWR is approximately 19% more volatile than SIMO relative to the S&P 500.

By revenue growth (latest reported year), Monolithic Power Systems, Inc.

(MPWR) is pulling ahead at 26. 4% versus 10. 2% for Silicon Motion Technology Corporation (SIMO). On earnings-per-share growth, the picture is similar: Silicon Motion Technology Corporation grew EPS 38. 3% year-over-year, compared to -65. 2% for Monolithic Power Systems, 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 13. 9% for Silicon Motion Technology Corporation — 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 10. 5% for SIMO. 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.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, Silicon Motion Technology Corporation (SIMO) is the more undervalued stock at a PEG of 0. 67x versus Monolithic Power Systems, Inc. 's 2. 28x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, Silicon Motion Technology Corporation (SIMO) trades at 30. 0x forward P/E versus 67. 2x for Monolithic Power Systems, Inc. — 37. 3x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for MPWR: 0. 9% to $1615. 00.

All stocks in this comparison pay dividends.

Silicon Motion Technology Corporation (SIMO) offers the highest yield at 3. 2%, versus 0. 4% for Monolithic Power Systems, Inc. (MPWR).

For long-horizon retirement investors, Silicon Motion Technology Corporation (SIMO) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (3.

2% yield, +560. 7% 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 (SIMO: +560. 7%, 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: SIMO is a small-cap deep-value stock; MPWR is a mid-cap high-growth stock. SIMO pays a dividend while MPWR does not, making them suitable for different income and tax situations. 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.