Monolithic Power Systems (MPWR) Stock Analysis & Winston Score

Monolithic Power Systems, Inc. engages in the design, development, marketing, and sale of semiconductor-based power electronics solutions for the computing and storage, automotive, industrial, communications, and consumer markets. The company provides direct current (DC) to DC integrated circuits (ICs) that are used to convert and control voltages of various electronic systems, such as portable electronic devices, wireless LAN access points, computers and notebooks, monitors, infotainment applic

Winston Score History

Politician Trades

14 trades / 12mo

11 Congressional buys and 3 sells on MPWR in the last 12 months.

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Growth Profile

For growth stock investors

When traditional metrics don't capture the full picture, these are the signals growth stock investors use instead.

Revenue Growth

+26.1% YoY

YoY Growth Rate

Strong revenue growth

EPS Growth

+40.7% YoY

YoY Growth Rate

Strong earnings growth

R&D Spend

$382M/ year

↑ Rising (+18% vs prior year)

13.7% of revenue

In line with sector average (15%)

Investing heavily in future products and technology

Insider Activity

3.7%ownership

→ Flat

Insiders holding steady — not selling despite ability to

Cash Position

Cash flow positive

$1.1B cash & investments

Quarterly Free Cash Flow

↓ Burn rate worsening

Company generates more cash than it spends — no dilution risk from fundraising

Strong grower

Monolithic Power Systems is growing revenue at 26% year-over-year. The Winston Score penalises unprofitable companies, but revenue at this pace tells a different story — this is a company still in "build mode."

The Winston Score above measures business quality today. Growth stocks often score lower because they invest in the future rather than maximising current profits. These metrics show what matters most for evaluating that future.

Share count broadly stable

+0.9% over 4y

The share count has stayed roughly flat over this period — little dilution or buyback activity.

Diluted shares outstanding: 47.9M (2021) → 48.3M (2025)

Score breakdown

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Quality

Gross Margin

55.3%

Premium pricing power — 55.3% gross margin

Operating Margin

30.0%

Excellent — 30.0% operating margin

ROCE

6.6%

Weak — 6.6% return on capital

ROIC between 5% and 15%. They earn 5 to 15 cents back per year on every dollar invested.

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Growth

Sales YoY

+23.9%

Fast-growing sales (23.9% YoY)

EPS YoY

-63.1%

Earnings shrinking (-63.1% YoY)

Earnings per share down more than 10%. Either a bad year, or a real decline.

EPS Consistency

6/8 quarters

Earnings grew in most of the last 8 quarters

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Cash Flow

Cash Conversion

124%

Turns 124% of profit into real cash

FCF Margin

22.5%

Converts sales into free cash efficiently (22.5%)

Free cash flow margin above 20%. Out of every $100 in sales, more than $20 is real cash they keep.

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Stability

Debt / Equity

N/A

Data not available

Interest Cover

100.00x

—

Comfortably covers interest (100.0x)

Interest coverage above 8. Profits cover interest many times over.

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Valuation

P/E Ratio (TTM)

94.0x

Expensive — P/E 94.0

P/E over 35. The market is pricing in heavy, sustained growth.

P/E vs Forward

+57.2

GROWING

Earnings expected to grow meaningfully — cheaper on forward P/E (94.0 → 36.8)

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Dividends

Dividend Yield

0.55%

Small dividend — 0.55% yield

Modest yield. The bulk of any return needs to come from price appreciation.

Dividend Growth

+26.7%

Dividend growing fast (26.7% YoY)

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