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NASDAQ · MPWRTechnologySemiconductors

Monolithic Power Systems, Inc. (MPWR)

$1,261.08−5.06%
Close Nov 4, 2026 · split-adjusted
Nov 4, 2026$1269.58▲ 26.46% in range
Nov 3, 2025Low $856.96 · High $1689.89Nov 4, 2026
What changed · written from our data
As of Nov 4, 2026

Monolithic Power Systems closed at $1,261.08 on Nov 4, down 5.06%, 25.4% below its 52-week closing high. Volume of 1.2M shares was 1.35× its 20-day average (above normal).

Split-adjusted performance: -14.4% over one month, -23.7% over six months, +25.6% over one year.

In the quarter ended Sep 30, 2026, revenue was $1.20B, up 63.1% from a year earlier, with a net margin of 22.5%.

Short interest was 1.6M shares at the Oct 15 settlement, down 13.8% from the prior report (3.4% of float, 2.3 days to cover).

Market cap$61.53B48.8M shares
Revenue · quarter$1.20B+63.1% YoY
Diluted EPS$5.51+47.3% YoY
P/E · TTM68.6×P/S 16.5×
Net margin22.5%Gross 55.4%
Dividend yield0.63%$2 last paid
52-week range856.96 – 1689.89−25.4% from high
Volume1.2M1.35× 20-day avg
Volatility · 60d52.7%Annualised
Short % of float3.4%2.3 days to cover
Net cash$1.09BCash $1.09B
Next earnings—Not scheduled
Split-adjusted performance
1W +4.1%1M −14.4%3M −7.2%6M −23.7%YTD +39.1%1Y +25.6%3Y +212.1%5Y +140.2%

Earnings reactions

History →

No reported quarters with price history yet.

Rank within Semiconductors

Percentile among 83 companies (100 = best)

6-month momentum62
Revenue growth78
Net margin79
Value (low P/E)33
Size88

Industry medians: 6-month return −31.2%, revenue growth +24.6%, net margin 8.1%, P/E 46.8×.

Short interest

Details →
Shares short1.6M−13.8% vs prior
Days to cover2.3Settled Oct 15
% of float3.4%
Short vol. 10d38.5%of daily volume

Closest peers by size in Semiconductors

CompanyPriceToday6MRev. growthNet marginP/EMkt cap
MPWRMonolithic Power Systems$1,261.08−5.06%−23.7%+63.1%22.5%68.6$61.53B
NXPINXP Semiconductors$265.01+0.84%−12.7%+19.3%23.3%20.7$66.80BCompare
MCHPMicrochip Technology$75.34−3.29%−26.8%+38.0%13.6%111.4$40.91BCompare
ALABAstera Labs$223.27−4.43%+4.4%+104.5%39.0%104.8$38.73BCompare
ONON Semiconductor$71.24−1.87%−32.6%+11.1%18.2%40.2$27.74BCompare
MRVLMarvell Technology$159.80−7.08%−7.2%+36.5%11.2%54.4$143.61BCompare
CRDOCredo Technology Group Holding$136.50−9.55%−31.2%+114.7%27.0%47.7$25.66BCompare
QQnity Electronics$118.78−0.09%−20.5%—8.7%—$24.85BCompare
HUBBHubbell Incorporated$438.26−2.45%−12.8%+24.6%14.0%25.5$23.16BCompare

News about Monolithic Power Systems

All news →
MPWR Q3 Earnings Beat on AI Infrastructure and Communications DemandZacks Investment Research · 1d ago▲ PositiveMPWR Q3 Earnings Call Highlights AI Demand and Capacity ExpansionZacks Investment Research · 5d ago▲ PositiveMPWR Q3 Earnings Surpass Estimates on Enterprise Data StrengthZacks Investment Research · 5d ago▲ PositiveMonolithic Power Investor News: Rosen Law Firm Announces Investigation of Breaches of Fiduciary Duties by the Directors and Officers of Monolithic Power Systems, Inc. – MPWRGlobeNewswire Inc. · 6d ago▼ NegativeCan Healthy Top-Line Growth Benefit Monolithic Power's Q3 Earnings?Zacks Investment Research · Oct 26, 2026▲ Positive

Quick answers

What does Monolithic Power Systems do?
Monolithic Power Systems is a power chipmaker specializing in voltage regulators. Its mission is to reduce total energy consumption in end systems to improve performance and save customers cost.
What is MPWR's market cap?
$61.53B, based on the Nov 4 close of $1,261.08.
What is MPWR's P/E ratio?
68.6× trailing-twelve-month earnings of $897.28M.
Does Monolithic Power Systems pay a dividend?
Yes. The latest regular dividend was $2 per share (ex-date Sep 30), an annualised yield of 0.63%.
How much of MPWR is sold short?
1.6M shares, 3.4% of float, as of Oct 15, 2026.
What sector is MPWR in?
Technology, in the Semiconductors industry.

About Monolithic Power Systems

Monolithic Power Systems is a power chipmaker specializing in voltage regulators. Its mission is to reduce total energy consumption in end systems to improve performance and save customers cost. It serves the data center, automotive, industrial, communications, and consumer end markets. MPS uses a fabless manufacturing model, partnering with third-party chip foundries to host its proprietary BCD process technology.

HQ: West Palm Beach, FL4,501 employeesListed Nov 19, 2004monolithicpower.com

Sources: Massive / Polygon daily aggregates (split-adjusted) · SEC filings via Massive · FINRA settlements via Massive · Financial Modeling Prep. Figures are dated where shown; research is informational, not investment advice. Methodology