moneyheap
MPWR · Analysis updated Nov 10, 2026, 6:00 PM ET
Why is Monolithic Power Systems, Inc. (MPWR) stock moving?
MPWR has rallied about 16% over the last month, from $1,167.93 on Oct 22 to $1,357.60 on Nov 10, after a strong Q3 report on Oct 29. Adjusted EPS of $8.19 beat estimates near $7.75-$7.79, and sales of $1.202B beat the $1.145B estimate. Q4 sales guidance of $1.315B-$1.385B sits well above the $1.201B consensus, which is the most concrete fundamental driver in the news. Analysts followed with upgrades and higher targets: Rosenblatt moved to Buy, Truist raised its target to $1,906, and Arete raised its target to $2,163 on Nov 10. The board also added a $500M buyback, bringing total capacity to $1B. A new CFO and CAO were appointed on Oct 29, which is a governance change but was not described as a negative. The price path is volatile: the stock fell 10.3% on Nov 5 on 2.63M shares, then gained 16.6% on Nov 9 on 1.67M shares. The Nov 9 move came alongside news that MPWR lost a patent suit it had brought against Reed Semiconductor, but the sources do not tie the rally to that news. Nov 10 traded in a $1,290-$1,387.87 range and closed at $1,357.60 on 1.08M shares, holding most of the Nov 9 gain. Upside is supported by guidance, buybacks and rising targets, while the sharp swings and the patent loss argue for caution in the short term.
News behind the analysis
- Arete Adjusts Price Target on Monolithic Power Systems to $2,163 From $2,013Arete raised its price target on MPWR to $2,163 from $2,013, about 59% above the Nov 10 close of $1,357.60.
- Reed Semiconductor Prevails in Patent Lawsuit Brought by Monolithic Power SystemsReed Semiconductor successfully defended itself against a patent infringement lawsuit that MPWR had brought. The stock rose 16.6% the same day on 1.67M shares, though the news does not link the two.
- Monolithic Power Systems Authorizes Additional $500 Million Share RepurchaseMPWR authorized a new $500 million buyback, bringing total current repurchase capacity to $1 billion.
- Truist Securities Adjusts Price Target on Monolithic Power Systems to $1,906Truist kept its Buy rating and raised its price target to $1,906 from $1,889.
- Rosenblatt Upgrades Monolithic Power Systems to BuyRosenblatt Securities upgraded MPWR to Buy with a new price target, reported on Benzinga as a $1,700 target.
- Monolithic Power Systems Q3 Adj. EPS $8.19 Beats $7.75 Estimate, Sales $1.202B Beat $1.145B EstimateQ3 adjusted EPS of $8.19 beat the $7.75 estimate, and sales of $1.202B beat the $1.145B estimate.
- Monolithic Power Systems Sees Q4 Sales $1.315B-$1.385B vs $1.201B EstQ4 sales guidance of $1.315B to $1.385B sits above the $1.201B analyst estimate.
- Monolithic Power Systems, Inc. Reports Q3 2026 Financial ResultsMPWR reported Q3 2026 adjusted EPS of $8.19, above the FactSet consensus of $7.79.
- Monolithic Power Systems Appoints Tony Balow CFO, Effective ImmediatelyTony Balow was named Vice President and Chief Financial Officer, and Robert Dean was named Chief Accounting Officer, effective immediately.
- Monolithic Power Systems Q3 2026 Earnings Call TranscriptThe full transcript of the Q3 2026 earnings call, held on Oct 29, is available for review.
About Monolithic Power Systems, Inc.
Monolithic Power Systems is a fabless chip company that designs power-management chips and modules. These parts convert and control voltages in AI and cloud servers, cars, storage, communications gear, industrial equipment and consumer electronics. It stands out for its own process technology and for highly integrated power modules, and it has grown quickly by supplying power delivery for AI data-center processors. In Q3 2026 it passed $1 billion in quarterly revenue for the first time, reporting about $1.2 billion, up roughly 63% from a year earlier.
How it makes money
MPS sells power chips and modules, mainly DC-to-DC converters, plus AC-to-DC parts, MOSFET drivers and power management ICs, to electronics makers around the world. It designs the chips and pays outside foundries to make them. Its sales are grouped by end market: enterprise data (AI and cloud servers), storage and computing, automotive, communications, industrial and consumer. Enterprise data has been the fastest-growing segment. The company says it expects that segment to grow at least 150% year over year, and enterprise data sales recently rose about 165%. MPS also returns cash to shareholders through a quarterly dividend (about $2 per share recently) and share buybacks (more than $450 million in Q3 2026).
What usually moves MPWR
- AI data-center and GPU server spending
- Design wins with major AI chip and server customers
- Competition in server power, e.g. integrated voltage regulators and Analog Devices' purchase of Empower
- Automotive and industrial demand cycles
- High valuation that makes the stock sensitive to growth expectations