Is MPWR stock a buy right now?

Is MPWR worth buying right now? That depends on your goals and timeline, and we do not make that call for anyone. We can lay out the evidence investors usually weigh. Of 23 Wall Street analysts covering MPWR, 19 rate it a buy, 4 a hold and 0 a sell — a consensus of Buy.

Below, we look at where the stock trades today, what Wall Street analysts think, how valuation compares with similar companies and what insiders have done with their own shares.

The chart below tracks MPWR's daily closing price from May 5, 2026 to Oct. 29, 2026. The stock fell 24.3% over that span, from $1,583.47 to $1,198.81. It reached a high of $1,684.95 on June 3, 2026 and a low of $1,140.12 on Oct. 23, 2026. Red circles mark weeks when insiders sold shares on the open market. There were 12 such weeks, and larger circles mean more money. No green diamonds appear: no insider bought on the open market in this window.

Where MPWR trades today

The close was $1198.81 on Oct. 29, 2026, 28.9% from the 52-week high of $1684.95. That puts it 40.8% above the 52-week low of $851.43. The one-month change is -11.0%; the three-month change is -15.8%.

What analysts say about MPWR

Of 23 Wall Street analysts covering MPWR, 19 rate it a buy, 4 a hold and 0 a sell — a consensus of Buy. Ratings changed little over three months.

MPWR valuation in one line

MPWR trades at a P/E of 73.2, 18.0× sales, revenue +28.7% year over year (latest quarter Jun 2026).

Also worth knowing about MPWR

Live MPWR data, updated every 30 minutes: MPWR insider trades, ownership and filings →

In Monolithic Power Systems, Inc.'s own words

“Overall, we see accelerated growth. Our diversified growth strategy is paying off”

— Michael Hsing, CEO and founder of MPS · SEC filing

From the company's earnings release filed with the SEC on 2026-10-29 (Form 8-K).

What would change the picture for MPWR

These are the specific events and levels to watch. None of them is a prediction.

• The Oct. 29, 2026 earnings report is 0 days away. Monolithic Power Systems, Inc. beat estimates in 3 of the last 4 quarters, with an average surprise of +3.4%. A miss would break that pattern.
• An open-market purchase by an insider at Monolithic Power Systems, Inc. has not happened in 90 days. Form 4 filings would show one within two business days of the trade.
• Analyst ratings: the average score moved from 4.2 to 4.13 over three months. The scale runs from 5 for strong buy to 1 for strong sell. A run of downgrades after earnings usually shows up here first.
• Price levels: a close above $1684.95 would mark a new 52-week high, 40.6% above the latest close of $1198.81. A close below $851.43 would mark a new 52-week low, 29.0% below that level.
• Growth: revenue rose 28.7% year over year in the quarter ending Jun 2026, a trend described as accelerating. At a P/E of 73.2, a slowdown would matter more than at a lower multiple.
• New shares: dilution risk is low now. A new shelf registration (S-3) or prospectus supplement (424B) for an offering would raise it.

MPWR history: what happened after similar moves

Since 2023, MPWR fell 11.0% or more in a month 11 times (separate episodes, not counting the current one). Three months later it was higher in 7 of 10 cases; the median change was +22.9%.

Past moves don't predict the next one; they show how volatile the stock has been.

Questions people also ask

What is MPWR's 52-week high and low?

Over the past year, MPWR closed as high as $1684.95 and as low as $851.43. At $1198.81 on Oct. 29, 2026, the stock is down 28.9% from the high and 40.8% above the low.

When does Monolithic Power Systems, Inc. report earnings next?

The next report is expected on Oct. 29, 2026, 0 days from now. Monolithic Power Systems, Inc. beat the average estimate in 3 of its last 4 reports.

Is Monolithic Power Systems, Inc. issuing new shares?

Dilution risk reads low at 0/100. The share count rose 2.6% in a year.

Who is the largest shareholder of MPWR?

Among investment managers that file Form 13F, BlackRock Inc. reported the largest MPWR position at $7.7 billion. 1239 institutions reported holding MPWR for Q2 2026.

Are MPWR insiders buying or selling?

Insiders sold $40.7 million of MPWR on the open market in 90 days and bought none. Sales are often routine, for taxes, diversification or pre-planned plans. Purchases with their own money are the stronger signal.

Does MPWR pay a dividend?

Yes: $7.12 per share over the last 12 months, about 0.59% at today's price.

Dates to watch for MPWR

Insider trades can come any day: they must be filed on Form 4 within two business days.

Key terms on this page

P/E ratio

Price divided by the last 12 months of earnings per share. A P/E of 20 means investors pay $20 for each $1 of yearly profit. It is only defined when the company is profitable.

Price-to-sales

Market value divided by the last 12 months of revenue. Useful for companies with little or no profit, but it ignores margins.

Form 4

The SEC form a company's officers, directors and 10% owners must file within two business days of buying or selling its stock.

Open-market trade

A purchase or sale on the exchange at the market price, paid with the insider's own money (code P or S on Form 4), as opposed to option exercises, grants or gifts.

Form 13F

A quarterly SEC report listing the U.S. stock holdings of every investment manager with more than $100 million. It is due 45 days after each quarter ends, so it shows positions with a delay.

Dilution

When a company issues new shares, each existing share owns a smaller piece of the company. Common sources: stock offerings, convertible debt and large stock-based pay.

Form 8-K

The SEC form for material events between quarterly reports: earnings releases, deals, executive changes, stock offerings and similar news.

Where these numbers come from

Every number on this page is computed from the data when the page is refreshed (usually daily); nothing is typed in by hand. This is information, not investment advice.

• Price: daily closing prices run through Oct. 29, 2026. Changes use 5, 21 and 63 trading days. The 52-week range uses the last 252 closes.
• Insider trades: SEC Form 4 filings cover the last 90 days. They count only open-market purchases (code P) and sales (code S). Option exercises, grants, gifts and filings with data errors are left out.
• Analyst ratings: counts of current ratings from 23 analysts, compared with three months ago.
• Earnings dates and estimates come from a market-data calendar. The data covers reported versus expected EPS for the last 4 quarters.
• Valuation and growth data come from the company's SEC filings, including revenue, earnings, margins and share counts. The data uses XBRL for the latest quarter, Jun 2026. P/E and price/sales use the latest close.
• Fund ownership: SEC Form 13F filings for Q2 2026.
• Dilution: share-count changes and offering-related SEC filings, including shelf registrations, prospectus supplements and convertible notes, are tracked over two years and scored 0-100.
• History: 21-trading-day moves over about three years of daily closes, counted once per episode.