Monolithic Power Systems (MPWR): financials, SEC filings and peers

Monolithic Power Systems (MPWR) is a semiconductors company in the Information Technology sector of the S&P 500, headquartered in Kirkland, Washington.

It was founded in 1997 and joined the S&P 500 on February 12, 2021.

Its fiscal year ends in December, and its shares trade on the Nasdaq.

In its SEC filings it is classified as “Semiconductors & Related Devices”.

Monolithic Power Systems at a glance

Revenue (12 months): $3.7B
Revenue growth: +40.5%
Operating margin: 29.5%
Net income (12 months): $893M
Free cash flow (12 months): $609M
Cash: $561M
Debt: —
Diluted EPS (12 months): $18.14

Twelve months to September 30, 2026, from the 10-Q filed November 3, 2026.

Latest twelve months

Over the twelve months to September 30, 2026, Monolithic Power Systems reported revenue of $3.7 billion, up a strong 40.5% from $2.7 billion a year earlier.

Its operating margin was 29.5%, up 3.5 percentage points from a year earlier: for every $100 of sales, about $29 was left as operating profit.

Net income was $893 million (23.9% of revenue), 47.6% lower than a year earlier.

Profit fell while sales grew, which usually points to higher costs, heavier investment or one-time items. The filings explain which.

Operating cash flow was $873 million and capital spending $264 million, leaving free cash flow of $609 million (16.3% of revenue).

At the end of the period it held $561 million in cash and not reported in debt, a net cash position of $561 million.

The diluted share count rose 2.4% in a year, which dilutes existing shareholders.

Five-year trend

Revenue went from $844 million in fiscal 2020 to $2.8 billion in fiscal 2025, about 27.0% a year.
Revenue has grown for 5 fiscal years in a row.
Operating margin widened from 18.8% to 26.1% over the same years.
Free cash flow was positive in each of the last 6 fiscal years.

Fiscal year	2021	2022	2023	2024	2025
Revenue	$1.2B	$1.8B	$1.8B	$2.2B	$2.8B
Revenue growth	43.0%	48.5%	1.5%	21.2%	26.4%
Operating margin	21.7%	29.4%	26.5%	24.4%	26.1%
Net income	$242M	$438M	$427M	$1.6B	$621M
Free cash flow	$226M	$188M	$581M	$642M	$666M
Diluted EPS	$5.05	$9.05	$8.76	$32.60	$12.86

Fiscal years as reported in Monolithic Power Systems’s 10-K filings. Free cash flow is operating cash flow minus capital spending.

Recent SEC filings

10-Q filed November 3, 2026 — quarterly report
8-K filed October 29, 2026 — Earnings results; Executive or director change
8-K filed September 10, 2026 — Other event
10-Q filed August 5, 2026 — quarterly report
8-K filed July 30, 2026 — Earnings results
8-K filed June 12, 2026 — Shareholder vote results; Other event
10-Q filed May 4, 2026 — quarterly report
8-K filed April 30, 2026 — Earnings results

All Monolithic Power Systems filings on SEC EDGAR

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Questions about Monolithic Power Systems

Is Monolithic Power Systems's revenue growing?

Yes. Revenue for the twelve months to September 30, 2026 was $3.7 billion, up 40.5% from a year earlier, according to its SEC filings.

Is Monolithic Power Systems profitable?

Yes. It earned $893 million in net income over the twelve months to September 30, 2026, a net margin of 23.9%.

When did Monolithic Power Systems last file financial results?

Its latest quarterly report (10-Q) was filed with the SEC on November 3, 2026.

Which companies are similar to Monolithic Power Systems?

In the S&P 500, Monolithic Power Systems is grouped in Semiconductors within the Information Technology sector. Analog Devices (ADI), Advanced Micro Devices (AMD), Broadcom (AVGO), First Solar (FSLR), Intel (INTC) are in the same group.

Understand the numbers

Source: Monolithic Power Systems’s filings with the U.S. Securities and Exchange Commission (EDGAR), retrieved November 11, 2026. Figures are as reported by the company and may be restated. This page is for information only and is not financial advice.