Computed from SEC EDGAR filings and closing prices — not copied from any wealth ranking. Dataset . How we calculate this.
Market capitalisation
$60.67B
49,143,000 shares Covers every share class this company has on file.
Insiders on file
12
people who have filed Form 3, 4 or 5 naming this issuer
Value of insider-held stock
$2.38B
from the holdings reported on Forms 3/4/5; this figure has no separate as-of date on file
Insider-held share of market cap
3.92%
insider-held value divided by market capitalisation
What MONOLITHIC POWER SYSTEMS, INC. reports
Revenue and net income below are for fiscal period FY2025, the period label carried by this company’s own annual XBRL filings to the SEC. Fiscal years do not line up between companies — one company’s FY2026 can cover much the same months as another’s FY2025 — so compare the periods, not just the numbers.
Revenue
$2.79B
FY2025annual revenue, from this company’s own annual XBRL filings to the SEC
Net income
$621.48M
FY2025profit for the period, from this company’s own annual XBRL filings to the SEC
Employees
4,501
Yahoo Finance
Where the employee count comes fromi
Headcount comes from Yahoo Finance, not from a filing. The date beside it is the day we retrieved the figure — it is not the date the company counted its staff, and Yahoo does not publish that date. Unlike the SEC filings behind the other figures on this page, this one carries no open licence, so we publish the number and nothing else from that source.
Insiders at MONOLITHIC POWER SYSTEMS, INC.
Shares is what each person last reported holding here.i
Everyone below has filed at least one insider report against this company.
Value is that share count priced at the same closing price used everywhere else on this site. A row priced from only some of a person’s securities says so — we do not quietly present a partial sum as a complete one.
Rows are grouped by the role each person reports.i
The role comes from the relationship boxes a person ticks on their own insider filings — officer, director, ten per cent owner — not from anything we infer. Somebody who is both an officer and a director appears once, in the combined group, so the row count still matches the figure at the top of this page. Where no filing states a role we say so instead of guessing one.
People who file insider reports against MONOLITHIC POWER SYSTEMS, INC..
Detected automatically in the filings linked below. Each headline is built from the numbers in those filings, not written by a model. Newest first; events older than 45 days stay listed and are marked as older.
Maurice Sciammas sold 5,640 MONOLITHIC POWER SYSTEMS, INC. (MPWR) shares for $7,630,638 on Jul 15, 2026
Large trade for this person
Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.
Maurice Sciammas sold 5,640 MONOLITHIC POWER SYSTEMS, INC. (MPWR) shares for $7,630,638 on Jul 15, 2026
Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.
Saria Tseng sold 7,565 MONOLITHIC POWER SYSTEMS, INC. (MPWR) shares for $12,860,500 on May 27, 2026
Large trade for this person
Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.
Saria Tseng sold 7,565 MONOLITHIC POWER SYSTEMS, INC. (MPWR) shares for $12,860,500 on May 27, 2026
Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.
Saria Tseng sold 5,000 MONOLITHIC POWER SYSTEMS, INC. (MPWR) shares for $7,932,150 on May 22, 2026
Large trade for this person
Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.
Saria Tseng sold 5,000 MONOLITHIC POWER SYSTEMS, INC. (MPWR) shares for $7,932,150 on May 22, 2026
Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.
Michael Hsing sold 23,293 MONOLITHIC POWER SYSTEMS, INC. (MPWR) shares for $34,425,061 on May 18, 2026
Large trade for this person
Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.
Michael Hsing sold 23,293 MONOLITHIC POWER SYSTEMS, INC. (MPWR) shares for $34,425,061 on May 18, 2026
Total of the rows above: $34,425,061, in the currency the filings report.
Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.
Saria Tseng sold 9,080 MONOLITHIC POWER SYSTEMS, INC. (MPWR) shares for $9,127,034 on Mar 30, 2026
Large trade for this person
Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.
Saria Tseng sold 9,080 MONOLITHIC POWER SYSTEMS, INC. (MPWR) shares for $9,127,034 on Mar 30, 2026
Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.
Michael Hsing sold 25,364 MONOLITHIC POWER SYSTEMS, INC. (MPWR) shares for $29,553,295 on Feb 12, 2026
Large trade for this person
Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.
Michael Hsing sold 25,364 MONOLITHIC POWER SYSTEMS, INC. (MPWR) shares for $29,553,295 on Feb 12, 2026
Total of the rows above: $29,553,295, in the currency the filings report.
Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.
Recent insider transactions
Of the 714 rows we hold,
0 are open-market
purchases and
645 open-market
sales (S) — the only codes we count as buying or selling.i
The rest — awards, shares withheld to pay tax, option exercises, gifts and so on — follow from an employment contract or a transfer arranged off-market, not from a decision to buy or sell, so counting them would turn this into a pay table.
A price of 0.00 is a real reported figure on gifts (G) and share awards (A) — not a gap in our data.
Insider transactions disclosed to the SEC for MONOLITHIC POWER SYSTEMS, INC., newest first, each with the filing behind it.
From SEC Form 4 filings. Every row links to the filing it
came from. How we calculate this.
What a Form 4 isi
The report an officer, director or large shareholder must file after trading their own company’s stock.
Subsidiaries — 19 legal entities
Subsidiaries of MONOLITHIC POWER SYSTEMS, INC.
19 legal entities named in the subsidiary exhibit filed with this company’s most recent 10-K. .
Filing on SEC.gov.
This is not the full list. SEC rules only require a company to name
its significant subsidiaries.
What that leaves outi
Smaller entities are left out of the exhibit entirely. A short list here means a short exhibit — it does not mean the company owns nothing else. Nothing on this page is inferred: every name below is copied from the filing.
Subsidiaries MONOLITHIC POWER SYSTEMS, INC. names in its
most recent annual report, with the place each one is organised.
Subsidiary
Organised in
Axign B.V.
—
Chengdu Monolithic Power Systems Co., Ltd.
—
China MPS International (Shanghai) Ltd.
—
Hangzhou MPS Semiconductor Technology Ltd.
—
M2 Holding, LLC
—
Monolithic Power Malaysia Sdn. Bhd.
—
Monolithic Power Spain, S.L.
—
Monolithic Power Systems (Singapore) Pte. Ltd.
—
MPS France Sàrl
—
MPS Germany GmbH
—
MPS International (Taiwan) Ltd.
—
MPS International Korea Co., Ltd.
—
MPS International S.à.r.l.
—
MPS Japan G.K.
—
MPS Japan K.K.
—
MPS Portugal, Unipessoal Lda.
—
MPS Schaffhausen International GmbH
—
MPS Tech Switzerland Sàrl
—
MSN Equipment Leasing LLC
—
What counts as a subsidiaryi
A subsidiary is a separate legal entity this company controls; it is not the same thing as a brand, a division or an office. These entities do not file with the SEC in their own right, so there is no separate page to open for them.
Think a number here is wrong?
Open the linked filing and compare —
how to report it.
Sources and technical notes
Every figure on this page comes from filings to the U.S. SEC via EDGAR.
Nothing here is estimated, and nothing is taken from press coverage or company websites.
Share count: cover page of the latest filing (dei:EntityCommonStockSharesOutstanding), taken from
MONOLITHIC POWER SYSTEMS, INC.’s own filings and multiplied by our closing price.
Full method.
What that share count meansi
the share count the company itself prints on the cover of its most recent filing, as of the date it signed that filing.
We do not take a market cap from a data vendor, and we do not estimate one: the figure
is a share count from MONOLITHIC POWER SYSTEMS, INC.’s
own SEC filings multiplied by
the closing price we hold for the same stock.
Logo:
Monolithic Power Systems, Inc. /
Public domain
, via Wikimedia Commons ↗
— used here to identify the company. Trademarks remain the property of their owner.
