MPWR · Technology
Monolithic Pwr Sys Inc
26/100
Smart-money confidence1 of 3 sources positive
Below average interest
company insiders are selling
What this band has actually done: stocks scoring 25–45 beat the S&P 500 over the next three months 45.3% of the time, across 39,662 cases since 2015. That is below a coin flip — and so is every other band, because the median stock loses to a cap-weighted index. How we measured this
Hedge funds
51
Congress
No data
Insiders
0
Cross-source blend of hedge-fund breadth, Congress trades, and insider Form 4s. ·
how the score works
Market cap
$65.6B
Industry
Semiconductors
Sector
Technology
Exchange
NasdaqGS
About MONOLITHIC PWR SYS INC
Monolithic Power Systems, Inc. provides semiconductor-based power electronics solutions in China, Taiwan, South Korea, Southeast Asia, Europe, the United States, Japan, and internationally. The company offers direct current (DC) to DC solutions to convert and control voltages within a range of electronic systems, such as cloud-based and on-premises CPU servers and workstations, AI systems, memory, storage solutions, notebooks, infotainment, power sources, home appliances, network infrastructure, and satellite communications. It also provides alternating current (AC) to DC; driver…
Who's behind the signal
Every informed buyer we can see on MPWR, across all three feeds.
Hedge funds · 10
D1 Capital Partners (Sundheim)
New position
Millennium Management (Englander)
New position
Renaissance Technologies
New position
Maverick Capital (Ainslie)
New position
Baillie Gifford & Co
New position
Gotham Asset Mgmt (Greenblatt)
Increased +6%
+4 more in the full breakdown below ↓
Congress · 6
Byron Donalds
sold
Markwayne Mullin
bought
Michael Guest
bought
Robert P. Bresnahan, Jr.
bought
Tommy Tuberville
sold
Donna E. Shalala
sold
Insiders
Company insiders
Selling
Recent sells25
Congressional trades · 8 on record
Disclosures from 2019-06-24 to 2026-06-05
| Trade date | Member | Chamber | Action | Amount |
|---|---|---|---|---|
| 2026-06-05 | Byron Donalds · R-FL | House | Sold | $1,001 - $15,000 |
| 2026-02-04 | Markwayne Mullin · R-OK | Senate | Bought | $15,001 - $50,000 |
| 2026-01-05 | Markwayne Mullin · R-OK | Senate | Bought | $15,001 - $50,000 |
| 2025-10-20 | Michael Guest · R-MS | House | Bought | $1,001 - $15,000 |
| 2025-04-08 | Robert P. Bresnahan, Jr. · R-PA | House | Bought | $1,001 - $15,000 |
| 2025-01-13 | Robert P. Bresnahan, Jr. · R-PA | House | Sold | $1,001 - $15,000 |
| 2024-05-03 | Tommy Tuberville · R-AL | Senate | Sold | $1,001 - $15,000 |
| 2019-06-24 | Donna E. Shalala · D-FL | House | Sold | $1,001 - $15,000 |
Not a model pick — but on our radar.
MONOLITHIC PWR SYS INC isn't in the top-10 model right now, but 10 tracked investors hold it. Everything below is real signal from public filings — treat this as a watch candidate, not a conviction call.
10
Investors
5
New positions
3
Increasing
2
Decreasing
0
Unchanged
Price History
Loading price data...
A member of Congress bought
A member sold
Return:
High:
Low:
Markers sit on the transaction date the member disclosed, snapped to the nearest close on the chart. They are not the date the public found out — that came later, and the gap is its own page. Every marker is listed by name in the table above.
Who's Holding This Stock
Position sizes and recent activity from tracked institutional investors
Trust weight: 1.3×
% of portfolio
0.3%
Position change
NEW
0.3% of D1 Capital Partners's portfolio
Trust weight: 1.0×
% of portfolio
0.1%
Position change
NEW
0.1% of Millennium Management's portfolio
Trust weight: 1.0×
% of portfolio
0.1%
Position change
NEW
0.1% of Renaissance Technologies's portfolio
Trust weight: 1.2×
% of portfolio
0.0%
Position change
NEW
0.0% of Maverick Capital's portfolio
Trust weight: 1.4×
% of portfolio
0.0%
Position change
NEW
0.0% of Baillie Gifford & Co's portfolio
Trust weight: 1.1×
% of portfolio
0.1%
Position change
+6%
0.1% of Gotham Asset Mgmt's portfolio
Trust weight: 1.0×
% of portfolio
0.1%
Position change
+370%
0.1% of Citadel Advisors's portfolio
Trust weight: 1.0×
% of portfolio
0.0%
Position change
+149%
0.0% of D.E. Shaw & Co's portfolio
Trust weight: 1.3×
% of portfolio
0.0%
Position change
−74%
0.0% of Bridgewater Associates's portfolio
Trust weight: 1.0×
% of portfolio
0.0%
Position change
−35%
0.0% of AQR Capital Management's portfolio
Portfolio Allocation
How much of each investor's portfolio is allocated to MONOLITHIC PWR SYS INC
Insider Trading (Form 4)
Recent trades by company officers and directors — filed within 2 days of each trade
Bearish
Sentiment
0
Buys
25
Sells
| Date | Insider | Title | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-08-24 | DEAN ROBERT W II | Insider | SELL | 32 | $1297.72 | $41,527 |
| 2026-08-24 | CHANG KUO WEI HERBERT | Insider | SELL | 50 | $1281.57 | $64,078 |
| 2026-08-17 | DEAN ROBERT W II | Insider | SELL | 6 | $1413.64 | $8,482 |
| 2026-08-11 | CHANG KUO WEI HERBERT | Insider | SELL | 50 | $1420.00 | $71,000 |
| 2026-08-05 | DEAN ROBERT W II | Insider | SELL | 105 | $1344.27 | $141,148 |
| 2026-08-03 | Sciammas Maurice | Insider | SELL | 30 | $1343.94 | $40,318 |
| 2026-07-15 | Sciammas Maurice | Insider | SELL | 110 | $1405.71 | $154,628 |
| 2026-07-15 | Sciammas Maurice | Insider | SELL | 117 | $1400.45 | $163,853 |
| 2026-07-15 | Sciammas Maurice | Insider | SELL | 213 | $1396.16 | $297,382 |
| 2026-07-15 | Sciammas Maurice | Insider | SELL | 50 | $1388.19 | $69,410 |
| 2026-07-15 | Sciammas Maurice | Insider | SELL | 410 | $1384.11 | $567,485 |
| 2026-07-15 | Sciammas Maurice | Insider | SELL | 418 | $1378.73 | $576,309 |
| 2026-07-15 | Sciammas Maurice | Insider | SELL | 472 | $1375.47 | $649,222 |
| 2026-07-15 | Sciammas Maurice | Insider | SELL | 240 | $1369.18 | $328,603 |
| 2026-07-15 | Sciammas Maurice | Insider | SELL | 50 | $1359.36 | $67,968 |
| 2026-07-15 | Sciammas Maurice | Insider | SELL | 5,640 | $1352.95 | $7,630,638 |
| 2026-07-15 | Sciammas Maurice | Insider | SELL | 1,506 | $1348.91 | $2,031,458 |
| 2026-07-15 | Sciammas Maurice | Insider | SELL | 1,864 | $1344.16 | $2,505,514 |
| 2026-07-15 | Sciammas Maurice | Insider | SELL | 1,460 | $1339.59 | $1,955,801 |
| 2026-07-15 | Sciammas Maurice | Insider | SELL | 776 | $1334.59 | $1,035,642 |
Showing the 20 most recent of 25 buys & sells.
⚠ Disclaimer: This page is for informational purposes only. Holdings data from SEC EDGAR 13F filings, delayed up to 135 days. Not a recommendation to buy or sell MONOLITHIC PWR SYS INC or any security.
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