MPWR Slides as Sector Weakness and Recent Overhangs Weigh on Shares

Monolithic Power Systems (MPWR) is down 3.7% today. Here is some analysis on what might have caused this price movement.

Analysis: The most likely driver appears to be broader semiconductor weakness rather than a fresh company-specific blow. This could be because investors are trimming richly valued chip names ahead of earnings, while recent insider selling and a recent analyst downgrade may still be acting as overhangs on sentiment.

Details:

Monolithic Power Systems recently announced it will report third-quarter 2026 results on October 29, leaving the stock in a typical pre-earnings positioning window where traders often reduce exposure.

Broader semiconductor shares have been under pressure in recent sessions, with commentary around AI revenue durability and valuation causing investors to pull back from chip stocks.

A recent ratings change moved MPWR to a more neutral stance from one research shop earlier this month, which may have tempered momentum even though the broader analyst view remains bullish.

Recent disclosures also showed CEO Michael Hsing sold shares under a trading plan in late September, which may have added to short-term caution even if the sale was not necessarily a fundamental negative signal.

Sources:

Monolithic Power Systems, SEC, MarketBeat, Nasdaq

Disclaimer: This price movement analysis was generated with the help of AI. Please double-check the information provided for mistakes.

$MPWR Insider Trading Activity

$MPWR insiders have traded $MPWR stock on the open market 65 times in the past 6 months. Of those trades, 0 have been purchases and 65 have been sales.

Here’s a breakdown of recent trading of $MPWR stock by insiders over the last 6 months:

MICHAEL HSING (CEO) has made 0 purchases and 21 sales selling 70,000 shares for an estimated $99,659,215.
MAURICE SCIAMMAS (EVP, WW Sales & Marketing) has made 0 purchases and 31 sales selling 27,500 shares for an estimated $39,759,181.
SARIA TSENG (EVP & General Counsel) has made 0 purchases and 2 sales selling 12,565 shares for an estimated $20,792,650.
JEFF ZHOU has made 0 purchases and 4 sales selling 2,000 shares for an estimated $3,250,762.
ROBERT W II DEAN (Interim CFO) has made 0 purchases and 5 sales selling 169 shares for an estimated $233,700.
KUO WEI HERBERT CHANG has made 0 purchases and 2 sales selling 100 shares for an estimated $135,078.

To track insider transactions, check out Quiver Quantitative's insider trading dashboard. You can access data on insider stock transactions through the Quiver Quantitative API insider transaction endpoint.

$MPWR Hedge Fund Activity

We have seen 607 institutional investors add shares of $MPWR stock to their portfolio, and 525 decrease their positions in their most recent quarter.

Here are some of the largest recent moves:

INVESCO LTD. added 858,837 shares (+57.8%) to their portfolio in Q2 2026, for an estimated $1,187,221,915
FMR LLC added 776,427 shares (+17.6%) to their portfolio in Q2 2026, for an estimated $1,073,301,627
BLACKROCK, INC. removed 482,542 shares (-7.9%) from their portfolio in Q2 2026, for an estimated $667,046,759
T. ROWE PRICE INVESTMENT MANAGEMENT, INC. removed 476,308 shares (-100.0%) from their portfolio in Q2 2026, for an estimated $658,429,126
JPMORGAN CHASE & CO added 434,949 shares (+inf%) to their portfolio in Q2 2026, for an estimated $601,256,099
SIXTH STREET PARTNERS MANAGEMENT COMPANY, L.P. added 388,951 shares (+inf%) to their portfolio in Q2 2026, for an estimated $537,670,304
PRICE T ROWE ASSOCIATES INC /MD/ removed 286,156 shares (-22.7%) from their portfolio in Q2 2026, for an estimated $395,570,608

To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard. You can access data on hedge funds moves and 13F filings through the Quiver Quantitative API 13F endpoint.

$MPWR Congressional Stock Trading

Members of Congress have traded $MPWR stock 2 times in the past 6 months. Of those trades, 0 have been purchases and 2 have been sales.

Here’s a breakdown of recent trading of $MPWR stock by members of Congress over the last 6 months:

REPRESENTATIVE BYRON DONALDS has traded it 2 times. They made 0 purchases and 2 sales worth up to $30,000 on 06/05.

To track congressional stock trading, check out Quiver Quantitative's congressional trading dashboard. You can access data on congressional stock trades through the Quiver Quantitative API Congress trades endpoint.

$MPWR Analyst Ratings

Wall Street analysts have issued reports on $MPWR in the last several months. We have seen 1 firms issue buy ratings on the stock, and 0 firms issue sell ratings.

Here are some recent analyst ratings:

Needham issued a "Buy" rating on 05/01/2026

To track analyst ratings and price targets for $MPWR, check out Quiver Quantitative's $MPWR forecast page.

$MPWR Price Targets

Multiple analysts have issued price targets for $MPWR recently. We have seen 6 analysts offer price targets for $MPWR in the last 6 months, with a median target of $1800.0.

Here are some recent targets:

N. Quinn Bolton from Needham set a target price of $1750.0 on 05/01/2026
Kevin Cassidy from Rosenblatt set a target price of $1575.0 on 05/01/2026
John Vinh from Keybanc set a target price of $2000.0 on 05/01/2026
Joe Quatrochi from Wells Fargo set a target price of $1860.0 on 05/01/2026
Joshua Buchalter from TD Cowen set a target price of $1850.0 on 05/01/2026
Tore Svanberg from Stifel set a target price of $1500.0 on 04/16/2026

This article is not financial advice. See Quiver Quantitative's disclaimers for more information. Note that there may be inaccuracies due to mistakes in ticker-mapping, and other anomalies.