Monolithic Power Systems MPWR

Monolithic Power Systems, Inc. · Nasdaq · Semiconductors & Related Devices

$1,211.63+1.07%close on Oct. 30, 2026 · volume 2.0M · Yahoo Finance

Price, last 49 sessions

$1,200.00$1,300.00$1,400.00Sept. 2026Oct. 2026
Aug. 24, 2026 to Oct. 30, 2026 · high $1,479.89 · low $1,140.12 · SEC filing, placed when SEC released it

Our coverage

Insider buying and selling

DateInsiderTradeSharesAvg. priceValue
Sept. 28, 2026Michael Hsing
CEO, director
Sold
10b5-1 plan
30,000$1,344.97
$1,323.31-$1,356.94
$40.35 million
Aug. 24, 2026Robert W. Dean II
Interim CFO
Sold32$1,297.72$41,527
Aug. 24, 2026Kuo Wei Herbert Chang
director
Sold50$1,281.57$64,078
Aug. 17, 2026Robert W. Dean II
Interim CFO
Sold6$1,413.64$8,482
Aug. 11, 2026Kuo Wei Herbert Chang
director
Sold50$1,420.00$71,000
Aug. 5, 2026Robert W. Dean II
Interim CFO
Sold105$1,344.27$141,148
Aug. 3, 2026Maurice Sciammas
EVP, WW Sales & Marketing · indirect
Sold
10b5-1 plan
30$1,343.94$40,318

Open-market purchases and sales reported on SEC Form 4 filed since July 24, 2026; grants, option exercises and shares withheld for tax aren't shown. A trade under a 10b5-1 plan was scheduled in advance. Where a filing was amended, the amendment's figures are shown.

Recent SEC filings

All 14 →
  • 8-KOct. 29, 2026, 4:01 p.m. ETView on SEC.govOur explainer

    Results of operations and financial condition · Departure/appointment of directors or officers · Financial statements and exhibits

    AI summary, unreviewedMonolithic Power Systems Q3 2026 non-GAAP EPS of $8.19 beats $7.75 consensus on $1.20 billion revenue; Q4 revenue outlook of $1.315 billion to $1.385 billion tops Street $1.22 billion

  • 4Sept. 30, 2026, 5:21 p.m. ETView on SEC.gov
  • 8-KSept. 10, 2026, 4:01 p.m. ETView on SEC.gov

    Other events · Financial statements and exhibits

  • 4Sept. 2, 2026, 5:26 p.m. ETView on SEC.gov
  • 4Aug. 26, 2026, 7:22 p.m. ETView on SEC.gov
  • 4Aug. 25, 2026, 7:13 p.m. ETView on SEC.gov
  • 4Aug. 19, 2026, 8:44 p.m. ETView on SEC.gov
  • 4Aug. 13, 2026, 5:23 p.m. ETView on SEC.gov