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CIK 0001280452 · Large accelerated filer

MONOLITHIC POWER SYSTEMS, INC.

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Ticker
MPWR
Exchange
Nasdaq
Industry
Semiconductors & Related Devices
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
770466789
Phone
561-839-3999
Business address
1555 PALM BEACH LAKES BLVD., WEST PALM BEACH, FL, 33401
Former names
MONOLITHIC POWER SYSTEMS INC
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$40,463,134
in 4 filings, $40.3M under 10b5-1 plans

Net −$40,463,134. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. Hsing Michael −$40.3M CEO sold 4% of stake
  2. CHANG KUO WEI HERBERT −$64K Director sold 9% of stake
  3. DEAN ROBERT W II −$50K Interim CFO sold <1% of stake

Reading 100 more Form 4s from the SEC; this list fills in as they're read.

Date Insider Transaction Shares Price Value Owned after
2021-02-02 Xiao Deming Pres. of MPS Asia Operations Option exercise · Performance Shares −32,165 0
2021-02-02 Tseng Saria VP & General Counsel Option exercise +32,165 250,807
2021-02-02 Tseng Saria VP & General Counsel Grant or award +60,186 $30.00 $1.8M 310,993
2021-02-02 Tseng Saria VP & General Counsel Option exercise · Performance Shares −32,165 0
2021-02-02 Sciammas Maurice Sr. V.P.of Sales and Marketing Option exercise +32,165 309,771
2021-02-02 Sciammas Maurice Sr. V.P.of Sales and Marketing Grant or award +60,186 $30.00 $1.8M 369,957
2021-02-02 Sciammas Maurice Sr. V.P.of Sales and Marketing Option exercise · Performance Shares −32,165 0
2021-02-02 Moyer James C Director Grant or award +533 248,841
2021-02-02 Lee Victor K Director Grant or award +533 28,872
2021-02-02 Hsing Michael CEO Option exercise +96,500 946,155
2021-02-02 Hsing Michael CEO Grant or award +232,443 $30.00 $7.0M 1,178,598
2021-02-02 Hsing Michael CEO Option exercise · Performance Shares −96,500 0
2021-02-02 Elmiger Eugen J Director Grant or award +533 19,518

Page 72 of 72 · 1,433 trades