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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
2021-02-09 Moyer James C Director Sale −2,299 $374.93 $862K 238,969
2021-02-09 Moyer James C Director Sale −1,015 $376.18 $382K 237,954
2021-02-09 Moyer James C Director Sale −1,380 $377.19 $521K 236,574
2021-02-09 Moyer James C Director Sale −1,083 $378.33 $410K 235,491
2021-02-09 Moyer James C Director Sale −856 $379.17 $325K 234,635
2021-02-09 Moyer James C Director Sale −694 $380.61 $264K 233,941
2021-02-09 Moyer James C Director Sale −100 $381.79 $38K 233,841
2021-02-09 Xiao Deming Pres. of MPS Asia Operations Sale −4,092 $372.89 $1.5M 337,847
2021-02-09 Tseng Saria VP & General Counsel Sale −4,092 $372.89 $1.5M 293,543
2021-02-09 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −4,956 $372.89 $1.8M 349,126
2021-02-09 Hsing Michael CEO Sale −14,899 $372.89 $5.6M 1,110,970
2021-02-09 BLEGEN THEODORE CFO Sale −2,922 $372.89 $1.1M 163,109
2021-02-05 Xiao Deming Pres. of MPS Asia Operations Sale −13,359 $366.34 $4.9M 341,939
2021-02-05 Tseng Saria VP & General Counsel Sale −13,358 $366.34 $4.9M 297,635
2021-02-05 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −15,875 $366.34 $5.8M 354,082
2021-02-05 Hsing Michael CEO Sale −52,729 $366.34 $19.3M 1,125,869
2021-02-05 BLEGEN THEODORE CFO Sale −11,010 $366.34 $4.0M 166,031
2021-02-02 Zhou Jeff Director Grant or award +533 11,709
2021-02-02 Xiao Deming Pres. of MPS Asia Operations Option exercise +32,165 295,112
2021-02-02 Xiao Deming Pres. of MPS Asia Operations Grant or award +60,186 $30.00 $1.8M 355,298

Page 71 of 72 · 1,433 trades