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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
2021-11-08 Tseng Saria VP & General Counsel Returned to the company −2,022 $548.27 $1.1M 257,409
2021-11-08 Xiao Deming Pres. of MPS Asia Operations Sale −2,022 $548.27 $1.1M 281,255
2021-11-08 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −2,022 $548.27 $1.1M 278,831
2021-10-20 BLEGEN THEODORE CFO Sale −1,897 $496.59 $942K 125,738
2021-10-01 Tseng Saria VP & General Counsel Sale −4,330 $476.16 $2.1M 254,554
2021-10-01 Hsing Michael CEO Sale −11,020 $476.16 $5.2M 975,371
2021-10-01 BLEGEN THEODORE CFO Sale −910 $476.16 $433K 127,635
2021-10-01 Xiao Deming Pres. of MPS Asia Operations Returned to the company −4,330 $476.16 $2.1M 283,277
2021-10-01 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −4,330 $476.16 $2.1M 275,977
2021-09-20 BLEGEN THEODORE CFO Sale −540 $481.08 $260K 129,902
2021-09-20 BLEGEN THEODORE CFO Sale −400 $482.12 $193K 129,502
2021-09-20 BLEGEN THEODORE CFO Sale −380 $483.17 $184K 129,122
2021-09-20 BLEGEN THEODORE CFO Sale −240 $484.11 $116K 128,882
2021-09-20 BLEGEN THEODORE CFO Sale −200 $485.05 $97K 128,682
2021-09-20 BLEGEN THEODORE CFO Sale −20 $485.87 $10K 128,662
2021-09-20 BLEGEN THEODORE CFO Sale −79 $487.51 $39K 128,583
2021-09-20 BLEGEN THEODORE CFO Sale −38 $488.55 $19K 128,545
2021-08-30 Xiao Deming Pres. of MPS Asia Operations Sale −4,886 $500.00 $2.4M 287,607
2021-08-26 Xiao Deming Pres. of MPS Asia Operations Sale −6,495 $489.00 $3.2M 292,493
2021-08-24 Zhou Jeff Director Sale −300 $490.00 $147K 5,509

Page 60 of 72 · 1,433 trades