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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
2021-08-20 BLEGEN THEODORE CFO Sale −1,897 $469.24 $890K 130,442
2021-08-20 Zhou Jeff Director Sale −300 $477.00 $143K 5,809
2021-08-19 Xiao Deming Pres. of MPS Asia Operations Sale −4,739 $462.00 $2.2M 298,988
2021-08-16 Xiao Deming Pres. of MPS Asia Operations Other acquisition +29 $323.24 $9K 303,727
2021-08-12 BLEGEN THEODORE CFO Sale −1,379 $457.10 $630K 132,339
2021-08-12 Xiao Deming Pres. of MPS Asia Operations Sale −1,651 $457.10 $755K 303,698
2021-08-12 Hsing Michael CEO Sale −6,373 $457.10 $2.9M 986,391
2021-08-12 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −1,651 $457.10 $755K 280,307
2021-08-12 Tseng Saria VP & General Counsel Sale −1,651 $457.10 $755K 258,861
2021-08-09 Xiao Deming Pres. of MPS Asia Operations Sale −2,053 $459.12 $943K 305,349
2021-08-09 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −2,053 $459.12 $943K 281,958
2021-08-09 Hsing Michael CEO Sale −7,926 $459.12 $3.6M 992,764
2021-08-09 Tseng Saria VP & General Counsel Sale −2,053 $459.12 $943K 260,512
2021-08-09 BLEGEN THEODORE CFO Sale −1,474 $459.12 $677K 133,718
2021-08-06 Moyer James C Director Sale −2,000 $461.53 $923K 0
2021-08-06 Moyer James C Director Sale −2,981 $460.22 $1.4M 68,842
2021-08-06 Moyer James C Director Sale −2,019 $461.16 $931K 66,823
2021-08-04 Zhou Jeff Director Sale −400 $465.22 $186K 6,109
2021-08-02 Xiao Deming Pres. of MPS Asia Operations Sale −3,895 $454.40 $1.8M 310,002
2021-08-02 Xiao Deming Pres. of MPS Asia Operations Sale −1,200 $455.46 $547K 308,802

Page 61 of 72 · 1,433 trades