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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
2021-04-20 BLEGEN THEODORE CFO Sale −532 $364.48 $194K 154,779
2021-04-20 BLEGEN THEODORE CFO Sale −140 $365.22 $51K 154,639
2021-04-20 BLEGEN THEODORE CFO Sale −192 $366.42 $70K 154,447
2021-04-20 BLEGEN THEODORE CFO Sale −43 $367.36 $16K 154,404
2021-04-20 BLEGEN THEODORE CFO Sale −96 $368.50 $35K 154,308
2021-04-20 BLEGEN THEODORE CFO Sale −46 $369.95 $17K 154,262
2021-04-20 BLEGEN THEODORE CFO Sale −62 $371.29 $23K 154,200
2021-04-01 Xiao Deming Pres. of MPS Asia Operations Sale −4,305 $364.78 $1.6M 324,542
2021-04-01 Tseng Saria VP & General Counsel Sale −4,305 $364.78 $1.6M 267,212
2021-04-01 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −4,305 $364.78 $1.6M 320,410
2021-04-01 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −10 $358.79 $4K 1,193
2021-04-01 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −29 $360.70 $10K 1,164
2021-04-01 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −115 $363.43 $42K 1,049
2021-04-01 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −384 $365.12 $140K 665
2021-04-01 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −460 $366.02 $168K 205
2021-04-01 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −173 $366.93 $63K 32
2021-04-01 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −32 $368.02 $12K 0
2021-04-01 Hsing Michael CEO Sale −10,960 $364.78 $4.0M 1,017,449
2021-04-01 BLEGEN THEODORE CFO Sale −905 $364.78 $330K 156,097
2021-03-31 Sciammas Maurice Sr. V.P.of Sales and Marketing Gift −8,500 324,715

Page 65 of 72 · 1,433 trades