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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
2021-02-16 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −800 $393.99 $315K 333,126
2021-02-16 Sciammas Maurice Sr. V.P.of Sales and Marketing Other acquisition +89 $239.17 $21K 333,215
2021-02-16 Xiao Deming Pres. of MPS Asia Operations Sale −5,000 $398.00 $2.0M 332,847
2021-02-12 Zhou Jeff Director Sale −200 $388.00 $78K 11,509
2021-02-11 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −150 $376.40 $56K 348,976
2021-02-11 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −940 $377.56 $355K 348,036
2021-02-11 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −1,200 $379.21 $455K 346,836
2021-02-11 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −1,210 $380.63 $461K 345,626
2021-02-11 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −1,400 $382.11 $535K 344,226
2021-02-11 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −100 $383.81 $38K 344,126
2021-02-10 Hsing Michael CEO Sale −1,200 $371.92 $446K 1,109,770
2021-02-10 Hsing Michael CEO Sale −2,300 $372.74 $857K 1,107,470
2021-02-10 Hsing Michael CEO Sale −1,553 $373.92 $581K 1,105,917
2021-02-10 Hsing Michael CEO Sale −3,654 $375.04 $1.4M 1,102,263
2021-02-10 Hsing Michael CEO Sale −4,451 $375.91 $1.7M 1,097,812
2021-02-10 Hsing Michael CEO Sale −4,809 $376.90 $1.8M 1,093,003
2021-02-10 Hsing Michael CEO Sale −1,000 $377.92 $378K 1,092,003
2021-02-10 Hsing Michael CEO Sale −100 $381.68 $38K 1,091,903
2021-02-09 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −409 $366.81 $150K 21,501
2021-02-09 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −1,482 $368.49 $546K 20,019

Page 69 of 72 · 1,433 trades