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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
2021-05-14 Sciammas Maurice Sr. V.P.of Sales and Marketing Gift +9,015 23,015
2021-05-14 Sciammas Maurice Sr. V.P.of Sales and Marketing Gift −14,000 306,331
2021-05-14 Sciammas Maurice Sr. V.P.of Sales and Marketing Gift +14,000 14,000
2021-05-12 Hsing Michael CEO Sale −6,723 $311.82 $2.1M 1,011,650
2021-05-12 Tseng Saria VP & General Counsel Sale −1,741 $311.82 $543K 266,870
2021-05-12 Xiao Deming Pres. of MPS Asia Operations Sale −1,741 $311.83 $543K 323,549
2021-05-12 BLEGEN THEODORE CFO Sale −1,437 $311.82 $448K 153,106
2021-05-12 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −1,741 $311.82 $543K 320,331
2021-05-10 Tseng Saria VP & General Counsel Sale −2,196 $326.41 $717K 268,611
2021-05-10 Sciammas Maurice Sr. V.P.of Sales and Marketing Sale −1,233 $326.41 $402K 322,072
2021-05-10 Hsing Michael CEO Sale −8,479 $326.40 $2.8M 1,018,373
2021-05-10 BLEGEN THEODORE CFO Sale −1,562 $326.40 $510K 154,543
2021-05-10 Xiao Deming Pres. of MPS Asia Operations Sale −2,196 $326.41 $717K 325,290
2021-04-22 Xiao Deming Pres. of MPS Asia Operations Grant or award +2,895 $30.00 $87K 327,437
2021-04-22 Sciammas Maurice Sr. V.P.of Sales and Marketing Grant or award +2,895 $30.00 $87K 323,305
2021-04-22 Hsing Michael CEO Grant or award +9,403 $30.00 $282K 1,026,852
2021-04-22 BLEGEN THEODORE CFO Grant or award +1,905 $30.00 $57K 156,105
2021-04-22 Tseng Saria VP & General Counsel Grant or award +2,895 $30.00 $87K 270,751
2021-04-20 BLEGEN THEODORE CFO Sale −180 $362.51 $65K 155,917
2021-04-20 BLEGEN THEODORE CFO Sale −606 $363.50 $220K 155,311

Page 64 of 72 · 1,433 trades