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Monolithic Power Systems

MPWR Net selling
CIK 0001280452 #321 in the set updated 17 Sep 2026
Bought (120 mo)
$0.00
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$2.23B
$467.91M on a plan · $568.86K straight out of an exercise
Sold at will
$1.76B
1208 of 1776 sales
Net
−$2.23B
−$1.76B against sales at will

By person

13 insiders · 1,776 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
Hsing Michael
CEO
—
$891.58M (375)
−$891.58M
861,088
1.75%
$1.10B
−26.5%
Tseng Saria
EVP & General Counsel
—
$369.62M (227)
−$369.62M
146,218
0.2975%
$187.39M
−46.0%
Sciammas Maurice
EVP, WW Sales & Marketing
—
$329.31M (294)
−$329.31M
162,706
0.3311%
$208.52M
−38.5%
Xiao Deming
EVP, Global Operations
—
$306.32M (165)
−$306.32M
210,295
0.4279%
$269.51M
−20.0%
BLEGEN THEODORE
EVP and CFO
—
$157.74M (483)
−$157.74M
87,684
0.1784%
$112.37M
+105.2%
Moyer James C
Director
—
$130.30M (118)
−$130.30M
348
0.0007%
$445.99K
−100.0%
Elmiger Eugen J
Director
—
$22.41M (15)
−$22.41M
5,402
0.0110%
$6.92M
−59.8%
Zhou Jeff
Director
—
$9.12M (44)
−$9.12M
3,800
0.0077%
$4.87M
−77.6%
CHANG KUO WEI HERBERT
Director
—
$5.15M (35)
−$5.15M
515
0.0010%
$660.01K
−93.7%
Lee Victor K
Director
—
$3.38M (13) scheduled
−$3.38M
27,756
0.0565%
$35.57M
+21.8%
Martinez Carintia
Director
—
$1.26M (1) scheduled
−$1.26M
1,067
0.0022%
$1.37M
—
Wynne Eileen
Director
—
$530.20K (1)
−$530.20K
1,007
0.0020%
$1.29M
—
DEAN ROBERT W II
Interim CFO
—
$233.70K (5)
−$233.70K
7,089
0.0144%
$9.09M
−12.0%

Individual transactions

106
Insider
Date
Role
Action
Shares
Price
Amount
CHANG KUO WEI HERBERT
24 Aug 2026
Director
Sell
50
$1,281.57
$64.08K
DEAN ROBERT W II
24 Aug 2026
Interim CFO
Sell
32
$1,297.72
$41.53K
DEAN ROBERT W II
17 Aug 2026
Interim CFO
Sell
6
$1,413.64
$8.48K
CHANG KUO WEI HERBERT
11 Aug 2026
Director
Sell
50
$1,420.00
$71.00K
DEAN ROBERT W II
5 Aug 2026
Interim CFO
Sell
105
$1,344.27
$141.15K
Tseng Saria
27 May 2026
EVP & General Counsel
Sell
7,565
$1,700.00
$12.86M
Zhou Jeff
26 May 2026
Director
Sell
486
$1,680.00
$816.48K
DEAN ROBERT W II
26 May 2026
Interim CFO
Sell
22
$1,649.56
$36.29K
Tseng Saria
22 May 2026
EVP & General Counsel
Sell
5,000
$1,586.43
$7.93M
DEAN ROBERT W II
18 May 2026
Interim CFO
Sell
4
$1,563.28
$6.25K
Hsing Michael
18 May 2026
CEO
Sell
130
$1,521.43
$197.79K
Hsing Michael
18 May 2026
CEO
Sell
352
$1,518.15
$534.39K
Hsing Michael
18 May 2026
CEO
Sell
551
$1,513.11
$833.72K
Hsing Michael
18 May 2026
CEO
Sell
3,769
$1,507.70
$5.68M
Hsing Michael
18 May 2026
CEO
Sell
2,929
$1,503.05
$4.40M
Hsing Michael
18 May 2026
CEO
Sell
608
$1,499.46
$911.67K
Hsing Michael
18 May 2026
CEO
Sell
862
$1,491.48
$1.29M
Hsing Michael
18 May 2026
CEO
Sell
6,688
$1,486.76
$9.94M
Hsing Michael
18 May 2026
CEO
Sell
5,737
$1,482.51
$8.51M
Hsing Michael
18 May 2026
CEO
Sell
4,082
$1,476.96
$6.03M
Hsing Michael
18 May 2026
CEO
Sell
5,049
$1,472.84
$7.44M
Hsing Michael
18 May 2026
CEO
Sell
5,819
$1,467.62
$8.54M
Hsing Michael
18 May 2026
CEO
Sell
3,424
$1,462.61
$5.01M
Zhou Jeff
6 May 2026
Director
Sell
500
$1,650.00
$825.00K
Wynne Eileen
6 May 2026
Director
Sell
335
$1,582.68
$530.20K
Xiao Deming
6 May 2026
EVP, Global Operations
Sell
907
$1,661.38
$1.51M
Xiao Deming
6 May 2026
EVP, Global Operations
Sell
11,597
$1,657.93
$19.23M
Xiao Deming
6 May 2026
EVP, Global Operations
Sell
14,167
$1,652.80
$23.42M
Xiao Deming
6 May 2026
EVP, Global Operations
Sell
3,329
$1,648.38
$5.49M
Elmiger Eugen J
6 May 2026
Director
Sell
514
$1,600.14
$822.47K
Elmiger Eugen J
6 May 2026
Director
Sell
2,619
$1,596.42
$4.18M
Elmiger Eugen J
6 May 2026
Director
Sell
1,355
$1,591.38
$2.16M
Elmiger Eugen J
6 May 2026
Director
Sell
2,587
$1,586.81
$4.11M
Elmiger Eugen J
6 May 2026
Director
Sell
1,879
$1,581.81
$2.97M
Elmiger Eugen J
6 May 2026
Director
Sell
834
$1,575.57
$1.31M
Elmiger Eugen J
6 May 2026
Director
Sell
1,078
$1,571.58
$1.69M
Elmiger Eugen J
6 May 2026
Director
Sell
814
$1,566.36
$1.28M
Elmiger Eugen J
6 May 2026
Director
Sell
320
$1,559.88
$499.16K
Sciammas Maurice
5 May 2026
EVP, WW Sales & Marketing
Sell indirect
380
$1,583.81
$601.85K
Zhou Jeff
5 May 2026
Director
Sell
500
$1,600.00
$800.00K
Zhou Jeff
5 May 2026
Director
Sell
514
$1,574.48
$809.28K
Sciammas Maurice
11 Feb 2026
EVP, WW Sales & Marketing
Sell indirect
200
$1,179.98
$236.00K
Hsing Michael
6 Feb 2026
CEO
Sell
54,923
$1,171.16
$64.32M
BLEGEN THEODORE
6 Feb 2026
EVP and CFO
Sell
21,725
$1,171.16
$25.44M
Sciammas Maurice
6 Feb 2026
EVP, WW Sales & Marketing
Sell
22,875
$1,171.16
$26.79M
Tseng Saria
6 Feb 2026
EVP & General Counsel
Sell
22,875
$1,171.16
$26.79M
Xiao Deming
6 Feb 2026
EVP, Global Operations
Sell
22,875
$1,171.16
$26.79M
Tseng Saria
26 Nov 2025
EVP & General Counsel
Sell
680
$930.48
$632.73K
Tseng Saria
26 Nov 2025
EVP & General Counsel
Sell
2,238
$929.29
$2.08M
Tseng Saria
26 Nov 2025
EVP & General Counsel
Sell
984
$928.60
$913.74K
Tseng Saria
26 Nov 2025
EVP & General Counsel
Sell
1,845
$927.41
$1.71M
Tseng Saria
26 Nov 2025
EVP & General Counsel
Sell
10,360
$926.02
$9.59M
Tseng Saria
26 Nov 2025
EVP & General Counsel
Sell
1,126
$925.55
$1.04M
Tseng Saria
26 Nov 2025
EVP & General Counsel
Sell
1,327
$924.32
$1.23M
Tseng Saria
26 Nov 2025
EVP & General Counsel
Sell
1,200
$923.54
$1.11M
Tseng Saria
26 Nov 2025
EVP & General Counsel
Sell
240
$922.78
$221.47K
CHANG KUO WEI HERBERT
25 Nov 2025
Director
Sell
100
$896.97
$89.70K
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
240
$912.30
$218.95K
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
324
$911.92
$295.46K
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
359
$910.42
$326.84K
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
556
$909.35
$505.60K
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
888
$908.49
$806.74K
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
10,200
$907.21
$9.25M
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
272
$906.33
$246.52K
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
160
$905.32
$144.85K
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
200
$904.39
$180.88K
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
160
$903.54
$144.57K
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
120
$902.07
$108.25K
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
880
$901.58
$793.39K
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
346
$900.41
$311.54K
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
320
$899.37
$287.80K
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
145
$898.38
$130.27K
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
754
$897.54
$676.75K
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
2,066
$896.37
$1.85M
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
1,625
$895.63
$1.46M
Tseng Saria
25 Nov 2025
EVP & General Counsel
Sell
385
$894.54
$344.40K
Sciammas Maurice
24 Nov 2025
EVP, WW Sales & Marketing
Sell
3,976
$895.23
$3.56M
CHANG KUO WEI HERBERT
21 Nov 2025
Director
Sell
100
$873.97
$87.40K
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
731
$874.50
$639.26K
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
1,146
$873.78
$1.00M
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
574
$872.80
$500.99K
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
220
$871.45
$191.72K
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
320
$870.36
$278.52K
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
1,842
$869.39
$1.60M
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
723
$868.42
$627.87K
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
699
$867.57
$606.43K
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
339
$866.19
$293.64K
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
40
$865.89
$34.64K
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
160
$863.86
$138.22K
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
240
$862.58
$207.02K
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
810
$886.01
$717.67K
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
1,738
$885.10
$1.54M
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
2,149
$884.44
$1.90M
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
6,513
$883.50
$5.75M
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
3,344
$882.51
$2.95M
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
2,469
$881.42
$2.18M
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
3,776
$880.58
$3.33M
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
1,966
$879.54
$1.73M
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
1,854
$878.55
$1.63M
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
1,976
$877.45
$1.73M
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
940
$876.62
$824.02K
Sciammas Maurice
19 Nov 2025
EVP, WW Sales & Marketing
Sell
431
$875.26
$377.24K
Hsing Michael
12 Nov 2025
CEO
Sell
987
$980.06
$967.32K
Hsing Michael
12 Nov 2025
CEO
Sell
633
$979.59
$620.08K
Hsing Michael
12 Nov 2025
CEO
Sell
298
$973.73
$290.17K
Hsing Michael
12 Nov 2025
CEO
Sell
461
$972.78
$448.45K
Showing 250 of 1,776 transactions. The figures above use every one of them.

What was left out

Form 4 filings counted 913
Amendments (4/A) skipped 1
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 564
Sales straight out of an exercise 4
Sales at will 1,208
Transactions with no price 0
Shares from compensation/vesting 6,462,852
Sales filed before the plan box existed 933
History held since 30 Aug 2016