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Monolithic Power Systems

MPWR Net selling
CIK 0001280452 #321 in the set updated 17 Sep 2026
Bought (12 mo)
$0.00
out of their own pocket, the only kind of buying there is
Sold (12 mo)
$723.21M
$253.94M on a plan · $0.00 straight out of an exercise
Sold at will
$469.27M
139 of 324 sales
Net
−$723.21M
−$469.27M against sales at will

By person

12 insiders · 324 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
Hsing Michael
CEO
$314.44M (81)
−$314.44M
848,263
1.73%
$1.09B
−1.5%
Tseng Saria
EVP & General Counsel
$164.17M (67)
−$164.17M
146,218
0.2975%
$187.39M
−9.5%
Sciammas Maurice
EVP, WW Sales & Marketing
$101.39M (61)
−$101.39M
162,706
0.3311%
$208.52M
+2.1%
Xiao Deming
EVP, Global Operations
$76.43M (5)
−$76.43M
210,295
0.4279%
$269.51M
+26.3%
BLEGEN THEODORE
EVP and CFO
$40.19M (78)
−$40.19M
82,353
0.1676%
$105.54M
+33.5%
Elmiger Eugen J
Director
$19.02M (9)
−$19.02M
5,402
0.0110%
$6.92M
−74.1%
Zhou Jeff
Director
$3.25M (4)
−$3.25M
3,800
0.0077%
$4.87M
−37.4%
Lee Victor K
Director
$2.00M (8) scheduled
−$2.00M
27,756
0.0565%
$35.57M
−5.0%
Martinez Carintia
Director
$1.26M (1) scheduled
−$1.26M
1,067
0.0022%
$1.37M
−45.1%
Wynne Eileen
Director
$530.20K (1)
−$530.20K
1,007
0.0020%
$1.29M
+23.1%
CHANG KUO WEI HERBERT
Director
$312.17K (4)
−$312.17K
515
0.0010%
$660.01K
−4.8%
DEAN ROBERT W II
Interim CFO
$233.70K (5)
−$233.70K
7,089
0.0144%
$9.09M
−12.0%
Insider
Date
Role
Action
Shares
Price
Amount
Sciammas Maurice
3 Aug 2026
EVP, WW Sales & Marketing
Sold on a plan indirect
30
$1,343.94
$40.32K
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
110
$1,405.71
$154.63K
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
117
$1,400.45
$163.85K
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
213
$1,396.16
$297.38K
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
50
$1,388.19
$69.41K
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
410
$1,384.11
$567.49K
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
418
$1,378.73
$576.31K
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
472
$1,375.47
$649.22K
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
240
$1,369.18
$328.60K
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
50
$1,359.36
$67.97K
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
5,640
$1,352.95
$7.63M
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
1,506
$1,348.91
$2.03M
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
1,864
$1,344.16
$2.51M
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
1,460
$1,339.59
$1.96M
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
776
$1,334.59
$1.04M
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
464
$1,329.30
$616.80K
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
409
$1,323.93
$541.49K
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
274
$1,318.42
$361.25K
Sciammas Maurice
15 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan
527
$1,314.03
$692.49K
Sciammas Maurice
1 Jul 2026
EVP, WW Sales & Marketing
Sold on a plan indirect
30
$1,351.61
$40.55K
Sciammas Maurice
1 Jun 2026
EVP, WW Sales & Marketing
Sold on a plan indirect
30
$1,533.95
$46.02K
Sciammas Maurice
15 May 2026
EVP, WW Sales & Marketing
Sold on a plan
50
$1,585.51
$79.28K
Sciammas Maurice
15 May 2026
EVP, WW Sales & Marketing
Sold on a plan
447
$1,582.21
$707.25K
Sciammas Maurice
15 May 2026
EVP, WW Sales & Marketing
Sold on a plan
703
$1,577.75
$1.11M
Sciammas Maurice
15 May 2026
EVP, WW Sales & Marketing
Sold on a plan
1,312
$1,571.49
$2.06M
Sciammas Maurice
15 May 2026
EVP, WW Sales & Marketing
Sold on a plan
2,020
$1,567.15
$3.17M
Sciammas Maurice
15 May 2026
EVP, WW Sales & Marketing
Sold on a plan
2,010
$1,562.01
$3.14M
Sciammas Maurice
15 May 2026
EVP, WW Sales & Marketing
Sold on a plan
1,717
$1,557.48
$2.67M
Sciammas Maurice
15 May 2026
EVP, WW Sales & Marketing
Sold on a plan
3,741
$1,550.36
$5.80M
Sciammas Maurice
4 May 2026
EVP, WW Sales & Marketing
Sold on a plan indirect
30
$1,588.73
$47.66K
Tseng Saria
8 Apr 2026
EVP & General Counsel
Sold on a plan
120
$1,321.94
$158.63K
Tseng Saria
8 Apr 2026
EVP & General Counsel
Sold on a plan
840
$1,319.25
$1.11M
Tseng Saria
8 Apr 2026
EVP & General Counsel
Sold on a plan
4,244
$1,312.82
$5.57M
Tseng Saria
8 Apr 2026
EVP & General Counsel
Sold on a plan
1,279
$1,308.30
$1.67M
Tseng Saria
8 Apr 2026
EVP & General Counsel
Sold on a plan
800
$1,302.52
$1.04M
Tseng Saria
8 Apr 2026
EVP & General Counsel
Sold on a plan
400
$1,292.08
$516.83K
Tseng Saria
8 Apr 2026
EVP & General Counsel
Sold on a plan
120
$1,287.12
$154.45K
Tseng Saria
8 Apr 2026
EVP & General Counsel
Sold on a plan
240
$1,279.55
$307.09K
Tseng Saria
8 Apr 2026
EVP & General Counsel
Sold on a plan
360
$1,270.29
$457.30K
Tseng Saria
8 Apr 2026
EVP & General Counsel
Sold on a plan
560
$1,266.48
$709.23K
Tseng Saria
6 Apr 2026
EVP & General Counsel
Sold on a plan
1,396
$1,179.50
$1.65M
Tseng Saria
6 Apr 2026
EVP & General Counsel
Sold on a plan
1,680
$1,176.35
$1.98M
Tseng Saria
6 Apr 2026
EVP & General Counsel
Sold on a plan
2,036
$1,170.38
$2.38M
Tseng Saria
6 Apr 2026
EVP & General Counsel
Sold on a plan
684
$1,165.66
$797.31K
Tseng Saria
6 Apr 2026
EVP & General Counsel
Sold on a plan
560
$1,159.62
$649.39K
Tseng Saria
6 Apr 2026
EVP & General Counsel
Sold on a plan
480
$1,149.05
$551.54K
Tseng Saria
6 Apr 2026
EVP & General Counsel
Sold on a plan
556
$1,144.42
$636.30K
Tseng Saria
6 Apr 2026
EVP & General Counsel
Sold on a plan
244
$1,139.96
$278.15K
Sciammas Maurice
1 Apr 2026
EVP, WW Sales & Marketing
Sold on a plan indirect
30
$1,116.44
$33.49K
Tseng Saria
1 Apr 2026
EVP & General Counsel
Sold on a plan
292
$1,136.99
$332.00K
Tseng Saria
1 Apr 2026
EVP & General Counsel
Sold on a plan
188
$1,135.91
$213.55K
Tseng Saria
1 Apr 2026
EVP & General Counsel
Sold on a plan
160
$1,134.14
$181.46K
Tseng Saria
1 Apr 2026
EVP & General Counsel
Sold on a plan
184
$1,132.15
$208.32K
Tseng Saria
1 Apr 2026
EVP & General Counsel
Sold on a plan
576
$1,131.24
$651.59K
Tseng Saria
30 Mar 2026
EVP & General Counsel
Sold on a plan
80
$1,041.12
$83.29K
Tseng Saria
30 Mar 2026
EVP & General Counsel
Sold on a plan
166
$1,035.60
$171.91K
Tseng Saria
30 Mar 2026
EVP & General Counsel
Sold on a plan
2,440
$1,029.21
$2.51M
Tseng Saria
30 Mar 2026
EVP & General Counsel
Sold on a plan
2,200
$1,023.00
$2.25M
Tseng Saria
30 Mar 2026
EVP & General Counsel
Sold on a plan
3,194
$1,017.22
$3.25M
Tseng Saria
30 Mar 2026
EVP & General Counsel
Sold on a plan
3,360
$1,009.63
$3.39M
Tseng Saria
30 Mar 2026
EVP & General Counsel
Sold on a plan
9,080
$1,005.18
$9.13M
Tseng Saria
30 Mar 2026
EVP & General Counsel
Sold on a plan
5,154
$1,000.81
$5.16M
Sciammas Maurice
20 Mar 2026
EVP, WW Sales & Marketing
Sold on a plan indirect
30
$1,095.07
$32.85K
Hsing Michael
12 Feb 2026
CEO
Sold on a plan
1,440
$1,217.12
$1.75M
Hsing Michael
12 Feb 2026
CEO
Sold on a plan
1,240
$1,210.11
$1.50M
Hsing Michael
12 Feb 2026
CEO
Sold on a plan
3,640
$1,205.82
$4.39M
Hsing Michael
12 Feb 2026
CEO
Sold on a plan
1,440
$1,200.81
$1.73M
Hsing Michael
12 Feb 2026
CEO
Sold on a plan
600
$1,194.34
$716.60K
Hsing Michael
12 Feb 2026
CEO
Sold on a plan
160
$1,188.23
$190.12K
Hsing Michael
12 Feb 2026
CEO
Sold on a plan
480
$1,180.79
$566.78K
Hsing Michael
12 Feb 2026
CEO
Sold on a plan
200
$1,173.39
$234.68K
Hsing Michael
12 Feb 2026
CEO
Sold on a plan
2,076
$1,168.80
$2.43M
Hsing Michael
12 Feb 2026
CEO
Sold on a plan
4,001
$1,164.92
$4.66M
Hsing Michael
12 Feb 2026
CEO
Sold on a plan
4,992
$1,159.84
$5.79M
Hsing Michael
12 Feb 2026
CEO
Sold on a plan
12,731
$1,155.71
$14.71M
Hsing Michael
11 Feb 2026
CEO
Sold on a plan
649
$1,202.28
$780.28K
Hsing Michael
11 Feb 2026
CEO
Sold on a plan
14,578
$1,197.20
$17.45M
Hsing Michael
11 Feb 2026
CEO
Sold on a plan
6,079
$1,192.67
$7.25M
Hsing Michael
11 Feb 2026
CEO
Sold on a plan
2,104
$1,188.17
$2.50M
Hsing Michael
11 Feb 2026
CEO
Sold on a plan
1,542
$1,182.82
$1.82M
Hsing Michael
11 Feb 2026
CEO
Sold on a plan
2,799
$1,177.67
$3.30M
Hsing Michael
11 Feb 2026
CEO
Sold on a plan
1,987
$1,172.92
$2.33M
Hsing Michael
11 Feb 2026
CEO
Sold on a plan
1,533
$1,167.62
$1.79M
Hsing Michael
11 Feb 2026
CEO
Sold on a plan
1,366
$1,163.71
$1.59M
Hsing Michael
11 Feb 2026
CEO
Sold on a plan
363
$1,158.71
$420.61K
Hsing Michael
10 Feb 2026
CEO
Sold on a plan
280
$1,197.26
$335.23K
Hsing Michael
10 Feb 2026
CEO
Sold on a plan
880
$1,176.04
$1.03M
Hsing Michael
10 Feb 2026
CEO
Sold on a plan
360
$1,161.41
$418.11K
Hsing Michael
10 Feb 2026
CEO
Sold on a plan
694
$1,154.96
$801.54K
Hsing Michael
10 Feb 2026
CEO
Sold on a plan
1,215
$1,151.11
$1.40M
Hsing Michael
10 Feb 2026
CEO
Sold on a plan
3,864
$1,145.90
$4.43M
Hsing Michael
10 Feb 2026
CEO
Sold on a plan
16,080
$1,141.88
$18.36M
Hsing Michael
10 Feb 2026
CEO
Sold on a plan
6,325
$1,136.75
$7.19M
Hsing Michael
10 Feb 2026
CEO
Sold on a plan
4,302
$1,132.01
$4.87M
Lee Victor K
9 Feb 2026
Director
Sold on a plan
400
$1,212.16
$484.86K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
80
$1,139.49
$91.16K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
80
$1,137.81
$91.02K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
120
$1,136.35
$136.36K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
120
$1,135.49
$136.26K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
241
$1,134.41
$273.39K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
379
$1,133.47
$429.59K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
322
$1,132.67
$364.72K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
198
$1,131.70
$224.08K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
320
$1,130.48
$361.75K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
240
$1,129.28
$271.03K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
240
$1,128.43
$270.82K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
80
$1,127.39
$90.19K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
200
$1,126.58
$225.32K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
40
$1,122.56
$44.90K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
80
$1,120.77
$89.66K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
40
$1,117.11
$44.68K
BLEGEN THEODORE
2 Feb 2026
EVP and CFO
Sold on a plan
220
$1,110.58
$244.33K
BLEGEN THEODORE
2 Jan 2026
EVP and CFO
Sold on a plan
80
$946.62
$75.73K
BLEGEN THEODORE
2 Jan 2026
EVP and CFO
Sold on a plan
40
$945.00
$37.80K
BLEGEN THEODORE
2 Jan 2026
EVP and CFO
Sold on a plan
650
$944.35
$613.83K
BLEGEN THEODORE
2 Jan 2026
EVP and CFO
Sold on a plan
539
$943.71
$508.66K
BLEGEN THEODORE
2 Jan 2026
EVP and CFO
Sold on a plan
74
$942.42
$69.74K
BLEGEN THEODORE
2 Jan 2026
EVP and CFO
Sold on a plan
406
$941.60
$382.29K
BLEGEN THEODORE
2 Jan 2026
EVP and CFO
Sold on a plan
40
$940.03
$37.60K
BLEGEN THEODORE
2 Jan 2026
EVP and CFO
Sold on a plan
117
$939.75
$109.95K
BLEGEN THEODORE
2 Jan 2026
EVP and CFO
Sold on a plan
460
$938.52
$431.72K
BLEGEN THEODORE
2 Jan 2026
EVP and CFO
Sold on a plan
120
$936.50
$112.38K
BLEGEN THEODORE
2 Jan 2026
EVP and CFO
Sold on a plan
80
$935.33
$74.83K
BLEGEN THEODORE
2 Jan 2026
EVP and CFO
Sold on a plan
40
$934.74
$37.39K
BLEGEN THEODORE
2 Jan 2026
EVP and CFO
Sold on a plan
80
$933.64
$74.69K
BLEGEN THEODORE
2 Jan 2026
EVP and CFO
Sold on a plan
194
$930.86
$180.59K
BLEGEN THEODORE
2 Jan 2026
EVP and CFO
Sold on a plan
80
$927.61
$74.21K
Lee Victor K
2 Jan 2026
Director
Sold on a plan
600
$930.86
$558.52K
Lee Victor K
24 Dec 2025
Director
Sold on a plan
80
$955.08
$76.41K
Lee Victor K
24 Dec 2025
Director
Sold on a plan
200
$953.70
$190.74K
Lee Victor K
24 Dec 2025
Director
Sold on a plan
83
$952.37
$79.05K
Lee Victor K
24 Dec 2025
Director
Sold on a plan
160
$951.60
$152.26K
Lee Victor K
24 Dec 2025
Director
Sold on a plan
280
$950.64
$266.18K
Lee Victor K
24 Dec 2025
Director
Sold on a plan
197
$949.70
$187.09K
BLEGEN THEODORE
1 Dec 2025
EVP and CFO
Sold on a plan
56
$911.59
$51.05K
BLEGEN THEODORE
1 Dec 2025
EVP and CFO
Sold on a plan
1,984
$909.00
$1.80M
BLEGEN THEODORE
1 Dec 2025
EVP and CFO
Sold on a plan
480
$908.69
$436.17K
BLEGEN THEODORE
1 Dec 2025
EVP and CFO
Sold on a plan
80
$907.59
$72.61K
BLEGEN THEODORE
1 Dec 2025
EVP and CFO
Sold on a plan
80
$906.84
$72.55K
BLEGEN THEODORE
1 Dec 2025
EVP and CFO
Sold on a plan
120
$904.38
$108.53K
BLEGEN THEODORE
1 Dec 2025
EVP and CFO
Sold on a plan
40
$902.31
$36.09K
BLEGEN THEODORE
1 Dec 2025
EVP and CFO
Sold on a plan
80
$901.88
$72.15K
BLEGEN THEODORE
1 Dec 2025
EVP and CFO
Sold on a plan
40
$900.88
$36.04K
BLEGEN THEODORE
1 Dec 2025
EVP and CFO
Sold on a plan
40
$899.73
$35.99K
Showing 250 of 324 transactions. The figures above use every one of them.

What was left out

Form 4 filings counted 89
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 185
Sales straight out of an exercise 0
Sales at will 139
Transactions with no price 0
Shares from compensation/vesting 1,575,944
History held since 30 Aug 2016