MPWR
insider transactionsMONOLITHIC POWER SYSTEMS INC — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Net shares · 365d
-405.6K
0 buy · 405.6K sell
Net value · 365d
-$514.6M
$0 in · $514.6M out
Sentiment · 365d
Net selling
0% buying · 100% selling
Open-market trades · 365d
150
0 buy · 405.6K sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
-
Sell·S
EVP, WW Sales & Marketing · 10b5-1
$46.0K
30 sh · $1,533.95
Own -2%
-
Other·G
EVP, WW Sales & Marketing
$0
12.5K sh
Own -50%
-
Sell·S
EVP & General Counsel
$12.9M
7.6K sh · $1,700.00
Own -5%
-
Sell·S
Director
$816.5K
486 sh · $1,680.00
Own -11%
-
Sell·S
Robert W Dean II KEY
Interim CFO
$36.3K
22 sh · $1,649.56
Own -0%
-
Sell·S
EVP & General Counsel
$7.9M
5.0K sh · $1,586.43
Own -3%
-
Other·G
EVP & General Counsel
$0
200 sh
Own -0%
-
Sell·S
Michael Hsing KEY
CEO
$197.8K
130 sh · $1,521.43
Own -0%
-
Sell·S
Michael Hsing KEY
CEO
$534.4K
352 sh · $1,518.15
Own -0%
-
Sell·S
Michael Hsing KEY
CEO
$833.7K
551 sh · $1,513.11
Own -0%
-
Sell·S
Michael Hsing KEY
CEO
$5.7M
3.8K sh · $1,507.70
Own -0%
-
Sell·S
Michael Hsing KEY
CEO
$4.4M
2.9K sh · $1,503.05
Own -0%
-
Sell·S
Michael Hsing KEY
CEO
$911.7K
608 sh · $1,499.46
Own -0%
-
Sell·S
Michael Hsing KEY
CEO
$1.3M
862 sh · $1,491.48
Own -0%
-
Sell·S
Michael Hsing KEY
CEO
$9.9M
6.7K sh · $1,486.76
Own -1%
-
Sell·S
Michael Hsing KEY
CEO
$8.5M
5.7K sh · $1,482.51
Own -1%
-
Sell·S
Michael Hsing KEY
CEO
$6.0M
4.1K sh · $1,476.96
Own -0%
-
Sell·S
Michael Hsing KEY
CEO
$7.4M
5.0K sh · $1,472.84
Own -1%
-
Sell·S
Michael Hsing KEY
CEO
$8.5M
5.8K sh · $1,467.62
Own -1%
-
Sell·S
Michael Hsing KEY
CEO
$5.0M
3.4K sh · $1,462.61
Own -0%
-
Sell·S
Robert W Dean II KEY
Interim CFO
$6.3K
4 sh · $1,563.28
Own -0%
-
Sell·S
EVP, WW Sales & Marketing · 10b5-1
$79.3K
50 sh · $1,585.51
Own -0%
-
Sell·S
EVP, WW Sales & Marketing · 10b5-1
$707.2K
447 sh · $1,582.21
Own -0%
-
Sell·S
EVP, WW Sales & Marketing · 10b5-1
$1.1M
703 sh · $1,577.75
Own -0%
-
Sell·S
EVP, WW Sales & Marketing · 10b5-1
$2.1M
1.3K sh · $1,571.49
Own -1%
-
Sell·S
EVP, WW Sales & Marketing · 10b5-1
$3.2M
2.0K sh · $1,567.15
Own -1%
-
Sell·S
EVP, WW Sales & Marketing · 10b5-1
$3.1M
2.0K sh · $1,562.01
Own -1%
-
Sell·S
EVP, WW Sales & Marketing · 10b5-1
$2.7M
1.7K sh · $1,557.48
Own -1%
-
Sell·S
EVP, WW Sales & Marketing · 10b5-1
$5.8M
3.7K sh · $1,550.36
Own -2%
-
Other·G
EVP, WW Sales & Marketing
$0
1.6K sh
Own -6%
-
Other·J
Robert W Dean II KEY
Interim CFO
$0
2.2K sh
-
Sell·S
Director
$825.0K
500 sh · $1,650.00
Own -10%
-
Sell·S
EVP, Global Operations
$1.5M
907 sh · $1,661.38
Own -0%
-
Sell·S
EVP, Global Operations
$19.2M
11.6K sh · $1,657.93
Own -5%
-
Sell·S
EVP, Global Operations
$23.4M
14.2K sh · $1,652.80
Own -6%
-
Sell·S
EVP, Global Operations
$5.5M
3.3K sh · $1,648.38
Own -1%
-
Sell·S
Director
$530.2K
335 sh · $1,582.68
Own -25%
-
Sell·S
Director
$822.5K
514 sh · $1,600.14
Own -9%
-
Sell·S
Director
$4.2M
2.6K sh · $1,596.42
Own -31%
-
Sell·S
Director
$2.2M
1.4K sh · $1,591.38
Own -14%
-
Sell·S
Director
$4.1M
2.6K sh · $1,586.81
Own -21%
-
Sell·S
Director
$3.0M
1.9K sh · $1,581.81
Own -13%
-
Sell·S
Director
$1.3M
834 sh · $1,575.57
Own -5%
-
Sell·S
Director
$1.7M
1.1K sh · $1,571.58
Own -7%
-
Sell·S
Director
$1.3M
814 sh · $1,566.36
Own -5%
-
Sell·S
Director
$499.2K
320 sh · $1,559.88
Own -2%
-
Sell·S
Director
$800.0K
500 sh · $1,600.00
Own -9%
-
Sell·S
Director
$809.3K
514 sh · $1,574.48
Own -9%
-
Sell·S
EVP, WW Sales & Marketing
$601.8K
380 sh · $1,583.81
Own -29%
-
Sell·S
EVP, WW Sales & Marketing · 10b5-1
$47.7K
30 sh · $1,588.73
Own -2%
-
Sell·S
EVP & General Counsel · 10b5-1
$158.6K
120 sh · $1,321.94
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$1.1M
840 sh · $1,319.25
Own -1%
-
Sell·S
EVP & General Counsel · 10b5-1
$5.6M
4.2K sh · $1,312.82
Own -3%
-
Sell·S
EVP & General Counsel · 10b5-1
$1.7M
1.3K sh · $1,308.30
Own -1%
-
Sell·S
EVP & General Counsel · 10b5-1
$1.0M
800 sh · $1,302.52
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$516.8K
400 sh · $1,292.08
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$154.5K
120 sh · $1,287.12
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$307.1K
240 sh · $1,279.55
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$457.3K
360 sh · $1,270.29
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$709.2K
560 sh · $1,266.48
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$1.6M
1.4K sh · $1,179.50
Own -1%
-
Sell·S
EVP & General Counsel · 10b5-1
$2.0M
1.7K sh · $1,176.35
Own -1%
-
Sell·S
EVP & General Counsel · 10b5-1
$2.4M
2.0K sh · $1,170.38
Own -1%
-
Sell·S
EVP & General Counsel · 10b5-1
$797.3K
684 sh · $1,165.66
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$649.4K
560 sh · $1,159.62
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$551.5K
480 sh · $1,149.05
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$636.3K
556 sh · $1,144.42
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$278.2K
244 sh · $1,139.96
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$332.0K
292 sh · $1,136.99
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$213.6K
188 sh · $1,135.91
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$181.5K
160 sh · $1,134.14
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$208.3K
184 sh · $1,132.15
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$651.6K
576 sh · $1,131.24
Own -0%
-
Sell·S
EVP, WW Sales & Marketing · 10b5-1
$33.5K
30 sh · $1,116.44
Own -2%
-
Sell·S
EVP & General Counsel · 10b5-1
$83.3K
80 sh · $1,041.12
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$171.9K
166 sh · $1,035.60
Own -0%
-
Sell·S
EVP & General Counsel · 10b5-1
$2.5M
2.4K sh · $1,029.21
Own -1%
-
Sell·S
EVP & General Counsel · 10b5-1
$2.3M
2.2K sh · $1,023.00
Own -1%
-
Sell·S
EVP & General Counsel · 10b5-1
$3.2M
3.2K sh · $1,017.22
Own -2%
-
Sell·S
EVP & General Counsel · 10b5-1
$3.4M
3.4K sh · $1,009.63
Own -2%
-
Sell·S
EVP & General Counsel · 10b5-1
$9.1M
9.1K sh · $1,005.18
Own -5%
-
Sell·S
EVP & General Counsel · 10b5-1
$5.2M
5.2K sh · $1,000.81
Own -3%
-
Sell·S
EVP, WW Sales & Marketing · 10b5-1
$32.9K
30 sh · $1,095.07
Own -2%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$1.8M
1.4K sh · $1,217.12
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$1.5M
1.2K sh · $1,210.11
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$4.4M
3.6K sh · $1,205.82
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$1.7M
1.4K sh · $1,200.81
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$716.6K
600 sh · $1,194.34
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$190.1K
160 sh · $1,188.23
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$566.8K
480 sh · $1,180.79
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$234.7K
200 sh · $1,173.39
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$2.4M
2.1K sh · $1,168.80
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$4.7M
4.0K sh · $1,164.92
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$5.8M
5.0K sh · $1,159.84
Own -1%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$14.7M
12.7K sh · $1,155.71
Own -1%
-
Sell·S
EVP, WW Sales & Marketing
$236.0K
200 sh · $1,179.98
Own -13%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$780.3K
649 sh · $1,202.28
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$17.5M
14.6K sh · $1,197.20
Own -2%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$7.3M
6.1K sh · $1,192.67
Own -1%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$2.5M
2.1K sh · $1,188.17
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$1.8M
1.5K sh · $1,182.82
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$3.3M
2.8K sh · $1,177.67
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$2.3M
2.0K sh · $1,172.92
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$1.8M
1.5K sh · $1,167.62
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$1.6M
1.4K sh · $1,163.71
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$420.6K
363 sh · $1,158.71
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$335.2K
280 sh · $1,197.26
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$1.0M
880 sh · $1,176.04
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$418.1K
360 sh · $1,161.41
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$801.5K
694 sh · $1,154.96
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$1.4M
1.2K sh · $1,151.11
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$4.4M
3.9K sh · $1,145.90
Own -0%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$18.4M
16.1K sh · $1,141.88
Own -2%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$7.2M
6.3K sh · $1,136.75
Own -1%
-
Sell·S
Michael Hsing KEY
CEO · 10b5-1
$4.9M
4.3K sh · $1,132.01
Own -0%
-
Sell·S
Director · 10b5-1
$484.9K
400 sh · $1,212.16
Own -1%
-
Sell·S
EVP, Global Operations
$26.8M
22.9K sh · $1,171.16
Own -9%
-
Sell·S
EVP & General Counsel
$26.8M
22.9K sh · $1,171.16
Own -10%
-
Sell·S
EVP, WW Sales & Marketing
$26.8M
22.9K sh · $1,171.16
Own -11%
-
Sell·S
Michael Hsing KEY
CEO
$64.3M
54.9K sh · $1,171.16
Own -5%
-
Sell·S
Theodore Blegen KEY
EVP and CFO
$25.4M
21.7K sh · $1,171.16
Own -21%
-
Grant·A
Director
$0
189 sh
Own +16%
-
Grant·A
Director
$0
189 sh
Own +3%
-
Grant·A
Director
$0
189 sh
Own +22%
-
Grant·A
EVP, Global Operations
$0
57.2K sh
Own +28%
-
Grant·A
EVP & General Counsel
$0
57.2K sh
Own +34%
-
Grant·A
EVP, WW Sales & Marketing
$0
57.2K sh
Own +40%
-
Grant·A
Director
$0
189 sh
Own +1%
-
Grant·A
Michael Hsing KEY
CEO
$0
136.8K sh
Own +15%
-
Grant·A
Director
$0
189 sh
Own +1%
-
Grant·A
Director
$0
189 sh
Own +44%
-
Grant·A
Theodore Blegen KEY
EVP and CFO
$0
38.7K sh
Own +59%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$91.2K
80 sh · $1,139.49
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$91.0K
80 sh · $1,137.81
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$136.4K
120 sh · $1,136.35
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$136.3K
120 sh · $1,135.49
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$273.4K
241 sh · $1,134.41
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$429.6K
379 sh · $1,133.47
Own -1%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$364.7K
322 sh · $1,132.67
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$224.1K
198 sh · $1,131.70
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$361.8K
320 sh · $1,130.48
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$271.0K
240 sh · $1,129.28
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$270.8K
240 sh · $1,128.43
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$90.2K
80 sh · $1,127.39
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$225.3K
200 sh · $1,126.58
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$44.9K
40 sh · $1,122.56
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$89.7K
80 sh · $1,120.77
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$44.7K
40 sh · $1,117.11
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$244.3K
220 sh · $1,110.58
Own -0%
-
Sell·S
Director · 10b5-1
$558.5K
600 sh · $930.86
Own -2%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$75.7K
80 sh · $946.62
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$37.8K
40 sh · $945.00
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$613.8K
650 sh · $944.35
Own -1%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$508.7K
539 sh · $943.71
Own -1%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$69.7K
74 sh · $942.42
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$382.3K
406 sh · $941.60
Own -1%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$37.6K
40 sh · $940.03
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$110.0K
117 sh · $939.75
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$431.7K
460 sh · $938.52
Own -1%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$112.4K
120 sh · $936.50
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$74.8K
80 sh · $935.33
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$37.4K
40 sh · $934.74
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$74.7K
80 sh · $933.64
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$180.6K
194 sh · $930.86
Own -0%
-
Sell·S
Theodore Blegen KEY
EVP and CFO · 10b5-1
$74.2K
80 sh · $927.61
Own -0%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 1, 2026 | Maurice Sciammas 10b5-1 | Sell S | 30 | $46.0K |
| May 29, 2026 | Maurice Sciammas | Other G | 12.5K | $0 |
| May 27, 2026 | Saria Tseng | Sell S | 7.6K | $12.9M |
| May 26, 2026 | Jeff Zhou | Sell S | 486 | $816.5K |
| May 26, 2026 | Robert W Dean II KEY | Sell S | 22 | $36.3K |
| May 22, 2026 | Saria Tseng | Sell S | 5.0K | $7.9M |
| May 22, 2026 | Saria Tseng | Other G | 200 | $0 |
| May 18, 2026 | Michael Hsing KEY | Sell S | 130 | $197.8K |
| May 18, 2026 | Michael Hsing KEY | Sell S | 352 | $534.4K |
| May 18, 2026 | Michael Hsing KEY | Sell S | 551 | $833.7K |
| May 18, 2026 | Michael Hsing KEY | Sell S | 3.8K | $5.7M |
| May 18, 2026 | Michael Hsing KEY | Sell S | 2.9K | $4.4M |
| May 18, 2026 | Michael Hsing KEY | Sell S | 608 | $911.7K |
| May 18, 2026 | Michael Hsing KEY | Sell S | 862 | $1.3M |
| May 18, 2026 | Michael Hsing KEY | Sell S | 6.7K | $9.9M |
| May 18, 2026 | Michael Hsing KEY | Sell S | 5.7K | $8.5M |
| May 18, 2026 | Michael Hsing KEY | Sell S | 4.1K | $6.0M |
| May 18, 2026 | Michael Hsing KEY | Sell S | 5.0K | $7.4M |
| May 18, 2026 | Michael Hsing KEY | Sell S | 5.8K | $8.5M |
| May 18, 2026 | Michael Hsing KEY | Sell S | 3.4K | $5.0M |
| May 18, 2026 | Robert W Dean II KEY | Sell S | 4 | $6.3K |
| May 15, 2026 | Maurice Sciammas 10b5-1 | Sell S | 50 | $79.3K |
| May 15, 2026 | Maurice Sciammas 10b5-1 | Sell S | 447 | $707.2K |
| May 15, 2026 | Maurice Sciammas 10b5-1 | Sell S | 703 | $1.1M |
| May 15, 2026 | Maurice Sciammas 10b5-1 | Sell S | 1.3K | $2.1M |
| May 15, 2026 | Maurice Sciammas 10b5-1 | Sell S | 2.0K | $3.2M |
| May 15, 2026 | Maurice Sciammas 10b5-1 | Sell S | 2.0K | $3.1M |
| May 15, 2026 | Maurice Sciammas 10b5-1 | Sell S | 1.7K | $2.7M |
| May 15, 2026 | Maurice Sciammas 10b5-1 | Sell S | 3.7K | $5.8M |
| May 13, 2026 | Maurice Sciammas | Other G | 1.6K | $0 |
| May 13, 2026 | Robert W Dean II KEY | Other J | 2.2K | $0 |
| May 6, 2026 | Jeff Zhou | Sell S | 500 | $825.0K |
| May 6, 2026 | Deming Xiao | Sell S | 907 | $1.5M |
| May 6, 2026 | Deming Xiao | Sell S | 11.6K | $19.2M |
| May 6, 2026 | Deming Xiao | Sell S | 14.2K | $23.4M |
| May 6, 2026 | Deming Xiao | Sell S | 3.3K | $5.5M |
| May 6, 2026 | Eileen Wynne | Sell S | 335 | $530.2K |
| May 6, 2026 | Eugen J Elmiger | Sell S | 514 | $822.5K |
| May 6, 2026 | Eugen J Elmiger | Sell S | 2.6K | $4.2M |
| May 6, 2026 | Eugen J Elmiger | Sell S | 1.4K | $2.2M |
| May 6, 2026 | Eugen J Elmiger | Sell S | 2.6K | $4.1M |
| May 6, 2026 | Eugen J Elmiger | Sell S | 1.9K | $3.0M |
| May 6, 2026 | Eugen J Elmiger | Sell S | 834 | $1.3M |
| May 6, 2026 | Eugen J Elmiger | Sell S | 1.1K | $1.7M |
| May 6, 2026 | Eugen J Elmiger | Sell S | 814 | $1.3M |
| May 6, 2026 | Eugen J Elmiger | Sell S | 320 | $499.2K |
| May 5, 2026 | Jeff Zhou | Sell S | 500 | $800.0K |
| May 5, 2026 | Jeff Zhou | Sell S | 514 | $809.3K |
| May 5, 2026 | Maurice Sciammas | Sell S | 380 | $601.8K |
| May 4, 2026 | Maurice Sciammas 10b5-1 | Sell S | 30 | $47.7K |
| Apr 8, 2026 | Saria Tseng 10b5-1 | Sell S | 120 | $158.6K |
| Apr 8, 2026 | Saria Tseng 10b5-1 | Sell S | 840 | $1.1M |
| Apr 8, 2026 | Saria Tseng 10b5-1 | Sell S | 4.2K | $5.6M |
| Apr 8, 2026 | Saria Tseng 10b5-1 | Sell S | 1.3K | $1.7M |
| Apr 8, 2026 | Saria Tseng 10b5-1 | Sell S | 800 | $1.0M |
| Apr 8, 2026 | Saria Tseng 10b5-1 | Sell S | 400 | $516.8K |
| Apr 8, 2026 | Saria Tseng 10b5-1 | Sell S | 120 | $154.5K |
| Apr 8, 2026 | Saria Tseng 10b5-1 | Sell S | 240 | $307.1K |
| Apr 8, 2026 | Saria Tseng 10b5-1 | Sell S | 360 | $457.3K |
| Apr 8, 2026 | Saria Tseng 10b5-1 | Sell S | 560 | $709.2K |
| Apr 6, 2026 | Saria Tseng 10b5-1 | Sell S | 1.4K | $1.6M |
| Apr 6, 2026 | Saria Tseng 10b5-1 | Sell S | 1.7K | $2.0M |
| Apr 6, 2026 | Saria Tseng 10b5-1 | Sell S | 2.0K | $2.4M |
| Apr 6, 2026 | Saria Tseng 10b5-1 | Sell S | 684 | $797.3K |
| Apr 6, 2026 | Saria Tseng 10b5-1 | Sell S | 560 | $649.4K |
| Apr 6, 2026 | Saria Tseng 10b5-1 | Sell S | 480 | $551.5K |
| Apr 6, 2026 | Saria Tseng 10b5-1 | Sell S | 556 | $636.3K |
| Apr 6, 2026 | Saria Tseng 10b5-1 | Sell S | 244 | $278.2K |
| Apr 1, 2026 | Saria Tseng 10b5-1 | Sell S | 292 | $332.0K |
| Apr 1, 2026 | Saria Tseng 10b5-1 | Sell S | 188 | $213.6K |
| Apr 1, 2026 | Saria Tseng 10b5-1 | Sell S | 160 | $181.5K |
| Apr 1, 2026 | Saria Tseng 10b5-1 | Sell S | 184 | $208.3K |
| Apr 1, 2026 | Saria Tseng 10b5-1 | Sell S | 576 | $651.6K |
| Apr 1, 2026 | Maurice Sciammas 10b5-1 | Sell S | 30 | $33.5K |
| Mar 30, 2026 | Saria Tseng 10b5-1 | Sell S | 80 | $83.3K |
| Mar 30, 2026 | Saria Tseng 10b5-1 | Sell S | 166 | $171.9K |
| Mar 30, 2026 | Saria Tseng 10b5-1 | Sell S | 2.4K | $2.5M |
| Mar 30, 2026 | Saria Tseng 10b5-1 | Sell S | 2.2K | $2.3M |
| Mar 30, 2026 | Saria Tseng 10b5-1 | Sell S | 3.2K | $3.2M |
| Mar 30, 2026 | Saria Tseng 10b5-1 | Sell S | 3.4K | $3.4M |
| Mar 30, 2026 | Saria Tseng 10b5-1 | Sell S | 9.1K | $9.1M |
| Mar 30, 2026 | Saria Tseng 10b5-1 | Sell S | 5.2K | $5.2M |
| Mar 20, 2026 | Maurice Sciammas 10b5-1 | Sell S | 30 | $32.9K |
| Feb 12, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 1.4K | $1.8M |
| Feb 12, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 1.2K | $1.5M |
| Feb 12, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 3.6K | $4.4M |
| Feb 12, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 1.4K | $1.7M |
| Feb 12, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 600 | $716.6K |
| Feb 12, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 160 | $190.1K |
| Feb 12, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 480 | $566.8K |
| Feb 12, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 200 | $234.7K |
| Feb 12, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 2.1K | $2.4M |
| Feb 12, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 4.0K | $4.7M |
| Feb 12, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 5.0K | $5.8M |
| Feb 12, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 12.7K | $14.7M |
| Feb 11, 2026 | Maurice Sciammas | Sell S | 200 | $236.0K |
| Feb 11, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 649 | $780.3K |
| Feb 11, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 14.6K | $17.5M |
| Feb 11, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 6.1K | $7.3M |
| Feb 11, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 2.1K | $2.5M |
| Feb 11, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 1.5K | $1.8M |
| Feb 11, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 2.8K | $3.3M |
| Feb 11, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 2.0K | $2.3M |
| Feb 11, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 1.5K | $1.8M |
| Feb 11, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 1.4K | $1.6M |
| Feb 11, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 363 | $420.6K |
| Feb 10, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 280 | $335.2K |
| Feb 10, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 880 | $1.0M |
| Feb 10, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 360 | $418.1K |
| Feb 10, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 694 | $801.5K |
| Feb 10, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 1.2K | $1.4M |
| Feb 10, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 3.9K | $4.4M |
| Feb 10, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 16.1K | $18.4M |
| Feb 10, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 6.3K | $7.2M |
| Feb 10, 2026 | Michael Hsing KEY 10b5-1 | Sell S | 4.3K | $4.9M |
| Feb 9, 2026 | Victor K Lee 10b5-1 | Sell S | 400 | $484.9K |
| Feb 6, 2026 | Deming Xiao | Sell S | 22.9K | $26.8M |
| Feb 6, 2026 | Saria Tseng | Sell S | 22.9K | $26.8M |
| Feb 6, 2026 | Maurice Sciammas | Sell S | 22.9K | $26.8M |
| Feb 6, 2026 | Michael Hsing KEY | Sell S | 54.9K | $64.3M |
| Feb 6, 2026 | Theodore Blegen KEY | Sell S | 21.7K | $25.4M |
| Feb 3, 2026 | Eileen Wynne | Grant A | 189 | $0 |
| Feb 3, 2026 | Jeff Zhou | Grant A | 189 | $0 |
| Feb 3, 2026 | Carintia Martinez | Grant A | 189 | $0 |
| Feb 3, 2026 | Deming Xiao | Grant A | 57.2K | $0 |
| Feb 3, 2026 | Saria Tseng | Grant A | 57.2K | $0 |
| Feb 3, 2026 | Maurice Sciammas | Grant A | 57.2K | $0 |
| Feb 3, 2026 | Victor K Lee | Grant A | 189 | $0 |
| Feb 3, 2026 | Michael Hsing KEY | Grant A | 136.8K | $0 |
| Feb 3, 2026 | Eugen J Elmiger | Grant A | 189 | $0 |
| Feb 3, 2026 | Kuo Wei Herbert Chang | Grant A | 189 | $0 |
| Feb 3, 2026 | Theodore Blegen KEY | Grant A | 38.7K | $0 |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 80 | $91.2K |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 80 | $91.0K |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 120 | $136.4K |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 120 | $136.3K |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 241 | $273.4K |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 379 | $429.6K |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 322 | $364.7K |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 198 | $224.1K |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 320 | $361.8K |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 240 | $271.0K |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 240 | $270.8K |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 80 | $90.2K |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 200 | $225.3K |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 40 | $44.9K |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 80 | $89.7K |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 40 | $44.7K |
| Feb 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 220 | $244.3K |
| Jan 2, 2026 | Victor K Lee 10b5-1 | Sell S | 600 | $558.5K |
| Jan 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 80 | $75.7K |
| Jan 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 40 | $37.8K |
| Jan 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 650 | $613.8K |
| Jan 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 539 | $508.7K |
| Jan 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 74 | $69.7K |
| Jan 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 406 | $382.3K |
| Jan 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 40 | $37.6K |
| Jan 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 117 | $110.0K |
| Jan 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 460 | $431.7K |
| Jan 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 120 | $112.4K |
| Jan 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 80 | $74.8K |
| Jan 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 40 | $37.4K |
| Jan 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 80 | $74.7K |
| Jan 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 194 | $180.6K |
| Jan 2, 2026 | Theodore Blegen KEY 10b5-1 | Sell S | 80 | $74.2K |
About MPWR insider trading
This page tracks insider transactions for MONOLITHIC POWER SYSTEMS INC (MPWR) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.