Monolithic Power Systems Inc (MPWR)

Over the past 90 days, Monolithic Power Systems insiders have executed 64 transactions, resulting in a net negative value of approximately $153.2 million. All activity consisted of sales, with no reported purchases. These divestments by executives and officers occurred following the company's April earnings report, amid a 7.7% decline in stock price.
Ticker: MPWR Exchange: NSM


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Insider trades have triggered activity signals for Monolithic Power Systems Inc. Upgrade to see score, net flow, insiders and the full signal context.

Top insiders
Trades
Sciammas Maurice
EVP, WW Sales & Marketing
18 sales — total 1,800,000 USD
Planned sale 15 Jul 2026
Value US$4,262,442.03 | Price 22.54 | Shares 11,898
Planned sale 15 Jul 2026
Value US$3,479,510.97 | Price 41.76 | Shares 61,372
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 1,396.16 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 1,388.19 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 1,384.11 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 1,378.73 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 1,375.47 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 1,369.18 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 1,359.36 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 1,352.95 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 1,348.91 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 1,344.16 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 1,339.59 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 1,334.59 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 1,329.30 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 1,323.93 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 1,318.42 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 1,314.03 | Shares 1,000
Proposed sale 15 Jul 2026
Value US$4,102,591.97 | Price 397.93 | Shares 97,506
Planned sale 1 Jul 2026
Value US$100,000.00 | Price 1,351.61 | Shares 1,000
Planned sale 1 Jun 2026
Value US$46,018.50 | Price 1,533.95 | Shares 30
Proposed sale 1 Jun 2026
Value US$4,625,867.74 | Price 1,541.44 | Shares 3,001
Sale 27 May 2026
Value US$12,860,500.00 | Price 1,700.00 | Shares 7,565
Proposed sale 27 May 2026
Value US$12,860,500.00 | Price 1,700.00 | Shares 7,565
Sale 26 May 2026
Value US$36,290.32 | Price 1,649.56 | Shares 22
Proposed sale 26 May 2026
Value US$35,882.23 | Price 1,631.01 | Shares 22
Sale 26 May 2026
Value US$816,480.00 | Price 1,680.00 | Shares 486
Proposed sale 26 May 2026
Value US$816,480.00 | Price 1,680.00 | Shares 486
Sale 22 May 2026
Value US$7,932,150.00 | Price 1,586.43 | Shares 5,000
Proposed sale 22 May 2026
Value US$7,932,150.00 | Price 1,586.43 | Shares 5,000
Sale 18 May 2026
Value US$197,785.90 | Price 1,521.43 | Shares 130
Sale 18 May 2026
Value US$534,388.80 | Price 1,518.15 | Shares 352
Sale 18 May 2026
Value US$833,723.61 | Price 1,513.11 | Shares 551
Sale 18 May 2026
Value US$5,682,521.30 | Price 1,507.70 | Shares 3,769
Sale 18 May 2026
Value US$4,402,433.45 | Price 1,503.05 | Shares 2,929
Sale 18 May 2026
Value US$911,671.68 | Price 1,499.46 | Shares 608
Sale 18 May 2026
Value US$1,285,655.76 | Price 1,491.48 | Shares 862
Sale 18 May 2026
Value US$9,943,450.88 | Price 1,486.76 | Shares 6,688
Sale 18 May 2026
Value US$8,505,159.87 | Price 1,482.51 | Shares 5,737
Sale 18 May 2026
Value US$6,028,950.72 | Price 1,476.96 | Shares 4,082
Sale 18 May 2026
Value US$7,436,369.16 | Price 1,472.84 | Shares 5,049
Sale 18 May 2026
Value US$8,540,080.78 | Price 1,467.62 | Shares 5,819
Sale 18 May 2026
Value US$5,007,976.64 | Price 1,462.61 | Shares 3,424
Sale 18 May 2026
Value US$6,253.12 | Price 1,563.28 | Shares 4
Proposed sale 18 May 2026
Value US$6,253.12 | Price 1,563.28 | Shares 4
Proposed sale 18 May 2026
Value US$59,310,201.91 | Price 1,482.76 | Shares 40,000
Planned sale 15 May 2026
Value US$79,275.50 | Price 1,585.51 | Shares 50
Planned sale 15 May 2026
Value US$707,247.87 | Price 1,582.21 | Shares 447
Planned sale 15 May 2026
Value US$1,109,158.25 | Price 1,577.75 | Shares 703
Planned sale 15 May 2026
Value US$2,061,794.88 | Price 1,571.49 | Shares 1,312
Planned sale 15 May 2026
Value US$3,165,643.00 | Price 1,567.15 | Shares 2,020
Planned sale 15 May 2026
Value US$3,139,640.10 | Price 1,562.01 | Shares 2,010
Planned sale 15 May 2026
Value US$2,674,193.16 | Price 1,557.48 | Shares 1,717
Planned sale 15 May 2026
Value US$5,799,896.76 | Price 1,550.36 | Shares 3,741
Proposed sale 15 May 2026
Value US$18,736,864.80 | Price 1,561.41 | Shares 12,000
Proposed sale 15 May 2026
Value US$18,736,864.80 | Price 1,561.41 | Shares 12,000
Proposed sale 7 May 2026
Value US$19,828,200.00 | Price 1,652.35 | Shares 12,000
Sale 6 May 2026
Value US$822,471.96 | Price 1,600.14 | Shares 514
Sale 6 May 2026
Value US$4,181,023.98 | Price 1,596.42 | Shares 2,619
Sale 6 May 2026
Value US$2,156,319.90 | Price 1,591.38 | Shares 1,355
Sale 6 May 2026
Value US$4,105,077.47 | Price 1,586.81 | Shares 2,587
Sale 6 May 2026
Value US$2,972,220.99 | Price 1,581.81 | Shares 1,879
Sale 6 May 2026
Value US$1,314,025.38 | Price 1,575.57 | Shares 834
Sale 6 May 2026
Value US$1,694,163.24 | Price 1,571.58 | Shares 1,078
Sale 6 May 2026
Value US$1,275,017.04 | Price 1,566.36 | Shares 814
Sale 6 May 2026
Value US$499,161.60 | Price 1,559.88 | Shares 320
Sale 6 May 2026
Value US$1,506,871.66 | Price 1,661.38 | Shares 907
Sale 6 May 2026
Value US$19,227,014.21 | Price 1,657.93 | Shares 11,597
Sale 6 May 2026
Value US$23,415,217.60 | Price 1,652.80 | Shares 14,167
Sale 6 May 2026
Value US$5,487,457.02 | Price 1,648.38 | Shares 3,329
Sale 6 May 2026
Value US$530,197.80 | Price 1,582.68 | Shares 335
Sale 6 May 2026
Value US$825,000.00 | Price 1,650.00 | Shares 500
Proposed sale 6 May 2026
Value US$49,636,545.00 | Price 1,654.55 | Shares 30,000
Proposed sale 6 May 2026
Value US$825,000.00 | Price 1,650.00 | Shares 500
Proposed sale 6 May 2026
Value US$530,196.13 | Price 1,582.68 | Shares 335
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value
Number of shares Price Value Details
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
11,898 -38.1%
22.54
US$4,262,442
11,898 -38.1% 22.54 US$4,262,442
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
61,372 -45.8%
41.76
US$3,479,511
61,372 -45.8% 41.76 US$3,479,511
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
86,891 -6.9%
93.65
US$4,308,549
86,891 -6.9% 93.65 US$4,308,549
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,000 -0.0%
1,388.19
US$100,000
1,000 -0.0% 1,388.19 US$100,000
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,000 -0.3%
1,384.11
US$100,000
1,000 -0.3% 1,384.11 US$100,000
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,000 -0.3%
1,378.73
US$100,000
1,000 -0.3% 1,378.73 US$100,000
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,000 -0.3%
1,375.47
US$100,000
1,000 -0.3% 1,375.47 US$100,000
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,000 -0.2%
1,369.18
US$100,000
1,000 -0.2% 1,369.18 US$100,000
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,000 -0.0%
1,359.36
US$100,000
1,000 -0.0% 1,359.36 US$100,000
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,000 -3.5%
1,352.95
US$100,000
1,000 -3.5% 1,352.95 US$100,000
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,000 -0.9%
1,348.91
US$100,000
1,000 -0.9% 1,348.91 US$100,000
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,000 -1.1%
1,344.16
US$100,000
1,000 -1.1% 1,344.16 US$100,000
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,000 -0.9%
1,339.59
US$100,000
1,000 -0.9% 1,339.59 US$100,000
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,000 -0.5%
1,334.59
US$100,000
1,000 -0.5% 1,334.59 US$100,000
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,000 -0.3%
1,329.30
US$100,000
1,000 -0.3% 1,329.30 US$100,000
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,000 -0.2%
1,323.93
US$100,000
1,000 -0.2% 1,323.93 US$100,000
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,000 -0.2%
1,318.42
US$100,000
1,000 -0.2% 1,318.42 US$100,000
2026-07-17 2026-07-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,000 -0.3%
1,314.03
US$100,000
1,000 -0.3% 1,314.03 US$100,000
2026-07-15 2026-07-15 PrS Proposed sale

Officer

Officer
1,000
1,349.73
US$100,000
1,000 1,349.73 US$100,000
2026-07-06 2026-07-01 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,000 -2.5%
1,351.61
US$100,000
1,000 -2.5% 1,351.61 US$100,000
2026-06-03 2026-06-01 PlS Planned sale

EVP, WW Sales & Marketing

Officer
30 -2.5%
1,533.95
US$46,018
30 -2.5% 1,533.95 US$46,018
2026-06-01 2026-06-01 PrS Proposed sale

Officer

Officer
3,001
1,541.44
US$4,625,868
3,001 1,541.44 US$4,625,868
2026-05-29 2026-05-27 S Sale

EVP & General Counsel

Officer
7,565 -5.0%
1,700.00
US$12,860,500
7,565 -5.0% 1,700.00 US$12,860,500
2026-05-28 2026-05-27 PrS Proposed sale

Officer

Officer
7,565
1,700.00
US$12,860,500
7,565 1,700.00 US$12,860,500
2026-05-28 2026-05-26 S Sale

Interim CFO

Officer
22 -0.4%
1,649.56
US$36,290
22 -0.4% 1,649.56 US$36,290
2026-05-27 2026-05-26 S Sale Non-Executive Director
486 -11.3%
1,680.00
US$816,480
486 -11.3% 1,680.00 US$816,480
2026-05-26 2026-05-26 PrS Proposed sale

Officer

Officer
22
1,631.01
US$35,882
22 1,631.01 US$35,882
2026-05-26 2026-05-26 PrS Proposed sale

Director

Non-Executive Director
486
1,680.00
US$816,480
486 1,680.00 US$816,480
2026-05-27 2026-05-22 S Sale

EVP & General Counsel

Officer
5,000 -3.2%
1,586.43
US$7,932,150
5,000 -3.2% 1,586.43 US$7,932,150
2026-05-22 2026-05-22 PrS Proposed sale

Officer

Officer
5,000
1,586.43
US$7,932,150
5,000 1,586.43 US$7,932,150
2026-05-20 2026-05-18 S Sale

CEO

Executive Director
130 -0.0%
1,521.43
US$197,786
130 -0.0% 1,521.43 US$197,786
2026-05-20 2026-05-18 S Sale

CEO

Executive Director
352 -0.0%
1,518.15
US$534,389
352 -0.0% 1,518.15 US$534,389
2026-05-20 2026-05-18 S Sale

CEO

Executive Director
551 -0.1%
1,513.11
US$833,724
551 -0.1% 1,513.11 US$833,724
2026-05-20 2026-05-18 S Sale

CEO

Executive Director
3,769 -0.4%
1,507.70
US$5,682,521
3,769 -0.4% 1,507.70 US$5,682,521
2026-05-20 2026-05-18 S Sale

CEO

Executive Director
2,929 -0.3%
1,503.05
US$4,402,433
2,929 -0.3% 1,503.05 US$4,402,433
2026-05-20 2026-05-18 S Sale

CEO

Executive Director
608 -0.1%
1,499.46
US$911,672
608 -0.1% 1,499.46 US$911,672
2026-05-20 2026-05-18 S Sale

CEO

Executive Director
862 -0.1%
1,491.48
US$1,285,656
862 -0.1% 1,491.48 US$1,285,656
2026-05-20 2026-05-18 S Sale

CEO

Executive Director
6,688 -0.8%
1,486.76
US$9,943,451
6,688 -0.8% 1,486.76 US$9,943,451
2026-05-20 2026-05-18 S Sale

CEO

Executive Director
5,737 -0.7%
1,482.51
US$8,505,160
5,737 -0.7% 1,482.51 US$8,505,160
2026-05-20 2026-05-18 S Sale

CEO

Executive Director
4,082 -0.5%
1,476.96
US$6,028,951
4,082 -0.5% 1,476.96 US$6,028,951
2026-05-20 2026-05-18 S Sale

CEO

Executive Director
5,049 -0.6%
1,472.84
US$7,436,369
5,049 -0.6% 1,472.84 US$7,436,369
2026-05-20 2026-05-18 S Sale

CEO

Executive Director
5,819 -0.7%
1,467.62
US$8,540,081
5,819 -0.7% 1,467.62 US$8,540,081
2026-05-20 2026-05-18 S Sale

CEO

Executive Director
3,424 -0.4%
1,462.61
US$5,007,977
3,424 -0.4% 1,462.61 US$5,007,977
2026-05-20 2026-05-18 S Sale

Interim CFO

Officer
4 -0.1%
1,563.28
US$6,253
4 -0.1% 1,563.28 US$6,253
2026-05-18 2026-05-18 PrS Proposed sale

Officer

Officer
4
1,563.28
US$6,253
4 1,563.28 US$6,253
2026-05-18 2026-05-18 PrS Proposed sale

Officer; Director

Executive Director
40,000
1,482.76
US$59,310,202
40,000 1,482.76 US$59,310,202
2026-05-19 2026-05-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
50 -0.0%
1,585.51
US$79,276
50 -0.0% 1,585.51 US$79,276
2026-05-19 2026-05-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
447 -0.3%
1,582.21
US$707,248
447 -0.3% 1,582.21 US$707,248
2026-05-19 2026-05-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
703 -0.4%
1,577.75
US$1,109,158
703 -0.4% 1,577.75 US$1,109,158
2026-05-19 2026-05-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,312 -0.8%
1,571.49
US$2,061,795
1,312 -0.8% 1,571.49 US$2,061,795
2026-05-19 2026-05-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
2,020 -1.2%
1,567.15
US$3,165,643
2,020 -1.2% 1,567.15 US$3,165,643
2026-05-19 2026-05-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
2,010 -1.2%
1,562.01
US$3,139,640
2,010 -1.2% 1,562.01 US$3,139,640
2026-05-19 2026-05-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
1,717 -1.0%
1,557.48
US$2,674,193
1,717 -1.0% 1,557.48 US$2,674,193
2026-05-19 2026-05-15 PlS Planned sale

EVP, WW Sales & Marketing

Officer
3,741 -2.1%
1,550.36
US$5,799,897
3,741 -2.1% 1,550.36 US$5,799,897
2026-05-15 2026-05-15 PrS Proposed sale

Officer

Officer
12,000
1,561.41
US$18,736,865
12,000 1,561.41 US$18,736,865
2026-05-15 2026-05-15 PrS Proposed sale

Officer

Officer
12,000
1,561.41
US$18,736,865
12,000 1,561.41 US$18,736,865
2026-05-06 2026-05-07 PrS Proposed sale

Director

Non-Executive Director
12,000
1,652.35
US$19,828,200
12,000 1,652.35 US$19,828,200
2026-05-08 2026-05-06 S Sale Non-Executive Director
514 -8.7%
1,600.14
US$822,472
514 -8.7% 1,600.14 US$822,472
2026-05-08 2026-05-06 S Sale Non-Executive Director
2,619 -30.7%
1,596.42
US$4,181,024
2,619 -30.7% 1,596.42 US$4,181,024
2026-05-08 2026-05-06 S Sale Non-Executive Director
1,355 -13.7%
1,591.38
US$2,156,320
1,355 -13.7% 1,591.38 US$2,156,320
2026-05-08 2026-05-06 S Sale Non-Executive Director
2,587 -20.7%
1,586.81
US$4,105,077
2,587 -20.7% 1,586.81 US$4,105,077
2026-05-08 2026-05-06 S Sale Non-Executive Director
1,879 -13.1%
1,581.81
US$2,972,221
1,879 -13.1% 1,581.81 US$2,972,221
2026-05-08 2026-05-06 S Sale Non-Executive Director
834 -5.5%
1,575.57
US$1,314,025
834 -5.5% 1,575.57 US$1,314,025
2026-05-08 2026-05-06 S Sale Non-Executive Director
1,078 -6.6%
1,571.58
US$1,694,163
1,078 -6.6% 1,571.58 US$1,694,163
2026-05-08 2026-05-06 S Sale Non-Executive Director
814 -4.8%
1,566.36
US$1,275,017
814 -4.8% 1,566.36 US$1,275,017
2026-05-08 2026-05-06 S Sale Non-Executive Director
320 -1.8%
1,559.88
US$499,162
320 -1.8% 1,559.88 US$499,162
2026-05-08 2026-05-06 S Sale

EVP, Global Operations

Officer
907 -0.4%
1,661.38
US$1,506,872
907 -0.4% 1,661.38 US$1,506,872
2026-05-08 2026-05-06 S Sale

EVP, Global Operations

Officer
11,597 -5.3%
1,657.93
US$19,227,014
11,597 -5.3% 1,657.93 US$19,227,014
2026-05-08 2026-05-06 S Sale

EVP, Global Operations

Officer
14,167 -6.1%
1,652.80
US$23,415,218
14,167 -6.1% 1,652.80 US$23,415,218
2026-05-08 2026-05-06 S Sale

EVP, Global Operations

Officer
3,329 -1.4%
1,648.38
US$5,487,457
3,329 -1.4% 1,648.38 US$5,487,457
2026-05-08 2026-05-06 S Sale Non-Executive Director
335 -25.0%
1,582.68
US$530,198
335 -25.0% 1,582.68 US$530,198
2026-05-06 2026-05-06 S Sale Non-Executive Director
500 -10.4%
1,650.00
US$825,000
500 -10.4% 1,650.00 US$825,000
2026-05-06 2026-05-06 PrS Proposed sale

Officer

Officer
30,000
1,654.55
US$49,636,545
30,000 1,654.55 US$49,636,545
2026-05-06 2026-05-06 PrS Proposed sale

Director

Non-Executive Director
500
1,650.00
US$825,000
500 1,650.00 US$825,000
2026-05-06 2026-05-06 PrS Proposed sale

Director

Non-Executive Director
335
1,582.68
US$530,196
335 1,582.68 US$530,196