MONOLITHIC POWER SYSTEMS INC - MPWR

Insiders (Form 4) · last 180 days · showing up to 200 transactions · Form 144 is shown in the SEC filings tab · Updating…
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Transaction codes: P = Open-market purchase · S = Open-market sale · A = Grant/award · M = Exercise/conversion of derivative · G = Gift · F = Tax withholding · J = Other · A/D: A = Acquired (buy/receive) · D = Disposed (sell/give)
Filed Owner Title Code A/D Shares Price Value Shares after SEC
May 20, 2026 CEO S D 130.0 1,521.43 197,785.9 848,263.0 View
May 20, 2026 CEO S D 352.0 1,518.15 534,388.8 848,393.0 View
May 20, 2026 CEO S D 551.0 1,513.11 833,723.61 848,745.0 View
May 20, 2026 CEO S D 3,769.0 1,507.7 5,682,521.3 849,296.0 View
May 20, 2026 CEO S D 2,929.0 1,503.05 4,402,433.45 853,065.0 View
May 20, 2026 CEO S D 608.0 1,499.46 911,671.68 855,994.0 View
May 20, 2026 CEO S D 862.0 1,491.48 1,285,655.76 856,602.0 View
May 20, 2026 CEO S D 6,688.0 1,486.76 9,943,450.88 857,464.0 View
May 20, 2026 CEO S D 5,737.0 1,482.51 8,505,159.87 864,152.0 View
May 20, 2026 CEO S D 4,082.0 1,476.96 6,028,950.72 869,889.0 View
May 20, 2026 CEO S D 5,049.0 1,472.84 7,436,369.16 873,971.0 View
May 20, 2026 CEO S D 5,819.0 1,467.62 8,540,080.78 879,020.0 View
May 20, 2026 CEO S D 3,424.0 1,462.61 5,007,976.64 884,839.0 View
May 20, 2026 Interim CFO S D 4.0 1,563.28 6,253.12 5,900.0 View
May 19, 2026 EVP, WW Sales & Marketing S D 50.0 1,585.51 79,275.5 166,644.0 View
May 19, 2026 EVP, WW Sales & Marketing S D 447.0 1,582.21 707,247.87 166,694.0 View
May 19, 2026 EVP, WW Sales & Marketing S D 703.0 1,577.75 1,109,158.25 167,141.0 View
May 19, 2026 EVP, WW Sales & Marketing S D 1,312.0 1,571.49 2,061,794.88 167,844.0 View
May 19, 2026 EVP, WW Sales & Marketing S D 2,020.0 1,567.15 3,165,643.0 169,156.0 View
May 19, 2026 EVP, WW Sales & Marketing S D 2,010.0 1,562.01 3,139,640.1 171,176.0 View
May 19, 2026 EVP, WW Sales & Marketing S D 1,717.0 1,557.48 2,674,193.16 173,186.0 View
May 19, 2026 EVP, WW Sales & Marketing S D 3,741.0 1,550.36 5,799,896.76 174,903.0 View
May 15, 2026 EVP, WW Sales & Marketing G A 1,563.0 0.0 0.0 51,023.0 View
May 15, 2026 EVP, WW Sales & Marketing G D 1,563.0 0.0 0.0 25,097.0 View
May 15, 2026 Interim CFO J D 2,156.0 0.0 0.0 5,904.0 View
May 08, 2026 S D 514.0 1,600.14 822,471.96 5,402.0 View
May 08, 2026 S D 2,619.0 1,596.42 4,181,023.98 5,916.0 View
May 08, 2026 S D 1,355.0 1,591.38 2,156,319.9 8,535.0 View
May 08, 2026 S D 2,587.0 1,586.81 4,105,077.47 9,890.0 View
May 08, 2026 S D 1,879.0 1,581.81 2,972,220.99 12,477.0 View
May 08, 2026 S D 834.0 1,575.57 1,314,025.38 14,356.0 View
May 08, 2026 S D 1,078.0 1,571.58 1,694,163.24 15,190.0 View
May 08, 2026 S D 814.0 1,566.36 1,275,017.04 16,268.0 View
May 08, 2026 S D 320.0 1,559.88 499,161.6 17,082.0 View
May 08, 2026 EVP, Global Operations S D 907.0 1,661.38 1,506,871.66 205,959.0 View
May 08, 2026 EVP, Global Operations S D 11,597.0 1,657.93 19,227,014.21 206,866.0 View
May 08, 2026 EVP, Global Operations S D 14,167.0 1,652.8 23,415,217.6 218,463.0 View
May 08, 2026 EVP, Global Operations S D 3,329.0 1,648.38 5,487,457.02 232,630.0 View
May 08, 2026 S D 335.0 1,582.68 530,197.8 1,007.0 View
May 06, 2026 S D 500.0 1,650.0 825,000.0 4,286.0 View
May 06, 2026 S D 500.0 1,600.0 800,000.0 4,786.0 View
May 06, 2026 S D 514.0 1,574.48 809,282.72 5,286.0 View
May 06, 2026 EVP, WW Sales & Marketing S D 380.0 1,583.81 601,847.8 919.0 View
May 06, 2026 EVP, WW Sales & Marketing S D 30.0 1,588.73 47,661.9 1,209.0 View
Apr 10, 2026 EVP & General Counsel S D 120.0 1,321.94 158,632.8 156,983.0 View
Apr 10, 2026 EVP & General Counsel S D 840.0 1,319.25 1,108,170.0 157,103.0 View
Apr 10, 2026 EVP & General Counsel S D 4,244.0 1,312.82 5,571,608.08 157,943.0 View
Apr 10, 2026 EVP & General Counsel S D 1,279.0 1,308.3 1,673,315.7 162,187.0 View
Apr 10, 2026 EVP & General Counsel S D 800.0 1,302.52 1,042,016.0 163,466.0 View
Apr 10, 2026 EVP & General Counsel S D 400.0 1,292.08 516,832.0 164,266.0 View
Apr 10, 2026 EVP & General Counsel S D 120.0 1,287.12 154,454.4 164,666.0 View
Apr 10, 2026 EVP & General Counsel S D 240.0 1,279.55 307,092.0 164,786.0 View
Apr 10, 2026 EVP & General Counsel S D 360.0 1,270.29 457,304.4 165,026.0 View
Apr 10, 2026 EVP & General Counsel S D 560.0 1,266.48 709,228.8 165,386.0 View
Apr 08, 2026 EVP & General Counsel S D 1,396.0 1,179.5 1,646,582.0 165,946.0 View
Apr 08, 2026 EVP & General Counsel S D 1,680.0 1,176.35 1,976,268.0 167,342.0 View
Apr 08, 2026 EVP & General Counsel S D 2,036.0 1,170.38 2,382,893.68 169,022.0 View
Apr 08, 2026 EVP & General Counsel S D 684.0 1,165.66 797,311.44 171,058.0 View
Apr 08, 2026 EVP & General Counsel S D 560.0 1,159.62 649,387.2 171,742.0 View
Apr 08, 2026 EVP & General Counsel S D 480.0 1,149.05 551,544.0 172,302.0 View
Apr 08, 2026 EVP & General Counsel S D 556.0 1,144.42 636,297.52 172,782.0 View
Apr 08, 2026 EVP & General Counsel S D 244.0 1,139.96 278,150.24 173,338.0 View
Apr 03, 2026 EVP & General Counsel S D 292.0 1,136.99 332,001.08 173,582.0 View
Apr 03, 2026 EVP & General Counsel S D 188.0 1,135.91 213,551.08 173,874.0 View
Apr 03, 2026 EVP & General Counsel S D 160.0 1,134.14 181,462.4 174,062.0 View
Apr 03, 2026 EVP & General Counsel S D 184.0 1,132.15 208,315.6 174,222.0 View
Apr 03, 2026 EVP & General Counsel S D 576.0 1,131.24 651,594.24 174,406.0 View
Apr 03, 2026 EVP, WW Sales & Marketing S D 30.0 1,116.44 33,493.2 1,239.0 View
Apr 01, 2026 EVP & General Counsel S D 80.0 1,041.12 83,289.6 174,982.0 View
Apr 01, 2026 EVP & General Counsel S D 166.0 1,035.6 171,909.6 175,062.0 View
Apr 01, 2026 EVP & General Counsel S D 2,440.0 1,029.21 2,511,272.4 175,228.0 View
Apr 01, 2026 EVP & General Counsel S D 2,200.0 1,023.0 2,250,600.0 177,668.0 View
Apr 01, 2026 EVP & General Counsel S D 3,194.0 1,017.22 3,249,000.68 179,868.0 View
Apr 01, 2026 EVP & General Counsel S D 3,360.0 1,009.63 3,392,356.8 183,062.0 View
Apr 01, 2026 EVP & General Counsel S D 9,080.0 1,005.18 9,127,034.4 186,422.0 View
Apr 01, 2026 EVP & General Counsel S D 5,154.0 1,000.81 5,158,174.74 195,502.0 View
Mar 24, 2026 EVP, WW Sales & Marketing S D 30.0 1,095.07 32,852.1 1,269.0 View
Feb 17, 2026 CEO S D 1,440.0 1,217.12 1,752,652.8 888,234.0 View
Feb 17, 2026 CEO S D 1,240.0 1,210.11 1,500,536.4 889,674.0 View
Feb 17, 2026 CEO S D 3,640.0 1,205.82 4,389,184.8 890,914.0 View
Feb 17, 2026 CEO S D 1,440.0 1,200.81 1,729,166.4 894,554.0 View
Feb 17, 2026 CEO S D 600.0 1,194.34 716,604.0 895,994.0 View
Feb 17, 2026 CEO S D 160.0 1,188.23 190,116.8 896,594.0 View
Feb 17, 2026 CEO S D 480.0 1,180.79 566,779.2 896,754.0 View
Feb 17, 2026 CEO S D 200.0 1,173.39 234,678.0 897,234.0 View
Feb 17, 2026 CEO S D 2,076.0 1,168.8 2,426,428.8 897,434.0 View
Feb 17, 2026 CEO S D 4,001.0 1,164.92 4,660,844.92 899,510.0 View
Feb 17, 2026 CEO S D 4,992.0 1,159.84 5,789,921.28 903,511.0 View
Feb 17, 2026 CEO S D 12,731.0 1,155.71 14,713,344.01 908,503.0 View
Feb 13, 2026 CEO S D 649.0 1,202.28 780,279.72 921,234.0 View
Feb 13, 2026 CEO S D 14,578.0 1,197.2 17,452,781.6 921,883.0 View
Feb 13, 2026 CEO S D 6,079.0 1,192.67 7,250,240.93 936,461.0 View
Feb 13, 2026 CEO S D 2,104.0 1,188.17 2,499,909.68 942,540.0 View
Feb 13, 2026 CEO S D 1,542.0 1,182.82 1,823,908.44 944,644.0 View
Feb 13, 2026 CEO S D 2,799.0 1,177.67 3,296,298.33 946,186.0 View
Feb 13, 2026 CEO S D 1,987.0 1,172.92 2,330,592.04 948,985.0 View
Feb 13, 2026 CEO S D 1,533.0 1,167.62 1,789,961.46 950,972.0 View
Feb 13, 2026 CEO S D 1,366.0 1,163.71 1,589,627.86 952,505.0 View
Feb 13, 2026 CEO S D 363.0 1,158.71 420,611.73 953,871.0 View
Feb 12, 2026 EVP, WW Sales & Marketing S D 200.0 1,179.975 235,995.0 1,299.0 View
Feb 12, 2026 CEO S D 280.0 1,197.26 335,232.8 954,234.0 View
Feb 12, 2026 CEO S D 880.0 1,176.04 1,034,915.2 954,514.0 View
Feb 12, 2026 CEO S D 360.0 1,161.41 418,107.6 955,394.0 View
Feb 12, 2026 CEO S D 694.0 1,154.96 801,542.24 955,754.0 View
Feb 12, 2026 CEO S D 1,215.0 1,151.11 1,398,598.65 956,448.0 View
Feb 12, 2026 CEO S D 3,864.0 1,145.9 4,427,757.6 957,663.0 View
Feb 12, 2026 CEO S D 16,080.0 1,141.88 18,361,430.4 961,527.0 View
Feb 12, 2026 CEO S D 6,325.0 1,136.75 7,189,943.75 977,607.0 View
Feb 12, 2026 CEO S D 4,302.0 1,132.01 4,869,907.02 983,932.0 View
Feb 11, 2026 S D 400.0 1,212.16 484,864.0 27,756.0 View
Feb 10, 2026 EVP and CFO S D 21,725.0 1,171.1637 25,443,531.38 82,353.0 View
Feb 10, 2026 EVP, WW Sales & Marketing S D 22,875.0 1,171.1637 26,790,369.64 178,625.0 View
Feb 10, 2026 EVP & General Counsel S D 22,875.0 1,171.1637 26,790,369.64 200,626.0 View
Feb 10, 2026 EVP, Global Operations S D 22,875.0 1,171.1637 26,790,369.64 235,932.0 View
Feb 10, 2026 CEO S D 54,923.0 1,171.1637 64,323,823.9 988,234.0 View
Feb 05, 2026 EVP, WW Sales & Marketing A A 57,170.0 0.0 0.0 201,500.0 View
Feb 05, 2026 CEO A A 136,825.0 0.0 0.0 1,043,157.0 View
Feb 05, 2026 EVP & General Counsel A A 57,170.0 0.0 0.0 223,501.0 View
Feb 05, 2026 EVP and CFO A A 38,745.0 0.0 0.0 104,078.0 View
Feb 05, 2026 EVP, Global Operations A A 57,170.0 0.0 0.0 258,807.0 View
Feb 05, 2026 A A 189.0 0.0 0.0 1,067.0 View
Feb 05, 2026 A A 189.0 0.0 0.0 28,156.0 View
Feb 05, 2026 A A 189.0 0.0 0.0 17,402.0 View
Feb 05, 2026 A A 189.0 0.0 0.0 615.0 View
Feb 05, 2026 A A 189.0 0.0 0.0 5,800.0 View
Feb 05, 2026 A A 189.0 0.0 0.0 1,342.0 View
Feb 04, 2026 EVP and CFO S D 80.0 1,139.49 91,159.2 65,333.0 View
Feb 04, 2026 EVP and CFO S D 80.0 1,137.81 91,024.8 65,412.0 View
Feb 04, 2026 EVP and CFO S D 120.0 1,136.35 136,362.0 65,492.0 View
Feb 04, 2026 EVP and CFO S D 120.0 1,135.49 136,258.8 65,612.0 View
Feb 04, 2026 EVP and CFO S D 241.0 1,134.41 273,392.81 65,732.0 View
Feb 04, 2026 EVP and CFO S D 379.0 1,133.47 429,585.13 65,973.0 View
Feb 04, 2026 EVP and CFO S D 322.0 1,132.67 364,719.74 66,352.0 View
Feb 04, 2026 EVP and CFO S D 198.0 1,131.7 224,076.6 66,674.0 View
Feb 04, 2026 EVP and CFO S D 320.0 1,130.48 361,753.6 66,872.0 View
Feb 04, 2026 EVP and CFO S D 240.0 1,129.28 271,027.2 67,192.0 View
Feb 04, 2026 EVP and CFO S D 240.0 1,128.43 270,823.2 67,432.0 View
Feb 04, 2026 EVP and CFO S D 80.0 1,127.39 90,191.2 67,672.0 View
Feb 04, 2026 EVP and CFO S D 200.0 1,126.58 225,316.0 67,752.0 View
Feb 04, 2026 EVP and CFO S D 40.0 1,122.56 44,902.4 67,952.0 View
Feb 04, 2026 EVP and CFO S D 80.0 1,120.77 89,661.6 67,992.0 View
Feb 04, 2026 EVP and CFO S D 40.0 1,117.11 44,684.4 68,072.0 View
Feb 04, 2026 EVP and CFO S D 220.0 1,110.58 244,327.6 68,112.0 View
Jan 06, 2026 S D 600.0 930.86 558,516.0 27,967.0 View
Jan 06, 2026 EVP and CFO S D 80.0 946.62 75,729.6 68,332.0 View
Jan 06, 2026 EVP and CFO S D 40.0 945.0 37,800.0 68,412.0 View
Jan 06, 2026 EVP and CFO S D 650.0 944.35 613,827.5 68,452.0 View
Jan 06, 2026 EVP and CFO S D 539.0 943.71 508,659.69 69,102.0 View
Jan 06, 2026 EVP and CFO S D 74.0 942.42 69,739.08 69,641.0 View
Jan 06, 2026 EVP and CFO S D 406.0 941.6 382,289.6 69,715.0 View
Jan 06, 2026 EVP and CFO S D 40.0 940.03 37,601.2 70,121.0 View
Jan 06, 2026 EVP and CFO S D 117.0 939.75 109,950.75 70,161.0 View
Jan 06, 2026 EVP and CFO S D 460.0 938.52 431,719.2 70,278.0 View
Jan 06, 2026 EVP and CFO S D 120.0 936.5 112,380.0 70,738.0 View
Jan 06, 2026 EVP and CFO S D 80.0 935.33 74,826.4 70,858.0 View
Jan 06, 2026 EVP and CFO S D 40.0 934.74 37,389.6 70,938.0 View
Jan 06, 2026 EVP and CFO S D 80.0 933.64 74,691.2 70,978.0 View
Jan 06, 2026 EVP and CFO S D 194.0 930.86 180,586.84 71,058.0 View
Jan 06, 2026 EVP and CFO S D 80.0 927.61 74,208.8 71,252.0 View
Dec 30, 2025 EVP & General Counsel G A 1,000.0 0.0 0.0 1,000.0 View
Dec 30, 2025 EVP & General Counsel G D 1,000.0 0.0 0.0 166,331.0 View
Dec 29, 2025 S D 80.0 955.08 76,406.4 28,567.0 View
Dec 29, 2025 S D 200.0 953.7 190,740.0 28,647.0 View
Dec 29, 2025 S D 83.0 952.37 79,046.71 28,847.0 View
Dec 29, 2025 S D 160.0 951.6 152,256.0 28,930.0 View
Dec 29, 2025 S D 280.0 950.64 266,179.2 29,090.0 View
Dec 29, 2025 S D 197.0 949.7 187,090.9 29,370.0 View
Dec 11, 2025 CEO G D 12,337.0 0.0 0.0 906,332.0 View
Dec 02, 2025 EVP and CFO S D 56.0 911.59 51,049.04 71,332.0 View
Dec 02, 2025 EVP and CFO S D 1,984.0 909.0 1,803,456.0 71,388.0 View
Dec 02, 2025 EVP and CFO S D 480.0 908.69 436,171.2 73,372.0 View
Dec 02, 2025 EVP and CFO S D 80.0 907.59 72,607.2 73,852.0 View
Dec 02, 2025 EVP and CFO S D 80.0 906.84 72,547.2 73,932.0 View
Dec 02, 2025 EVP and CFO S D 120.0 904.38 108,525.6 74,012.0 View
Dec 02, 2025 EVP and CFO S D 40.0 902.31 36,092.4 74,132.0 View
Dec 02, 2025 EVP and CFO S D 80.0 901.88 72,150.4 74,172.0 View
Dec 02, 2025 EVP and CFO S D 40.0 900.88 36,035.2 74,252.0 View
Dec 02, 2025 EVP and CFO S D 40.0 899.73 35,989.2 74,292.0 View
Nov 28, 2025 EVP & General Counsel S D 680.0 930.48 632,726.4 167,331.0 View
Nov 28, 2025 EVP & General Counsel S D 2,238.0 929.29 2,079,751.02 168,011.0 View
Nov 28, 2025 EVP & General Counsel S D 984.0 928.6 913,742.4 170,249.0 View
Nov 28, 2025 EVP & General Counsel S D 1,845.0 927.41 1,711,071.45 171,233.0 View
Nov 28, 2025 EVP & General Counsel S D 10,360.0 926.02 9,593,567.2 173,078.0 View
Nov 28, 2025 EVP & General Counsel S D 1,126.0 925.55 1,042,169.3 183,438.0 View
Nov 28, 2025 EVP & General Counsel S D 1,327.0 924.32 1,226,572.64 184,564.0 View
Nov 28, 2025 EVP & General Counsel S D 1,200.0 923.54 1,108,248.0 185,891.0 View
Nov 28, 2025 EVP & General Counsel S D 240.0 922.78 221,467.2 187,091.0 View
Nov 28, 2025 EVP & General Counsel S D 240.0 912.3 218,952.0 187,331.0 View
Nov 28, 2025 EVP & General Counsel S D 324.0 911.92 295,462.08 187,571.0 View
Nov 28, 2025 EVP & General Counsel S D 359.0 910.42 326,840.78 187,895.0 View
Nov 28, 2025 EVP & General Counsel S D 556.0 909.35 505,598.6 188,254.0 View
Nov 28, 2025 EVP & General Counsel S D 888.0 908.49 806,739.12 188,810.0 View
Nov 28, 2025 EVP & General Counsel S D 10,200.0 907.21 9,253,542.0 189,698.0 View
Nov 28, 2025 EVP & General Counsel S D 272.0 906.33 246,521.76 199,898.0 View
Nov 28, 2025 EVP & General Counsel S D 160.0 905.32 144,851.2 200,170.0 View
Nov 28, 2025 EVP & General Counsel S D 200.0 904.39 180,878.0 200,330.0 View
Nov 28, 2025 EVP & General Counsel S D 160.0 903.54 144,566.4 200,530.0 View
Nov 28, 2025 EVP & General Counsel S D 120.0 902.07 108,248.4 200,690.0 View
Nov 28, 2025 EVP & General Counsel S D 880.0 901.58 793,390.4 200,810.0 View
Nov 28, 2025 EVP & General Counsel S D 346.0 900.41 311,541.86 201,690.0 View