| Feb 25, 2019 SForm 4 → | Feb 27, 6:20 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 13,979 | $138.74 | $1,939,473 | 353,856 | −3.80% | plan? |
| Feb 15, 2019 JForm 4 → | Feb 27, 6:20 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 123 | $117.71 | $14,478 | 367,835 | — | plan? late |
| Feb 12, 2019 SForm 4 → | Feb 13, 5:17 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 21,308 | $130.66 | $2,784,041 | 367,712 | −5.48% | plan? |
| Feb 11, 2019 AForm 4 → | Feb 13, 5:17 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 74,331 | $30.00 | $2,229,930 | 389,020 | — | plan? |
| Feb 4, 2019 SForm 4 → | Feb 5, 6:05 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 3,623 | $129.59 | $469,501 | 314,689 | −1.14% | plan? |
| Nov 5, 2018 SForm 4 → | Nov 6, 5:20 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 4,819 | $121.73 | $586,625 | 318,312 | −1.49% | plan? |
| Oct 25, 2018 MForm 4 → | Oct 29, 7:16 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 27,960 | — | — | 323,131 | — | plan? |
| Aug 31, 2018 SForm 4 → | Sep 5, 5:24 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 10,000 | $148.55 | $1,485,500 | 295,171 | −3.28% | plan? |
| Aug 27, 2018 SForm 4 → | Aug 29, 4:55 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 3,334 | $150.00 | $500,105 | 305,171 | −1.08% | plan? |
| Aug 23, 2018 SForm 4 → | Aug 27, 5:01 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 5,497 | $145.82 | $801,587 | 308,505 | −1.75% | plan? |
| Aug 15, 2018 JForm 4 → | Aug 27, 5:01 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 73 | $98.74 | $7,208 | 314,002 | — | plan? late |
| Aug 10, 2018 SForm 4 → | Aug 14, 5:43 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 11,081 | $138.93 | $1,539,452 | 313,929 | −3.41% | plan? |
| Aug 3, 2018 SForm 4 → | Aug 7, 5:34 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 4,729 | $135.65 | $641,486 | 325,010 | −1.43% | plan? |
| May 18, 2018 SForm 4 → | May 22, 5:16 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 4,816 | $130.00 | $626,080 | 329,739 | −1.44% | plan? |
| May 3, 2018 SForm 4 → | May 7, 5:20 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 5,643 | $120.01 | $677,198 | 334,555 | −1.66% | plan? |
| Feb 15, 2018 JForm 4 → | May 7, 5:20 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 162 | $86.51 | $14,015 | 340,198 | — | plan? late |
| Feb 12, 2018 SForm 4 → | Feb 13, 5:03 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 29,203 | $108.19 | $3,159,595 | 340,036 | −7.91% | plan? |
| Feb 7, 2018 AForm 4 → | Feb 8, 8:04 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 98,760 | $20.00 | $1,975,200 | 369,239 | — | plan? |
| Feb 5, 2018 SForm 4 → | Feb 5, 6:45 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 4,382 | $113.85 | $498,909 | 270,479 | −1.59% | plan? |
| Nov 6, 2017 SForm 4 → | Nov 7, 6:16 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 6,004 | $123.06 | $738,868 | 274,861 | −2.14% | plan? |
| Aug 15, 2017 JForm 4 → | Nov 7, 6:16 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 144 | $73.12 | $10,529 | 280,865 | — | plan? late |
| Aug 4, 2017 SForm 4 → | Aug 7, 7:15 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 6,004 | $101.96 | $612,155 | 280,721 | −2.09% | plan? |
| May 24, 2017 SForm 4 → | May 25, 5:22 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 30 | $95.44 | $2,863 | 1,101 | −2.65% | plan? |
| May 18, 2017 SForm 4 → | May 19, 5:40 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 5,352 | $93.64 | $501,142 | 286,725 | −1.83% | plan? |
| May 4, 2017 SForm 4 → | May 8, 5:36 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 6,003 | $92.27 | $553,869 | 292,077 | −2.01% | plan? |
| Apr 24, 2017 SForm 4 → | Apr 26, 5:10 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 12 | $94.99 | $1,140 | 1,131 | −1.05% | plan? |
| Mar 16, 2017 SForm 4 → | Mar 17, 5:02 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 83 | $93.05 | $7,723 | 1,143 | −6.77% | plan? |
| Feb 28, 2017 SForm 4 → | Mar 2, 6:07 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 10,619 | $88.08 | $935,335 | 298,080 | −3.44% | plan? |
| Feb 24, 2017 SForm 4 → | Feb 28, 5:24 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 30 | $87.48 | $2,624 | 1,226 | −2.39% | plan? |
| Feb 15, 2017 JForm 4 → | Feb 28, 5:24 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 273 | $63.43 | $17,316 | 1,256 | — | plan? late |
| Feb 10, 2017 SForm 4 → | Feb 14, 8:05 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 31,823 | $87.54 | $2,785,794 | 308,530 | −9.35% | plan? |
| Feb 7, 2017 AMForm 4 → | Feb 8, 5:38 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 73,480 | — | — | 340,353 | — | plan? |
| Feb 6, 2017 SForm 4 → | Feb 8, 5:38 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 5,517 | $88.25 | $486,895 | 266,873 | −2.03% | plan? |
| Jan 23, 2017 SForm 4 → | Jan 25, 5:05 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 12 | $87.36 | $1,048 | 2,197 | −0.54% | plan? |
| Dec 16, 2016 SForm 4 → | Dec 19, 4:51 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 71 | $84.59 | $6,006 | 2,209 | −3.11% | plan? |
| Nov 25, 2016 SForm 4 → | Nov 29, 5:25 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 25 | $83.89 | $2,097 | 2,280 | −1.08% | plan? |
| Nov 9, 2016 SForm 4 → | Nov 14, 8:34 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 12,657 | $78.24 | $990,328 | 2,305 | −84.6% | plan? late |
| Nov 4, 2016 SForm 4 → | Nov 8, 5:53 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 7,113 | $77.80 | $553,424 | 278,732 | −2.49% | plan? |
| Oct 28, 2016 MForm 4 → | Nov 1, 6:52 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 14,628 | — | — | 285,845 | — | plan? |
| Oct 24, 2016 SForm 4 → | Oct 25, 5:17 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 11 | $77.89 | $857 | 172 | −6.01% | plan? |
| Oct 5, 2016 SForm 4 → | Oct 5, 6:18 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 89 | $79.14 | $7,043 | 183 | −32.7% | plan? |
| Sep 16, 2016 SForm 4 → | Sep 20, 5:37 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 70 | $75.78 | $5,305 | 272 | −20.5% | plan? |
| Aug 24, 2016 SForm 4 → | Aug 24, 6:53 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 25 | $75.85 | $1,896 | 342 | −6.81% | plan? |
| Aug 15, 2016 JForm 4 → | Aug 24, 6:53 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 31 | $49.38 | $1,531 | 271,217 | — | plan? late |
| Aug 10, 2016 SForm 4 → | Aug 12, 5:53 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 6,342 | $73.14 | $463,854 | 271,186 | −2.29% | plan? |
| Aug 4, 2016 SForm 4 → | Aug 8, 6:39 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 7,114 | $72.66 | $516,913 | 277,528 | −2.50% | plan? |
| Jul 25, 2016 SForm 4 → | Jul 26, 5:35 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 10 | $71.99 | $720 | 367 | −2.65% | plan? |
| Jul 5, 2016 SForm 4 → | Jul 6, 5:47 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 82 | $67.26 | $5,515 | 377 | −17.9% | plan? |
| Jun 16, 2016 SForm 4 → | Jun 17, 5:35 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 70 | $68.43 | $4,790 | 459 | −13.2% | plan? |
| May 24, 2016 SForm 4 → | May 26, 5:13 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 27 | $65.87 | $1,778 | 529 | −4.86% | plan? |
| May 11, 2016 SForm 4 → | May 13, 3:15 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 6,341 | $63.00 | $399,483 | 284,642 | −2.18% | plan? |
| May 4, 2016 SForm 4 → | May 6, 6:55 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 7,113 | $61.89 | $440,243 | 290,983 | −2.39% | plan? |
| May 2, 2016 SForm 4 → | May 3, 6:00 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 128 | $61.10 | $7,821 | 556 | −18.7% | plan? |
| Apr 25, 2016 SForm 4 → | Apr 26, 5:30 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 12 | $63.53 | $762 | 684 | −1.72% | plan? |
| Apr 11, 2016 SForm 4 → | Apr 12, 6:12 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 32,364 | $63.75 | $2,063,261 | 298,096 | −9.79% | plan? |
| Apr 5, 2016 SForm 4 → | Apr 6, 5:39 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 98 | $62.97 | $6,171 | 696 | −12.3% | plan? |
| Mar 16, 2016 SForm 4 → | Mar 17, 6:20 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 84 | $59.38 | $4,988 | 794 | −9.57% | plan? |
| Feb 24, 2016 SForm 4 → | Feb 25, 3:07 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 17 | $57.47 | $977 | 878 | −1.90% | plan? |
| Feb 16, 2016 JForm 4 → | Feb 25, 3:07 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 451 | $43.71 | $19,712 | 895 | — | plan? late |
| Feb 5, 2016 SForm 4 → | Feb 9, 5:25 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 6,360 | $57.50 | $365,690 | 330,009 | −1.89% | plan? |
| Feb 2, 2016 SForm 4 → | Feb 4, 6:44 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 25,404 | $57.95 | $1,472,197 | 469 | −98.2% | plan? |
| Feb 2, 2016 AForm 4 → | Feb 4, 6:44 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 102,748 | — | — | 895 | — | plan? |
| Jan 25, 2016 SForm 4 → | Jan 27, 5:17 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 12 | $61.07 | $733 | 596 | −1.97% | plan? |
| Jan 5, 2016 SForm 4 → | Jan 5, 6:25 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 97 | $60.93 | $5,910 | 608 | −13.8% | plan? |
| Dec 17, 2015 MForm 4 → | Dec 21, 5:11 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 43,200 | — | — | 259,324 | — | plan? |
| Dec 16, 2015 SForm 4 → | Dec 18, 7:41 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 71 | $64.26 | $4,562 | 705 | −9.15% | plan? |
| Nov 24, 2015 SForm 4 → | Nov 24, 8:09 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 14 | $65.75 | $921 | 776 | −1.77% | plan? |
| Nov 11, 2015 SForm 4 → | Nov 13, 12:46 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 5,815 | $64.15 | $373,011 | 216,124 | −2.62% | plan? |
| Nov 6, 2015 SForm 4 → | Nov 10, 3:13 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 5,322 | $63.91 | $340,113 | 221,939 | −2.34% | plan? |
| Nov 4, 2015 SForm 4 → | Nov 5, 7:08 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 1,167 | $62.69 | $73,163 | 227,261 | −0.51% | plan? |
| Oct 30, 2015 SForm 4 → | Nov 2, 7:18 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 11,532 | $62.34 | $718,925 | 790 | −93.6% | plan? |
| Oct 23, 2015 SForm 4 → | Oct 26, 6:23 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 11 | $58.20 | $640 | 899 | −1.21% | plan? |
| Oct 5, 2015 SForm 4 → | Oct 7, 3:08 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 89 | $52.00 | $4,628 | 910 | −8.91% | plan? |
| Sep 16, 2015 SForm 4 → | Sep 18, 6:32 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 72 | $51.44 | $3,704 | 999 | −6.72% | plan? |
| Sep 11, 2015 SForm 4 → | Sep 14, 6:42 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 151 | $49.81 | $7,521 | 1,071 | −12.4% | plan? |
| Aug 24, 2015 SForm 4 → | Aug 26, 1:56 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 15 | $44.28 | $664 | 1,222 | −1.21% | plan? |
| Aug 17, 2015 JForm 4 → | Aug 26, 1:56 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 81 | $43.02 | $3,484 | 239,851 | — | plan? late |
| Aug 10, 2015 SForm 4 → | Aug 11, 7:04 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 1,939 | $51.30 | $99,471 | 239,770 | −0.80% | plan? |
| Aug 6, 2015 SForm 4 → | Aug 6, 6:24 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 3,386 | $50.48 | $170,921 | 241,709 | −1.38% | plan? |
| Aug 3, 2015 SForm 4 → | Aug 5, 6:26 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 1,275 | $50.64 | $64,560 | 1,237 | −50.8% | plan? |
| Jul 23, 2015 SForm 4 → | Jul 24, 6:40 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 11 | $47.51 | $523 | 1,344 | −0.81% | plan? |
| Jul 6, 2015 SForm 4 → | Jul 7, 6:23 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 82 | $51.01 | $4,183 | 1,355 | −5.71% | plan? |
| Jun 16, 2015 SForm 4 → | Jun 17, 7:17 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 70 | $53.26 | $3,728 | 1,191 | −5.55% | plan? |
| Jun 11, 2015 SForm 4/A → | Jul 7, 6:21 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 146 | $53.18 | $7,764 | 1,507 | −8.83% | plan? |
| Jun 11, 2015 SForm 4 → | Jun 12, 6:04 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 392 | $53.18 | $20,847 | 1,261 | −23.7% | plan? amended |
| May 26, 2015 SForm 4 → | May 28, 5:02 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 14 | $53.85 | $754 | 1,653 | −0.84% | plan? |
| May 7, 2015 SForm 4 → | May 11, 6:33 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 10,220 | $52.05 | $531,993 | 246,263 | −3.98% | plan? |
| May 4, 2015 SForm 4 → | May 6, 6:43 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 7,451 | $52.08 | $388,045 | 1,667 | −81.7% | plan? |
| Apr 21, 2015 SForm 4 → | Apr 23, 6:20 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 27,070 | $54.00 | $1,461,785 | 1,780 | −93.8% | plan? |
| Apr 6, 2015 SForm 4 → | Apr 8, 6:02 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 97 | $51.28 | $4,974 | 1,792 | −5.13% | plan? |
| Mar 30, 2015 SForm 4 → | Mar 31, 7:21 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 10,696 | $53.00 | $566,894 | 290,879 | −3.55% | plan? |
| Mar 18, 2015 MForm 4 → | Mar 20, 1:45 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 43,200 | — | — | 301,575 | — | plan? |
| Mar 16, 2015 SForm 4 → | Mar 18, 6:05 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 259 | $53.16 | $13,768 | 1,889 | −12.1% | plan? |
| Feb 6, 2015 SForm 4 → | Feb 9, 8:26 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 2,748 | $47.51 | $130,555 | 214,701 | −1.26% | plan? |
| Feb 3, 2015 AJMForm 4 → | Mar 18, 6:05 pm EDT | MONOLITHIC POWER SYSTEMS INCMPWR | 44,243 | $37.45 | $17,752 | 2,148 | — | plan? late |
| Feb 3, 2015 SForm 4 → | Feb 5, 7:22 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 27,106 | $47.75 | $1,294,415 | 1,579 | −94.5% | plan? |
| Feb 3, 2015 AForm 4 → | Feb 5, 7:22 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 110,275 | — | — | 242,312 | — | plan? |
| Jan 26, 2015 SForm 4 → | Jan 27, 7:49 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 12 | $47.82 | $574 | 1,706 | −0.70% | plan? |
| Jan 5, 2015 SForm 4 → | Jan 6, 5:47 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 97 | $48.18 | $4,673 | 1,718 | −5.34% | plan? |
| Apr 24, 2012 AForm 4 → | Nov 14, 2016, 8:34 pm EST | MONOLITHIC POWER SYSTEMS INCMPWR | 8,448 | — | — | 8,620 | — | plan? late |