Form4insider filings, from the source

Company · CIK 0001280452 · SIC 3674 — Semiconductors & Related Devices · Nasdaq

MONOLITHIC POWER SYSTEMS, INC. · MPWR

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $319.7M · 324net −$319.7M
$10k$10k$1M$1M$100M$100MbuyssalesJan 2015Dec 2016Nov 2018Oct 2020Oct 2022Sep 2024Aug 2026

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Feb 5, 2016 SForm 4 →Feb 9, 5:25 pm ESTDeming XiaoPres. of MPS Asia Operations6,360$57.50$365,690330,009−1.89% plan?
Feb 5, 2016 SForm 4 →Feb 9, 5:24 pm ESTMichael HsingCEO, Director16,575$57.64$955,4081,371,608−1.19% plan?
Feb 4, 2016 SForm 4 →Feb 4, 6:49 pm ESTMeera RaoCFO17,559$57.93$1,017,258267,627−6.16% plan?
Feb 4, 2016 SForm 4 →Feb 4, 6:47 pm ESTMaurice SciammasSr. V.P.of Sales and Marketing22,057$57.93$1,277,844406,539−5.15% plan?
Feb 4, 2016 SForm 4 →Feb 4, 6:43 pm ESTMichael HsingCEO, Director88,849$57.93$5,147,3511,388,183−6.02% plan?
Feb 4, 2016 SForm 4 →Feb 4, 6:41 pm ESTSaria TsengVP & General Counsel22,057$57.93$1,277,844326,022−6.34% plan?
Feb 2, 2016 AForm 4 →Feb 4, 6:49 pm ESTMeera RaoCFO73,733——285,186— plan?
Feb 2, 2016 AForm 4 →Feb 4, 6:47 pm ESTMaurice SciammasSr. V.P.of Sales and Marketing90,284——428,596— plan?
Feb 2, 2016 SForm 4 →Feb 4, 6:44 pm ESTDeming XiaoPres. of MPS Asia Operations25,404$57.95$1,472,197469−98.2% plan?
Feb 2, 2016 AForm 4 →Feb 4, 6:44 pm ESTDeming XiaoPres. of MPS Asia Operations102,748——895— plan?
Feb 2, 2016 AForm 4 →Feb 4, 6:43 pm ESTMichael HsingCEO, Director337,002——1,477,032— plan?
Feb 2, 2016 AForm 4 →Feb 4, 6:41 pm ESTSaria TsengVP & General Counsel90,284——348,079— plan?
Jan 25, 2016 SForm 4 →Jan 27, 5:17 pm ESTDeming XiaoPres. of MPS Asia Operations12$61.07$733596−1.97% plan?
Jan 5, 2016 SForm 4 →Jan 5, 6:25 pm ESTDeming XiaoPres. of MPS Asia Operations97$60.93$5,910608−13.8% plan?
Dec 17, 2015 MForm 4 →Dec 21, 5:13 pm ESTMeera RaoCFO36,000——211,453— plan?
Dec 17, 2015 MForm 4 →Dec 21, 5:12 pm ESTMaurice SciammasSr. V.P.of Sales and Marketing43,200——338,312— plan?
Dec 17, 2015 MForm 4 →Dec 21, 5:11 pm ESTDeming XiaoPres. of MPS Asia Operations43,200——259,324— plan?
Dec 17, 2015 MForm 4 →Dec 21, 5:11 pm ESTMichael HsingCEO, Director110,000——1,140,030— plan?
Dec 17, 2015 MForm 4 →Dec 21, 5:10 pm ESTSaria TsengVP & General Counsel43,200——257,795— plan?
Dec 16, 2015 SForm 4 →Dec 18, 7:41 pm ESTDeming XiaoPres. of MPS Asia Operations71$64.26$4,562705−9.15% plan?
Nov 30, 2015 SForm 4 →Dec 1, 6:38 pm ESTJames C MoyerDirector10,000$68.05$680,500884,302−1.12% plan?
Nov 24, 2015 SForm 4 →Nov 24, 8:09 pm ESTDeming XiaoPres. of MPS Asia Operations14$65.75$921776−1.77% plan?
Nov 24, 2015 SForm 4 →Nov 24, 8:08 pm ESTVictor K LeeDirector2,582$67.05$173,12320,615−11.1% plan?
Nov 24, 2015 MForm 4 →Nov 24, 8:08 pm ESTVictor K LeeDirector2,582$12.28$31,70722,021— plan?
Nov 19, 2015 SForm 4 →Nov 23, 11:00 am ESTJeff ZhouDirector2,500$66.27$165,68114,815−14.4% plan?
Nov 13, 2015 SForm 4 →Nov 16, 7:10 pm ESTSaria TsengVP & General Counsel4,998$62.77$313,720214,595−2.28% plan?
Nov 11, 2015 SForm 4 →Nov 13, 12:48 pm ESTMeera RaoCFO4,139$64.16$265,555175,453−2.30% plan?
Nov 11, 2015 SForm 4 →Nov 13, 12:46 pm ESTDeming XiaoPres. of MPS Asia Operations5,815$64.15$373,011216,124−2.62% plan?
Nov 6, 2015 SForm 4 →Nov 10, 3:13 pm ESTMaurice SciammasSr. V.P.of Sales and Marketing4,507$63.91$288,031295,112−1.50% plan?
Nov 6, 2015 SForm 4 →Nov 10, 3:13 pm ESTDeming XiaoPres. of MPS Asia Operations5,322$63.91$340,113221,939−2.34% plan?
Nov 6, 2015 SForm 4 →Nov 10, 3:12 pm ESTMeera RaoCFO3,754$63.91$239,907179,592−2.05% plan?
Nov 6, 2015 SForm 4 →Nov 10, 3:12 pm ESTMichael HsingCEO, Director21,733$63.81$1,386,8901,030,030−2.07% plan?
Nov 6, 2015 SForm 4 →Nov 10, 2:51 pm ESTSaria TsengVP & General Counsel4,507$63.91$288,031219,593−2.01% plan?
Nov 5, 2015 SForm 4 →Nov 6, 7:08 pm ESTVictor K LeeDirector20,000$63.62$1,272,35520,615−49.2% plan?
Nov 5, 2015 MForm 4 →Nov 6, 7:08 pm ESTVictor K LeeDirector20,000$12.28$245,60025,615— plan?
Nov 4, 2015 SForm 4 →Nov 5, 7:08 pm ESTDeming XiaoPres. of MPS Asia Operations1,167$62.69$73,163227,261−0.51% plan?
Nov 4, 2015 SForm 4 →Nov 5, 7:07 pm ESTSaria TsengVP & General Counsel1,071$62.69$67,145224,100−0.48% plan?
Nov 4, 2015 SForm 4 →Nov 5, 7:06 pm ESTMaurice SciammasSr. V.P.of Sales and Marketing1,071$62.69$67,145299,619−0.36% plan?
Nov 4, 2015 SForm 4 →Nov 5, 7:04 pm ESTMeera RaoCFO869$62.69$54,480183,346−0.47% plan?
Nov 4, 2015 SForm 4 →Nov 5, 7:03 pm ESTMichael HsingCEO, Director3,841$62.69$240,8041,051,763−0.36% plan?
Oct 30, 2015 SForm 4 →Nov 2, 7:18 pm ESTDeming XiaoPres. of MPS Asia Operations11,532$62.34$718,925790−93.6% plan?
Oct 30, 2015 SForm 4 →Nov 2, 7:17 pm ESTVictor K LeeDirector3,594$62.61$225,02820,615−14.8% plan?
Oct 30, 2015 MForm 4 →Nov 2, 7:17 pm ESTVictor K LeeDirector3,594$12.28$44,13421,209— plan?
Oct 23, 2015 SForm 4 →Oct 26, 6:23 pm EDTDeming XiaoPres. of MPS Asia Operations11$58.20$640899−1.21% plan?
Oct 16, 2015 SForm 4 →Oct 19, 6:50 pm EDTMaurice SciammasSr. V.P.of Sales and Marketing2,565$57.28$146,933300,690−0.85% plan?
Oct 14, 2015 SForm 4 →Oct 15, 7:37 pm EDTMaurice SciammasSr. V.P.of Sales and Marketing8,625$56.15$484,280303,255−2.77% plan?
Oct 9, 2015 SForm 4 →Oct 13, 3:35 pm EDTMaurice SciammasSr. V.P.of Sales and Marketing1,400$55.50$77,700311,880−0.45% plan?
Oct 7, 2015 SForm 4 →Oct 9, 5:48 pm EDTMeera RaoCFO4,136$55.18$228,231184,215−2.20% plan?
Oct 6, 2015 SForm 4 →Oct 7, 5:10 pm EDTSaria TsengVP & General Counsel8,284$54.08$447,975225,171−3.55% plan?
Oct 5, 2015 SForm 4 →Oct 7, 3:08 pm EDTDeming XiaoPres. of MPS Asia Operations89$52.00$4,628910−8.91% plan?
Sep 16, 2015 SForm 4 →Sep 18, 6:32 pm EDTDeming XiaoPres. of MPS Asia Operations72$51.44$3,704999−6.72% plan?
Sep 11, 2015 SForm 4 →Sep 14, 6:42 pm EDTDeming XiaoPres. of MPS Asia Operations151$49.81$7,5211,071−12.4% plan?
Aug 24, 2015 SForm 4 →Aug 26, 1:56 pm EDTDeming XiaoPres. of MPS Asia Operations15$44.28$6641,222−1.21% plan?
Aug 20, 2015 SForm 4 →Aug 24, 3:54 pm EDTSaria TsengVP & General Counsel110$48.55$5,341233,455−0.05% plan?
Aug 17, 2015 JForm 4 →Aug 26, 1:56 pm EDTDeming XiaoPres. of MPS Asia Operations81$43.02$3,484239,851— plan? late
Aug 17, 2015 JForm 4 →Aug 24, 3:54 pm EDTSaria TsengVP & General Counsel110$43.02$4,732233,565— plan? late
Aug 10, 2015 SForm 4 →Aug 11, 7:04 pm EDTDeming XiaoPres. of MPS Asia Operations1,939$51.30$99,471239,770−0.80% plan?
Aug 10, 2015 SForm 4 →Aug 11, 7:03 pm EDTMaurice SciammasSr. V.P.of Sales and Marketing1,522$51.30$78,079313,280−0.48% plan?
Aug 10, 2015 SForm 4 →Aug 11, 7:02 pm EDTMeera RaoCFO1,319$51.30$67,665188,351−0.70% plan?
Aug 10, 2015 SForm 4 →Aug 11, 7:01 pm EDTSaria TsengVP & General Counsel1,522$51.30$78,079233,455−0.65% plan?
Aug 10, 2015 SForm 4 →Aug 11, 6:56 pm EDTMichael HsingCEO, Director4,530$51.30$232,3891,055,604−0.43% plan?
Aug 6, 2015 SForm 4 →Aug 6, 6:24 pm EDTDeming XiaoPres. of MPS Asia Operations3,386$50.48$170,921241,709−1.38% plan?
Aug 4, 2015 SForm 4 →Aug 6, 6:27 pm EDTMaurice SciammasSr. V.P.of Sales and Marketing4,060$50.50$205,043314,802−1.27% plan?
Aug 4, 2015 SForm 4 →Aug 6, 6:25 pm EDTSaria TsengVP & General Counsel4,060$50.50$205,043234,977−1.70% plan?
Aug 4, 2015 SForm 4 →Aug 6, 6:22 pm EDTMeera RaoCFO3,308$50.50$167,062189,670−1.71% plan?
Aug 4, 2015 SForm 4 →Aug 6, 6:21 pm EDTMichael HsingCEO, Director12,659$50.50$639,3051,060,134−1.18% plan?
Aug 3, 2015 SForm 4 →Aug 5, 6:26 pm EDTDeming XiaoPres. of MPS Asia Operations1,275$50.64$64,5601,237−50.8% plan?
Jul 23, 2015 SForm 4 →Jul 24, 6:40 pm EDTDeming XiaoPres. of MPS Asia Operations11$47.51$5231,344−0.81% plan?
Jul 6, 2015 SForm 4 →Jul 7, 6:23 pm EDTDeming XiaoPres. of MPS Asia Operations82$51.01$4,1831,355−5.71% plan?
Jun 16, 2015 SForm 4 →Jun 17, 7:17 pm EDTDeming XiaoPres. of MPS Asia Operations70$53.26$3,7281,191−5.55% plan?
Jun 11, 2015 SForm 4/A →Jul 7, 6:21 pm EDTDeming XiaoPres. of MPS Asia Operations146$53.18$7,7641,507−8.83% plan?
Jun 11, 2015 MForm 4 →Jun 12, 6:07 pm EDTMaurice SciammasSr. V.P.of Sales and Marketing8,234$12.05$99,243318,862— plan?
Jun 11, 2015 SForm 4 →Jun 12, 6:04 pm EDTDeming XiaoPres. of MPS Asia Operations392$53.18$20,8471,261−23.7% plan? amended
May 26, 2015 SForm 4 →May 28, 5:02 pm EDTDeming XiaoPres. of MPS Asia Operations14$53.85$7541,653−0.84% plan?
May 18, 2015 SForm 4 →May 18, 7:01 pm EDTMeera RaoCFO4,142$54.23$224,629192,978−2.10% plan?
May 14, 2015 SForm 4 →May 18, 6:58 pm EDTVictor K LeeDirector5,705$53.30$304,09420,615−21.7% plan?
May 14, 2015 MForm 4 →May 18, 6:58 pm EDTVictor K LeeDirector5,705$22.92$130,76721,320— plan?
May 14, 2015 SForm 4 →May 18, 6:55 pm EDTJames C MoyerDirector8,000$52.76$422,04671,823−10.0% plan?
May 8, 2015 SForm 4 →May 12, 6:47 pm EDTSaria TsengVP & General Counsel4,490$51.87$232,915239,037−1.84% plan?
May 8, 2015 SForm 4 →May 12, 6:16 pm EDTMeera RaoCFO1,319$51.79$68,311197,120−0.66% plan?
May 8, 2015 SForm 4 →May 12, 3:20 pm EDTMaurice SciammasSr. V.P.of Sales and Marketing1,523$51.79$78,876310,628−0.49% plan?
May 8, 2015 SForm 4 →May 12, 3:12 pm EDTMichael HsingCEO, Director4,530$51.79$234,6091,072,793−0.42% plan?
May 7, 2015 SForm 4 →May 11, 6:33 pm EDTDeming XiaoPres. of MPS Asia Operations10,220$52.05$531,993246,263−3.98% plan?
May 4, 2015 SForm 4 →May 6, 8:06 pm EDTSaria TsengVP & General Counsel4,051$51.68$209,375243,527−1.64% plan?
May 4, 2015 SForm 4 →May 6, 6:46 pm EDTMaurice SciammasSr. V.P.of Sales and Marketing4,051$51.68$209,375312,151−1.28% plan?
May 4, 2015 SForm 4 →May 6, 6:43 pm EDTDeming XiaoPres. of MPS Asia Operations7,451$52.08$388,0451,667−81.7% plan?
May 4, 2015 SForm 4 →May 6, 6:40 pm EDTMeera RaoCFO3,300$51.68$170,555198,439−1.64% plan?
May 4, 2015 SForm 4 →May 6, 6:36 pm EDTMichael HsingCEO, Director12,632$51.73$653,4861,077,323−1.16% plan?
Apr 23, 2015 SForm 4 →Apr 23, 6:21 pm EDTMeera RaoCFO19,773$53.21$1,052,133201,739−8.93% plan?
Apr 21, 2015 SForm 4 →Apr 23, 6:20 pm EDTDeming XiaoPres. of MPS Asia Operations27,070$54.00$1,461,7851,780−93.8% plan?
Apr 13, 2015 SForm 4 →Apr 15, 6:20 pm EDTJames C MoyerDirector9,200$51.83$476,79279,823−10.3% plan?
Apr 9, 2015 SForm 4 →Apr 13, 6:45 pm EDTMichael HsingCEO, Director7,025$52.01$365,3741,142,019−0.61% plan?
Apr 9, 2015 MForm 4 →Apr 13, 6:45 pm EDTMichael HsingCEO, Director10,507$15.03$157,9201,149,044— plan?
Apr 6, 2015 SForm 4 →Apr 8, 6:57 pm EDTMichael HsingCEO, Director72,404$52.03$3,767,3151,138,537−5.98% plan?
Apr 6, 2015 MForm 4 →Apr 8, 6:57 pm EDTMichael HsingCEO, Director108,309$15.03$1,627,8841,142,188— plan?
Apr 6, 2015 SForm 4 →Apr 8, 6:02 pm EDTDeming XiaoPres. of MPS Asia Operations97$51.28$4,9741,792−5.13% plan?
Apr 1, 2015 SForm 4 →Apr 3, 5:33 pm EDTMichael HsingCEO, Director130,560$52.01$6,790,0211,102,632−10.6% plan?
Apr 1, 2015 MForm 4 →Apr 3, 5:33 pm EDTMichael HsingCEO, Director195,301$15.03$2,935,3741,174,182— plan?
Mar 30, 2015 SForm 4 →Mar 31, 7:21 pm EDTDeming XiaoPres. of MPS Asia Operations10,696$53.00$566,894290,879−3.55% plan?
Mar 19, 2015 SForm 4 →Mar 23, 1:51 pm EDTJames C MoyerDirector9,200$55.18$507,68889,023−9.37% plan?

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Oct 25, 2018 AMForm 4 →Oct 29, 7:16 pm EDTMaurice SciammasSr. V.P.of Sales and Marketing75,960——48,000—
Oct 25, 2018 AMForm 4 →Oct 29, 7:16 pm EDTDeming XiaoPres. of MPS Asia Operations75,960——48,000—
Oct 25, 2018 AForm 4 →Oct 29, 7:15 pm EDTTheodore BlegenCFO48,000——48,000—
Oct 25, 2018 AMForm 4 →Oct 29, 7:11 pm EDTSaria TsengVP & General Counsel75,960——48,000—
Oct 25, 2018 AMForm 4 →Oct 29, 7:07 pm EDTMichael HsingCEO, Director159,265——108,000—
Feb 7, 2017 MForm 4 →Feb 8, 5:38 pm ESTDeming XiaoPres. of MPS Asia Operations4,876——56,174—
Feb 7, 2017 MForm 4 →Feb 8, 5:17 pm ESTMaurice SciammasSr. V.P.of Sales and Marketing4,876——56,174—
Feb 7, 2017 MForm 4 →Feb 8, 5:15 pm ESTMichael HsingCEO, Director8,939——102,987—
Feb 7, 2017 MForm 4 →Feb 8, 5:07 pm ESTSaria TsengVP & General Counsel4,876——56,174—
Nov 22, 2016 MForm 4 →Nov 23, 12:12 pm ESTVictor K LeeDirector4,504——0—
Nov 18, 2016 MForm 4 →Nov 22, 7:57 pm ESTVictor K LeeDirector2,315——3,328—
Oct 28, 2016 MForm 4 →Nov 1, 6:57 pm EDTMichael HsingCEO, Director26,817——111,926—
Oct 28, 2016 MForm 4 →Nov 1, 6:52 pm EDTDeming XiaoPres. of MPS Asia Operations14,628——61,050—
Oct 28, 2016 MForm 4 →Nov 1, 6:51 pm EDTMaurice SciammasSr. V.P.of Sales and Marketing14,628——61,050—
Oct 28, 2016 MForm 4 →Nov 1, 6:43 pm EDTSaria TsengVP & General Counsel14,628——61,050—
May 26, 2016 MForm 4 →May 27, 6:08 pm EDTVictor K LeeDirector9,357——5,643—
May 23, 2016 MForm 4 →May 25, 5:13 pm EDTVictor K LeeDirector10,000——15,000—
Dec 31, 2015 AForm 4 →Jan 5, 2016, 6:25 pm ESTDeming XiaoPres. of MPS Asia Operations75,678——75,678—
Dec 31, 2015 AForm 4 →Jan 5, 2016, 6:24 pm ESTSaria TsengVP & General Counsel75,678——75,678—
Dec 31, 2015 AForm 4 →Jan 5, 2016, 6:22 pm ESTMeera RaoCFO63,065——63,065—
Dec 31, 2015 AForm 4 →Jan 5, 2016, 6:21 pm ESTMaurice SciammasSr. V.P.of Sales and Marketing75,678——75,678—
Dec 31, 2015 AForm 4 →Jan 5, 2016, 6:19 pm ESTMichael HsingCEO, Director138,743——138,743—
Dec 17, 2015 MForm 4 →Dec 21, 5:13 pm ESTMeera RaoCFO36,000——0—
Dec 17, 2015 MForm 4 →Dec 21, 5:12 pm ESTMaurice SciammasSr. V.P.of Sales and Marketing43,200——0—
Dec 17, 2015 MForm 4 →Dec 21, 5:11 pm ESTDeming XiaoPres. of MPS Asia Operations43,200——0—
Dec 17, 2015 MForm 4 →Dec 21, 5:11 pm ESTMichael HsingCEO, Director110,000——0—
Dec 17, 2015 MForm 4 →Dec 21, 5:10 pm ESTSaria TsengVP & General Counsel43,200——0—
Nov 24, 2015 MForm 4 →Nov 24, 8:08 pm ESTVictor K LeeDirector2,582——0—
Nov 5, 2015 MForm 4 →Nov 6, 7:08 pm ESTVictor K LeeDirector20,000——1,406—
Oct 30, 2015 MForm 4 →Nov 2, 7:17 pm ESTVictor K LeeDirector3,594——21,406—
Jun 11, 2015 MForm 4 →Jun 12, 6:07 pm EDTMaurice SciammasSr. V.P.of Sales and Marketing8,234——0—
May 14, 2015 MForm 4 →May 18, 6:58 pm EDTVictor K LeeDirector5,705——0—
Apr 9, 2015 MForm 4 →Apr 13, 6:45 pm EDTMichael HsingCEO, Director10,507——0—
Apr 6, 2015 MForm 4 →Apr 8, 6:57 pm EDTMichael HsingCEO, Director108,309——10,507—
Apr 1, 2015 MForm 4 →Apr 3, 5:33 pm EDTMichael HsingCEO, Director195,301——118,816—
Mar 18, 2015 MForm 4 →Mar 20, 1:45 pm EDTDeming XiaoPres. of MPS Asia Operations43,200——43,200—
Feb 24, 2015 MForm 4 →Feb 25, 1:41 pm ESTVictor K LeeDirector5,000——5,000—
Feb 19, 2015 MForm 4 →Feb 23, 2:09 pm ESTPilkington Karen A Smith-Director15,705——0—
Feb 13, 2015 MForm 4 →Feb 17, 7:17 pm ESTVictor K LeeDirector5,000——10,000—
Feb 5, 2015 MForm 4 →Feb 9, 8:26 pm ESTMaurice SciammasSr. V.P.of Sales and Marketing1,103——0—
Feb 3, 2015 MForm 4 →Mar 20, 2:03 pm EDTMeera RaoCFO72,000——36,000— late
Feb 3, 2015 MForm 4 →Mar 20, 2:01 pm EDTMaurice SciammasSr. V.P.of Sales and Marketing86,400——43,200— late
Feb 3, 2015 MForm 4 →Mar 20, 1:41 pm EDTMichael HsingCEO, Director220,000——110,000— late
Feb 3, 2015 MForm 4 →Mar 20, 1:24 pm EDTSaria TsengVP & General Counsel86,400——43,200— late
Feb 3, 2015 MForm 4 →Mar 18, 6:05 pm EDTDeming XiaoPres. of MPS Asia Operations43,200——86,400— late