Company
MPWR · CIK 0001280452
Sale of 596 shares at $1,323.31 per share.
Reporting Person Hsing Michael · Officer Title CEO · Transaction Code S
Traded Sep 28, 2026 · Disclosed Sep 30, 2026
Source: SEC Form 4 · 0001214659-26-012375 · filed 2026-09-30 · View filing →
Sale of 2,121 shares at $1,328.54 per share.
Reporting Person Hsing Michael · Officer Title CEO · Transaction Code S
Traded Sep 28, 2026 · Disclosed Sep 30, 2026
Source: SEC Form 4 · 0001214659-26-012375 · filed 2026-09-30 · View filing →
Sale of 1,111 shares at $1,333.34 per share.
Reporting Person Hsing Michael · Officer Title CEO · Transaction Code S
Traded Sep 28, 2026 · Disclosed Sep 30, 2026
Source: SEC Form 4 · 0001214659-26-012375 · filed 2026-09-30 · View filing →
Sale of 2,949 shares at $1,338.66 per share.
Reporting Person Hsing Michael · Officer Title CEO · Transaction Code S
Traded Sep 28, 2026 · Disclosed Sep 30, 2026
Source: SEC Form 4 · 0001214659-26-012375 · filed 2026-09-30 · View filing →
Sale of 5,783 shares at $1,343.76 per share.
Reporting Person Hsing Michael · Officer Title CEO · Transaction Code S
Traded Sep 28, 2026 · Disclosed Sep 30, 2026
Source: SEC Form 4 · 0001214659-26-012375 · filed 2026-09-30 · View filing →
Sale of 6,343 shares at $1,347.15 per share.
Reporting Person Hsing Michael · Officer Title CEO · Transaction Code S
Traded Sep 28, 2026 · Disclosed Sep 30, 2026
Source: SEC Form 4 · 0001214659-26-012375 · filed 2026-09-30 · View filing →
Sale of 10,967 shares at $1,351.43 per share.
Reporting Person Hsing Michael · Officer Title CEO · Transaction Code S
Traded Sep 28, 2026 · Disclosed Sep 30, 2026
Source: SEC Form 4 · 0001214659-26-012375 · filed 2026-09-30 · View filing →
Sale of 130 shares at $1,356.94 per share.
Reporting Person Hsing Michael · Officer Title CEO · Transaction Code S
Traded Sep 28, 2026 · Disclosed Sep 30, 2026
Source: SEC Form 4 · 0001214659-26-012375 · filed 2026-09-30 · View filing →
Sale of 32 shares at $1,297.72 per share.
Reporting Person DEAN ROBERT W II · Officer Title Interim CFO · Transaction Code S
Traded Aug 24, 2026 · Disclosed Aug 26, 2026
Source: SEC Form 4 · 0001214659-26-010932 · filed 2026-08-26 · View filing →
Sale of 50 shares at $1,281.57 per share.
Reporting Person CHANG KUO WEI HERBERT · Transaction Code S
Traded Aug 24, 2026 · Disclosed Aug 25, 2026
Source: SEC Form 4 · 0001214659-26-010853 · filed 2026-08-25 · View filing →
Sale of 6 shares at $1,413.64 per share.
Reporting Person DEAN ROBERT W II · Officer Title Interim CFO · Transaction Code S
Traded Aug 17, 2026 · Disclosed Aug 19, 2026
Source: SEC Form 4 · 0001214659-26-010630 · filed 2026-08-19 · View filing →
Sale of 50 shares at $1,420 per share.
Reporting Person CHANG KUO WEI HERBERT · Transaction Code S
Traded Aug 11, 2026 · Disclosed Aug 13, 2026
Source: SEC Form 4 · 0001214659-26-010101 · filed 2026-08-13 · View filing →
Sale.
Filer Byron Donalds · Chamber House · District FL19 · Transaction Type Sale · Asset Type Stock
Traded Jun 5, 2026 · Disclosed Jul 15, 2026FILED +40 DAYS
Source: House Clerk PTR · 20034968 · filed 2026-07-15 · View filing →
Sale.
Filer Byron Donalds · Chamber House · District FL19 · Owner Spouse · Transaction Type Sale · Asset Type Stock
Traded Jun 5, 2026 · Disclosed Jul 15, 2026FILED +40 DAYS
Source: House Clerk PTR · 20034968 · filed 2026-07-15 · View filing →
Purchase.
Filer Markwayne Mullin · Chamber Senate · District OK · Owner Joint · Transaction Type Purchase · Asset Type Stock
Traded Feb 4, 2026 · Disclosed Mar 2, 2026FILED +26 DAYS
Source: Senate eFD PTR · 315cd41e-0e2e-492b-9fc6-32bb92100734 · filed 2026-03-02 · View filing →
Purchase.
Filer Markwayne Mullin · Chamber Senate · District OK · Owner Self · Transaction Type Purchase · Asset Type Stock
Traded Jan 5, 2026 · Disclosed Feb 4, 2026FILED +30 DAYS
Source: Senate eFD PTR · 98b3317b-2632-48c3-b636-d5555c4680ca · filed 2026-02-04 · View filing →
Purchase.
Filer Markwayne Mullin · Chamber Senate · District OK · Owner Spouse · Transaction Type Purchase · Asset Type Stock
Traded Jan 5, 2026 · Disclosed Feb 4, 2026FILED +30 DAYS
Source: Senate eFD PTR · 98b3317b-2632-48c3-b636-d5555c4680ca · filed 2026-02-04 · View filing →
Purchase.
Filer Markwayne Mullin · Chamber Senate · District OK · Owner Self · Transaction Type Purchase · Asset Type Stock
Traded Jan 5, 2026 · Disclosed Feb 3, 2026FILED +29 DAYS
Source: Senate eFD PTR · 98b3317b-2632-48c3-b636-d5555c4680ca · filed 2026-02-03 · View filing →
Purchase.
Filer Markwayne Mullin · Chamber Senate · District OK · Owner Spouse · Transaction Type Purchase · Asset Type Stock
Traded Jan 5, 2026 · Disclosed Feb 3, 2026FILED +29 DAYS
Source: Senate eFD PTR · 98b3317b-2632-48c3-b636-d5555c4680ca · filed 2026-02-03 · View filing →
MONOLITHIC POWER SYSTEMS, INC.