Monolithic Power Systems Inc.
Last updated September 27, 2026
Organization details
- Legal name
- Monolithic Power Systems Inc.
- Ownership
- Public
- Status
- Active
- SIC code
- 3674 — Semiconductors & Related Devices
- Jurisdiction of incorporation
- Delaware
- Headquarters city
- West Palm Beach
- Headquarters state / province
- Florida
- Headquarters country
- United States
- Fiscal year end
- December
- Ticker symbol
- MPWR
- Primary stock exchange
- Nasdaq
Identifiers
- SEC CIK
- 0001280452
- EIN
- 77-0466789
- Wikidata ID
- Q22058448
Board of directors
-
Carintia Martinez · DirectorSince 2023
-
Eileen Wynne · DirectorSince 2023
-
Eugen J. Elmiger · DirectorSince 2023
-
James C. Moyer · DirectorSince 2023
-
Jeff Zhou · DirectorSince 2023
-
Kuo Wei Herbert Chang · DirectorSince 2023
-
Michael Hsing · Director · CEOSince 2023
-
Victor K. Lee · DirectorSince 2023
Chief executives
Michael Hsing
· CEO
Dates unknown
Director election results
Annual meeting of June 11, 2026. Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
-
89.9%
-
94.1%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
- Bought, last 12 months
- $0
- 0 purchases by 0 insiders
- Sold, last 12 months
- $708,678,511
- 322 sales by 11 insiders
| Date | Insider | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Aug 31, 2026 | Tseng Saria Officer (EVP & General Counsel) | Gift | −2,000 | — | — |
| Aug 31, 2026 | Tseng Saria Officer (EVP & General Counsel) | Gift | +2,000 | — | — |
| Aug 24, 2026 | Kuo Wei Herbert Chang Director | Open-market sale | −50 | $1,281.57 | $64,079 |
| Aug 24, 2026 | DEAN ROBERT W II Officer (Interim CFO) | Open-market sale | −32 | $1,297.72 | $41,527 |
| Aug 24, 2026 | DEAN ROBERT W II Officer (Interim CFO) | Other | −5 | — | — |
| Aug 17, 2026 | DEAN ROBERT W II Officer (Interim CFO) | Open-market sale | −6 | $1,413.64 | $8,482 |
| Aug 11, 2026 | Kuo Wei Herbert Chang Director | Open-market sale | −50 | $1,420.00 | $71,000 |
| Aug 5, 2026 | DEAN ROBERT W II Officer (Interim CFO) | Open-market sale | −105 | $1,344.27 | $141,148 |
| Aug 4, 2026 | Sciammas Maurice Officer (EVP, WW Sales & Marketing) | Gift | −25,000 | — | — |
| Aug 4, 2026 | Sciammas Maurice Officer (EVP, WW Sales & Marketing) | Gift | +25,000 | — | — |
| Aug 3, 2026 | Sciammas Maurice Officer (EVP, WW Sales & Marketing) | Open-market sale | −30 | $1,343.94 | $40,318 |
| Jul 25, 2026 | DEAN ROBERT W II Officer (Interim CFO) | Grant or award | +1,359 | — | — |
| Jul 15, 2026 | Sciammas Maurice Officer (EVP, WW Sales & Marketing) | Open-market sale | −527 | $1,314.03 | $692,494 |
| Jul 15, 2026 | Sciammas Maurice Officer (EVP, WW Sales & Marketing) | Open-market sale | −274 | $1,318.42 | $361,247 |
| Jul 15, 2026 | Sciammas Maurice Officer (EVP, WW Sales & Marketing) | Open-market sale | −409 | $1,323.93 | $541,487 |
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