Monolithic Power Systems, Inc. (MPWR)
NasdaqGS · Price as of · Delayed Quote
- Profitability13/20
Profitable but shrinking: $793.8M over the last four reported quarters, down from $1.70B the year before.
- Insider buying vs selling11/20
Insiders are sellers only: 52 sells worth $120.4M, no open-market buys, across the last 20 Form 4s. Routine executive selling is common, so this is only a mild negative. Separately, 3 new 5%+ stake disclosures (13D/13G) hit in the last 6 months, which is big-money accumulation.
- Dilution and offerings11/15
Share count up 2.6% in a year. Mild dilution.
- Analysts15
- Implied upside+49.0%
- Target range$1,575.00 to $2,100.00
- EPS expected$7.70 +63%
- A year ago$4.73
- Revenue expected$1.14B +55%
- Estimate range$7.66 to $7.80
MPWR closed at $1,234.46 on Sep 11, down 13.4% since Aug 12. Chart read: price below both the 50-day and 200-day moving averages; the 50-day is above the 200-day (uptrend structure); trading at 47% of the 52-week range ($834.14 to $1689.89).
Insider buying and selling at Monolithic Power Systems, Inc. (MPWR)
The most recent Form 4 on record for Monolithic Power Systems, Inc. (MPWR) is May 18, 2026, when Michael Hsing, CEO, sold $59.3M of stock. Nothing in the filing ties this one to a pre-arranged plan, so it was the filer's own call.
| Insider | Action | Value | Date | Type |
|---|---|---|---|---|
| Michael Hsing · CEO | Sell | $59.3M | May 18, 2026 | Red flag |
| Deming Xiao · EVP, Global Operations | Sell | $49.6M | May 6, 2026 | Red flag |
| Michael Hsing · CEO | Sell | $39.2M | February 11, 2026 | Routine |
| Michael Hsing · CEO | Sell | $38.8M | February 10, 2026 | Routine |
| Michael Hsing · CEO | Sell | $64.3M | February 6, 2026 | No decision |
Filed notices to sell
A Form 144 is filed beforean insider sells restricted stock. The Form 4 reporting the completed trade isn't due until two business days after the sale, so these land first. They are intentions, not transactions.
| Insider | Value | Filed | Status | Type |
|---|---|---|---|---|
| DEAN ROBERT W II · Officer | $41,527 | August 24, 2026 | Not yet reported | Vested shares |
| DEAN ROBERT W II · Officer | $8,128 | August 17, 2026 | Not yet reported | Vested shares |
| CHANG KUO WEI HERBERT · Director | $142,000 | August 11, 2026 | Executed | Vested shares |
| DEAN ROBERT W II · Officer | $141,148 | August 5, 2026 | Executed | Vested shares |
| Sciammas Maurice · Officer | $20.2M | July 15, 2026 | Not yet reported | Routine |
Congress trades in MPWR
| Date | Member | Action | Amount | |
|---|---|---|---|---|
| 2026-06-05 | Byron Donalds FL | Sale | $1,001 - $15,000 | |
| 2026-06-05 | Byron Donalds FL | Sale | $1,001 - $15,000 |
SEC filings
| Form | Filed | Description |
|---|---|---|
| 8-K | September 10, 2026 | 8-K |
| 4 | September 2, 2026 | PRIMARY DOCUMENT |
| 4 | August 26, 2026 | PRIMARY DOCUMENT |
| 4 | August 25, 2026 | PRIMARY DOCUMENT |
| 144 | August 24, 2026 | View on EDGAR |
| 4 | August 19, 2026 | PRIMARY DOCUMENT |
| 144 | August 17, 2026 | View on EDGAR |
| 4 | August 13, 2026 | PRIMARY DOCUMENT |
Frequently asked questions
When does MPWR report earnings?
Monolithic Power Systems, Inc. (MPWR) is scheduled to report quarterly results on October 29, 2026, after the close. The 14-analyst consensus is $7.70 per share on revenue of $1.14B for the quarter ending September 30, 2026, against $4.73 and $737.2M a year earlier. It has beaten the consensus EPS estimate in all four of the last four quarters.
What do analysts expect for MPWR?
15 analysts cover Monolithic Power Systems, Inc. (MPWR). The consensus rating is Strong buy. The average price target is $1,839.80, in a range of $1,575.00 to $2,100.00.
Are insiders buying or selling MPWR?
We track Form 4 filings for Monolithic Power Systems, Inc. (MPWR). The activity listed on this page shows 5 qualifying sales. Each row is labelled Routine when the filer declared a pre-arranged 10b5-1 plan, Tax withholding when shares were sold automatically to cover the tax on a vest, or Own call when neither applies.
Where can I see MPWR SEC filings?
Recent filings are listed on this page, newest first. The latest is an 8-K filed September 10, 2026.