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Total Value
$20.2M
Net $20.2M sold
Filing Date
Jul 17, 2026
18 transactions
Sales
$20.2M
18 transactions
Trade Summary
On Jul 15, 2026, Sciammas Maurice, Insider, sold $20.2M of MONOLITHIC POWER SYSTEMS, INC. (MPWR) across 18 transactions. The filing covers Common Stock and reflects net selling of $20.2M. Reported prices ranged from $1314.03 to $1405.71. Insider transactions are sourced from SEC Form 4 disclosures and should be reviewed alongside company fundamentals and the insider's broader trading history.
Company Information
- Company Name
- MONOLITHIC POWER SYSTEMS, INC.
- Ticker Symbol
- MPWR
- CIK
- 0001280452
Insider Information
- Name
- Sciammas Maurice
- Role
- Insider
- Location
- WEST PALM BEACH, FL
Filing Details
- Filing Date
- Jul 17, 2026
- Transaction Date
- Jul 15, 2026
- Accession Number
- 0001214659-26-008703
- Form Type
- 4
- Net Trading Amount
- -$20.2M
Non-Derivative Transactions
| Date | Security | Shares | Price | Type | Value |
|---|---|---|---|---|---|
| Jul 15, 2026 | Common Stock | 527 | $1314.03 | Sale | $692.5K |
| Jul 15, 2026 | Common Stock | 274 | $1318.42 | Sale | $361.2K |
| Jul 15, 2026 | Common Stock | 409 | $1323.93 | Sale | $541.5K |
| Jul 15, 2026 | Common Stock | 464 | $1329.30 | Sale | $616.8K |
| Jul 15, 2026 | Common Stock | 776 | $1334.59 | Sale | $1.0M |
| Jul 15, 2026 | Common Stock | 1,460 | $1339.59 | Sale | $2.0M |
| Jul 15, 2026 | Common Stock | 1,864 | $1344.16 | Sale | $2.5M |
| Jul 15, 2026 | Common Stock | 1,506 | $1348.91 | Sale | $2.0M |
| Jul 15, 2026 | Common Stock | 5,640 | $1352.95 | Sale | $7.6M |
| Jul 15, 2026 | Common Stock | 50 | $1359.36 | Sale | $68.0K |
| Jul 15, 2026 | Common Stock | 240 | $1369.18 | Sale | $328.6K |
| Jul 15, 2026 | Common Stock | 472 | $1375.47 | Sale | $649.2K |
| Jul 15, 2026 | Common Stock | 418 | $1378.73 | Sale | $576.3K |
| Jul 15, 2026 | Common Stock | 410 | $1384.11 | Sale | $567.5K |
| Jul 15, 2026 | Common Stock | 50 | $1388.19 | Sale | $69.4K |
| Jul 15, 2026 | Common Stock | 213 | $1396.16 | Sale | $297.4K |
| Jul 15, 2026 | Common Stock | 117 | $1400.45 | Sale | $163.9K |
| Jul 15, 2026 | Common Stock | 110 | $1405.71 | Sale | $154.6K |
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Footnotes
- (F1)This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025.
- (F2)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,311.45 to $1,316.40 The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F3)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,316.56 to $1,321.56. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F4)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,321.72 to $1,326.11. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F5)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,326.94 to $1,331.90. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F6)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,331.95 to $1,336.95. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F7)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,336.97 to $1,341.96. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F8)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,341.99 to $1,346.96. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F9)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,347.09 to $1,352.00. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F10)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,352.13 to $1,357.03. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F11)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,357.88 to $1,362.57. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F12)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,366.15 to $1,371.04. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F13)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,371.23 to $1,376.20. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F14)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,376.51 to $1,381.11. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F15)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,381.79 to $1,386.22. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F16)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,388.18 to $1,388.22. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F17)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,393.94 to $1,398.92. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F18)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,398.97 to $1,400.85. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- (F19)The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,404.25 to $1,406.04. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.