Form 4 for MPWR Monolithic Power Systems
Accepted 2026-01-06 00:00:00 ET · period of report 2026-01-02 · accession 0001214659-26-000197 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M | 2026-01-06 | 2026-01-02 | MPWR | BLEGEN THEODORE | EVP, CFO | S - Sale | $940.47 | -3,000 | 69.1K | -4% | -$2.82M |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-01-02 | S | D | 40 | $945.00 | 68,412 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025. |
| 2 | Common | Common Stock | 2026-01-02 | S | D | 80 | $946.62 | 68,332 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025. |
| 3 | Common | Common Stock | 2026-01-02 | S | D | 80 | $927.61 | 71,252 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025. |
| 4 | Common | Common Stock | 2026-01-02 | S | D | 194 | $930.86 | 71,058 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025. |
| 5 | Common | Common Stock | 2026-01-02 | S | D | 80 | $933.64 | 70,978 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025. |
| 6 | Common | Common Stock | 2026-01-02 | S | D | 650 | $944.35 | 68,452 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025. (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 $944.01 to $944.51. 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. |
| 7 | Common | Common Stock | 2026-01-02 | S | D | 74 | $942.42 | 69,641 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025. (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 $942.01 to $942.77. 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. |
| 8 | Common | Common Stock | 2026-01-02 | S | D | 406 | $941.60 | 69,715 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025. (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 $941.00 to $941.67. 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. |
| 9 | Common | Common Stock | 2026-01-02 | S | D | 40 | $940.03 | 70,121 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025. |
| 10 | Common | Common Stock | 2026-01-02 | S | D | 117 | $939.75 | 70,161 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025. (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 $939.51 to $939.99. 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. |
| 11 | Common | Common Stock | 2026-01-02 | S | D | 460 | $938.52 | 70,278 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025. (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 $938.14 to $938.69. 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. |
| 12 | Common | Common Stock | 2026-01-02 | S | D | 120 | $936.50 | 70,738 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025. |
| 13 | Common | Common Stock | 2026-01-02 | S | D | 80 | $935.33 | 70,858 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025. (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 $935.08 to $935.57. 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. |
| 14 | Common | Common Stock | 2026-01-02 | S | D | 40 | $934.74 | 70,938 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025. |
| 15 | Common | Common Stock | 2026-01-02 | S | D | 539 | $943.71 | 69,102 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025. (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 $943.37 to $943.85. 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. |