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MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2025
Dec 3, 2025
30057_dirs_2025-12-02_669af11b-fac7-4e19-bf28-d8708a3811f1.zip
Director's Dealing
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SEC Form 4 — Statement of Changes in Beneficial Ownership
Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2025-12-01
Reporting Person: BLEGEN THEODORE (N/A)
Non-Derivative Transactions
| Date | Security | Code | Shares | Price | A/D | Holdings After | Ownership |
|---|---|---|---|---|---|---|---|
| 2025-12-01 | Common Stock | S | 40 | $899.73 | Disposed | 74292 | Direct |
| 2025-12-01 | Common Stock | S | 40 | $900.88 | Disposed | 74252 | Direct |
| 2025-12-01 | Common Stock | S | 80 | $901.88 | Disposed | 74172 | Direct |
| 2025-12-01 | Common Stock | S | 40 | $902.31 | Disposed | 74132 | Direct |
| 2025-12-01 | Common Stock | S | 120 | $904.38 | Disposed | 74012 | Direct |
| 2025-12-01 | Common Stock | S | 80 | $906.84 | Disposed | 73932 | Direct |
| 2025-12-01 | Common Stock | S | 80 | $907.59 | Disposed | 73852 | Direct |
| 2025-12-01 | Common Stock | S | 480 | $908.69 | Disposed | 73372 | Direct |
| 2025-12-01 | Common Stock | S | 1984 | $909.00 | Disposed | 71388 | Direct |
| 2025-12-01 | Common Stock | S | 56 | $911.59 | Disposed | 71332 | Direct |
Holdings (Non-Derivative)
| Security | Shares | Ownership |
|---|---|---|
| Common Stock | 5331 | Indirect |
| Common Stock | 5331 | Indirect |
Footnotes
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 $907.49 to $907.68. 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 $908.52 to $908.75. 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.