X0306 4 2021-02-02 0 0001280452 MONOLITHIC POWER SYSTEMS INC MPWR 0001415033 BLEGEN THEODORE 5808 LAKE WASHINGTON BLVD NE KIRKLAND WA 98033 0 1 0 0 CFO Common Stock 2021-02-02 4 M 0 20105 0.0 A 135845 D Common Stock 2021-02-02 4 A 0 41196 30.0 A 177041 D Performance Shares 2021-02-02 4 M 0 20105 0.0 D Common Stock 20105 0 D On July 21, 2020, the reporting person was granted a target number of 4,021 performance units and can earn up to a maximum of 20,105 performance units subject to price targets ranging from $260 to $300 over a performance period from July 21, 2020 to July 20, 2023. In addition, all performance units are subject to the achievement of a business operating goal with a performance period through December 31, 2021. 75% of the performance units are subject to time-based vesting and require service through July 20, 2023, and the remaining 25% of the performance units are subject to time-based vesting and require service through July 20, 2024. Once vested, the performance units have a post-vesting sales restriction period of one year. On February 2, 2021, the Compensation Committee determined that the five price targets and the operating goal had been satisfied, which resulted in 20,105 units being credited, subject to time based vesting above. On February 11, 2019, the reporting person was granted a target of 13,732 shares of restricted stock units, with the right to earn up to 300% of the target shares, subject to satisfaction of pre-determined, performance-based vesting criteria. On February 2, 2021, the Company's Compensation Committee of the Board of Directors determined and approved the achievement of the performance criteria for the restricted stock units, which resulted in 27,464 additional shares being earned by the reporting person. Of the restricted stock units that were awarded, 20,598 will vest immediately and 20,598 will vest quarterly in the next two years. By: Saria Tseng For: Bernie Blegen 2021-02-04