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Filing Details

Accession Number:: 0001280452-17-000022
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2017-02-08 17:38:57
Reporting Period:: 2017-02-06

Filing Date:: 2017-02-08
Accepted Time:: 2017-02-08 17:38:57
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1280452	Monolithic Power Systems Inc	MPWR	Semiconductors & Related Devices (3674)	770466789

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1308647	Deming Xiao	79 Great Oaks Blvd San Jose CA 95119	Pres. Of Mps Asia Operations	No	Yes	No	No

Reported Non-Derivative Transactions

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Disposition	2017-02-06	5,517	$88.25	266,873	No	4	S	Direct
Common Stock	Acquisiton	2017-02-07	68,604	$0.00	335,477	No	4	A	Direct
Common Stock	Acquisiton	2017-02-07	4,876	$0.00	340,353	No	4	M	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	S	Direct
No	4	A	Direct
No	4	M	Direct

Reported Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Performance Shares	Disposition	2017-02-07	4,876	$0.00	4,876	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
56,174			No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	2,197	Indirect	by Spouse

Footnotes

The reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plans.
On February 3, 2015, the reporting person was granted a target of 24,213 shares of restricted stock units subject to satisfaction of pre-determined, performance-based vesting criteria. On February 7, 2017, the Company's Board of Directors determined that those performance criteria for the restricted stock units had been satisfied, which resulted in 44,391 additional shares being achieved and granted to the reporting person. Of the restricted stock units that were awarded, 34,302 will vest immediately and 34,302 will vest quarterly in the next two years.
On December 31, 2015, the reporting person was granted a target of 75,678 shares of restricted stock units in four tranches subject to satisfaction of share price targets over the next four years. The vesting of restricted stock units in the second, third and fourth tranches is also subject to the satisfaction of certain operational goals, as determined by the Compensation Committee of the Company. All restricted stock units are subject to time based vesting. Once vested, one-third of shares have no sales restrictions and are sellable on January 1, 2020, one-third of the shares have sales restrictions until January 1, 2021 and one-third of the shares have sales restrictions until January 1, 2022.On February 7, 2017, the Compensation Committee of the Company determined that one of the five share price targets for the first tranche of restricted stock units had been satisfied, which resulted in 4,876 shares being granted, subject to time based vesting described above.