Home > Insider Trading > Filing (0001280452-13-000228)

Filing Details

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
1308676	Michael Hsing	79 Great Oaks Blvd San Jose CA 95119	Ceo	Yes	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2013-08-05	862	$26.03	584,261	No	4	S	Direct
Common Stock	Disposition	2013-08-06	2,066	$26.20	582,195	No	4	S	Direct

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

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	465,566	Indirect	By Jointly w/Spouse
Common Stock	133,040	Indirect	By S. Hsing 04 Trust
Common Stock	29,000	Indirect	Hsing Fam Foundation
Common Stock	133,040	Indirect	by M Hsing 04 Trust

Footnotes

Shares sold to pay tax obligations resulting from the vesting of restricted stock units.
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 $26.03 to $26.0302. 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.