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Home > Insider Trading > Filing (0001280452-10-000119)

Filing Details

Accession Number:: 0001280452-10-000119
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2010-04-14 13:00:00
Reporting Period:: 2010-04-14

Filing Date:: 2010-04-14
Accepted Time:: 2010-04-14 13:32:19
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
1308676	Michael Hsing	6409 Guadalupe Mines Road San Jose CA 95120	Ceo	Yes	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	Explanation
Common Stock	Acquisiton	2010-04-14	30,000	$5.00	312,842	No	4	M	Direct
Common Stock	Disposition	2010-04-14	30,000	$24.25	282,842	No	4	S	Direct

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

Reported Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2010-04-14	30,000	$0.00	30,000	$5.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
270,000	2005-01-13	2014-01-13	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	498,566	Indirect	By Jointly w/Spouse
Common Stock	133,040	Indirect	By S. Hsing 04 Trust
Common Stock	133,040	Indirect	by M Hsing 04 Trust

Footnotes

In accordance with the reporting person's 10b5-1 trading plan.