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Home > Insider Trading > Filing (0001280452-10-000076)

Filing Details

Accession Number:: 0001280452-10-000076
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2010-03-25 13:00:00
Reporting Period:: 2010-02-16

Filing Date:: 2010-03-25
Accepted Time:: 2010-03-25 18:14:47
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
1312593	Saria Tseng	6409 Guadalupe Mines Road San Jose CA 95120	Vp & General Counsel	No	Yes	No	No

Reported Non-Derivative Transactions

Show Other Fields >>

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2010-02-16	916	$18.41	16,054	No	4	J	Direct
Common Stock	Acquisiton	2010-03-25	6,800	$16.00	52,854	No	4	M	Direct
Common Stock	Disposition	2010-03-25	9,533	$23.22	43,321	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	J	Direct
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	2010-03-25	6,800	$0.00	6,800	$16.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
30,200	2009-07-27	2014-07-27	No	4	M	Direct

Footnotes

Acquired through the Company's qualified ESPP program.
In accordance with the reporting person's 10b5-1 trading plan.