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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1038074	Silicon Laboratories Inc	SLAB	Semiconductors & Related Devices (3674)	742793174

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1250012	P William Wood	300 West Sixth St Ste 2300 Austin TX 78701		Yes	No	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, $0.0001 Par Value	Acquisiton	2010-01-15	5,000	$31.00	10,388	No	4	M	Direct
Common Stock, $0.0001 Par Value	Disposition	2010-01-15	5,000	$45.57	5,388	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

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock, $0.0001 Par Value	Non-Qualified Stock Option (right to buy)	Disposition	2010-01-15	5,000	$0.00	5,000	$31.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2000-03-23	2010-03-23	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock, $0.0001 Par Value	155,776	Indirect	by Silverton Partners, LP

Footnotes

Shares sold pursuant to Reporting Person's 10b5-1 Trading Plan.
Reporting Person is a general partner of Silverton Partners, LP. Reporting Person may be deemed a beneficial owner of the shares held by Silverton Partners, LP, but disclaims beneficial ownership in the shares held by Silverton Partners, LP, except to the extent of any indirect pecuniary interest therein.
Option is immediately exercisable, but the shares vest in four equal annual installments upon each anniversary of March 23, 2000.
Not applicable per instruction 4(c)(iii).