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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
1255711	G Laurence Walker	22 Normandie Rd Dover PA 02030		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	2012-07-25	2,000	$26.19	5,625	No	4	M	Direct
Common Stock, $0.0001 Par Value	Disposition	2012-07-25	2,000	$39.04	3,625	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	2012-07-25	2,000	$0.00	2,000	$26.19

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
19,000	2003-06-12	2013-06-12	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock, $0.0001 Par Value	8,253	Indirect	LGW 2001 Revocable Trust

Footnotes

Shares sold pursuant to Reporting Person's 10b5-1 Trading Plan.
Price represents the weighted average selling price. Prices range between $39.00 and $39.27.
These shares are held in a trust for the benefit of Reporting Person's child. Reporting Person is trustee of the trust.
Option is immediately exercisable, but the shares vest in a series of four (4) equal annual installments measured from the date exercisable.
Not applicable per instruction 4(c)(iii).