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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
1197843	D Jonathan Ivester	400 W Cesar Chavez Austin TX 78701	Sr Vp Of Worldwide Operations	No	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
Common Stock, $0.0001 Par Value	Disposition	2010-09-12	416	$34.85	120,131	No	4	F	Direct
Common Stock, $0.0001 Par Value	Acquisiton	2010-09-14	2,995	$24.30	123,126	No	4	M	Direct
Common Stock, $0.0001 Par Value	Acquisiton	2010-09-14	1,305	$31.96	124,431	No	4	M	Direct
Common Stock, $0.0001 Par Value	Disposition	2010-09-14	4,300	$35.68	120,131	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	F	Direct
No	4	M	Direct
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	2010-09-14	2,995	$0.00	2,995	$24.30
Common Stock, $0.0001 Par Value	Non-Qualified Stock Option (right to buy)	Disposition	2010-09-14	1,305	$0.00	1,305	$31.96

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2005-06-13	2012-06-13	No	4	M	Direct
19,945	2009-02-15	2018-02-15	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock, $0.0001 Par Value	8,850	Indirect	E Ivester Heritage Trust
Common Stock, $0.0001 Par Value	8,850	Indirect	S. Ivester Heritage Trust
Common Stock, $0.0001 Par Value	8,850	Indirect	E. Ivester Heritage Trust
Common Stock, $0.0001 Par Value	8,850	Indirect	B. Ivester Heritage Trust

Footnotes

Shares sold pursuant to Reporting Person's 10b5-1 Trading Plan.
These shares are held in a trust for the benefit of Reporting Person's child.
These shares are held in a trust for the benefit of Reporting Person's child. Reporting Person is co-trustee of the trust.
Option becomes exercisable as it vests in a series of twelve (12) successive equal monthly installments measured from the date exercisable.
Not applicable per instruction 4(c)(iii).
Option vests and becomes exercisable with respect to (i) twenty-five percent (25%) of the option shares upon the date exercisable and (ii) the balance of the option shares in a series of thirty-six (36) successive monthly installments over the thirty-six (36) month period measured from the date exercisable.