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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	Explanation
Common Stock, $0.0001 Par Value	Acquisiton	2011-02-14	6,000	$32.11	116,577	No	4	M	Direct
Common Stock, $0.0001 Par Value	Disposition	2011-02-14	6,000	$45.91	110,577	No	4	S	Direct
Common Stock, $0.0001 Par Value	Acquisiton	2011-02-15	7,348	$0.00	117,925	No	4	A	Direct
Common Stock, $0.0001 Par Value	Disposition	2011-02-15	1,958	$45.73	115,967	No	4	F	Direct
Common Stock, $0.0001 Par Value	Disposition	2011-02-15	1,322	$45.73	114,645	No	4	F	Direct
Common Stock, $0.0001 Par Value	Disposition	2011-02-14	900	$45.91	6,150	No	4	S	Indirect	S. Ivester Heritage Trust
Common Stock, $0.0001 Par Value	Disposition	2011-02-14	900	$45.91	6,150	No	4	S	Indirect	E. Ivester Heritage Trust
Common Stock, $0.0001 Par Value	Disposition	2011-02-14	900	$45.91	6,150	No	4	S	Indirect	B. Ivester Heritage Trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct
No	4	A	Direct
No	4	F	Direct
No	4	F	Direct
No	4	S	Indirect	S. Ivester Heritage Trust
No	4	S	Indirect	E. Ivester Heritage Trust
No	4	S	Indirect	B. Ivester Heritage Trust

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	2011-02-14	6,000	$0.00	6,000	$32.11

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
17,205	2008-02-15	2017-02-15	No	4	M	Direct

Footnotes

Shares sold pursuant to Reporting Person's 10b5-1 Trading Plan.
Reflects the grant of restricted stock units (RSUs) that will entitle Reporting Person to receive one share of common stock per RSU. The RSUs will vest completely on the third (3rd) anniversary of the date of grant and will be settled pursuant to the terms of the Issuer's 2009 Stock Incentive Plan.
These shares are held in a trust for the benefit of Reporting Person's child. Reporting Person is co-trustee of the trust.
Option vests and becomes exercisable with respect to (i) twenty percent (20%) of the option shares upon the date exercisable and (ii) the balance of the option shares in a series of forty-eight (48) successive monthly installments over the forty-eight (48) month period measured from the date exercisable.
Not applicable per instruction 4(c)(iii).