SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
SOOCH NAVDEEP S

(Last) (First) (Middle)
400 W CESAR CHAVEZ

(Street)
AUSTIN TX 78701

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
SILICON LABORATORIES INC [ SLAB ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
05/17/2011
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock, $0.0001 par value 05/17/2011 M 62,334 A $15.1 681,791 D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Option (right to buy) $15.1 05/17/2011 M 20,834 12/21/2005(1) 09/21/2011 Common Stock, $0.0001 par value 20,834 (2) 0 D
Non-Qualified Stock Option (right to buy) $15.1 05/17/2011 M 16,500 09/21/2001(3) 09/21/2011 Common Stock, $0.0001 par value 16,500 (2) 0 D
Non-Qualified Stock Option (right to buy) $15.1 05/17/2011 M 25,000 10/21/2001(4) 09/21/2011 Common Stock, $0.0001 par value 25,000 (2) 0 D
Explanation of Responses:
1. Option becomes exercisable as it vests in a series of ten (10) successive equal monthly installments. The first installment will vest on the date exercisable.
2. Not applicable per instruction 4(c)(iii).
3. Option is one hundred percent (100%) vested and exercisable on the date of grant.
4. Option becomes exercisable as it vests in a series of sixty (60) successive equal monthly installments measured from the date of grant. The first installment will vest on the date exercisable.
Saie-Yau Hui for Navdeep S. Sooch 05/19/2011
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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