Silicon Laboratories Inc.
SILICON LABORATORIES INC (Form: 4, Received: 12/17/2009 16:50:36)
FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public
Utility Holding Company Act of 1935 or Section 30(f) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

WOOD WILLIAM P
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)
(Last)          (First)          (Middle)

300 WEST SIXTH ST STE 2300
3. Date of Earliest Transaction (MM/DD/YYYY)

12/15/2009
(Street)

AUSTIN, TX 78701
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
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. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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   12/15/2009     M    5000   A $31   10388   D    
Common Stock, $0.0001 par value   12/15/2009     S    5000   (1) D $45.25   5388   D    
Common Stock, $0.0001 par value                  155776   I   by Silverton Partners, LP   (2)

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 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 of Derivative Security: 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)   $31   12/15/2009     M         5000    3/23/2000   (3) 3/23/2010   Common Stock, $0.0001 par value   5000     (4) 5000   D    

Explanation of Responses:
( 1)  Shares sold pursuant to Reporting Person's 10b5-1 Trading Plan.
( 2)  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.
( 3)  Option is immediately exercisable, but the shares vest in four equal annual installments upon each anniversary of March 23, 2000.
( 4)  Not applicable per instruction 4(c)(iii).

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
WOOD WILLIAM P
300 WEST SIXTH ST STE 2300
AUSTIN, TX 78701
X



Signatures
Bruce A. Maurer for William P. Wood 12/17/2009
** 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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