Silicon Laboratories Inc.
SILICON LABORATORIES INC (Form: 3, Received: 05/16/2011 17:40:55)
FORM 3
        
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

OMB APPROVAL
OMB Number: 3235-0104
Expires: February 28, 2011
Estimated average burden
hours per response...
0.5
                      
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(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Tuttle George Tyson

2. Date of Event Requiring Statement (MM/DD/YYYY)
5/12/2011 

3. Issuer Name and Ticker or Trading Symbol

SILICON LABORATORIES INC [SLAB]

(Last)        (First)        (Middle)

400 WEST CESAR CHAVEZ

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                            _____ 10% Owner
___ X ___ Officer (give title below)          _____ Other (specify below)
COO /

(Street)

AUSTIN, TX 78701       

(City)              (State)              (Zip)
5. 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 Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock, $0.0001 par value   60347   (1) D    

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(MM/DD/YYYY)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Option (right to buy)   2/15/2008   (2) 2/15/2017   Common Stock, $0.0001 par value   13000   $32.11   D    
Non-Qualified Stock Option (right to buy)   2/15/2009   (3) 2/15/2018   Common Stock, $0.0001 par value   11511   $31.96   D    

Explanation of Responses:
( 1)  Includes 43,795 restricted stock units (RSUs) that will entitle Reporting Person to receive one share of common stock per RSU. 13,911 RSUs will vest on February 15, 2012 and will be settled pursuant to the terms of the Issuer's 2000 Stock Incentive Plan. 7,169 RSUs will vest on February 15, 2012, 14,339 RSUs will vest on February 15, 2013, and 8,376 RSUs will vest on February 15, 2014 and will be settled pursuant to the terms of the Issuer's 2009 Stock Incentive Plan.
( 2)  Originally granted 30,000 option shares. Option vests and becomes exercisable with respect to (i) twenty percent (20%) of the total granted option shares on the date exercisable and (ii) the balance of the total granted option shares in a series of forty-eight (48) successive monthly installments over the forty-eight (48) month period measured from the date exercisable.
( 3)  Originally granted 21,250 option shares. Option vests and becomes exercisable with respect to (i) twenty-five percent (25%) of the total granted option shares on the date exercisable and (ii) the balance of the total granted option shares in a series of thirty-six (36) successive monthly installments over the thirty-six (36) month period measured from the date exercisable.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Tuttle George Tyson
400 WEST CESAR CHAVEZ
AUSTIN, TX 78701


COO

Signatures
George Tyson Tuttle 5/16/2011
** 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 5(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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.