Sec Form 4 Filing - Tolany Brandon @ SILICON LABORATORIES INC - 2017-05-01

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 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

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1. Name and Address of Reporting Person Tolany Brandon 2. Issuer Name and Ticker or Trading Symbol SILICON LABORATORIES INC [ SLAB] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) SR VP of Worldwide Sales (Last) (First) (Middle) 400 WEST CESAR CHAVEZ STREET 3. Date of Earliest Transaction (MM/DD/YY) 05/01/2017 (Street) AUSTIN, TX78701 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 05/01/2017 M 9,118 A $ 43.82 62,627 ( 1 ) D Common Stock, $0.0001 par value 05/01/2017 S 9,118 D $ 72.07 ( 2 ) 53,509 D Common Stock, $0.0001 par value 05/02/2017 M 9,117 A $ 43.82 62,626 D Common Stock, $0.0001 par value 05/02/2017 S 9,117 D $ 70.98 ( 3 ) 53,509 D Common Stock, $0.0001 par value 05/02/2017 S 8,591 D $ 70.84 44,918 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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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) $ 43.82 05/01/2017 M 9,118 01/28/2017 01/28/2026 Common Stock, $0.0001 par value 9,118 ( 4 ) 63,822 D Non-Qualified Stock Option (right to buy) $ 43.82 05/02/2017 M 9,117 01/28/2017 01/28/2026 Common Stock, $0.0001 par value 9,117 ( 4 ) 54,705 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Tolany Brandon 400 WEST CESAR CHAVEZ STREET AUSTIN, TX78701 SR VP of Worldwide Sales Signatures Saie-Yau Hui for Brandon Tolany 05/03/2017 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Includes 200 shares purchased by Reporting Person through the Issuer's 2009 Employee Stock Purchase Plan on the most recent semi-annual purchase date. ( 2 )Price represents the weighted average selling price. Prices range between $72.00 and $72.30 ( 3 )Price represents the weighted average selling price. Prices range between $70.60 and $71.30 ( 4 )Not applicable per instruction 4(c)(iii).

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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