SEC FORM 4

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

FLUKE BRADLEY J

(Last)

(First)

(Middle)

4635 BOSTON LANE

(Street)

AUSTIN

78735

(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)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	Vice President

3. Date of Earliest Transaction (Month/Day/Year)
04/14/2005

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock, $0.0001 par value	04/14/2005		S		4,000⁽¹⁾	D	$27.81	59,237	D
Common Stock, $0.0001 par value								580	I	Bradley J. Fluke GRAT
Common Stock, $0.0001 par value	04/14/2005		S		315⁽¹⁾	D	$27.67	4,120	I	by B. Fluke Trust⁽²⁾

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Incentive Stock Option (right to buy)	$0.25							06/23/1998⁽³⁾	06/23/2008	Common Stock, $0.0001 par value	19,309		19,309⁽⁴⁾	D
Incentive Stock Option (right to buy)	$1.75							07/20/1999⁽³⁾	07/20/2009	Common Stock, $0.0001 par value	9,400		9,400⁽⁵⁾	D
Incentive Stock Option (right to buy)	$48.88							04/30/2002⁽⁶⁾	09/20/2010	Common Stock, $0.0001 par value	3,546		3,546⁽⁷⁾	D
Non-Qualified Stock Option (right to buy)	$15.44							03/16/2001⁽⁸⁾	03/16/2011	Common Stock, $0.0001 par value	12,875		12,875⁽⁹⁾	D
Non-Qualified Stock Option (right to buy)	$22.63							07/18/2001⁽¹⁰⁾	07/18/2011	Common Stock, $0.0001 par value	13,509		13,509⁽¹¹⁾	D
Non-Qualified Stock Option (right to buy)	$38.5							08/18/2004⁽¹²⁾	08/18/2013	Common Stock, $0.0001 par value	21,834		21,834⁽¹³⁾	D
Non-Qualified Stock Option (right to buy)	$15.1							04/30/2002⁽⁶⁾	09/21/2011	Common Stock, $0.0001 par value	15,666		15,666⁽¹⁴⁾	D
Non-Qualified Stock Option (right to buy)	$48.88							04/30/2002⁽⁶⁾	09/20/2010	Common Stock, $0.0001 par value	8,010		8,010⁽¹⁵⁾	D

Explanation of Responses:

1. Shares sold pursuant to reporting person's 10(b)5-1 plan.

2. Shares are held in a family trust over which reporting person exercises voting and dispositive control over securities of issuer held in such trust.

3. Option is immediately exercisable and vests in a series of thirty-six (36) equal monthly installments, beginning April 30, 2002.

4. On March 24, 2005 options to acquire 17,691 shares of common stock were transferred by the reporting person pursuant to a domestic relations order.

5. On March 24, 2005 options to acquire 8,600 shares of common stock were transferred by the reporting person pursuant to a domestic relations order.

6. This option becomes exercisable as it vests in a series of thirty-six (36) equal monthly installments beginning April 30, 2002.

7. On March 24, 2005 options to acquire 2,591 shares of common stock were transferred by the reporting person pursuant to a domestic relations order.

8. This option becomes exercisable as it vests in a series of sixty (60) successive equal monthly installments beginning March 16, 2001.

9. On March 24, 2005 options to acquire 7,125 shares of common stock were transferred by the reporting person pursuant to a domestic relations order.

10. This option becomes exercisable as it vests in a series of sixty (60) successive equal monthly installments beginning July 18, 2001.

11. On March 24, 2005 options to acquire 6,491 shares of common stock were transferred by the reporting person pursuant to a domestic relations order.

12. Option vests and becomes exercisable with respect to (i) twenty percent (20%) of the option shares upon optionee's completion of one year of service measured from the grant date 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 first year anniversary of the grant date.

13. On March 24, 2005 options to acquire 3,166 shares of common stock were transferred by the reporting person pursuant to a domestic relations order.

14. On March 24, 2005 options to acquire 14,334 shares of common stock were transferred by the reporting person pursuant to a domestic relations order.

15. On March 24, 2005 options to acquire 5,853 shares of common stock were transferred by the reporting person pursuant to a domestic relations order.

	Bradley J. Fluke	04/15/2005
	** 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).
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 Number.