X0201 4 2003-09-29 0 0001038074 SILICON LABORATORIES INC SLAB 0001197847 ARTUSI DANIEL A 4635 BOSTON LANE AUSTIN, TX X1 78735 UNITED STATES 0 1 0 0 President & COO Common Stock, $0.0001 par value 2003-09-29 4 M 0 308 20.24 A 108051 D Common Stock, $0.0001 par value 2003-09-29 4 S 0 308 48.9 D 107743 D Common Stock, $0.0001 par value 2003-09-29 4 M 0 6358 20.24 A 114101 D Common Stock, $0.0001 par value 2003-09-29 4 S 0 6358 48.9288 D 107743 D Incentive Stock Option (right to buy) 20.24 2003-09-29 4 M 0 308 0 D 2002-08-27 2011-08-27 Common Stock 308 10792 D Non-Qualified Stock Option (right to buy) 20.24 2003-09-29 4 M 0 6358 0 D 2002-08-27 2011-08-27 Common Stock 6358 222542 D Option first became exercisable on August 27, 2002. Option vests and becomes exercisable over a 60-month period with respect to (i) twenty percent (20%) of the option shares vest and become exercisable upon optionee's completion of one year of service measured from August 27, 2001 and (ii) the balance of the option shares vest and become exercisable in a series of forty-eight (48) successive equal monthly installments over the forty-eight (48) month period measured from the first year anniversary of August 27, 2001. Not applicable per instruction 4(c)(iii). Daniel A. Artusi 2003-09-30