X0202 4 2004-12-27 0 0001038074 SILICON LABORATORIES INC SLAB 0001134855 SOOCH NAVDEEP S 4635 BOSTON LANE AUSTIN TX 78735 1 0 0 0 Common Stock, $0.0001 par value 2004-12-27 4 S 0 28016 35.0768 D 1505369 D Common Stock, $0.0001 par value 2004-12-27 4 S 0 1681 35.0768 D 89838 I By Libra II, L.P. Common Stock, $0.0001 par value 2004-12-27 4 S 0 560 35.0768 D 13112 I David T. Sooch Trust Common Stock, $0.0001 par value 2004-12-27 4 S 0 560 35.0768 D 13112 I Kelly A. Sooch Trust Common Stock, $0.0001 par value 2004-12-27 4 S 0 560 35.0768 D 13112 I Kevin S. Sooch Trust Non-Qualified Stock Option (right to buy) 15.1 2001-09-21 2011-09-21 Common Stock, $0.0001 par value 16500 16500 D Non-Qualified Stock Option (right to buy) 15.1 2001-10-21 2011-09-21 Common Stock, $0.0001 par value 125000 125000 D Non-Qualified Stock Option (right to buy) 24.3 2005-07-13 2012-06-13 Common Stock, $0.0001 par value 100000 100000 D Non-Qualified Stock Option (right to buy) 33.17 2005-08-10 2014-08-10 Common Stock, $0.0001 par value 1195 1195 D Non-Qualified Stock Option (right to buy) 38.5 2004-08-18 2013-08-18 Common Stock, $0.0001 par value 10000 10000 D Shares sold pursuant to reporting person's 10(b)5-1 plan. Price represents the weighted average selling price. Prices range between $35.00 and $35.25. These shares are held in a family limited partnership. These shares are held in a trust for the benefit of the reporting person's children. The reporting person is co-trustee of the trust. This option is 100% vested and exercisable on the date of grant. On December 13, 2004 options to acquire 16,500 shares of common stock were transferred by the reporting person pursuant to a domestic relations order. This option becomes exercisable as it vests in a series of sixty (60) successive equal monthly installments measured from the date of grant. On December 13, 2004 options to acquire 125,000 shares of common stock were transferred by the reporting person pursuant to a domestic relations order. The option becomes exercisable as it vests in a series of twelve (12) successive equal monthly installments measured from June 13, 2005. On December 13, 2004 options to acquire 100,000 shares of common stock were transferred by the reporting person pursuant to a domestic relations order. 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. On December 13, 2004 options to acquire 12,500 shares of common stock were transferred by the reporting person pursuant to a domestic relations order. On December 13, 2004 options to acquire 10,000 shares of common stock were transferred by the reporting person pursuant to a domestic relations order. Bruce A. Maurer, Power of Attorney for Navdeep S. Sooch 2004-12-28