X0202 4 2005-12-09 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 2005-12-09 4 S 0 15640 39.3 D 1191069 D Common Stock, $0.0001 par value 2005-12-09 4 S 0 1877 39.3 D 64954 I By Libra II, L.P. Common Stock, $0.0001 par value 2005-12-09 4 S 0 626 39.3 D 4819 I David T. Sooch Trust Common Stock, $0.0001 par value 2005-12-09 4 S 0 626 39.3 D 4819 I Kelly A. Sooch Trust Common Stock, $0.0001 par value 2005-12-09 4 S 0 626 39.3 D 4819 I Kevin S. Sooch Trust Shares sold pursuant to reporting person's 10(b)5-1 plan. 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. Bruce A. Maurer, Power of Attorney for Navdeep S. Sooch 2005-12-13