X0306 4 2018-03-01 0001110803 ILLUMINA INC ILMN 0001008891 BOWMAN A BLAINE 5200 ILLUMINA WAY SAN DIEGO CA 92122 1 Common Stock 2018-03-01 4 M 0 3000 44.51 A 19868 D Common Stock 2018-03-01 4 S 0 456 224.279 D 19412 D Common Stock 2018-03-01 4 S 0 300 225.437 D 19112 D Common Stock 2018-03-01 4 S 0 500 226.82 D 18612 D Common Stock 2018-03-01 4 S 0 1244 227.802 D 17368 D Common Stock 2018-03-01 4 S 0 500 228.66 D 16868 D Common Stock 670 I By Partnership Common Stock 198 I By Trust Non-qualified Stock Option (Right to Buy) 44.51 2018-03-01 4 M 0 3000 0 D 2013-04-18 2022-04-18 Common Stock 3000 4800 D The sale was made pursuant to a 10b5-1 plan. Weighted average sale price representing 456 shares sold ranging from $224.01 to $224.48 per share. Number of shares sold at each separate price will be made available to the SEC staff, the issuer, or a security holder of the issuer upon request. Weighted average sale price representing 300 shares sold ranging from $225.09 to $226.00 per share. Number of shares sold at each separate price will be made available to the SEC staff, the issuer, or a security holder of the issuer upon request. Weighted average sale price representing 500 shares sold ranging from $226.23 to $227.16 per share. Number of shares sold at each separate price will be made available to the SEC staff, the issuer, or a security holder of the issuer upon request. Weighted average sale price representing 1,244 shares sold ranging from $227.44 to $228.41 per share. Number of shares sold at each separate price will be made available to the SEC staff, the issuer, or a security holder of the issuer upon request. Weighted average sale price representing 500 shares sold ranging from $228.50 to $228.85 per share. Number of shares sold at each separate price will be made available to the SEC staff, the issuer, or a security holder of the issuer upon request. By: Scott M. Davies for A. Blaine Bowman 2018-03-05