4 2003-05-20 0 0000751652 QUESTAR CORP STR 0001178976 ROSE D N 0 0 0 1 Retired Executive Officer Common Stock and attached Common Stock Purchase Rights 2003-05-21 4 M 0 6000 22.95 A 37313 D Common Stock and attached Common Stock Purchase Rights 2003-05-20 4 S 0 4700 32.1 D 32613 D Common Stock and attached Common Stock Purchase Rights 2003-05-20 4 S 0 300 32.19 D 32313 D Common Stock and attached Common Stock Purchase Rights 2003-05-21 4 F 0 609 32.33 D 31704 D Stock Option 22.95 2003-05-21 4 M 0 6000 22.95 A 2003-05-01 2010-04-30 Common Stock and attached Common Stock Purchase Rights 6000 228079 D This total does not include 47,745.4493 shares held indirectly through trust for Employee Benefit Plan. This total does not include 15,124.6509 phantom stock units. Connie C. Holbrook, Attorney in Fact for D. N. Rose 2003-05-21