X0202 4 2005-06-10 0 0000751652 QUESTAR CORP STR 0001174637 HOLBROOK CONNIE C 180 EAST 100 SOUTH SALT LAKE CITY UT 84111 0 0 0 1 Retired Senior Vice President Common Stock and attached Common Stock Purchase Rights 2005-06-10 4 M 0 4948 22.95 A 189419 D Common Stock and attached Common Stock Purchase Rights 2005-06-10 4 F 0 3138 64 D 185697 D Common Stock and attached Common Stock Purchase Rights 22.95 2005-06-10 4 M 0 4948 22.95 D 2002-08-11 2012-02-11 Common Stock and attached Common Stock Purchase Rights 4948 105382 D Phantom Stock Units 64.28 2005-06-13 4 A 0 17.0892 64.28 A Phantom Stock Units 17.0892 8491.4229 D I exercised an option to purchase 4,948 shares of stock using 1,774 shares as consideration. I satisfied my tax withholding obligation by selling 1,364 shares to Questar. This total also reflects a gift of 554 shares made on June 6, 2005 at a price of $64.10 as well as a gift of 30 shares made on June 13, 2005 at a price of $64.28 Phantom stock units will be converted to cash beginning one year after my retirement. I retired effective April 30, 2005. During my employment, I also received phantom stock units as a result of my participation in an excess benefit plan. This total includes 3,592.1336 units in such plan in addition to units held through my account balance in a deferred compensation plan. I receive dividends on those units. Abigail L. Jones Attorney in Fact for C. C. Holbrook 2005-06-14