X0202 4 2006-08-01 0 0000751652 QUESTAR CORP STR 0001178565 STANLEY CHARLES B 180 EAST 100 SOUTH, P.O. BOX 45433 SALT LAKE CITY UT 84145-0433 1 1 0 0 Executive Vice President Common Stock and attached Common Stock Purchase Rights 2006-08-01 4 M 0 3500 23.95 A 28500 D Common Stock and attached Common Stock Purchase Rights 2006-08-02 4 S 0 3500 90.00 D 25000 D Common Stock and attached Common Stock Purchase Rights 3102.3114 I Employee Investment Plan Stock Option 23.95 2006-08-01 4 M 0 3500 23.95 D 2002-07-31 2012-01-31 Common Stock and attached Common Stock Purchase Rights 3500 86000 D Phantom Stock Units 0.00 Phantom Stock Units 5831.3939 5831.3939 D Stock Option 22.95 2002-08-11 2012-02-11 Common Stock and attached Common Stock Purchase Rights 56000 56000 D Stock Option 27.11 2003-08-11 2013-02-11 Common Stock and attached Common Stock Purchase Rights 56250 56250 D Stock Option 77.14 2010-02-01 2012-10-24 Common Stock and attached Common Stock Purchase Rights 0 0 D This total does not include 23,561 shares held indirectly through family trusts for which I have voting and investment control. These shares were sold pursuant to a Rule 10b5-1 plan entered into on 5/4/2006 and that was disclosed by my Form 144 filed on 8/2/2006.These are the last shares sold on this plan. As of August 1, 2006, I have 3,102.3114 equivalent shares of stock in Questar's Employee Investment Plan. The number of equivalent shares will fluctuate as Questar's stock price changes; this fluctuation does not reflect any transactions that should be reported. Phantom stock units will be converted to cash beginning at retirement; my retirement date is unknown. Abigai L. Jones Attorney in Fact for C. B. Stanley 2006-08-02