Questar Net Income Up 45% In Third Quarter 2006; Company Raises 2006 Earnings Guidance,
Provides Initial 2007 Outlook
(Oct. 26, 2006)

Questar Shuts In Some Rockies Natural Gas Production, Raises Full-Year Production Guidance
(Oct. 3, 2006)

Questar Net Income Up 49% In Second-Quarter 2006; Company Updates Estimates of Probable, Possible Reserves
(July 26, 2006)

Questar Market Resources Prices Senior Notes Offering
(May 11, 2006)

Questar Net Income Grows 44% In First-Quarter 2006; Company Raises 2006 EPS and Production Guidance
(April 26, 2006)

Questar Net Income Grows 42% In 2005; Company Adjusts 2006 Earnings Guidance To Reflect Lower Price Expectations
(Feb. 14, 2006)