Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
ALLRED ALAN K
   2. Issuer Name and Ticker or Trading Symbol
QUESTAR CORP [STR] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Executive Officer
(Last)
(First)
(Middle)
180 EAST 100 SOUTH, P.O. BOX 45433		 3. Date of Earliest Transaction (Month/Day/Year)
04/26/2006
(Street)

SALT LAKE CITY, UT 84145-0433		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock and attached Common Stock Purchase Rights 04/26/2006   M   12,521 A $ 28.01 41,947 D  
Common Stock and attached Common Stock Purchase Rights 04/27/2006   S   12,521 (1) D $ 78 29,426 D  
Common Stock and attached Common Stock Purchase Rights               22,257.4132 (2) I Employee Investment Plan

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option $ 28.01 04/26/2006   M     12,521 08/13/2001 02/13/2011 Common Stock and attached Common Stock Purchase Rights 12,521 $ 28.01 5,479 D  
Phantom Stock Units $ 0               (3)   (3) Phantom Stock Units 1,295.7388   1,295.7388 D  
Stock Option $ 19.125             08/11/1997 02/11/2007 Common Stock and attached Common Stock Purchase Rights 6,837   6,837 D  
Stock Option $ 21.375             08/10/1998 02/10/2008 Common Stock and attached Common Stock Purchase Rights 6,511   6,511 D  
Stock Option $ 17             08/09/1999 02/09/2009 Common Stock and attached Common Stock Purchase Rights 5,398   5,398 D  
Stock Option $ 15             08/08/2000 02/08/2010 Common Stock and attached Common Stock Purchase Rights 9,050   9,050 D  
Stock Option $ 22.95             08/11/2002 02/11/2012 Common Stock and attached Common Stock Purchase Rights 22,000   22,000 D  
Stock Option $ 27.11             08/11/2003 02/11/2013 Common Stock and attached Common Stock Purchase Rights 52,500   52,500 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
ALLRED ALAN K
180 EAST 100 SOUTH, P.O. BOX 45433
SALT LAKE CITY, UT 84145-0433		       Executive Officer  

Signatures

 Abigail L. Jones Attorney in Fact for A. K. Allred   04/27/2006
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) These shares were sold pursuant to a Rule 10b5-1 plan entered into on 3/3/2006 and that was disclosed by my Form 144 filed on 4/21/2006.
(2) As of April 26, 2006, I have 22,257.4132 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.
(3) Phantom stock units will be converted to cash beginning at retirement; my retirement date is unknown.

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