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 *
RATTIE KEITH O
   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)
Pres.& Chief Executive Officer
(Last)
(First)
(Middle)
180 EAST 100 SOUTH, P.O. BOX 45433		 3. Date of Earliest Transaction (Month/Day/Year)
06/30/2010
(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 06/30/2010   M   34,542 D $ 45.49 235,790 (1) D  
Common Stock               2,652.7168 (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
Restricted Stock Unit (3) 07/01/2010   A   65,704     (4)   (4) Common Stock 65,704 $ 15.22 65,704 D  
Phantom Stock Units $ 0               (5)   (5) Phantom Stock Units 48,074.9674   48,074.9674 D  
Stock Option $ 11.4 (6)               (7) 03/05/2016 Common Stock 150,000   150,000 D  
Stock Option $ 4.42 (6)             08/01/2001 02/01/2011 Common Stock 100,000   100,000 D  
Stock Option $ 4.515 (6)             08/13/2001 02/13/2011 Common Stock 200,000   200,000 D  
Stock Option $ 3.695 (6)             08/11/2002 02/11/2012 Common Stock 280,000   280,000 D  
Stock Option $ 4.37 (6)             08/11/2003 02/11/2013 Common Stock 300,000   300,000 D  
Stock Option $ 13.235 (6)             06/30/2010 02/13/2015 Common Stock 80,000   80,000 (8) D  
Stock Option $ 17.35 (6)             06/30/2010 02/12/2016 Common Stock 30,000   30,000 (8) D  
Stock Option $ 12.43 (6)             06/30/2010 10/24/2012 Common Stock 200,000   200,000 (8) D  
Stock Option $ 13.1 (6)             06/30/2010 03/05/2017 Common Stock 125,000   125,000 (8) D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
RATTIE KEITH O
180 EAST 100 SOUTH, P.O. BOX 45433
SALT LAKE CITY, UT 84145-0433		       Pres.& Chief Executive Officer  

Signatures

 Thomas C. Jepperson Attorney in Fact for K. O. Rattie   07/06/2010
**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) I received a distribution of formerly restricted shares of stock and made an advance election to satisfy my tax payment obligations by selling shares to Questar.
(2) As of July 1, 2010, I have 2,652.7168 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) Each restricted stock unit represents a contingent right to receive 1 share of unrestricted STR common stock.
(4) The restricted stock units vest in three equal annual installments beginning on July 1, 2011, subject to accelerated vesting upon the occurrence of certain events a set forth in the award agreement.
(5) Phantom stock units will be converted to cash per my elections on or within 5 years of my termination of employment (subject to 6-month delay if necessary to comply with IRC 409A), or upon my death or Disability.
(6) In connection with the spin-off, these options were split into options to acquire Questar common stock and QEP common stock in accordance with that certain Employee Matters Agreement dated June 14, 2010 between Questar and QEP.
(7) The option vests in three annual installments beginning on March 5, 2010.
(8) The options vested persuant to the separation agreement with the company dated 06/14/2010.

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