|                                                        |
|--------------------------------------------------------|
|                                                        |  |  |  |
| (Exact name of registrant as specified in its charter) | Commission file number | State or other jurisdiction of incorporation or organization | (I.R.S. EmployerIdentification No.) |
| Questar Corporation                                    | 001-08796 | Utah | 87-0407509 |
| Questar Gas Company                                    | 333-69210 | Utah | 87-0155877 |
| Questar Pipeline Company                               | 000-14147 | Utah | 87-0307414 |

|                          |
|--------------------------|
|                          |  |
| Questar Corporation      | Common stock without par value, listed on the New York Stock Exchange |
| Questar Gas Company      | None |
| Questar Pipeline Company | None |

|                          |
|--------------------------|
|                          |  |
| Questar Corporation      | None |
| Questar Gas Company      | None |
| Questar Pipeline Company | None |

|                          |
|--------------------------|
|                          |  |
| Questar Corporation      | Yes [X]   No [   ] |
| Questar Gas Company      | Yes [   ]   No [X] |
| Questar Pipeline Company | Yes [   ]   No [X] |

----

|                          |
|--------------------------|
|                          |  |
| Questar Corporation      | Yes [X]   No [   ] |
| Questar Gas Company      | Yes [X]   No [   ] |
| Questar Pipeline Company | Yes [X]   No [   ] |

|                          |
|--------------------------|
|                          |  |
| Questar Corporation      | Yes [X]   No [   ] |
| Questar Gas Company      | Yes [X]   No [   ] |
| Questar Pipeline Company | Yes [X]   No [   ] |

|                          |
|--------------------------|
|                          |  |
| Questar Corporation      | [   ] |
| Questar Gas Company      | [   ] |
| Questar Pipeline Company | [   ] |

|                          |
|--------------------------|
|                          |  |  |  |  |
| Questar Corporation      | Large accelerated filer[X] | Accelerated filer[   ] | Non-accelerated filer[   ] | Smaller reporting company [   ] |
| Questar Gas Company      | Large accelerated filer[   ] | Accelerated filer[   ] | Non-accelerated filer[X] | Smaller reporting company [   ] |
| Questar Pipeline Company | Large accelerated filer[   ] | Accelerated filer[   ] | Non-accelerated filer[X] | Smaller reporting company [   ] |

|                          |
|--------------------------|
|                          |  |
| Questar Corporation      | Yes [   ]   No [X] |
| Questar Gas Company      | Yes [   ]   No [X] |
| Questar Pipeline Company | Yes [   ]   No [X] |

|                          |
|--------------------------|
|                          |  |
| Questar Corporation      | $3.6 billion |
| Questar Gas Company      | None |
| Questar Pipeline Company | None |

|                          |
|--------------------------|
|                          |  |  |
| Questar Corporation      | without par value | 175,008,184 |
| Questar Gas Company      | $2.50 per share par value | 9,189,626 |
| Questar Pipeline Company | $1.00 per share par value | 6,550,843 |

----

----

|                   |
|-------------------|
|                   |  |  |
| TABLE OF CONTENTS |   |
|              | Page |
|              |   |   |
| PART III          |
|              |   |   |
| Item 10.          | DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE. | 5 |
|              |   |   |
| Item 11.          | EXECUTIVE COMPENSATION. | 13 |
|              |   |   |
| Item 12.          | SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS. | 39 |
|              |   |   |
| Item 13.          | CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE. | 41 |
|              |   |   |
| Item 14.          | PRINCIPAL ACCOUNTING FEES AND SERVICES. | 42 |
|              |   |   |
| PART IV           |
|              |   |   |
| Item 15.          | EXHIBITS, FINANCIAL STATEMENT SCHEDULES. | 43 |
|              |   |   |
|              | SIGNATURES | 43 |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 4 |   |

----

|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |  |
| Teresa Beck age 61                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               | Director since 1999Finance and Audit CommitteeGovernance and Nominating Committee |
| Ms. Beck served as President of American Stores Co., a supermarket and drugstore holding company, from 1998 to 1999, and as American Stores' Chief Financial Officer from 1993 to 1998. Prior to joining American Stores, Ms. Beck served as an audit manager for Ernst & Young LLP.                                                                                                                                                                                                                                                                                                                                                                                         |
| Outside boards: Ms. Beck has served as a director of Albertsons Inc., Amylin Pharmaceuticals, Inc., ICOS Corporation, and Lexmark International, Inc.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| Director qualifications, attributes, skills and experience: Ms. Beck brings to the Board significant executive, financial and public company director experience. Ms. Beck has chaired audit committees for two other public companies and chaired the nominations committee for another public company. Ms. Beck also brings a broad background in environmental, health and educational areas.                                                                                                                                                                                                                                                                            |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Laurence M. Downes age 58                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | Director since 2010Finance and Audit Committee (Chair)Management Performance Committee |
| Mr. Downes has been with New Jersey Resources Corporation, a retail and wholesale energy company, since 1985.  He has served as New Jersey Resources' President and Chief Executive Officer since 1995 and its Chairman of the Board since 1996.                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| Outside boards: In addition to serving as Chairman of New Jersey Resources, Mr. Downes is a director and past chairman of the American Gas Association; trustee of the Natural Gas Council; and member of the Board of the New Jersey Economic Development Authority, as well as a trustee of the American Gas Foundation.                                                                                                                                                                                                                                                                                                                                                       |
| Director qualifications, attributes, skills and experience: Mr. Downes brings to the Board significant executive leadership and public company director experience. From his years as an executive and director of New Jersey Resources, Mr. Downes has extensive knowledge in the areas of business strategy, safety, risk oversight, management and corporate governance. He also has significant financial expertise as well as a wealth of experience and knowledge in the energy industry, particularly the natural gas utility business. Mr. Downes' board positions at natural gas trade organizations have positioned him to bring industry knowledge to our Board. |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 5 |   |

----

|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |  |
| Christopher Helmsage 61                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | Director since 2013Finance and Audit CommitteeManagement Performance Committee (Chair) |
| Mr. Helms is the President and Chief Executive Officer of US Shale Energy Advisors LLC,  and its direct and indirect subsidiaries including US Shale Energy Midstream, LLC, RMCO Holdings LLC and Rocky Mountain Crude Oil LLC.  Rocky Mountain Crude Oil is a crude oil logistics company serving various Rocky Mountain markets.  Mr. Helms previously served as Executive Vice President and Group Chief Executive Officer of NiSource Inc., and Chief Executive Officer and Executive Director of NiSource Gas Transmission and Storage. Prior to NiSource, Mr. Helms was the President and Chief Executive Officer of CMS Panhandle Companies, wholly-owned by CMS Energy Corporation (1999-2003); and from 1990 to 1999, held various positions of increasing responsibility with Duke Energy Corporation. |
| Outside boards: Mr. Helms serves as a director of Range Resources Corporation and MPLX GP LLC, a midstream crude oil and products pipeline limited partnership formed by Marathon Petroleum Corporation. He has previously served on the boards of the Millennium Pipeline Company LLC and Centennial Pipeline Company LLC. He also has served as a director of the Marcellus Shale Coalition; Vice Chair of the Interstate Natural Gas Association of America; and Chair of the Southern Gas Association.                                                                                                                                                                                                                                                                                                       |
| Director qualifications, attributes, skills and experience: Mr. Helms brings to the Board strong executive leadership and strategic management skills. He has more than 38 years of experience in the industry, with extensive involvement in the midstream energy business including operations, joint ventures, mergers and acquisitions, which enables him to provide insight on issues impacting the Company's business. He also has experience and skills in the areas of law, corporate governance, finance, accounting, compliance, and strategic planning and risk oversight.                                                                                                                                                                                                                            |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Ronald W. Jibsonage 62                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | Director since 2010Chairman since 2012 |
| Mr. Jibson has served as the Company’s President and Chief Executive Officer and a director since June 2010. He was appointed Chairman of the Board effective July 1, 2012.  Mr. Jibson is also Chairman, President and CEO of Wexpro, and Chairman and CEO of Questar Gas and Questar Pipeline.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| Outside boards: Mr. Jibson serves as a director of IdaCorp, Inc. and its subsidiary Idaho Power, and National Fuel Gas Company. He is past chair of the Board of Directors of the American Gas Association and past chair of Western Energy Institute. He also serves on the Board of Gas Technology Institute, is Chair of Utah State University's Board of Trustees and past Chair of the Salt Lake Chamber Board of Governors and the Economic Development Corporation of Utah.                                                                                                                                                                                                                                                                                                                     |
| Director qualifications, attributes, skills and experience: Mr. Jibson brings to the Board 35 years of service at Questar, during which time he has gained extensive leadership and natural gas industry experience. As both Chairman of the Board and Questar's President and CEO, Mr. Jibson provides strong leadership and communicates to the Board on Questar's strategic business plans, operations, performance, regulatory issues and any other developments. With his participation in industry organizations, he brings a broad knowledge of the natural gas industry as well as current industry trends and developments.                                                                                                                                                                             |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| James T. McManus, IIage 57                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       | Director since 2014Finance and Audit CommitteeNominating and Governance Committee |
| Mr. McManus is Chairman, President and Chief Executive Officer of Energen Corporation, an oil and gas exploration and production (E&P) company. He has been employed by Energen and its subsidiaries in various capacities since 1986. He was elected CEO in July 2007 and Chairman in January 2008. In 1997 he became President of Energen Resources and, over the next decade, led the growth of the E&P company from a small niche player in coalbed methane development in Alabama to one of the top independent oil and gas producers in the United States. Prior to joining Energen, Mr. McManus worked for Price Waterhouse Coopers.                                                                                                                                                              |
| Outside boards: Mr. McManus serves on the board of the Independent Producers Association of America (IPAA), U.S. Oil and Gas Association, and American Exploration Production Council (AXPC). He is past director of the National Petroleum Council (NPC), American Gas Association (AGA), and Gas Technology Institute (GTI).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| Director qualifications, attributes, skills and experience. In addition to his extensive knowledge and experience in oil and gas development, Mr. McManus has broad business experience in the fields of leadership, management, utility distribution, regulatory affairs, corporate governance and public relations.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 6 |   |

----

|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |  |
| Rebecca Ranichage 58                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       | Director since 2013Governance and Nominating Committee (Chair)Management Performance Committee |
| Ms. Ranich is a former director of Deloitte Consulting LLP, where she led the firm's Federal Government Energy Advisory and Sustainability practice which focused on sustainable business practices, working with the federal government and industry clients advising on mitigating and managing risks related to energy supply/demand and climate-change issues. After leaving Deloitte in 2013, she became an investor in and advisor to emerging technology companies.  Prior to joining Deloitte, Ms. Ranich was responsible for a number of major oil and gas pipeline projects, including working at PSG International to develop/lead negotiations and implement the TransCaspian Gas pipeline; and as an executive with Michael Baker Corporation, a large U.S. engineering firm providing services for transportation, energy and infrastructure investments, with responsibility for Europe and former Soviet Union operations. |
| Outside boards: Ms. Ranich is currently Vice Chair of the Board of Directors for the Gas Technology Institute, and serves as Chair of the Investment Committee. Ms. Ranich serves as a member of the Supervisory Board of Uniper, is on the Advisory Board of Yet Analytics, Inc. and is a member of the National Petroleum Council.  She also serves on the Commercialization Advisory Board for the Applied Physics Laboratory of Johns Hopkins University.                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| Director qualifications, attributes, skills and experience: With her strong background and wealth of experience in energy development and risk management at the executive and operational levels, Ms. Ranich is well positioned to make significant Board contributions. Her addition brings greater diversity to the Board with her work on sustainable environmental practices and strong global industry experience. Ms. Ranich also brings to the Board her successful track record of establishing, building and leading businesses.                                                                                                                                                                                                                                                                                                                                                                                            |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |   |
| Harris H. Simmonsage 61                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | Director since 1992Finance and Audit CommitteeGovernance and Nominating Committee Lead Director since May 2013 |
| Mr. Simmons has served as President and Chief Executive Officer of Zions Bancorporation(Zions), a bank holding company, since 1990 and as Chairman of Zions’ Board since 2002. He has served in a variety of positions at Zions and Zions First National Bank for more than 33 years, including Chief Financial Officer for Zions for five years. Zions is a financial services company that operates about 450 full-service banking offices in 11 states.                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| Outside boards: Mr. Simmons serves as a director and member of the audit committee of O. C. Tanner Company and a director and member of the audit and compensation committees of National Life Group. He is past chair of the American Bankers Association and a member of the Financial Services Roundtable.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| Director qualifications, attributes, skills and experience: Mr. Simmons brings extensive financial, executive management and public company director experience, as well as intimate knowledge of the community, public and political environment in which the Company operates its utility business. His local knowledge helps the Board understand the perspective of the Company's utility customers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |   |
| Bruce A. Williamsonage 56                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | Director since 2006Finance and Audit CommitteeManagement Performance Committee |
| Mr. Williamson is the former President, Chief Executive Officer and director of Cleco Corporation, an energy services company. His position with Cleco ended upon the merger of Cleco with Cleco Partners L.P. and Cleco Merger Sub, Inc. in April, 2016. Prior to joining Cleco in 2011, Mr. Williamson served as Dynegy Inc.'s President and Chief Executive Officer and a director from 2002 to 2011 and as Chairman of Dynegy's Board of Directors from 2004 to 2011. Mr. Williamson served as Senior Vice President Finance & Corporate Development at PanEnergy Corporation and led the negotiations of the merger with Duke Energy where he became President and Chief Executive Officer of Duke Energy Global Markets. He began his career with Shell Oil Company where he advanced to Treasurer.                                                                                                                              |
| Outside boards: Mr. Williamson is currently a director of Southcross Energy. He was formerly a director of Cleco and Dynegy Inc.  Mr. Williamson also is on the Dean's Board of the University of Houston.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| Director qualifications, attributes, skills and experience: Mr. Williamson brings extensive experience in executive management as well as an over 31-year career in virtually all facets of the energy industry, including exploration, production, midstream and downstream pipelines and electric power.  He also has significant experience in finance, mergers and acquisitions and restructuring transactions.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 7 |   |

----

|         |                                                   |
|---------|---------------------------------------------------|
| • | Annual election of all directors by majority vote |

|         |                                                      |
|---------|------------------------------------------------------|
| • | Seven of the eight director nominees are independent |

|         |                           |
|---------|---------------------------|
| • | Independent lead director |

|         |                                                           |
|---------|-----------------------------------------------------------|
| • | Independent audit, compensation and governance committees |

|         |                                                     |
|---------|-----------------------------------------------------|
| • | Regular executive sessions of independent directors |

|         |                                                        |
|---------|--------------------------------------------------------|
| • | All directors attended at least 75 percent of meetings |

|         |                                             |
|---------|---------------------------------------------|
| • | Annual board and committee self-evaluations |

|         |                                                                   |
|---------|-------------------------------------------------------------------|
| • | Presides over the executive sessions of the independent directors |

|         |                                                                                                                                                                                                             |
|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Collaborates with the Chairman and CEO and Corporate Secretary on setting the annual calendar for all regular Board and committee meetings, as well as setting agendas for all Board and committee meetings |

|         |                                                     |
|---------|-----------------------------------------------------|
| • | Maintains close contact with Board committee chairs |

|         |                                                             |
|---------|-------------------------------------------------------------|
| • | Facilitates communication between the directors and the CEO |

|         |                                                                   |
|---------|-------------------------------------------------------------------|
| • | Communicates the results of the Board's CEO evaluation to the CEO |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 8 |   |

----

|                              |
|------------------------------|
|                              |  |  |  |
| Director                     | Finance and Audit | ManagementPerformance | Governance andNominating |
| Teresa Beck                  | X |   | X |
| Laurence M. Downes           | Chair | X |   |
| Christopher A. Helms         | X | Chair |   |
| Ronald W. Jibson             |   |   |   |
| James T. McManus, II         | X |   | X |
| Rebecca Ranich               |   | X | Chair |
| Harris H. Simmons            | X |   | X |
| Bruce A. Williamson          | X | X |   |
|                         |   |   |   |
| Number of committee meetings | 5 | 5 | 3 |

|         |                                                                                                                                                                                                                                      |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Reviewing the recommended base salaries as well as the annual and long-term incentive award opportunities for our President and CEO and other officers, considering the competitiveness of each officer's total compensation package |

|         |                                                                                         |
|---------|-----------------------------------------------------------------------------------------|
| • | Reviewing and selecting the Company's peer group for compensation benchmarking purposes |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 9 |   |

----

|         |                                                                                                                                                                     |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Reviewing the recommended financial and operating goals and objectives for the short and long-term incentive programs, and verifying the achievement of these goals |

|         |                                                                       |
|---------|-----------------------------------------------------------------------|
| • | Administering our equity-based and other executive compensation plans |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 10 |   |

----

|                                                                                                 |
|-------------------------------------------------------------------------------------------------|
|                                                                                                 |  |  |
| Description                                                                                     | Fees ($) |
| Annual board member retainer                                                                    | 70,000 |
| Additional lead director retainer                                                               | 15,000 |
| Additional retainer for chair, Finance and Audit Committee and Management Performance Committee | 15,000 |
| Additional retainer for chair, Governance and Nominating Committee                              | 10,000 |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 11 |   |

----

|                      |
|----------------------|
|                      |  |  |  |  |  |  |
| Name1                | Fees Earned orPaid in Cash($) |  | StockAwards2     ($) |  | Total($) |  |
| Teresa Beck          | 76,099 |  | 100,008 |  | 176,107 |  |
| R. D. Cash3          | 17,500 |  | 100,008 |  | 117,508 |  |
| Laurence M. Downes   | 82,968 |  | 100,008 |  | 182,976 |  |
| Christopher A. Helms | 78,901 |  | 100,008 |  | 178,909 |  |
| James T. McManus II  | 70,000 |  | 100,008 |  | 170,008 |  |
| Rebecca Ranich       | 75,934 |  | 100,008 |  | 175,942 |  |
| Harris H. Simmons    | 85,000 |  | 100,008 |  | 185,008 |  |
| Bruce A. Williamson  | 76,099 |  | 100,008 |  | 176,107 |  |

|        |
|--------|
|        |
|   |

|         |                                                                                                                                                                                                                                                                                                                                                        |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1  | Excludes Ronald W. Jibson, who is an executive officer of the Company and did not receive additional compensation for his service as a director for the year 2015.  Mr. Jibson's compensation is reflected in the Summary Compensation Table in the section entitled, "Compensation Tables" in the Compensation Discussion and Analysis section below. |

|         |                                                                                                                                                                                                                                                                           |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 2  | On February 18, 2015, each director received a grant of 4,097 RSUs with a grant date value of $100,008. The awards vested on March 5, 2016. Directors held the following aggregate stock awards (or phantom shares and dividend equivalents) as of December 31, 2015: |

|                      |
|----------------------|
|                      |  |  |  |  |  |
| Name                 |  Vested Options(#) | Unvested RSUs/Deferred RSUs(#) |  | Vested Phantom Shares*(#) |  |
| Teresa Beck          |  | 4,097 |  | 134,151 |  |
| R. D. Cash           |  | 3,063 |  | 18,704 |  |
| Laurence M. Downes   |  | 4,097 |  | 25,568 |  |
| Christopher A. Helms |   | 4,097 |  |  |  |
| James T. McManus II  |   | 4,097 |  |  |  |
| Rebecca Ranich       |   | 4,097 |  | 3,756 |  |
| Harris H. Simmons    |  | 4,097 |  | 321,914 |  |
| Bruce A. Williamson  |  | 4,097 |  | 113,982 |  |

|        |
|--------|
|        |
|   |

|         |                                                                                                                                                                                                                                                                                       |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 3  | Mr. Cash retired as a Company director on May 27, 2015.  His cash fees reflect a pro-rated share.  His unvested Deferred RSUs vested in full as of his retirement date and a portion of these were distributed in 2015.  The remainder will be distributed according to his election. |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 12 |   |

----

|                      |
|----------------------|
|                      |  |
| Name                 | Title |
| Ronald W. Jibson     | Chairman, President and Chief Executive Officer |
| Kevin W. Hadlock     | Executive Vice President and Chief Financial Officer |
| Thomas C. Jepperson1 | Chief Operating Officer |
| Craig C. Wagstaff    | Executive Vice President and President, Questar Gas |
| Micheal G. Dunn      | Executive Vice President, and President, Questar Pipeline |
| James R. Livsey2     | Former Executive Vice President, Chief Operating Officer, Wexpro |
| R. Allan Bradley2    | Former Executive Vice President, President and Chief Executive Officer, Questar Pipeline |

|        |
|--------|
|        |
|   |

|         |                                                                                                                                                                                                                                                      |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Questar Gas Company ("Questar Gas") provides retail natural gas distribution to residential, industrial and commercial customers in Utah, southwestern Wyoming and southeastern Idaho, at gas rates historically among the lowest in the nation. |

|         |                                                                                                                                                                                                                                                                                                                 |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Wexpro Company ("Wexpro"), develops and produces most of its natural gas from reserves contractually dedicated to Questar Gas under a 1981 agreement, known as the "Wexpro Agreement." Wexpro produces and delivers the natural gas to Questar Gas at its cost of service, which includes a competitive return. |

|         |                                                                                                                                                                                                               |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Questar Pipeline Company ("Questar Pipeline") provides FERC-regulated interstate natural gas transportation, underground storage services, and other energy services primarily in Utah, Wyoming and Colorado. |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 13 |   |

----

|         |                                                                               |
|---------|-------------------------------------------------------------------------------|
| • | Questar Gas invested $66.5 million in its infrastructure-replacement program. |

|         |                                                                                                                                                                                                                                  |
|---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Questar Gas’s 2015 customer growth was 2.9%, or about 28,000 net new customers, including the addition of more than 6,500 customers from the acquisition of Eagle Mountain City’s municipal gas-distribution system. |

|         |                                                                                                                                                                                                                                                                         |
|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Utah and Wyoming regulators approved the addition of Wexpro’s 2014 Canyon Creek acquisition as a cost-of-service property and agreed to a lower return on future Wexpro development spending to enable Wexpro to resume its development-drilling program in 2016. |

|         |                                                                                                                                                           |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Questar Pipeline successfully and safely completed the final portion of its multi-year Mainline-3 replacement project ahead of schedule and under budget. |

|         |                                                                                                                                                                                                     |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Questar Pipeline reduced its combined operating and maintenance ("O&M") and general and administrative ("G&A") expenses by 2% for the year through cost controls and improved efficiencies. |

|         |                                                                                                                                                                                      |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Questar Pipeline terminated plans to recommission the western segment of the Southern Trails Pipeline as a crude-oil transport pipeline and commenced a process to divest the asset. |

|         |                                                                                                                            |
|---------|----------------------------------------------------------------------------------------------------------------------------|
| • | Questar increased its first quarter 2016 dividend by 5% to $0.22 per share. This is in addition to an 11% increase in 2015 |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 14 |   |

----

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1  | Adjusted earnings differs from net income by excluding one-time items that are outside the normal earnings process. In 2013, this included an after-tax impairment charge of $52.4 million for the Southern Trails Pipeline. No one-time items were recorded in 2014. In 2015, these items included a $10.3 million charge for pension settlement costs  and a $7.9 million charge for the impairment of certain oil and gas properties. |

|        |
|--------|
|        |
|   |

|         |                                                                                                                                                                                                               |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1  | Target amounts reflect actual base salary, target bonus, actual restricted stock units (RSUs) granted and target performance shares awarded for the applicable year multiplied by the grant date stock price. |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 2  | The amounts realized/realizable reflect amounts/shares actually paid/granted in the applicable year modified based on 1) for the annual bonus, the actual amount earned due to actual performance, 2) for RSUs, the shares granted multiplied by Questar's stock price as of December 31, 2015, and 3) for performance shares, the shares actually earned or on track to earn for all three performance periods based on performance and stock price as of December 31, 2015.  The 2015-2018 performance shares are projected to be below threshold with no payout and therefore, no value is provided. |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 15 |   |

----

|        |
|--------|
|        |
|   |

|         |                                                                                                                                                                                                                                                                                                                                                                                              |
|---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1  | The percentages are based on the values stated in the 2015 Summary Compensation Table except 1) the target bonus is based on the 2015 target annual incentive set for each named executive officer, and 2) the performance shares are based on the target number of performance shares set for each named executive officer multiplied by the closing stock price on the grant date. |

|         |                                                                                                                                                                                                                                                                        |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Pay for performance – The MPC, comprised of only independent directors, ties a significant portion of each named executive officer's total direct compensation opportunity to near-term financial and operational results and long-term shareholder returns. |

|         |                                                                                                                                                                                                                           |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Annual executive compensation review – The MPC annually reviews all compensation elements provided to our named executive officers and, where appropriate, makes changes to incorporate current best practices. |

|         |                                                                                                                                                           |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Independent compensation consultant – The MPC has retained its own independent compensation consultant since 2006 to assist with annual review. |

|         |                                                                                                                                                                                                        |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Annual benchmarking – The MPC reviews benchmark compensation data of Questar's peer group and generally targets compensation at the 50th percentile, although individual positioning varies. |

|         |                                                                                                                                                                                                                        |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Annual risk analysis – The MPC annually reviews, analyzes and considers if our compensation policies and practices create risks that are reasonably likely to have a material adverse effect on the Company. |

|         |                                                                                                         |
|---------|---------------------------------------------------------------------------------------------------------|
| • | Share-ownership guidelines – Questar has adopted share-ownership guidelines for all officers. |

|         |                                                                                                                                                     |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Minimal perquisites – The Company provides officers with only one perquisite – the opportunity for an executive fitness evaluation. |

|         |                                                                                 |
|---------|---------------------------------------------------------------------------------|
| • | Clawback policy – Questar adopted a clawback policy in February 2014. |

|         |                                                                                                                                                                                                                |
|---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Double trigger under CIC  – The Company's change-in-control (CIC) severance plan provides for cash payments after a change in control only if an officer also is terminated following the event. |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 16 |   |

----

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Double trigger for accelerated equity upon CIC – Effective for equity awards made on or after February 2015, under the terms of the awards, unvested equity is accelerated due to a change in control only upon a double-triggering event. See "Treatment of Compensation Plans upon Effectiveness of Dominion Merger" in the Compensation Tables for information regarding treatment of awards in connection with the Dominion Merger. |

|         |                                                                                                                                                                  |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Minimum Vesting – The Company's Board approved a minimum vesting period of at least 12 months for restricted stock and RSUs (with limited exceptions). |

|         |                                                                                                                                                                                                                                                                                     |
|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Performance Share Payout – In February 2015 Questar's Board added an absolute TSR requirement to our Performance Shares which requires annualized TSR of at least 15 percent to earn the maximum award.  Additionally, the award would be further reduced if TSR is negative. |

|         |                                                                                                        |
|---------|--------------------------------------------------------------------------------------------------------|
| • | No employment agreements – Questar has no individual employment agreements with any officer. |

|         |                                                                                                                             |
|---------|-----------------------------------------------------------------------------------------------------------------------------|
| • | No separate change-in-control agreements – All officers participate in the same change-in-control severance plan. |

|         |                                                                                                                                      |
|---------|--------------------------------------------------------------------------------------------------------------------------------------|
| • | No excise tax gross-ups upon change in control – The Company does not provide excise tax gross-ups for severance benefits. |

|         |                                                                                 |
|---------|---------------------------------------------------------------------------------|
| • | No short-sales or hedging of Questar's common stock, and no excessive pledging. |

|         |                                     |
|---------|-------------------------------------|
| • | No repricing of underwater options. |

|         |                                                                                                                                                                                              |
|---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | attract, motivate, reward and retain the management talent required to achieve Company objectives at compensation levels that are fair, equitable and competitive with comparable companies; |

|         |                                                                               |
|---------|-------------------------------------------------------------------------------|
| • | focus management efforts on short and long-term drivers of shareholder value; |

|         |                                                                                                                                |
|---------|--------------------------------------------------------------------------------------------------------------------------------|
| • | tie a significant portion of executive compensation to Company long-term stock price performance and thus shareholder returns; |

|         |                                                                                                                    |
|---------|--------------------------------------------------------------------------------------------------------------------|
| • | foster a results-oriented culture while enhancing Questar’s reputation for ethics, integrity and safety; and |

|         |                                                                                                                        |
|---------|------------------------------------------------------------------------------------------------------------------------|
| • | create balance across multiple financial and operating metrics and time periods to support sound risk management. |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 17 |   |

----

|                               |
|-------------------------------|
|                               |  |  |  |  |  |  |  |
|                          |   |   |   | Comparative Data1 |
| Company Name                  | Distribution | Midstream | Production | Enterprise Value2($) | Market Cap.($) | Revenue($) | Assets($) |
|                          |   |   |   | (in billions) |
| AGL Resources, Inc.           | X | X |   | 10.44 | 6.13 | 4.62 | 14.66 |
| Atmos Energy Corp.            | X | X |   | 6.62 | 4.79 | 3.89 | 7.94 |
| Energen Corp.                 | X |   | X | 7.08 | 5.29 | 1.74 | 6.62 |
| EQT Corporation               |   | X | X | 15.19 | 13.87 | 1.86 | 9.79 |
| MDU Resources Group Inc.      | X | X | X | 7.61 | 5.39 | 4.46 | 7.06 |
| National Fuel Gas Company     | X | X | X | 7.33 | 5.89 | 1.83 | 6.22 |
| New Jersey Resources Corp.3   | X | X |   | 2.77 | 2.13 | 3.20 | 3.01 |
| NiSource Inc.                 | X | X |   | 19.10 | 12.92 | 5.66 | 22.65 |
| Northwest Natural Gas Co.     | X | X |   | 2.08 | 1.15 | 0.78 | 2.97 |
| Piedmont Natural Gas Co.      | X | X |   | 4.26 | 2.63 | 1.28 | 4.37 |
| South Jersey Industries, Inc. | X | X |   | 2.87 | 1.77 | 0.73 | 2.93 |
| Southwest Gas Corp.           | X |   |   | 3.94 | 2.26 | 1.95 | 4.57 |
| Vectren Corporation           | X |   |   | 4.78 | 3.29 | 1.49 | 5.10 |
| WGL Holdings, Inc.            | X |   |   | 3.20 | 2.19 | 2.47 | 4.26 |
|                          |   |   |   |   |   |   |   |
| 50th Percentile               |   |   |   | 5.70 | 4.04 | 2.21 | 5.66 |
| Questar Corporation4          | X | X | X | 5.57 | 3.91 | 1.22 | 4.05 |

|        |
|--------|
|        |
|   |

|         |                                                                                                                                                                                                                                                  |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1  | Information obtained from Standard & Poor's Research Insight. Data reflects market capitalization values as of September 2014, and revenue and assets as of the most recent fiscal year as of October 2014 when the peer group was reviewed. |

|         |                                                                                                                                   |
|---------|-----------------------------------------------------------------------------------------------------------------------------------|
| 2  | Enterprise value represents market capitalization plus debt and preferred stock minus cash as of the most recent fiscal year end. |

|         |                                                                                                                                                               |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 3  | CEO data from New Jersey Resources Corporation is not considered in setting our CEO compensation because New Jersey Resources' CEO serves on Questar's Board. |

|         |                                                                                              |
|---------|----------------------------------------------------------------------------------------------|
| 4  | Questar's revenues do not include approximately $372 million of affiliated company revenues. |

|         |                                                                                                                                                                                            |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Towers Watson's Survey on Top Management Compensation, Utility Company Cut; and Mercer Benchmark Database, Executive, Utility Company Cut – both surveys of large utility companies. |

|         |                                                                     |
|---------|---------------------------------------------------------------------|
| • | NGTI Survey – a survey of gas transmission-related positions. |

|         |                                                                                                                                        |
|---------|----------------------------------------------------------------------------------------------------------------------------------------|
| • | ECI – Oil and Gas E&P Industry Compensation Survey – a survey of oil and gas exploration and production organizations. |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 18 |   |

----

|                     |
|---------------------|
|                     |  |  |  |  |
| Officer             | Peer Proxy Data | Towers | NGTI | ECI |
| Ronald W. Jibson    | X | X |   |   |
| Kevin W. Hadlock    | X | X |   |   |
| Thomas C. Jepperson | X | X |   |   |
| Craig C. Wagstaff   | X | X |   |   |
| Micheal G. Dunn1    | X |   | X |   |
| James R. Livsey2    | X |   |   | X |
| R. Allan Bradley1   | X |   | X |   |

|        |
|--------|
|        |
|   |

|          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|----------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1   | Due to the limited proxy disclosures by the selected peer groups on an individual basis, Messrs. Dunn's and Bradley's peer group was expanded to include top executives at CenterPoint Energy, ONEOK and The Williams Companies that better reflect their role as head of a FERC-regulated natural gas pipeline.  These incorporated companies that are beyond the primary peer group are significantly larger than Questar Pipeline, which the MPC considered when setting their total compensation. Mr. Dunn was hired in April, 2015 after the MPC set the compensation for Mr. Bradley, but the MPC considered the same data when approving the compensation offered to Mr. Dunn. |

|         |                                                                                                                                                                                                                                 |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 2  | The peer group proxy data failed to provide adequate comparative information for Mr. Livsey in his role as head of Wexpro, our unique natural gas-development subsidiary. Market data from ECI and other factors were utilized. |

|                                                                                                                                                    |
|----------------------------------------------------------------------------------------------------------------------------------------------------|
|                                                                                                                                                    |  |
| Compensation Component                                                                                                                             | Role in Total Compensation |
| Base Salary                                                                                                                                        | •Provides a fixed and market-based level of compensation to pay for an executive’s responsibility, relative expertise and experience |
| Annual Cash Incentive•Annual Management Incentive Plan                                                                                       | •Variable compensation component based on performance. Motivates and rewards executives for achieving annual financial and operating goals aligned with shareholder and stakeholder interests |
| Long-term Incentive•Performance Shares-   RSUs                                                                                               | •Delivers the majority of named executive officer compensation through long-term incentives aligned with shareholder interests•Motivates and rewards achieving long-term strategic Company objectives•Recognizes and rewards executives for Company performance relative to industry peers over multi-year time periods•Encourages long-term executive share ownership•Encourages executive retention by establishing multi-year incentive awards |
| Benefits•Retirement (401(k), Pension)•Nonqualified Deferred Compensation•Other security benefits (health care, life, disability) | •Provides a tax-efficient way for employees to build financial security in retirement.•Rewards extended Company service•Provides minimum income protection against certain risks |
| Termination Benefits                                                                                                                               | •Provides a competitive level of income protection for a change-in-control event that results in employment termination |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 19 |   |

----

|                     |
|---------------------|
|                     |  |  |
| Name                | 2015 Base Salary | Percent increase from 2014 |
| Ronald W. Jibson    | $825,000 | 3.13% |
| Kevin W. Hadlock    | $391,834 | 2.00% |
| Thomas C. Jepperson | $388,672 | 3.00% |
| Craig C. Wagstaff   | $375,899 | 3.00% |
| Micheal G. Dunn     | $410,000 | NA |
| James R. Livsey     | $430,985 | 3.00% |
| R. Allan Bradley    | $421,656 | 3.00% |

|                                               |
|-----------------------------------------------|
|                                               |  |  |  |  |  |
| Performance Measure                           | Weight | Performance Range(50% threshold to 200% max) | Target | Actual | Percent Payout |
| Questar adjusted income ($MM)                 | 25% | $199 - $250 | $221 | $226.5 | 119% |
| Safety – DART1 injury rate         | 5% | 1.70 - 1.00 | 1.40 | 1.43 | 95% |
| Safety – Avoidable accident rate2  | 5% | 2.30 - 1.40 | 2.00 | 1.71 | 148% |

|        |
|--------|
|        |
|   |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 20 |   |

----

|                                                     |
|-----------------------------------------------------|
|                                                     |  |  |  |  |  |
| Performance Measure                                 | Weight | Performance Range(50% threshold to 200% max) | Target | Actual | Percent Payout |
| QUESTAR GAS                                         |
| Questar Gas adjusted income ($MM)                   | 25% | $57 - $67.2 | $60.0 | $64.3 | 160% |
| O&M per customer (excluding DSM)                | 20% | $145 -  $134 | $140 | $140.35 | 97% |
| Customer satisfaction                               | 2.5% | 6.1 - 6.5 | 6.3 | 6.44 | 170% |
| Calls answered in 60 seconds                        | 2.5% | 90% - 95% | 93% | 91.5% | 75% |
| Emergency call representative on site within 1 hour | 2.5% | 95% - 99.8% | 98% | 98.1% | 105% |
| Third-Party Damages                                 | 2.5% | 3.5% - 3.2% | 3.4% | 3.07% | 200% |
| Key Initiatives1                                    | 10% | Qualitative Assessment | 100% |
| Weighted Result (including consolidated goals) | 125% |

|        |
|--------|
|        |
|   |

|                                                     |
|-----------------------------------------------------|
|                                                     |  |  |  |  |  |
| Performance Measure                                 | Weight | Performance Range(50% threshold to 200% max) | Target | Actual | Percent Payout |
| WEXPRO                                              |
| Wexpro adjusted income ($MM)                        | 25% | $95 - $124 | $108 | $105.9 | 92% |
| Lease operating expense per Mcfe                    | 15% | $0.45 - $0.38 | $0.42 | $0.38 | 190% |
| Acquisitions analyzed                               | 3.33% | 2 - 6 | $4.00 | $9.00 | 100% |
| Workover wells analyzed                             | 3.33% | 10 - 30 | 20 | 43 | 100% |
| Lease acreage bid on                                | 3.33% | 10,000 - 40,000 | 20,000 | 58,633 | 100% |
| Key Initiatives1                                    | 15% | Qualitative Assessment | —% |
| Weighted Result (including consolidated goals) | 103% |

|        |
|--------|
|        |
|   |

|                                                     |
|-----------------------------------------------------|
|                                                     |  |  |  |  |  |
| Performance Measure                                 | Weight | Performance Range(50% threshold to 200% max) | Target | Actual | Percent Payout |
| QUESTAR PIPELINE                                    |
| Questar Pipeline adjusted income ($MM)              | 25% | $55 - $66 | $59 | $59.5 | 107% |
| O&M per decatherm of demand                     | 15% | $14.65 - $13.50 | $14.15 | $13.55 | 190% |
| Transportation demand (Mdth/day) at year-end        | 10% | 5,050 - 5,300 | 5,175 | 5,221 | 131% |
| Key Initiatives1                                    | 15% | Qualitative Assessment | —% |
| Weighted Result (including consolidated goals) | 110% |

|        |
|--------|
|        |
|   |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 21 |   |

----

|                                                    |
|----------------------------------------------------|
|                                                    |  |  |  |  |  |
| Performance Measure                                | Weight | Performance Range(50% threshold to 200% max) | Target | Actual | Percent Payout |
| QUESTAR CORPORATION                                |
| Questar adjusted income ($MM)                      | 50% | $199 - $250 | $221 | $226.50 | 119% |
| Safety – DART1 injury rate                   | 5% | 1.70 - 1.00 | $1.40 | $1.43 | 95% |
| Safety – Avoidable accident rate             | 5% | 2.30 - 1.40 | $2.00 | $1.71 | 148% |
| O&M per customer (excluding DSM) - Questar Gas | 8% | $145 -  $134 | $140.0 | $140.4 | 97% |
| Lease operating expense per Mcfe - Wexpro          | 8% | $0.45 - $0.38 | $0.42 | $0.38 | 190% |
| O&M per decatherm of demand - Questar Pipeline | 8% | $14.65 - $13.50 | $14.2 | $13.6 | 190% |
| Corporate allocable O&M ($MM)                  | 6% | $45.0 - $39.0 | $43 | $59.20 | —% |
| Stakeholder value goals                            | 10% | Qualitative Assessment | 25% |
| Weighted Result                                    | 113% |

|        |
|--------|
|        |
|   |

|         |                                                                                                                                |
|---------|--------------------------------------------------------------------------------------------------------------------------------|
| 1  | Corporate key initiatives focused on: resolving the gathering litigation and supporting business unit stakeholder value goals. |

|                     |
|---------------------|
|                     |  |  |  |  |
| Name                | Target % of Base Salary | Percent Payout % | Annual Incentive Payout ($) |
| Ronald W. Jibson    | 100% | 103% | 849,750 |  |
| Kevin W. Hadlock    | 60% | 100% | 235,100 |  |
| Thomas C. Jepperson | 65% | 103% | 260,216 |  |
| Craig C. Wagstaff   | 65% | 119% | 291,857 |  |
| Micheal G. Dunn     | 65% | 111% | 209,913 |  |
| James R. Livsey     | 65% | 103% | 120,227 |  |
| R. Allan Bradley    | 65% | 110% | 125,618 |  |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 22 |   |

----

|                                                            |
|------------------------------------------------------------|
|                                                            |  |  |  |
| Questar TSR Rank Compared to Peers over Performance Period | TSR Rank Multiplier | Absolute TSR Modifier if Annualized Return > 15% | Absolute TSR Modifier if Negative |
| 1                                                          | 2.00 | 3.00 | 1.00 |
| 2                                                          | 2.00 | 3.00 | 1.00 |
| 3                                                          | 1.90 | 2.84 | 0.95 |
| 4                                                          | 1.72 | 2.57 | 0.86 |
| 5                                                          | 1.54 | 2.31 | 0.77 |
| 6                                                          | 1.36 | 2.04 | 0.68 |
| 7                                                          | 1.18 | 1.77 | 0.59 |
| 8                                                          | 1.00 | 1.50 | 0.50 |
| 9                                                          | 0.79 | 1.18 | 0.39 |
| 10                                                         | 0.57 | 0.86 | 0.29 |
| 11                                                         | 0.36 | 0.54 | 0.18 |
| 12                                                         | — | — | — |
| 13                                                         | — | — | — |
| 14                                                         | — | — | — |
| 15                                                         | — | — | — |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 23 |   |

----

|                    |
|--------------------|
|                    |  |  |
| Performance Period | Performance Measure | Status as of December 31, 2015 |
| 2013-2015          | Relative TSR | Results were certified in February 2016.  Results were below target with the Company's TSR ranking 11 out of 15. Payouts at 32 percent of target are reflected in the 2015 Option Exercises and Stock Vested Tables. |
| 2014-2016          | Relative TSR | Results will be certified in February 2017. Through December 31, 2015, payout is projected above threshold but below target.  The threshold, target and maximum awards for the 2014-2016 performance period were shown in the Grants of Plan-Based Awards table in the 2015 Proxy Statement. |
| 2015-2017          | Relative TSR | Results will be certified in February 2018. Through December 31, 2015, payout is projected to be below threshold with no payout. The threshold, target and maximum awards for the 2015-2017 performance period are shown in the Grants of Plan-Based Awards table. |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 24 |   |

----

|         |                                                                                                                                               |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------|
| • | reviews and approves participation in the annual management incentive plans, objectives and performance targets for each major business unit; |

|         |                                                                                                                           |
|---------|---------------------------------------------------------------------------------------------------------------------------|
| • | reviews our consolidated financial results and the financial and operating results of the Company's major business units; |

|         |                                                                       |
|---------|-----------------------------------------------------------------------|
| • | evaluates the individual performance of the named executive officers; |

|         |                                      |
|---------|--------------------------------------|
| • | considers internal relative pay; and |

|         |                                                                              |
|---------|------------------------------------------------------------------------------|
| • | develops and approves executive officers' annual and long-term compensation. |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 25 |   |

----

|         |                                                                                                                                                                                                                                                                    |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | reviewing, critiquing and proposing changes in Questar's compensation practices when necessary to maintain alignment with our compensation objectives, including providing the MPC recommendations regarding the Company's short and long-term incentive strategy; |

|         |                                                                                                                                                 |
|---------|-------------------------------------------------------------------------------------------------------------------------------------------------|
| • | providing advice and information on regulatory requirements and investor/shareholder policies relating to the Company's compensation practices; |

|         |                                                                                                           |
|---------|-----------------------------------------------------------------------------------------------------------|
| • | reviewing our selected peers and providing input in any deviation or recommended changes or replacements; |

|         |                                                                                                                                  |
|---------|----------------------------------------------------------------------------------------------------------------------------------|
| • | preparing benchmarking reports analyzing each executive officer's compensation using peer company proxy data and market surveys; |

|         |                                                                                                                                                            |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | reviewing MPC agendas and supporting materials before each meeting, and raising questions or issues with management and the MPC chair, as appropriate; and |

|         |                                                                          |
|---------|--------------------------------------------------------------------------|
| • | providing input on specific compensation actions for executive officers. |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 26 |   |

----

|                                  |
|----------------------------------|
|                                  |  |
| Management Performance Committee |
|                             | Christopher A. Helms, Chair |
|                             | Laurence M. Downes |
|                             | Rebecca Ranich |
|                             | Bruce A. Williamson |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 27 |   |

----

|                                                                                      |
|--------------------------------------------------------------------------------------|
|                                                                                      |  |  |  |  |  |  |  |  |  |  |
| Name and Principal Position (a)                                                      | Year(b) | Salary($)(c) | Bonus1($)(d) |  | StockAwards2($)(e) | OptionAwards($)(f) | Non-EquityIncentivePlanCompensa-tion3($)(g) | Change inPension Value and NonqualifiedDeferredCompensationEarnings4($)(h) | All Other Compen-sation5($)(i) | Total($)(j) |
| Ronald W. JibsonChairman, President & CEO                                        | 2015 | 820,834 |  |  | 1,742,169 |  | 849,750 | 457,574 | 15,900 | 3,886,227 |
| 2014                                                                                 | 795,417 |  |  | 2,201,348 |  | 1,064,000 | 2,727,095 | 15,600 | 6,803,460 |
| 2013                                                                                 | 768,750 |  |  | 2,393,605 |  | 1,181,925 | 2,966,083 | 15,300 | 7,325,663 |
| Kevin W. HadlockExecutive Vice President and CFO                                     | 2015 | 390,554 |  |  | 378,515 |  | 235,100 |  | 26,300 | 1,030,469 |
| 2014                                                                                 | 382,896 |  |  | 452,886 |  | 306,553 |  | 12,775 | 1,155,110 |
| 2013                                                                                 | 374,791 |  |  | 484,648 |  | 345,736 |  | 15,300 | 1,220,475 |
| Thomas C. JeppersonChief Operating Officer                                           | 2015 | 386,785 |  |  | 598,263 |  | 260,216 | 542,237 | 23,374 | 1,810,875 |
| 2014                                                                                 | 375,517 |  |  | 722,792 |  | 326,212 | 337,805 | 22,645 | 1,784,971 |
| 2013                                                                                 | 364,002 |  |  | 835,400 |  | 364,336 | 73,889 | 22,074 | 1,659,701 |
| Craig C. WagstaffExecutive Vice President, President Questar Gas                     | 2015 | 374,074 |  |  | 399,190 |  | 291,857 | 265,683 | 23,129 | 1,353,933 |
| 2014                                                                                 | 363,178 |  |  | 482,244 |  | 326,484 | 774,725 | 22,618 | 1,969,249 |
| 2013                                                                                 | 352,600 |  |  | 484,648 |  | 332,175 | 380,138 | 22,114 | 1,571,675 |
| Micheal G. Dunn Executive Vice President, President Questar Pipeline                 | 2015 | 290,417 | 400,000 |  | 721,197 |  | 209,913 |  | 15,900 | 1,637,427 |
| James R. LivseyFormer Executive Vice President, COO Wexpro                           | 2015 | 177,485 |  |  | 224,786 |  | 120,227 | 879,682 | 365,900 | 1,768,080 |
| 2014                                                                                 | 415,111 |  |  | 942,565 |  | 396,548 | 520,639 | 15,600 | 2,290,463 |
| 2013                                                                                 | 396,573 |  |  | 1,037,515 |  | 364,844 | 730,957 | 15,300 | 2,545,189 |
| R. Allan BradleyFormer Executive Vice President, President and CEO, Questar Pipeline | 2015 | 173,643 |  |  | 220,520 |  | 125,618 | 454,918 | 15,900 | 990,599 |
| 2014                                                                                 | 407,388 |  |  | 924,634 |  | 396,746 | 252,114 | 15,600 | 1,996,482 |
| 2013                                                                                 | 395,522 |  |  | 1,037,515 |  | 407,923 | 245,551 | 15,300 | 2,101,811 |

|        |
|--------|
|        |
|   |

|         |                                                                                                                                                                                                        |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1  | Upon Mr. Dunn's hire date, he received a signing bonus.  Mr. Dunn is required to repay such bonus on a pro-rated basis should he leave his employment prior to the third anniversary of his hire date. |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 2  | The amounts reported as stock awards are: the aggregate grant date fair value of RSUs and performance shares granted in 2013, 2014 and 2015 determined under share-based compensation accounting guidance in accordance with FASB ASC Topic 718.  For performance share awards, values reflect the value of the performance shares at the probable outcome of Company performance. The grant date fair market values of these awards at the maximum payout levels are: |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 28 |   |

----

|               |
|---------------|
|               |  |  |  |  |  |  |
| Name          | 2015-2017 Performance Shares($) |  | 2014-2016 Performance Shares($) |  | 2013-2015 Performance Shares($) |  |
| Mr. Jibson    | 2,946,492 |  | 4,384,039 |  | 4,780,787 |  |
| Mr. Hadlock   | 525,540 |  | 772,152 |  | 910,943 |  |
| Mr. Jepperson | 276,902 |  | 821,553 |  | 1,570,141 |  |
| Mr. Wagstaff  | 554,246 |  | 822,205 |  | 910,943 |  |
| Mr. Dunn      | 1,064,833 |  |  |  |  |  |
| Mr. Livsey    | 150,470 |  | 758,916 |  | 1,570,854 |  |
| Mr. Bradley   | 147,631 |  | 744,468 |  | 1,570,854 |  |

|         |                                                                                                                                                                                                                                                                                                     |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 3  | Amounts reported reflect Company AMIP payments received. The amount listed for Mr. Jepperson for 2013, and the amounts listed for Messrs. Jepperson and Wagstaff for 2014 and 2015, include amounts voluntarily deferred by them under the Questar Corporation Deferred Compensation Wrap Plan. |

|               |
|---------------|
|               |  |  |
| Name          | 2015 Total Compensation without Change in Pension Value($) |  |
| Mr. Jibson    | 3,428,653 |  |
| Mr. Hadlock   | 1,030,469 |  |
| Mr. Jepperson | 1,268,638 |  |
| Mr. Wagstaff  | 1,088,250 |  |
| Mr. Dunn      | 1,637,427 |  |
| Mr. Livsey    | 888,398 |  |
| Mr. Bradley   | 535,681 |  |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 29 |   |

----

|               |
|---------------|
|               |  |  |  |  |  |  |  |  |
| Name          | 401(k) Employer Match and Non-elective contribution($) |  | Paid Time-Off Sold($) |  | Separation Payment($) |  | Total($) |  |
| Mr. Jibson    | 15,900 |  |  |  |  | 15,900 |  |
| Mr. Hadlock   | 26,300 |  |  |  |  | 26,300 |  |
| Mr. Jepperson | 15,900 |  | 7,474 |  |  |  | 23,374 |  |
| Mr. Wagstaff  | 15,900 |  | 7,229 |  |  |  | 23,129 |  |
| Mr. Dunn      | 15,900 |  |  |  |  |  | 15,900 |  |
| Mr. Livsey    | 15,900 |  |  |  | 350,000 |  | 365,900 |  |
| Mr. Bradley   | 15,900 |  |  |  |  | 15,900 |  |

|                     |
|---------------------|
|                     |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Name(a)             | GrantDate(b) | Estimated Future PayoutsUnder Non-Equity Incentive Plan Awards1 | Estimated Future PayoutsUnder Equity IncentivePlan Awards2 | All OtherStockAwards:Number ofSharesof Stockor Units3(#)(i) |  | GrantDateFairValue ofStock &OptionAwards4($)(l) |  |
| Threshold($)(c)     |  | Target($)(d) |  | Maximum($)(e) |  | Threshold(#)(f) |  | Target(#)(g) |  | Maximum(#)(h) |  |
| Ronald W. Jibson    | Feb 18, 2015 | 20,625 |  | 825,000 |  | 1,650,000 |  |   |   |   |   |  |  |
| Feb 18, 2015   |   |   |   | 8,407 |  | 46,703 |  | 140,109 |  |   | 982,164 |  |
| Feb 18, 2015   |   |   |   |   |   |   | 31,135 |  | 760,005 |  |
| Kevin W. Hadlock    | Feb 18, 2015 | 5,878 |  | 235,100 |  | 470,200 |  |   |   |   |   |   |
| Feb 18, 2015   |   |   |   | 1,499 |  | 8,330 |  | 24,990 |  |   | 175,180 |  |
| Feb 18, 2015   |   |   |   |   |   |   | 8,330 |  | 203,335 |  |
| Thomas C. Jepperson | Feb 18, 2015 | 6,316 |  | 252,637 |  | 505,274 |  |   |   |   |   |   |
| Feb 18, 2015   |   |   |   | 790 |  | 4,389 |  | 13,167 |  |   | 92,301 |  |
| Feb 18, 2015   |   |   |   |   |   |   | 13,166 |  | 321,382 |  |
| Craig C. Wagstaff   | Feb 18, 2015 | 6,108 |  | 244,334 |  | 488,668 |  |   |   |   |   |   |
| Feb 18, 2015   |   |   |   | 1,581 |  | 8,785 |  | 26,355 |  |   | 184,749 |  |
| Feb 18, 2015   |   |   |   |   |   |   | 8,785 |  | 214,442 |  |
| Micheal G. Dunn     | Apr 16, 2015 | 4,719 |  | 188,771 |  | 377,542 |  |   |   |   |   |  |  |
| Apr 16, 2015   |   |   |   | 3,038 |  | 16,878 |  | 50,634 |  |   | 321,188 |  |
| Apr 16, 2015   |   |   |   |   |   |   | 16,878 |  | 400,009 |  |
| James R. Livsey     | Feb 18, 2015 | 2,918 |  | 116,725 |  | 233,450 |  |   |   |   |   |  |  |
| Feb 18, 2015   |   |   |   | 429 |  | 2,385 |  | 7,155 |  |   | 50,157 |  |
| Feb 18, 2015   |   |   |   |   |   |   | 7,154 |  | 174,629 |  |
| R. Allan Bradley    | Feb 18, 2015 | 2,855 |  | 114,198 |  | 228,396 |  |   |   |   |   |  |  |
| Feb 18, 2015   |   |   |   | 421 |  | 2,340 |  | 7,020 |  |   | 49,210 |  |
| Feb 18, 2015   |   |   |   |   |   |   | 7,018 |  | 171,309 |  |

|        |
|--------|
|        |
|   |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1  | The amounts represent the annual incentive plan award opportunities granted in February 2015 to each named executive officer for the 2015 performance period. The target amount was based on the target percentage and base salaries as of March 1, 2015. Actual payments under these awards have already been determined and are included in the Non-Equity Incentive Plan Compensation column of the Summary Compensation Table. Messrs. Dunn, Livsey and Bradley received a pro-rated portion based on the months they were employed. |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 2  | The values under these columns represent the number of performance shares granted to named executive officers in 2015. It shows potential threshold, target or maximum payout amounts granted for the three-year performance period from January 1, 2015, to December 31, 2017. The method to calculate actual payout amounts is described in more detail above under the Long-term Equity Incentive Awards of the CD&A. The grant date fair value of the target shares is included in the Stock Awards column of the 2015 Summary Compensation Table. For a discussion of the performance share awards for 2015, see the CD&A section above.  Values reflect Messrs. Jepperson, Livsey, Bradley pro-rated performance shares due to retirement.  If they had not retired the targets for Messrs. Jepperson, Livsey, Bradley would have been 13,166, 17,169 and 16,843 respectively. |

|         |                                                                                                                                                                                                                                                                                                                                                                                                         |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 3  | This column represents RSU grants made in February 2015, which grants vest over a three-year period, starting approximately one year after the grant date, with one-third of the units vesting in each remaining year. Values reflect forfeitures of grants to Messrs. Livsey and Bradley due to their retirement.  If they had not retired, the grants would have been 17,169 and 16,843 respectively. |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 4  | The grant date fair value of stock awards is calculated in accordance with FASB ASC Topic 718. The assumptions used in determining grant date fair value of these awards are described in Note 11 to the consolidated financial statements included in Item 8 of Part II of Questar’s 2015 Form 10-K. This does not reflect the actual value a named executive officer may receive, which depends on meeting actual performance for the performance shares and market prices. There is no assurance that the amounts reflected will be realized. |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 30 |   |

----

|                     |
|---------------------|
|                     |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|                |   | Option Awards1 | Stock Awards |
| Name(a)             | Grant Date(b) | Number ofSecuritiesUnderlyingUnexercisedOptionsExercisable2(#)(c) |  | Number ofSecuritiesUnderlyingUnexercisedOptions Unexercisable(#)(d) | OptionExercise Price3($)(e) |  | Option Expiration Date(f) |  Number of Shares or Units of Stock that have not Vested4(#)(g) |  | Market Value of Shares or Units of Stock that have not Vested4($)(h) |  | Equity Incentive Plan Awards:  Number of Unearned Shares, Units or Rights that have not Vested5(#)(i) |  | Equity Incentive Plan Awards:  Market or Payout Value of Unearned Shares, Units or Rights that have not Vested5($)(j) |  |
| Ronald W. Jibson    | Feb 10, 2009 | 25,000 |  |  | 11.40 |  | Mar 5, 2016 |  |  |  |  |  |  |  |  |
| Feb 9, 2010    | 12,000 |  |  | 13.10 |  | Mar 5, 2017 |  |  |  |  |  |  |  |  |
| Feb 12, 2013   |  |  |  |  |  |  | 11,290 |  | 219,929 |  |  |  |  |  |
| Feb 11, 2014   |  |  |  |  |  |  | 20,904 |  | 407,210 |  | 47,034 |  | 916,222 |  |
| Feb 18, 2015   |  |  |  |  |  |  | 31,135 |  | 606,510 |  | 8,407 |  | 163,768 |  |
| Kevin W. Hadlock    | Feb 12, 2013 |  |  |  |  |  |  | 2,554 |  | 49,752 |  |  |  |  |  |
| Feb 11, 2014   |  |  |  |  |  |  | 5,522 |  | 107,569 |  | 8,284 |  | 161,372 |  |
| Feb 18, 2015   |  |  |  |  |  |  | 8,330 |  | 162,268 |  | 1,499 |  | 29,201 |  |
| Thomas C. Jepperson | Feb 12, 2013 |  |  |  |  |  |  | 4,403 |  | 85,770 |  |  |  |  |  |
| Feb 11, 2014   |  |  |  |  |  |  | 8,814 |  | 171,697 |  | 13,166 |  | 256,474 |  |
| Feb 18, 2015   |  |  |  |  |  |  | 13,166 |  | 256,474 |  | 2,370 |  | 46,168 |  |
| Craig C. Wagstaff   | Feb 12, 2013 |  |  |  |  |  |  | 2,554 |  | 49,752 |  |  |  |  |  |
| Feb 11, 2014   |  |  |  |  |  |  | 5,880 |  | 114,542 |  | 8,821 |  | 171,833 |  |
| Feb 18, 2015   |  |  |  |  |  |  | 8,785 |  | 171,132 |  | 1,581 |  | 30,798 |  |
| Micheal G. Dunn     | Apr 16, 2015 |  |  |  |  |  |  | 16,878 |  | 328,783 |  | 3,038 |  | 59,180 |  |
| James R Livsey      | Feb 12, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Feb 11, 2014   |  |  |  |  |  |  |  |  |  |  | 8,142 |  | 158,606 |  |
| Feb 18, 2015   |  |  |  |  |  |  |  |  |  |  | 429 |  | 8,357 |  |
| R. Allan Bradley    | Feb 10, 2009 | 31,522 |  |  | 11.40 |  | Mar 5, 2016 |  |  |  |  |  |  |  |  |
| Feb 9, 2010    | 15,540 |  |  | 13.10 |  | Mar 5, 2017 |  |  |  |  |  |  |  |  |
| Feb 12, 2013   |  |  |  |  |  |  | 5,468 |  | 106,517 |  |  |  |  |  |
| Feb 11, 2014   |  |  |  |  |  |  | 11,275 |  | 219,637 |  | 7,987 |  | 155,587 |  |
| Feb 18, 2015   |  |  |  |  |  |  | 7,018 |  | 136,711 |  | 421 |  | 8,201 |  |

|        |
|--------|
|        |
|   |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1  | The outstanding options granted prior to July 1, 2010, do not reflect QEP Resources ("QEP") options obtained when Questar spun off QEP on June 30, 2010. In conjunction with the spinoff, all outstanding Questar stock options were adjusted into two separate awards -- one denominated in Questar stock and one in QEP stock. The number of QEP stock options was equal to the number of Questar stock options the officer would have received effective on spin date (i.e., a ratio of one share of QEP stock for every share of Questar stock). The adjustment preserved, but did not increase, the equity awards’ value. |

|         |                                                                            |
|---------|----------------------------------------------------------------------------|
| 2  | Options granted are fully exercisable. No options were granted after 2010. |

|         |                                                                                                                                                                                                              |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 3  | The disclosed exercise price is an adjusted price due to the spin-off of QEP.  The original exercise price was $35.38 for options granted February 10, 2009 and $40.65 for options granted February 9, 2010. |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 4  | Columns (g) and (h) reflect the number of shares of unvested RSUs that remain outstanding and corresponding market value based on Questar's common stock closing market price on December 31, 2015. These awards vest over three years in three equal installments starting on March 5 of the year following the grant year.  The vesting of Mr. Jepperson's 26,383 unvested RSUs were accelerated and distributed upon his December 31, 2015 retirement.  The vesting of Mr. Livsey's 24,116 unvested RSUs were accelerated and distributed on May 21, 2015 in conjunction with his retirement.  The MPC amended Mr. Bradley's unvested RSUs in conjunction with his retirement to provide for continued vesting over the three years notwithstanding his retirement. |

|         |                                                                                                                                                                                                                                                                                  |
|---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 5  | Columns (i) and (j) relate to performance shares granted in 2014 and 2015. These shares become earned and vested at the end of a three-year performance period from, respectively, January 1, 2014 - December 31, 2016, and January 1, 2015 - December 31, 2017. The |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 31 |   |

----

|                     |
|---------------------|
|                     |  |  |  |  |  |  |  |  |  |
|                | Option Awards |   | Stock Awards1 |
| Name(a)             | Number of SharesAcquiredon Exercise(#)(b) |  | ValueRealized on Exercise ($)(c) |  |   | Number of SharesAcquired on Vesting(#)(d) |  | ValueRealized on Vesting     ($)(e) |  |
| Ronald W. Jibson    |  |  |  |  |   | 48,367 |  | 1,147,125 |  |
| Kevin W. Hadlock    |  |  |  |  |   | 10,776 |  | 254,876 |  |
| Thomas C. Jepperson |  |  |  |  |   | 18,295 |  | 432,828 |  |
| Craig C. Wagstaff   |  |  |  |  |   | 10,955 |  | 259,042 |  |
| James R Livsey      |  |  |  |  |   | 21,892 |  | 516,534 |  |
| R. Allan Bradley    | 10,938 |  | 119,636 |  |   | 21,783 |  | 513,997 |  |

|  |
|--|
|  |
|  |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
|---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1  | Represents the vesting of RSUs and the last tranche of restricted stock in 2015 and performance shares earned for the 2013-2015 performance period that vested on December 31, 2015, but were not paid until after February 16, 2016, when the MPC certified results and amounts earned. One-half of shares earned were paid in cash based on fair market value of Questar's stock on February 16, 2016. The following table details 2015 stock awards vested and value realized. The value realized equals market value on the vesting date multiplied by the number of shares (including shares for which awards were paid in cash). |

|                     |
|---------------------|
|                     |  |  |  |  |  |  |  |  |  |
|                | Restricted Stock/ RSUs Vested |   | Performance Shares Vested |
| Name(a)             | Number of SharesAcquiredon Vesting(#)(b) |  | ValueRealized on Vesting ($)(c) |  |   | Number of SharesAcquired on Vesting(#)(d) |  | ValueRealized on Vesting     ($)(e) |  |
| Ronald W. Jibson    | 35,495 |  | 825,969 |  |   | 12,872 |  | 321,156 |  |
| Kevin W. Hadlock    | 8,324 |  | 193,699 |  |   | 2,452 |  | 61,177 |  |
| Thomas C. Jepperson | 14,067 |  | 327,339 |  |   | 4,228 |  | 105,489 |  |
| Craig C. Wagstaff   | 8,503 |  | 197,865 |  |   | 2,452 |  | 61,177 |  |
| James R Livsey      | 17,662 |  | 410,995 |  |   | 4,230 |  | 105,539 |  |
| R. Allan Bradley    | 17,553 |  | 408,458 |  |   | 4,230 |  | 105,539 |  |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 32 |   |

----

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 33 |   |

----

|                      |
|----------------------|
|                      |  |  |  |  |  |
| Name(a)              | Plan(b) | Number of YearsCredited Service1(#)(c) | Present Value ofAccumulatedBenefit2($)(d) | Payments During Last Fiscal Year3($)(e) |  |
| Ronald W. Jibson4    | Pension Plan | 35.19 | 1,732,500 |  |  |
|                 | SERP | 35.19 | 12,612,854 |  |  |
| Kevin W. Hadlock5    | Pension Plan |  |  |  |  |
|                 | SERP |  |  |  |  |
| Thomas C. Jepperson4 | Pension Plan | 27.76 | 1,581,511 |  |  |
|                 | SERP | 27.76 | 3,640,918 |  |  |
| Craig C. Wagstaff    | Pension Plan | 32.00 | 1,040,830 |  |  |
|                 | SERP | 32.00 | 2,218,486 |  |  |
| Micheal G. Dunn5     | Pension Plan |  |  |  |  |
|                 | SERP |  |  |  |  |
| James R. Livsey4     | Pension Plan | 30.19 | 1,712,335 | 38,992 |  |
|                 | SERP | 30.19 | 4,714,286 | 1,064,094 |  |
| R. Allan Bradley     | Pension Plan | 10.95 | 667,987 | 667,987 |  |
|                 | SERP | 10.95 | 1,852,157 |  |  |

|        |
|--------|
|        |
|   |

|         |                                                                                                                                                                                                                                                                                                                                                                                          |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1  | The years of credited service for the named executives to the extent they are not age 55 assumes they were eligible for early retirement as of December 31, 2015.  A full year of credit is given in a participant's last year of service when a participant is eligible for early retirement (age 55 with 10 years of service) and has worked 1,000 hours with a participating company. |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 2  | Except for Messrs. Jepperson, Livsey and Bradley, the present value of accumulated benefit calculation is based on an assumed retirement date at the later of: age 62 (the earliest age a Pension Plan participant may retire without a benefit reduction due to age) or January 1, 2016. The calculation above, as well as the calculation for the change in pension value and nonqualified deferred compensation earnings in the Summary Compensation Table, also uses the following year-end financial disclosure assumptions: |

|         |                                                                              |
|---------|------------------------------------------------------------------------------|
| • | Marital status: 80% married with spouses three years younger than executives |

|         |                 |
|---------|-----------------|
| • | Form of Payment |

|         |                                                                                                                              |
|---------|------------------------------------------------------------------------------------------------------------------------------|
| ◦ | Pension:    Married – 60 percent electing lump sum; 40 percent electing 50% Joint & Survivor (J&S) annuity |

|         |                                         |
|---------|-----------------------------------------|
| ◦ | SERP:      Lump sum |

|         |               |
|---------|---------------|
| • | Discount rate |

|         |                                                                                             |
|---------|---------------------------------------------------------------------------------------------|
| ◦ | Pension:    4.50 percent as of 1/1/2016 and 4.10 percent as of 1/1/2015 |

|         |                                                                                           |
|---------|-------------------------------------------------------------------------------------------|
| ◦ | SERP:     3.10 percent as of 1/1/2016 and 2.90 percent as of 1/1/2015 |

|         |                                                                                                                                                                                                                                                                                          |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | Post-normal retirement age (NRA) mortality: RP-2015 Annuitant table, using Scale MP-2015 with generational projection as of 1/1/2016 and RP-2014 Annuitant table, using Scale MP-2014 with generational projections as of 1/1/2015.  No post retirement mortality was used for the SERP. |

|         |                                        |
|---------|----------------------------------------|
| • | Lump sum conversion at January 1, 2016 |

|         |                                                                       |
|---------|-----------------------------------------------------------------------|
| ◦ | Pension: 2016 PPA Uniform Combined Optional Mortality Table and 4.50% |

|         |                                                    |
|---------|----------------------------------------------------|
| ◦ | SERP: 1983 Group Annuity Mortality Table and 3.60% |

|         |                                                                                                                                                                           |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 3  | Payments of the pension plan and SERP benefits to Mr. Livsey and Bradley were made pursuant to their elections subject to any delay as specified under Code Section 409A. |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 3  | Messrs. Jibson, Jepperson and Livsey also have a supplemental retirement benefit provided when Questar changed its vacation policy on January 1, 1997. Benefits were calculated by multiplying their December 31, 1996, base salaries by hours accrued under the service-date vacation schedule in place prior to the change. These benefits are frozen and include $354 for Mr. Jibson, $1,616 for Mr. Jepperson and $3,006 for Mr. Livsey. |

|         |                                                                                                                                                        |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------|
| 4  | Messrs. Hadlock and Dunn are not eligible to participate in the Pension Plan or SERP as they were hired after the Pension Plan closed on July 1, 2010. |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 34 |   |

----

|                     |
|---------------------|
|                     |  |  |  |  |  |  |
| Name(a)             | ExecutiveContributionsin Last FY1($) (b) | RegistrantContributionsin Last FY2($)(c) | AggregateEarningsin Last FY3($)(d) | AggregateWithdrawals/Distributions($)(e) |  | AggregateBalance atLast FYE($)(f) |
| Ronald W. Jibson    | 97,128 | 97,128 | 38,034 |  |  | 948,931 |
| Kevin W. Hadlock    | 25,907 | 44,640 | 8,231 |  |  | 216,496 |
| Thomas C. Jepperson | 346,551 | 22,802 | 61,217 |  |  | 1,547,832 |
| Craig C. Wagstaff   | 104,495 | 26,196 | 13,335 |  |  | 638,279 |
| Micheal Dunn        | 500 | 500 |  |  |  | 1,008 |
| James R Livsey      | 19,588 | 19,588 | 16,622 | 388,281 |  |  |
| R. Allan Bradley    | 19,347 | 19,347 | 45,424 | 619,033 |  | 458,631 |

|        |
|--------|
|        |
|   |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1  | The named executives automatically participate in the 401(k) Supplemental Program when their compensation exceeds the compensation cap ($265,000 in 2015) and they can no longer make 401(k) Plan deferrals.  Amounts reported also include amounts voluntarily deferred under the Deferred Compensation Program, which are also included in the Summary Compensation Table in the Salary column (for 2015) and the Non-Equity Incentive Plan Compensation column (for 2014). |

|         |                                                                                                                                    |
|---------|------------------------------------------------------------------------------------------------------------------------------------|
| 2  | The amounts reported include employer match under the 401(k) Supplemental Program and under the Deferred Compensation Program.   n |

|         |                                                                                                                                          |
|---------|------------------------------------------------------------------------------------------------------------------------------------------|
| 3  | Aggregate earnings are not included in the Summary Compensation Table because they do not include above-market or preferential earnings. |

|                     |
|---------------------|
|                     |  |  |  |  |  |  |  |  |  |  |  |
| Name                | Non-equity Incentive Plan Payments1($) |  | RSUs2($) |  | Performance Shares3($) |  | Separation Payment($) |  | Total($) |  |
| Thomas C. Jepperson | 260,216 |  | 513,941 |  | 269,448 |  |  | 1,043,605 |  |
| James R. Livsey     | 120,227 |  | 547,433 |  | 249,369 |  | $ | 350,000 |  | 1,267,029 |  |
| R. Allan Bradley    | 125,618 |  | 539,375 |  | 246,192 |  |  | 911,185 |  |

|        |
|--------|
|        |
|   |

|         |                                                                                                                                                                                                                                                                                                                                                                                     |
|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1  | The Non-Equity Incentive Plan values are the same as those shown in the Summary Compensation Table.  Upon their retirement, the annual incentive plan provides that the executive officers, similar to any employee, are eligible to receive a pro-rated payout from the annual incentive plan based on the number of months the executive was employed during the applicable year. |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 2  | Mr. Jepperson’s RSUs were amended to provide for full vesting of the RSUs on the date of his retirement.  Mr. Bradley’s RSUs were amended so that the RSUs will continue to vest following his retirement on the dates specified in the original award agreements, except that continued vesting only applies to a portion of the RSUs granted in 2015 (representing the portion of 2015 he was employed).  Mr. Livsey’s RSUs were amended to provide for full vesting of the RSUs on May 21, 2015, except that accelerated vested applied to only a |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 35 |   |

----

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 3  | Under the performance share award agreements, in the event of termination of employment due to retirement, a participant will receive a prorated portion of the performance shares that he would otherwise have received for the performance period based on the portion of the performance period worked; provided that the participant is employed for at least 12 months of the performance period unless otherwise approved by the MPC.  Payments are calculated and made at the end of the performance period at the same time that payments are made to other participants.  Amounts in the table reflect the value of (a) the number of performance shares actually earned for the 2013-2015 performance period; (b) the target number of pro-rated shares for the 2014-2016 performance period; and (3) the threshold number of pro-rated shares for the 2015-2017 performance period.   Amounts for the performance shares represent the value of Questar's stock as of December 31, 2015.   The amounts included do not reflect actual payouts for the 2014-2016 and 2015-2017 performance periods, which will be determined at the end of the applicable performance period, and may be higher or lower than amounts set forth in the table. |

|                                        |
|----------------------------------------|
|                                        |  |  |  |  |  |  |  |  |
| Name                                   | Termination Due to Retirement | Termination Due to Death or Disability |
| Non-Equity Incentive Plan Payments1($) | Performance Shares2($) | Total($) |  | Non-Equity Incentive Plan Payments1($) | Performance Shares2($) | Accelerated RSUs3($) | Total($) |
| Ronald W. Jibson                       | 849,750 | 1,033,398 | 1,883,148 | 849,750 | 1,033,398 | 1,233,649 | 3,116,797 |
| Kevin W. Hadlock                       |  |  | — |  | 235,100 | 177,036 | 319,589 | 731,725 |
| Craig C. Wagstaff                      | 291,857 | 184,541 | 476,398 | 291,857 | 184,541 | 335,426 | 811,824 |
| Micheal G. Dunn                        |  |  | — |  | 209,913 | 19,727 | 328,783 | 558,423 |

|        |
|--------|
|        |
|   |

|         |                                                                                                                                                                                                                                                                                                   |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1  | The Non-Equity Incentive Plan values for Messrs. Jibson and Wagstaff are the same as those shown in the Summary Compensation Table.  Messrs. Hadlock and Dunn do not have the requisite 10 years of service to receive payments under AMIP or performance shares due to “retirement.” |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 2  | Performance Shares values represent the number of performance shares earned for the 2013-2015 performance period; target number of pro-rated shares for the 2014-2016 performance period; and the threshold amount of pro-rated shares for the 2015-2017 performance period. The prorated amount is determined based on the number of months of the performance period the executive was employed. Executives do not receive pro-rated amounts unless they have been employed for at least 12 months of the performance period, unless otherwise approved by the MPC. The pro-rated amounts do not reflect actual payouts which would be determined at the end of the performance period. Amounts for the performance shares represent the value of Questar's stock as of December 31, 2015.   Messrs. Hadlock and Dunn are not eligible for retirement benefits under the performance shares. |

|         |                                                                                                      |
|---------|------------------------------------------------------------------------------------------------------|
| 3  | Reflects the acceleration of unvested RSUs multiplied by Questar's stock price on December 31, 2015. |

|         |                                                                                                                                                                                                                                                  |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 4  | The amount reported under the Non-Equity Incentive Plan Payments for Mr. Wagstaff includes amounts deferred under the Deferred Compensation Wrap Plan.  The deferred amount will be paid following termination pursuant to prior plan elections. |

|         |                                                                                                                   |
|---------|-------------------------------------------------------------------------------------------------------------------|
| • | a cash payment equal to three times the participant's annual base salary and the target annual incentive payment; |

|         |                                                                               |
|---------|-------------------------------------------------------------------------------|
| • | a cash payment of the prorated target amount under the annual incentive plan; |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 36 |   |

----

|         |                                                                                                                                                                                                                                        |
|---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | a cash payment representing the difference between the net present value of the Pension Plan and SERP benefits calculated at termination (retirement benefit) and the retirement benefit with two added years of credited service; and |

|         |                                                                                                                                                                                    |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | continued medical and dental insurance coverage, basic and supplemental life insurance, accidental death or dismemberment and disability coverage for 24 months after termination. |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                            |
|---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | any individual, entity or group (within the meaning of Section 13(d)(3) or 14(d)(2) of the Exchange Act other than a trustee or other fiduciary holding securities under an employee benefit plan of the Company, is or becomes the beneficial owner (as such term is used in Rule 13d-3 under the Exchange Act) of securities of the Company representing 25 percent or more of the combined voting power of the Company; |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | the following individuals cease for any reason to constitute a majority of the number of directors then serving: individuals who, as of October 26, 2010, constitute the Company’s Board of Directors and any new director (other than a director whose initial assumption of office is in connection with an actual or threatened election contest, including but not limited to a consent solicitation, relating to the election of directors of the Company) whose appointment or election by the Board or nomination for election by the Company’s shareholders was approved or recommended by a vote of at least two-thirds of the directors then still in office who either were directors on October 26, 2010, or whose appointment, election or nomination for election was previously so approved or recommended; |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | the consummation of a merger or consolidation of the Company or any direct or indirect subsidiary of the Company with any corporation, other than a merger or consolidation that would result in the voting securities of the Company outstanding immediately prior to such merger or consolidation continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity or any parent thereof) at least 60 percent of the combined voting power of the securities of the Company or such surviving entity or its parent outstanding immediately after such merger or consolidation, or a merger or consolidation effected to implement a recapitalization of the Company (or similar transaction) in which no person is or becomes the beneficial owner, directly or indirectly, of securities of the Company representing 25 percent or more of the combined voting power of the Company’s then outstanding securities; or |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | the Company’s shareholders approve a plan of complete liquidation or dissolution of the Company or there is consummated an agreement for the sale or disposition by the Company of all or substantially all of the Company’s assets, other than a sale or disposition by the Company of all or substantially all of the Company’s assets to an entity, at least 60 percent of the combined voting power of the voting securities of which are owned by the shareholders of the Company in substantially the same proportions as their ownership of the Company immediately prior to such sale. |

|                   |
|-------------------|
|                   |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|              | Severance (3 X (base + annual incentive)) | Prorated annual incentive payment | RSU payment1,3 | Performance share payment2,3 | Enhanced retirement payment | Welfare benefit payment | Aggregate payments4 |
| Ronald W. Jibson  | 4,950,000 |  | 825,000 |  | 1,233,649 |  | 699,683 |  | 280,515 |  | 57,484 |  | 8,046,331 |  |
| Kevin W. Hadlock  | 1,880,802 |  | 235,100 |  | 319,589 |  | 126,834 |  | — |  | 41,637 |  | 2,603,962 |  |
| Craig C. Wagstaff | 1,860,699 |  | 244,334 |  | 335,426 |  | 131,958 |  | 75,403 |  | 47,812 |  | 2,695,632 |  |
| Micheal G. Dunn   | 2,029,500 |  | 266,500 |  | 328,783 |  | — |  | — |  | 32,965 |  | 2,657,748 |  |

|        |
|--------|
|        |
|   |

|         |                                                                                                                                                                                                                                                                                                                         |
|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1  | These are the same accelerated equity amounts disclosed on the Termination Due to Death or Disability table above.  RSUs granted prior to 2015 are included in these amounts and have a "single trigger" under which vesting would occur upon a change in control even if the executive's employment did not terminate. |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 37 |   |

----

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 2  | Upon a change in control, a participant becomes fully vested in the shares earned and the outstanding performance period(s) end on the change-in-control date. The number of performance shares earned on that date is determined using the metrics outlined in the award agreement(s) applied to the shortened performance period(s). The disclosed amount reflects actual payout (32 percent of target) for the 2013-2015 performance period; 49 percent of target for the 2014-2016 performance period; and 0 percent of target for the 2015-2017 performance period. |

|         |                                                                       |
|---------|-----------------------------------------------------------------------|
| 3  | Share values are based on Questar's stock price on December 31, 2015. |

|         |                                                                                                     |
|---------|-----------------------------------------------------------------------------------------------------|
| 4  | Amounts are subject to reduction if the participant would be better off on a "net-after-tax basis." |

|         |                                                                                                                                                                                                                                                                                                                           |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | each restricted stock unit award of the Company granted under the Company’s equity incentive plans will become vested and will be canceled at the effective time in exchange for a cash payment equal to the number of shares of Company common stock subject to such award multiplied by the merger consideration; |

|         |                                                                                                                                                                                                                               |
|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | each restricted share of the Company granted under the Company’s equity incentive plans will become vested and will be canceled at the effective time in exchange for a cash payment equal to the merger consideration; |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | each performance share award of the Company granted under the Company’s equity incentive plans (including any performance share award with respect to which the applicable performance period has ended, but which performance share award has not been settled) will become vested and will be canceled at the effective time in exchange for a cash payment equal to the number of shares of Company common stock subject to such award (based on the greater of the target number of shares of Company common stock subject to such performance share award or the actual number of shares of Company common stock issuable with respect to such performance share award based on actual performance) multiplied by the merger consideration; |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | if any performance share award that is outstanding and unvested as of the execution of the merger agreement becomes vested and settled prior to the effective time then, immediately prior to the effective time, the holder of the award will be issued a number of shares of Company common stock, if any, equal to the excess of (i) the number of shares of Company common stock that would have vested and been settled if the applicable performance goals or targets had been achieved at the target level, over (ii) the actual number of shares of Company common stock that vested and were settled in respect of such performance share award; |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                               |
|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | each stock option of the Company granted under the Company’s equity incentive plans will become vested and will be canceled at the effective time for a cash payment equal to (i) the excess, if any, of the merger consideration over the exercise price per share of Company common stock subject to such stock option, multiplied by (ii) the number of shares of Company common stock subject to such stock option; |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | each other right of any kind, contingent or accrued, to acquire or receive Company common stock or benefits measured by the value of Company common stock and each award of any kind consisting of shares of Company common stock (other than restricted stock units, restricted shares, performance share awards and stock options that may be held, awarded, outstanding, payable or reserved for issuance under the Company's equity incentive plans and any other Company employee benefit plans or arrangements (collective, the "Company Award") will become vested and will be converted at the effective time into an obligation to pay, at the time specified in the Company’s applicable equity incentive plan or other employee benefit plan or arrangement, an amount in cash equal to the number of shares of Company common stock subject to such Company Award immediately prior to the effective time multiplied by the merger consideration (with amounts in respect of Company Awards payable or distributable in accordance with the terms of the agreement, plan or arrangement relating to the Company Award (or, if earlier, on the death of the executive officer holding such Company Award)) and, prior to the time of distribution, the amount will be permitted to be deemed invested in a permitted investment option under the applicable agreement, plan or arrangement; |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | executive officers will receive, to the extent the effective time occurs during 2016 (or after 2016, but prior to payment of cash bonuses related to 2016), cash bonuses under the Company’s annual cash incentive plans, which we refer to as the “Incentive Plans,” (based on the greater of target performance or actual performance) and, to the extent the effective time occurs during 2017, prorated cash bonuses under the Incentive Plans at the effective time (based on target performance); |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 38 |   |

----

|         |                                                                                                                                                                                                                                                                                                                                              |
|---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | executive officers will be eligible to receive certain severance payments and benefits under the Company’s Executive Severance Compensation Plan, which we refer to as the “Severance Plan,” upon certain types of terminations of employment that occur at any time prior to the third anniversary of the effective time; |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | account balances under the Company’s Deferred Compensation Wrap Plan (which include Company Awards) will be subject to accelerated distribution at the effective time and account balances under the Company’s Supplemental Executive Retirement Plan, which we refer to as the “SERP,” will be subject to accelerated vesting at the effective time, as well as distribution upon a subsequent separation from service (as defined in the SERP) within 24 months after the effective time; and |

|         |                                                                                                                                                                                                                |
|---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • | account balances (which include Company Awards) and deferred RSUs under the Company’s director deferred compensation plan will be subject to accelerated vesting and distribution at the effective time. |

|                                                                                    |
|------------------------------------------------------------------------------------|
|                                                                                    |  |  |  |  |  |  |  |
| Name                                                                               | Numberof Shares Owned1,2 |  | Right to Acquire3 |  | Total Shares Beneficially Owned4 |  |
| Teresa Beck                                                                        | 19,927 |  |  |  | 19,927 |  |
| R. Allan Bradley5                                                                  | 23,584 |  | 47,062 |  | 70,646 |  |
| Laurence M. Downes                                                                 | 14,065 |  |  |  | 14,065 |  |
| Micheal G. Dunn                                                                    | 3,888 |  |   | 3,888 |  |
| Kevin W. Hadlock                                                                   | 28,902 |  |  |  | 28,902 |  |
| Christopher A. Helms                                                               | 8,838 |  |  |  | 8,838 |  |
| Thomas C. Jepperson5                                                               | 10,132 |  |  |  | 10,132 |  |
| Ronald W. Jibson6                                                                  | 214,961 |  |  |  | 214,961 |  |
| James R. Livsey5                                                                   | 2,817 |  |   | 2,817 |  |
| James T. McManus, II                                                               | 1,764 |  |  |  | 1,764 |  |
| Rebecca Ranich                                                                     | 1,882 |  |  |  | 1,882 |  |
| Harris H. Simmons                                                                  | 128,380 |  |  |  | 128,380 |  |
| Craig Wagstaff                                                                     | 56,752 |  |   | 56,752 |  |
| Bruce A. Williamson                                                                | 28,000 |  |  |  | 28,000 |  |
| All directors and executive officers (19 individuals including those listed above) | 696,226 |  | 47,062 |  | 743,288 |  |

|        |
|--------|
|        |
|   |

|         |                                                                                                                                                                                                                                                                                       |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1  | Questar's executive officers have shares of Company stock held for their accounts in the Questar Corporation 401(k) Retirement Income Plan, the Company's defined-contribution retirement plan, as follows: Mr. Dunn 3,888; Mr. Jibson 43,609; Mr. Livsey 6; and Mr. Wagstaff 20,662. |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 39 |   |

----

|                                      |
|--------------------------------------|
|                                      |  |  |  |  |  |  |
| Name                                 | Unvested RSUs |  | Deferred RSUs |  | Phantom Shares |  |
| Teresa Beck                          |  |  | 12,834 |  | 134,151 |  |
| Laurence M. Downes                   |  |  | 12,834 |  | 25,568 |  |
| Micheal G. Dunn                      | 32,911 |  |   | 132 |  |
| Kevin W. Hadlock                     | 24,557 |  |  |  | 11,961 |  |
| Christopher A. Helms                 | 8,106 |  |  |  |  |  |
| Thomas C. Jepperson                  |  |  |  |  | 77,382 |  |
| Ronald W. Jibson                     | 93,790 |  |  |  | 52,188 |  |
| James T. McManus, II                 | 8,106 |  |  |  |  |  |
| Rebecca Ranich                       |  |  | 12,834 |  | 3,756 |  |
| Harris H. Simmons                    |  |  | 12,834 |  | 321,914 |  |
| Craig Wagstaff                       | 26,238 |  |   | 17,433 |  |
| Bruce A. Williamson                  |  |  | 12,834 |  | 113,982 |  |
| All directors and executive officers | 292,120 |  | 64,169 |  | 791,178 |  |

|         |                                                                                                        |
|---------|--------------------------------------------------------------------------------------------------------|
| 3  | Shares that can be acquired by exercising stock options on or within 60 days after March 1, 2016. |

|         |                                                                                                                                                                                                                                                                                                                                                                                                               |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 4  | No individual director or executive officer beneficially owned more than one percent of the shares outstanding as of March 1, 2016. The total shares beneficially owned by all directors and executive officers as a group equals 0.42 percent of the outstanding shares. The beneficial ownership percentage is calculated according to Rule 13d-3(d)(1) under the Securities Exchange Act of 1934. |

|         |                                                                                                                                               |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------|
| 5  | Mr. Jepperson retired from the Company effective January 1, 2016; Messrs. Bradley and Livsey retired from the Company effective June 1, 2015. |

|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 6  | Includes 37,145 shares held indirectly by Mr. Jibson in a family trust. Mr. Jibson also is the Chairman of the Board of Trustees of the Questar Corporation Education Foundation, the Questar Corporation Arts Foundation, and the Questar Corporation Native American Scholarship Foundation, three nonprofit corporations that own a total of 144,255 shares as of March 1, 2016. As Chairman of these foundations, Mr. Jibson has voting power for these shares, but disclaims any beneficial ownership. These shares are not included in the total opposite his name. |

|                                                                                              |
|----------------------------------------------------------------------------------------------|
|                                                                                              |  |  |  |  |  |
| Name and Address ofBeneficial Owner                                                          | Shares and Nature of Beneficial Ownership |  | Percent of Class |  |
| JPMorgan Chase & Co.1270 Park Ave.New York, NY 10017                                     | 17,410,745 |  | 9.90 | % |
| State Street Corporation2One Lincoln St.Boston, MA 02111                                     | 16,340,085 |  | 9.40 | % |
| BlackRock Inc.355 East 52nd StreetNew York, NY 10022                                         | 16,324,158 |  | 9.30 | % |
| Parnassus Investments4    1 Market Street,  #1600San Francisco, CA 94105 | 13,700,699 |  | 7.83 | % |
| Vanguard Group Inc.5    100 Vanguard Blvd.Malvern, PA 19355              | 12,659,054 |  | 7.24 | % |

|        |
|--------|
|        |
|   |

|         |                                                                                                                                                                                                                                                                                                       |
|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1  | As reported on Schedule 13G/A filed with the SEC on January 21, 2016. The filing indicates that JPMorgan Chase & Co. held sole voting power of 16,551,209 shares, shared voting power of 4,749 shares, sole dispositive power of 17,398,260 shares and shared dispositive power of 12,485 shares. |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 40 |   |

----

|         |                                                                                                                                                                                                               |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 2  | As reported on Schedule 13G/A filed with the SEC on February 12, 2016. The filing indicates that State Street Corporation held shared voting power and shared dispositive power of all the referenced shares. |

|         |                                                                                                                                                                                                                     |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 3  | As reported on Schedule 13G/A filed with the SEC on January 27, 2016. The filing indicates that BlackRock Inc. held sole voting power of 15,136,471 shares and sole dispositive power of all the referenced shares. |

|         |                                                                                                                                                                                                           |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 4  | As reported on Schedule 13G/A filed with the SEC on February 12, 2016. The filing indicates that Parnassus Investments held sole voting power and sole dispositive power of all of the referenced shares. |

|         |                                                                                                                                                                                                                                                                                                                     |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 6  | As reported on Schedule 13G/A filed with the SEC on February 10, 2016 The filing indicates that of the referenced shares, Vanguard Group Inc. held sole voting power of 139,733 shares, shared voting power of 8,800 shares and dispositive power of 123,533 shares and shared dispositive power of 102,233 shares. |

|                                                            |
|------------------------------------------------------------|
|                                                            |  |  |  |  |  |  |
| Plan Category                                              | Number of securities to be issued upon exercise of outstanding options, warrants and rights(a) |  | Weighted-average exercise price of outstanding options, warrants and rights(b) |  | Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))(c) |  |
| Equity compensation plans approved by security holders     | 321,488 |  | $12.95 | 5,940,708 |  |
| Equity compensation plans not approved by security holders | — |  | — |  | — |  |
| Total                                                      | 321,488 |  | $12.95 | 5,940,708 |  |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 41 |   |

----

|                    |
|--------------------|
|                    |  |  |
|               | 20151 | 20142 |
| Audit Fees         | $1,739,000 | $1,590,352 |
| Audit-Related Fees | $0 | $9,995 |
| Tax Fees           | $0 | $0 |
| All Other Fees     | $124,442 | $0 |
| Total              | $1,863,442 | $1,600,347 |

|        |
|--------|
|        |
|   |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 42 |   |

----

|        |
|--------|
|        |  |
|   | QUESTAR CORPORATIONQUESTAR GAS COMPANYQUESTAR PIPELINE COMPANY(Registrants) |
|   |   |
| By:    | /s/ Ronald W. Jibson |
|   | Ronald W. Jibson,Chairman, President and Chief Executive Officer(Principal Executive Officer)Questar Chairman of the Board, Questar Gas and Questar Pipeline |
|   |   |
| By:    | /s/ Micheal G. Dunn |
|   | Micheal G. DunnPresident and Director(Principal Executive Officer)Questar Pipeline |
|   |   |
| By:    | /s/ Kevin W. Hadlock |
|   | Kevin W. HadlockExecutive Vice President and Chief Financial Officer(Principal Financial and Accounting Officer)Questar, Questar Gas and Questar PipelineDirector, Questar Gas and Questar Pipeline |
|   |   |
| By:    | /s/ Craig C. Wagstaff |
|   | Craig C. WagstaffPresident and Director(Principal Executive Officer)Questar Gas |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 43 |   |

----

|                       |
|-----------------------|
|                       |  |
| *Ronald W. Jibson     | Chairman, President and Chief Executive Officer Director |
| *Teresa Beck          | Director |
| *Laurence M. Downes   | Director |
| *Christopher A. Helms | Director |
| *James T. McManus II  | Director |
| *Rebecca Ranich       | Director |
| *Harris H. Simmons    | Director |
| *Bruce A. Williamson  | Director |
|                  |   |
| April 28, 2016        | */s/ Kevin W. Hadlock |
|                  | Kevin W. Hadlock, Attorney in Fact |

|                                         |
|-----------------------------------------|
|                                         |  |
| Exhibit No.                             | Description |
|                                    |   |
| EXHIBIT 31 - SECTION 302 CERTIFICATIONS |
|                                    |   |
| Questar Corporation                     |
|                                    |   |
| 31.1                                    | Questar Chief Executive Officer Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. |
|                                    |   |
| 31.2                                    | Questar Chief Financial Officer Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. |
|                                    |   |
| Questar Gas Company                     |
|                                    |   |
| 31.3                                    | Questar Gas Chief Executive Officer Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. |
|                                    |   |
| 31.4                                    | Questar Gas Chief Financial Officer Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. |
|                                    |   |
| Questar Pipeline Company                |
|                                    |   |
| 31.5                                    | Questar Pipeline Chief Executive Officer Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. |
|                                    |   |
| 31.6                                    | Questar Pipeline Chief Financial Officer Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. |
|                                    |   |

|                          |
|--------------------------|
|                          |  |  |
| Questar 2015 Form 10-K/A | 44 |   |