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Corporate Name Change & Merger Index

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Company Name
(OLD NAME)

Changed or Merged To
(NEW NAME)

Date of
BLM WY
Decision or
Cover Memo

BLM State
Office that
Issued
Decision

Wainoco, Incorporated

Wainoco Oil & Gas Company 

    Amended Decision-Additional Lease

07/26/1977
03/01/1977
03/12/1979

CO
WY
WY

Walter Duncan Oil LP  Walter Duncan Oil LLC

08/20/2014
Pending

NM
WY

Ware, Herbert (Herb) E., Jr.
Estate of Herbert E Ware Jr, Herbert E. Ware III & Brett Smith co-executors of the estate
04/18/2007
UT

Warren Energy

Dynergy, Inc

04/29/2003WY

Warren Ene Res LP

Dynergy Ene Res LP
    (Amended Decision)

07/21/1989
04/24/2003
WY
WY

Wascana Pipeline Inc

Texaco Pipeline Inc

12/27/2002WY

Washington Ene Expl Inc

Cabot O&G Prod Corp

10/12/1994WY

Washington Ene Oil Inc

Washington Ene Expl Inc

10/12/1994WY

Washington Ene Res LP

COG Acquisition Company

10/12/1994WY

WBI Production Inc

Fidelity Expl & Prod Co

05/31/2001CO

W.B. Osborn Jr. Trust 

Diana T. Morehouse, R. Foard Townsend III & W.B. Osorn III, beneficiaries of the now dissolved W. B. Osborn, Jr. Trust

12/23/2005WY
W. D. Anderson & Sons  The Heirs of Ava A., Warren D. Paul D., Payton V., & Evelyn Anderson: Karen Sue Anderson, Kenneth D. Anderson, Janet Anderson Carrell Loeffler, Gary Anderson Fell & Nancy Anderson Phariss Olson as successors-in-interest.01/24/2014WY

Weaver, Wayne Kerley

Estate of Kerley Wayne Weaver,
Alice Weaver, sole beneficiary

11/01/2002

WY

Weaver, Myron BMyron B. Weaver & Joan D. Weaver Revocable Family Trust

07/28/2014

WY

Weber Oil Company

Equity Oil Company

01/21/1958CO

Wedco Resources Corp

Oxford Consolidated Inc

10/18/1993WY
Weed Oil & Gas CompanyWeed Oil & Gas Company, L.C.02/04/2009WY

Wellfleet Drilling, LLC

CDX Gas, LLC

07/27/2006

WY

Wells Fargo Bank of San Francisco

Wells Fargo Bank of South Dakota

11/25/2005WY

Wesco Pipeline Company

Texaco Pipeline Inc

12/27/2002WY
West Gas II IncEnergy Equity Co03/24/2003MT

Westburne Expl Inc

DKM Resources Inc

08/15/1990WY
Westech Energy CorporationEnergy Corporation of America03/11/2010
03/18/2010
MT
WY

Western Associated Development Corp

Beacon Holding Company

06/07/1984WY

Western Gas Processors LP

Western Gas Resources Inc

05/24/2002WY

Western Interior Resources

Western Interior Corporation

12/11/1992WY
Western Natural Gas Capital Associates, Inc.Western Natural Gas Capital Associates, LLC03/15/2011WY

Western Production Co

Black Hills Expl & Prod

03/03/1999WY

Western Oil Corp

KN Production Co

10/10/1991WY

West Gas II Inc

Energy Equity Co

03/24/2003MT

Westland Exploration Company

Kaiser-Francis Oil Company

01/29/2003NM

Westminster Petroleum Inc

Oxy Lost Hills Inc

08/28/2002CA

Westport Acquisition LLC

Westport Oil & Gas Company Inc
    Amended Decision

01/31/1997
05/25/2005
WY
WY

Westport Oil & Gas Company, LP

Kerr-McGee Oil & Gas Onshore LP 
    (Oil and Gas Leases Only )
 Kerr-McGee Oil & Gas Onshore LP
    (WY Rights-of-Way Grants Only)

06/22/2006

04/03/2006

CO

WY

Westport Oil & Gas Company Inc

Westport Oil & Gas Company LP

02/25/2002CO
WG Operating, Inc.Halcon Operating Company, Inc. 
    Amended Decision
08/29/2012
09/28/2012
WY

WGR Inc

Western Gas Res Inc

02/22/1993WY

Wichita Securities Corp

Wichita River Oil Corp 
    Amended Decision-Additional Leases 
    Amended Decision-Additional Leases

05/13/1988
10/13/1988
11/04/1988

WY
WY
WY

White Eagle Oil Co

Helmerich & Payne Inc

06/14/1962WY

Whiting Petroleum Corp

Whiting Oil & Gas Corp

12/19/2003
02/25/2004

NM
WY

Whitney George W

George W Whitney Trust

01/12/1993WY

Wicklund, Edward A

Edward A Wicklund Trust, Joyce J Wicklund & Reid Lindquist, co-trustees

10/18/2001WY

Wilbanks Exploration, Inc.

Wilbanks Reserve Corp

02/25/2004WY

WildHorse Energy Partners LLC

EnCana Oil & Gas (USA) Inc

03/22/2005
04/22/2005

CO
WY

Wildmere Resources Inc

Tika Energy Inc

09/10/2004WY

Willard Pease O&G Co

Pease Oil & Gas Co

03/23/1994WY
William C. Helis Company, L.L.C., The Helis Oil & Gas Company, L.L.C.01/13/2004
05/19/2008
MT
WY

Williams-Cody Inc

Cody Energy Inc

07/07/1997WY

Williams Gas Pipelines Central

Southern Star Central
    (rights-of-way only)

PendingWY

Williams Gas Processing Company & Williams Gas Processing-Wamsutter

Williams Field Services Company

01/27/2005WY

Williams Natural Gas

Williams Gas Pipelines Central
    (rights-of-way only)

PendingWY

Williams Production Co

Williams Production Co LLC

05/17/2001UT
Williams Production Company LLCWPX Energy San Juan LLC03/27/2012
04/12/2012
NM
WY
Williams Production Mid-Continent CompanyWPX Energy Mid-Continent Company03/27/2012 
04/12/2012 
NM
WY
Williams Production Rocky Mountain CompanyWPX Energy RM Company03/27/2012
04/12/2012
NM
WY
Williams Production RMT CompanyWilliams Production RMT Company LLC01/18/2011
02/04/2011
NM
WY
Williams Production RMT Company LLCWPX Energy Rocky Mountain LLC03/27/2012
04/12/2012
NM
WY
Williams Production Ryan Gulch LLCWPX Energy Ryan Gulch LLC  03/27/2012
04/12/2012
NM
WY

Willingham, Robert W.

Helen Kay Willingham, sole beneficiary of the Estate of Robert W. Willingham

12/26/2006WY
Williston Basin Interstate PipelineWBI Energy Transmission, Inc.

08/02/2012

08/22/2012

MT

WY

Willoco LLC

Helm Energy LLC

07/18/2000WY

Wilshire Oil Company

Wilshire Enterprises, Inc

09/17/2004WY
Winchester Production Company, LTDEXCO Operating Company, LP03/16/2011
04/01/2011
ES
WY

Wintershall Corp

BASF Corp

11/16/1989WY

Wintershall Oil & Gas Company

Fin-Oil Inc
    (Amended Decision)

06/23/1980
05/18/1984
WY
WY

Wintershall Oil & Gas Co

Wintershall Corp

05/01/1987

WY

Wintershall Petroleum Corp

Wintershall Corp

05/01/1987

WY

Wiser Oil Company, The Forest Oil Corporation 
    Amended Notice

01/26/2010
Pending

WY
WY

WOC Acqstn Co

Whiting Petro Corp

03/13/1997WY
Wold Oil Properties, Inc.  Wold Oil Properties, LLC07/11/2014WY

Wolfe (Wolf), Helene B aka Helene Bernardine Andrau Wolfe, Estate of

William Evert Andrau Trusts 1&2
Helene B Hewett/Barbara A Powell Trusts 1&2
Siegler Family Trusts 1&2
Correction in percentage

02/24/2004

03/22/2004

WY

WY

Wolf, Melvin

Melvin Wolf Estate
Elaine Wolf, Personal Representative
Amended Decision--53 Hyde Park
LLC, successor-in-interest

10/07/1999


10/26/1999

WY


WY

Wolverine Expl Co

Amerac Ene Corp

08/23/1995WY

Wolverine Exploration Company of Texas

Wolverine Exploration Company of DE
    (Secretary of State Certificate only)

07/10/1987WY

Woods Drilling Partnership No. A-5

Woods Petroleum Corp

04/10/1991

WY

Woods 1973 Drilling Program

Woods Petroleum Corp

04/10/1991

WY

Woods 1974 Drilling Program

Woods Petroleum Corp

04/10/1991

WY

Woods 1976-II Drilling Program

Woods Petroleum Corp

04/10/1991

WY

Woods 1977 Drilling Program

Woods Petroleum Corp

04/10/1991

WY

Woods 1980-II Drilling Program

Woods Petroleum Corp

04/10/1991

WY

Woods 1981-II Drilling Program

Woods Petroleum Corp

04/10/1991

WY

Woods 1983-IA Drilling Program

Woods Petroleum Corp

04/10/1991

WY

Woods 1984-IA Drilling Program

Woods Petroleum Corp

04/10/1991

WY

Woods 1984-IIA Drilling Program

Woods Petroleum Corp

04/10/1991

WY

Woods 1984-IIIA Drilling Program

Woods Petroleum Corp

04/10/1991

WY

Woods 1985-IA Balanced Drilling Program

Woods Petroleum Corp

04/10/1991

WY

Woods Petroleum Company

Argent Energy Inc

03/13/1991
03/22/1991
WY
WY
World Marketing, Inc.Royal Energy Resources, Inc.
    Amended Notice (Added Effective Date)
07/18/2008
07/18/2008
WY
WY

Worldwide Energy Corp

Triton Oil & Gas Corp

04/09/1989

WY

Worldwide One , Inc.

Worldwide Energy Corp 
    Amended Decision-Additional Lease

07/23/1984
02/25/1987

WY
WY

WPX Energy San Juan LLCWPX Energy Production LLC

03/27/2012 
04/12/2012 

NM
WY

WR Co

LR Company

04/23/1980WY

Wynn-Crosby 1994, LTD

Wynn-Crosby 1997, LTD

 01/04/2006

NM

Wynn-Crosby 1995, LTD

Wynn-Crosby 1997, LTD

 01/04/2006

NM

Wynn-Crosby 1996, LTD

Wynn-Crosby 1997, LTD

 01/04/2006

NM

Wynn-Crosby 1997, LTD

Petrohawk Properties, LP

01/04/2006
NM

Wynn-Crosby 1998, LTD

Wynn-Crosby 1997, LTD

 01/04/2006

NM

Wynn-Crosby 1999, LTD

Wynn-Crosby 1997, LTD

 01/04/2006

NM

Wynn-Crosby 2000, LTD

Wynn-Crosby 1997, LTD

 01/04/2006

NM

Wynn-Crosby 2002, LTD

Wynn-Crosby 1997, LTD

 01/04/2006

NM

Wynn-Crosby Energy, Inc.

Petrohawk Operating Company

 01/04/2006

NM

Wyoming Minerals LLC

Wyoming Minerals Ltd

03/27/2006WY

Wysak Petroleum, Inc.

Wild Brush Energy, Inc.

07/17/2006

WY


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