U.S. DEPARTMENT OF THE INTERIORBUREAU OF LAND MANAGEMENT
Wyoming
 
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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
AA Development Corporation

AA Energy Corp 
    Amended Decision-Additional Lease

02/11/1985
10/29/1985

WY
WY

AA Energy Corp

AMR Energy Corp
    Amended Decision-Additional Lease

02/11/1985
10/29/1985

WY
WY

Aberdeen American PetroAberdeen Petro (USA) Inc04/10/1990WY
Abraxas Operating, LLC Abraxax Petroleum Corporation05/14/2013
08/26/2013
CO
WY
Abraxas Production CoAbraxas Petroleum Corp11/30/1999WY
Ackerman, R.JAckerman, Phyllis L10/23/1991WY
Adobe Oil & Gas CorpAdobe Resources Corp
    (Amended Decision)
    (Amended Decision)
03/06/1986
05/09/1986
12/10/1986
WY
WY
WY
Adobe Petroleum CorpAdobe Resources Corp
    (Amended Decision)
05/15/1987
05/04/1995
WY
WY
Adobe Resources CorpSanta Fe Energy Resources Inc05/04/1995WY
Adolph Coors Brewing Company

Molson Coors Brewing Company

    (Wyoming Decision)
08/27/2007
12/19/2007
CO
WY
AEC Gathering Services (USA) IncEnCana Gathering Services (USA) Inc 05/23/2002MT
AEC Gulf of Mexico IncEnCana Gulf of Mexico Inc 05/23/2002MT
AEC International (USA) IncEnCana International (USA) Inc 05/23/2002MT
AEC Marketing (USA) IncEnCana Marketing (USA) Inc 05/23/2002MT
AEC Oil & Gas (USA) IncEnCana Oil & Gas (USA) Inc 05/23/2002MT
AEC Oil & Gas Co LtdEnCana Oil & Gas Co Ltd 05/23/2002MT
AEC Oil & Gas PartnershipEnCana Oil & Gas Partnership 05/23/2002MT
AEC Pipelines (USA) IncEnCana Pipelines (USA) Inc 05/23/2002MT
AEC Storage & Hub Services IncEnCana Gas Storage Inc 05/23/2002MT
AEC West LtdEncana Pipelines Ltd 05/23/2002MT
AEC Pipelines LtdEnCana Pipelines Ltd05/23/2002MT
Agate Petroleum, Inc. St Mary Land & Exploration Company12/28/2010
01/04/2011
MT
WY
AGM CorpDiamond Shamrock03/18/1987WY
Aguasal Holdings LLCHenry Petroleum LP03/17/2010
03/24/2010
NM
WY

Ahrens, Oma B

Oma B. Ahrens Estate to Bart Patrick Yates as successor-in-interest03/03/2006WY
AIRCO Delaware, Inc. AIRCO, Inc.06/06/2008
02/12/2014
CO
WY
AIRCO, Inc. The BOC Group, Inc.06/06/2008
02/12/2014
CO
WY
Airtouch Communications IncVodaphone Airtouch PLC02/24/2004WY
Airtouch Communications IncVodaphone America Asia Inc02/24/2004WY
AKI Oil and Gas CorporationC&K Petroleum Inc02/18/1981NM
Alberta Energy Co LtdPanCanadian Energy Corp05/23/2002MT
Alenco Oil & Gas ND IncAEC Oil & gas USA Inc11/16/2001WY
Alene Oil CoTenkay Resources, Inc.12/18/1989WY
Alliance Exploration & Prod CoAllco Exploration Company08/04/1982WY
Alpetco IncMcAlester Fuel Co04/29/1977
07/08/1977
MT
WY
Alta Energy CorpDevon Energy Oper Corp04/10/1995WY

Altex Resources Company

Altex Energy Corporation

    (NM Decision, oil & gas leases only)

    (WY cover memo., oil & gas leases only)


02/20/2008
03/10/2008


NM
WY

Amacan Resources CorpSpire International Corp01/02/1997MT
Ambrose Lee, Jr.Estate of Ambrose Lee, Jr., Austin R. Lee, Se. Executor07/11/2008WY
Amaricen General PartnershipAmaricen Holdings, L.P.10/12/2007WY
Amax Oil & Gas IncUnion Pacific O&G Co01/18/1995
03/30/1995
WY
NM
Amax Petroleum Corp

Nemidco, Inc.
Bond Decision—Rider Added

12/29/1994
01/12/1995

WY
WY

Amber American Resources IncAmerican Banner Res Inc06/18/1980WY
American Energies Corporation Trex AEC, LLC06/18/2013
08/26/2013
NM
WY
American Trading & Production CorporationTema Oil & Gas Company09/04/2012
11/16/2012
NM
WY
American Trading & Production Corporation  Tema Oil and Gas LLC09/24/2012
10/30/2012
NM
WY

Amcana Oil Corporation

I.C. Gas Amcana
Amended Decision-Additional Lease
12/12/1984
02/13/1985
WY
WY
Amco Oil CorporationAssociated Royalty Company08/16/1973WY

Amerac Energy Corporation

Southern Minerals Corporation

    MT Notice (Oil and Gas Leases Only)

    WY Cover Memo. (Oil & Gas Leases Only)

 
05/06/2008

 05/19/2008


MT
WY

Amerada Hess Corporation

Hess Corporation 
    (Oil & Gas Leases Only) 
    (Rights-of-Way Grants Only)

07/11/2006

Pending

MT

WY

Amerada Petroleum CorpAmerada Hess Corp10/20/1969WY
American Cometra, IncPearlstone Energy Partners LLC10/21/2005MT
American Exploration CoLouis Dreyfus Natural Gas Corp
    (Amended Decision)
    (Amended Decision)
    (Amended Decision)
07/29/1998
08/06/1998
01/10/2007
01/23/2007
WY
WY
MT
WY
American Energy CoMeahger O&G, Prop Inc03/14/1998WY
American Minerals Mgmt IncAmerican Res Mgmt Corp
    (Amended Decision)
    (CO State Office Decision)
03/10/1975
01/23/1976
04/04/1977
WY
WY
CO
American National Petroleum CompanyGoodrich Petroleum of LA11/04/1999WY
American Natural Gas Prod CoANR Production Co10/14/1980WY
American Oil & Gas, Inc. Hess Bakken Investments I Corporation07/13/2011
07/22/2011
MT
WY
American Petrofina Company of TexasFina Oil & Chemical Co06/24/1986
05/11/1987
10/11/1990
WY
WY
WY
American Petrofina IncFina Inc05/07/2002MT
American Petrofina Marketing IncAmerican Petrofina Company of Texas
    (Certificate Only)
06/28/1985WY
American Prod Ptnrshp Ltd-IIIAmerican Prod Ptnrship III-Ltd06/21/1991WY
American Prod Ptnshp Ltd IVAmerican Prod Pntnrshop-IV Ltd06/21/1994WY
American Quasar Petro Co of NMWolervine Expl Co of Delaware10/16/1987WY
Americomm Resources CorpEmpire Petro Corp10/25/2001WY
Amerox Acquisition Corp

Austral Oil Company 
    (Oil and Gas Leases Only)

01/10/2007
01/23/2007
MT
WY
Aminoil IncPhillips Oil Company06/04/1985WY
Aminoil Resources IncAminoil USA Inc02/15/1977WY
Aminoil USA IncAminoil Inc 
    (Amended Decision)
02/07/1984
08/22/1985
WY
WY
Amistad Land & Cattle Co., Inc.Spike Box Land & Cattle Company, Inc.08/05/2008
08/22/2008
NM
WY
Amoco Production CompanyBP America Production Co01/16/2002WY
AMR Energy CorpTOGA Petroleum Company08/27/1986WY
Anadarko E&P Company LPAnadarko E&P Company LLC
     Corrected Notice  
02/13/2013
02/25/2013
WY
WY
Anadarko LOGC Company LLC  Anadarko E&P Company LLC04/30/2013WY
Anadarko Titleholder 1, LLC   Anadarko E&P Onshore, LLCPendingWY
Anderman Oils LLCAnderman Oils Ltd
    (Amended Decision)
10/10/1997
07/02/1998
WY
WY
Anderman Oils Wyoming, Inc.Heritage Energy Resources, Inc10/21/2005WY
Anderman Operating CompanyAnderman/Smith Operating Co01/20/1988WY
Anderson, Ada A.  Estate of Ada A. Anderson01/13/2014WY
Anderson, Donald B. Jr.Anderson, Donald B. Jr., Estate of
Rebecca Jo Gregg Anderson, sole heir to the Estate
08/16/2013 WY
Anderson, Evelyn B.Estate of Evelyn B. Anderson (Wife to Payton V. Anderson, deceased)01/10/2014WY
Anderson, Georgia, Estate ofGeorgia F. Anderson Trust, James H. Anderson, trustee06/25/2003WY
Anderson, Paul D.Estate of Paul D. Anderson09/20/2012WY
Anderson, Payton V.Estate of Payton V. Anderson09/24/2012WY
Anderson, Warren D.Estate of Warren D. Anderson 01/14/2014WY
Andover Oil CompanySanta Fe Minerals Inc05/02/1995WY
ANR Production CompanyEP Production Merger Company, L.L.C. 08/21/2009WY
Ansbro Petroleum Company, LLC Anschutz Exploration Corporation 
    (CO Notice- Oil & Gas Leases Only)
Anschutz Exploration Corporation 
    (WY Cover Memo. Oil & Gas Leases Only)
05/28/2008

06/02/2008
CO

WY
Anschutz Corporation Inc, TheThe Anschutz Corporation12/12/1972WY
Anschutz Western Corp, et al (Anschutz Colorado Corp, Anschutz Gold Coast Corp, Anschutz Permian Corp, Anschutz Western Corp, Anschutz Williston Basin Corp, Anschutz Wyoming Corp)Anschutz Exploration Corp11/21/2002CO
AnSon Partners Limited PartnershipChesapeake Merger II Corp.08/22/2008 WY
AnSon Production CorporationChesapeake Merger II Corp.08/22/2008 WY
Antelope Coal Company

Antelope Coal LLC

    Oil & Gas Leases Only

Antelope Coal LLC
    Coal Leases only


12/23/2008

01/15/09

WY

WY
Antelope Gas Products CoAntelope Production Co09/26/1984WY
Antlers Enterprises IncSimba Energy Corp04/23/2001NM
Apache Energy IncApache Energy and Minerals Company04/14/1980WY
Apache Exploration CorporationApexco, Inc08/14/1973WY
APD CompanyAPD Energy Company, LP07/14/1988WY
Apexco, Inc.Natomas North America, Inc.03/23/1978WY
APX CorpAnadarko Petro Corp09/30/1992WY
APX Western CorpAnadarko Petro Corp09/30/1992WY
Aquarius Drilling CorporationAquarius II Incorporated06/10/1982WY
Aquitane Oil CorporationElf Aquitaine Inc
    Amended Decision-Added Lease
    Amended Decision-Added Lease
03/07/1978
04/03/1978
10/23/1979
WY
WY
WY
Arapaho Petro IncIntoil Inc04/22/1992WY
Arapaho Energy IncArapaho Petro Inc04/22/1992WY
Arch Mineral Corp.Arch Coal, Inc.08/13/2004WY
Arch of Wyoming, IncArch of Wyoming LLC09/10/1999WY
Arch Oil & Gas CompanyCoseka Res (USA) Ltd11/04/1988WY
Arch Petroleum, Inc.Pogo Petroleum Company

03/27/2006

WY
Argent Ene IncWoods Research & Development Corp04/16/1992WY
Arrow Oil & Gas, Inc.   Arrow Oil & Gas, LLC04/24/2012
11/02/2012
NM
WY
Ashland Exploration, Inc.Blazer Energy Corp.04/18/2011
04/21/2011
ES
WY
Ashland Oil & Refining CompanyAshland Oil Inc06/08/1970WY
Asterik IncMontex Exploration Co06/24/1986WY
Atlantic Oil Corporation

Stephens Energy Company LLC

05/21/2012

07/12/2012

CO

WY
Atlantic Refining CompanyAtlantic Richfield Company02/25/1987WY
Atlas Gas & Oil Company, LLC Chevron Michigan, LLC08/09/2011
08/17/2011
ES
WY
Aurora Energy, LtdAurora Oil & Gas Corporation04/23/2010
05/04/2010
ES
WY
Austral Oil CompanyAmerican Exploration Company
    (Oil and Gas Leases Only)
01/10/2007
01/23/2007
MT
WY
Avance Oil & Gas Company, Inc.Amax Petroleum Corp05/13/1982WY
Aviara Energy CorpHunt Petroleum (AEC) Inc08/26/2002CO
Axem-Blackbird LLCBlackbird LLC05/25/2005WY
Axem-Blubell LLCWestport Acquisition LLC05/25/2005WY
Axem-JCEC LLCWestport Acquisition LLC05/25/2005WY
Axem Energy CoWestport Oil & Gas Company Inc05/25/2005WY
Axem Energy LLCWestport Acquisition LLC05/25/2005WY
Axem Production LLCWestport Acquisition LLC05/25/2005WY
Axem Resources Inc

Westport Oil & Gas Company Inc

    Amended Decision

10/24/1997
11/21/1997
05/25/2005

CO
WY
WY

Aztec Energy CorpNoarko Resources Inc
    (Amended Decision-Additional Leases)
    (Amended Decision-Additional Leases)
12/29/1983
08/28/1984
04/15/1985
WY
WY
WY
Aztec Oil & Gas CoSouthland Royalty Company01/27/1978
02/01/1978
05/24/1978
CO
WY
NM
Aztec Resources CorporationWEPCO Energy Company05/01/1987WY

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Last updated: 04-23-2014