- Garland Minerals Corp
- Gas Continual
- Gas Continual
- Gasoco Inc
- Gasoco Inc
- Gemini Explorations
- Gemini Explorations Inc
- Gene Powell Investments Inc
- Gene Powell Investments Inc
- General Operating Co
- General Operating Co
- Geo-Graphic Production Inc
- Geo-Graphic Production Inc
- George F Johnston Jr
- George M Campbell
- George M Campbell
- George M Campbell
- George M Campbell
- Gerald Lyda X-Bar Oil
- Gerald W Green
- Gerard Offices
- GGG Oil Co
- Gieb Corp
- Ginger Petroleum Co Inc
- Glacier Petroleum Co
- Golden West Oil Co
- Goldston Oil Corp
- Goldston Oil Corp
- Gore Oil Co
- Graham Oil Co
- Grand Banks Energy Co
- Grand Mesa Operating Co
- Gray Operating Co
- Greco Operating
- Greco Operating
- Greystar Corp Oil Oper
- Griffin Resources LLC
- Guadalupe Shadows LLC
- Gulfstar Properties Inc
- Gulfstar Properties Inc
- Gulley & Hughey
- H A KNOX Oil Co
- H A KNOX Oil Co
- H C Robinson Jr Estate
- H C Robinson Jr Estate
- H E Dishman
- H H Phillips Jr
- H H Phillips Jr
- H L Brinson
- H L Brown
- H L Brown & French Pipe Yard
- H L Mc Cracken Co
- H-M Oil Co
- H-M Oil Co
- H-M Resource Management
- Haas Oil Co Inc
- Halcyon Natural Gas LLC
- Hamco
- Hammack Oil Co
- Hanagan Petroleum Corp
- Hancock & Assoc Oil Investment
- Hanson Production Co
- Hanson Production Co
- Harding Co
- Harman Operating Co
- Harper Hefte Inc
- Harrell Operating Inc
- Harrell Operating Inc
- Harry J Owens
- Hartman Oil Co
- Hawthorne Oil Co
- Hayes Land Corp
- Haylan Oil Co
- Heart Land Drilling
- Heartland Drilling
- Henry Petroleum Corp
- Herd Partners LTD
- Herd Producing Co
- Hesse's Petroleum
- Hightower Oil & Gas Co
- Hilliard Petroleum
- Hilory G Bedford
- HMH Operators
- Hodgden Operating Co
- Hodges Oil Co
- HOFCO Inc
- HOFCO Inc
- Hoffman Oil Co
- Hollimon Oil Corp
- Hollimon Oil Corp
- Hubbard Petroleum
- Hufo Oils
- Humphrey-Bashford Oil Inc
- Humphrey-Bashford Oil Inc
- Hurd Enterprises LTD
- Hurd Enterprises LTD
- Ice Brothers Inc
- Imperial Gas Resources LLC
- Imperial Operating Co
- Independent Transportation
- Independent Transportation
- Irish Oil & Gas Co
- Irish Oil & Gas Co
- Irish Oil & Gas Co
- J & J Resources LLC
- J & W Oil Co-WF
- J B Herrmann Oil & Gas
- J B Herrmann Oil & Gas
- J Charles Hollimon
- J D Ward Oil Co
- J F Hood Oil Properties
- J L Greene Estate
- J-O'b Operating Co
- J-W Operating Co
- J-W Operating Co
- Jack Grace Production Co
- Jack Grace Production Co
- Jack Huff
- Jack L Phillips Oil Co
- Jack L Phillips Oil Co
- Jackson Oil Co Care
- Jackson Oil Co Care
- Jaco Oil Co
- James Deryl Oil Operator
- James Deryl Oil Operator
- James E Harrell
- James E Harrell
- James E Logan Oil Corp
- James H Steedman Estate
- James R Dougherty Properties
- James T Bond
- James T Bond
- James W Parham
- James W Porter Special
- Jamex Inc
- Jane Rhodes Beste
- Jay E Floyd Oil & Gas
- Jenex Acquisition Co
- Jenex Acquisition Co
- Jennings Exploration Co
- JGO Donohoe Inc
- Jim Mc Hargue
- Jimmie B Myers
- Jimmy Jack Biffle Water Well
- JLA Resources Co
- Jm Cox Resources LP
- JO Jon Petroleum Co
- JOB Operating Co
- Joe C Richardson Jr
- Joe C Richardson Jr
- John H Hendrix Corp
- John H Young Inc
- John H Young Inc
- John L Cox Pipe Yard
- John R Thompson Oil Operator
- John R Thompson Oil Operator
- Johnson & Ernst Operating Co
- Johnson & Ernst Operating Co
- Johnson & Lindley Inc
- Johnson Oil Co
- Jojon Petroleum Co
- Joyce Oil & Gas Inc
- Joyce Oil & Gas Inc
- Julian Ard Co
- Julian Evans
- Julian Evans
- Juna Operating Co
- JVA Operating Co
- K 2 Petroleum
- K 2 Petroleum
- K L Krottinger
- K L Krottinger
- K M Jastrow
- K M Skaar Oil & Gas Inc
- K W Well Svc
- K W Well Svc
- Kahn Investment
- Karper Co
- Karper Co
- Kasle Energy Inc
- KATO Operating Co
- Katsco Energy
- KATZ Oil Co
- KATZ Oil Co
- Kcm Management Inc
- Kebo Oil & Gas Inc
- Kelcas Well Svc LTD
- Kelly H Baxter
- Kelly H Baxter
- Ken & Geri Inc
- Kenneth G Mc Cann Jr
- Kenneth G Mc Cann Jr
- Kenworthy Oil
- Kenworthy Oil
- KERR Mc Gee
- Keystone Operating Co
- Kilmarnock Oil Co
- Kilmarnock Oil Co
- Kimble Oil Co
- Kindred Petroleum Co
- King Petroleum
- Kirkpatrick Oil Co
- Kirrie Oil Co
- Knight Oils
- KNOX Industries Inc
- Koby Oil Co
- Kopco Inc
- Korea Petroleum Development
- Korea Petroleum Development
- L & G Oil Co
- L & G Oil Co
- L Log Exploration Co
- L R Hagy Estate
- L R Hagy Estate
- L W Sewell
- Ladder Energy Co
- Lakewood Energy Inc
- Lamay Corp
- Lambert Co
- Largo Oil Co
- Largo Oil Co
- Larry Tate Co
- Larry Tate Co
- LCS Productions
- LCS Productions
- Lea Corp
- Lea Corp
- Leasehold Management Corp
- Leasehold Management Corp
- Lehnertz Faulkner Inc
- Lenoir M Josey Inc
- Lenoir M Josey Inc
- Lewis B Burleson Inc
- Lewis B Burleson Inc
- Liberty Co
- Liberty Co
- Liberty Resource Inc
- Lightning Oil Co
- Lightning Oil Co
- Lightning Oil Co
- Lindsay Oil Operations
- Lindsay Oil Operations
- Live Oak Petroleum Inc
- Loan Star Mortgage Solutions
- Loan Star Mortgage Solutions
- Lomax Operating Co Inc
- Lomax Operating Co Inc
- Long Trusts
- Lou Little Operating Co
- Lowrance Inc
- Luxe Energy Corp
- Lynx Operating Co
- Lyon Oil
- M & V Resources
- M D Abel Co
- M-B Oeprating Co Inc
- Mac Kellar Oil Co
- Machin & Assoc Inc
- Magnum Producing & Operating
- Mai Operations
- Mai Operations
- Main Operating Inc
- Main Operating Inc
- Manzano LLC
- Manziel Interests
- Maralex Resources Inc
- Marathon Oil Co
- Marcus Exploration Inc
- Mardis Co
- Marie Adams
- Marie Adams
- Marino Oil & Gas
- Marino Oil & Gas
- Marino Oil & Gas
- Marino Oil & Gas
- Mark Hannifin Oil & Gas
- Marlin Oil Corp
- Marquee Corp
- Martin Oil Co
- Marwell Petroleum
- Marymac Co LLC
- Matson Energy Co
- Maxwell Oil & Gas Corp
- Mayne & Mertz Inc
- Mayo Oil Co
- Mayo Oil Co
- Mc Clure Oil Co Inc
- Mc Donnold Co
- Mc Farland & Scobey Inc
- Mc Gowan Working Partners
- Mcalester Fuel Co
- Mcalester Fuel Co
- Mccombs Energy LLC
- Mccombs Energy LLC
- Melrose Energy Co
- Meredith Mallory Jr Investment
- Meredith Mallory Jr Investment
- Merit Energy Co
- Meyers-Lasher Inc
- Meyers-Lasher Inc