| Pennzenergy Expl & Prod L | 101665 | Houston | 0 | 0 |
| Pennzoil Company | 101666 | Houston | 3 | 1 |
| Pennzoil Company | 101667 | Neola | 0 | 0 |
| Pennzoil Company | 101668 | Vienna | 0 | 0 |
| Pennzoil Explor & Prod Co | 101669 | Houston | 23 | 3 |
| Penrose Production | 101670 | Ft Worth | 1 | 1 |
| Pepin Oil Company Inc | 101671 | Stillwater | 0 | 0 |
| Peppermill Oil Co Inc | 101672 | Denver | 0 | 0 |
| Perchetti Energy Holdings, LLC | 105586 | Lamoille | 0 | 0 |
| Percussion Petroleum Operating III, LLCActive | 105842 | Houston | 0 | 0 |
| Perfection Oil & Gas Co | 101673 | — | 3 | 1 |
| Performance Drl Management | 101674 | Littleton | 0 | 0 |
| Perkins, E R | 101675 | — | 1 | 1 |
| Permian Corp | 101676 | Houston | 0 | 0 |
| Perry, Hal & Quackenbush | 101677 | Duchesne | 0 | 0 |
| Peterson, L F | 101678 | Ft Worth | 0 | 0 |
| Peterson, Willa O | 101679 | Ft Worth | 0 | 0 |
| Petral Exploration LLC | 101680 | Denver | 10 | 1 |
| Petral Exploration LLC | 101681 | Denver | 0 | 0 |
| Petro Mex, LLCActive | 104917 | Farmington | 28 | 1 |
| Petro Minerals Explor Inc | 101682 | Lakewood | 1 | 1 |
| Petro Source | 101683 | Salt Lake City | 0 | 0 |
| Petro Source Partners LTD | 101684 | Houston | 0 | 0 |
| Petro Wells Inc | 101685 | — | 1 | 1 |
| Petro-Canada Resources (USA) Inc | 101686 | Denver | 25 | 3 |
| Petro-Hunt, LLC | 101687 | Dallas | 4 | 2 |
| Petro-Lewis Corp | 101688 | — | 2 | 1 |
| Petro-Quest Inc | 101689 | — | 1 | 1 |
| Petro-X Corporation | 101690 | Holladay | 7 | 1 |
| Petro-X Corporation | 101691 | Holladay | 0 | 0 |
| Petrodril Inc | 101692 | Farmington | 5 | 1 |
| Petrodyne/ResourceTech | 101693 | Denver | 2 | 1 |
| Petroglyph Energy Inc | 101694 | Roosevelt | 0 | 0 |
| Petroglyph Operating Co | 101695 | Boise | 0 | 0 |
| Petroglyph Operating Co | 101696 | Roosevelt | 88 | 1 |
| Petroglyph Operating Co | 101697 | Boise | 0 | 0 |
| Petrogulf Corporation | 101698 | Denver | 0 | 0 |
| Petroleum Dvlpmnt Corp | 101699 | Bridgeport | 0 | 0 |
| Petroleum Dvlpmnt Corp | 101700 | Casper | 0 | 0 |
| Petroleum Inc | 101701 | Wichita | 3 | 1 |
| Petroleum Inc | 101702 | Denver | 3 | 2 |
| Petroleum Synergy Grp Inc | 101703 | Denver | 0 | 0 |
| Petrostates Resources Inc | 101704 | Denver | 2 | 1 |
| Petrotech Inc | 101705 | Denver | 0 | 0 |
| Petrovest International | 101706 | Encino | 8 | 2 |
| Pettingill, Wesley | 101707 | Roosevelt | 0 | 0 |
| Pexco Inc | 101708 | San Francisco | 2 | 1 |
| PG&E Resources Company | 101709 | Dallas | 31 | 2 |
| Phelps Dodge Corp | 101710 | — | 4 | 2 |
| Phillips 66 Natural Gas Co | 101711 | Bartlesville | 0 | 0 |
| Phillips Oil Company | 101712 | Casper | 7 | 1 |
| Phillips Oil Company | 101713 | Bartlesville | 0 | 0 |
| Phillips Petroleum Co | 101714 | Farmington | 71 | 11 |
| Phillips Petroleum Company | 101716 | Bartlesville | 5 | 1 |
| Phillips Petroleum, LLCActive | 105446 | Ballard | 1 | 1 |
| Phillips, Jack L | 101717 | — | 3 | 2 |
| Phoenix Hydro Oper Corp | 101718 | Midland | 1 | 1 |
| Phoenix Hydrocarbons Inc | 101719 | Midland | 1 | 1 |
| Phoenix Resources Co | 101720 | Oklahoma City | 1 | 1 |
| Physiographics Inc | 101721 | — | 3 | 1 |
| Pickrell, Daniel J | 101722 | San Francisco | 1 | 1 |
| Pierce, Andy | 101723 | Salt Lake City | 2 | 2 |
| Pinnacle Oil | 101724 | — | 1 | 1 |
| Pinnacle Potash International LTD | 101725 | Austin | 0 | 0 |
| Pioneer Development Co | 101726 | — | 1 | 1 |
| Pioneer Natural Resources USA, Inc | 101727 | Midland | 54 | 5 |
| Pioneer Oil & Gas | 101728 | South Jordan | 3 | 2 |
| Pioneer Oil Company Inc | 101729 | Lawrenceville | 0 | 0 |
| Pioneer Uranium Corp | 101730 | — | 2 | 1 |
| Piute Energy | 101731 | Lubbock | 0 | 0 |
| Pixley, Kenneth | 101732 | Granbury | 7 | 1 |
| Placid Oil Company | 101733 | — | 18 | 7 |
| Plains Marketing LP | 101734 | Houston | 0 | 0 |
| Plains Petro Operating Co | 101735 | Lakewood | 0 | 0 |
| Plains Resources | 101736 | Houston | 0 | 0 |
| Plateau Inc | 101737 | Albuquerque | 0 | 0 |
| Pleasant Valley Oil Corp | 101738 | — | 2 | 1 |
| Pledger, Roy | 101739 | Evansville | 1 | 1 |
| PNC Utah LLC | 101740 | Wilmington | 0 | 0 |
| PO&G Operating, LLC (POGO)Active | 104365 | Houston | 24 | 1 |
| Pogo Producing Co | 101741 | Houston | 0 | 0 |
| Polly Ann Development Co | 101742 | — | 1 | 1 |
| Polumbus Corp, The | 101743 | Denver | 1 | 1 |
| Ponko Drilling | 101744 | — | 1 | 1 |
| Pool Energy Corp | 101745 | Denver | 1 | 1 |
| Pool Oil & Gas Co | 101746 | Denver | 1 | 1 |
| Pope, John | 101747 | — | 1 | 1 |
| Post Petroleum Company | 101748 | Oklahoma City | 0 | 0 |
| Potash Company of America | 101749 | — | 4 | 1 |
| Powell & Stone | 101750 | Gage | 0 | 0 |
| Powell, Betty | 101751 | Price | 1 | 1 |
| Precisioneering Inc | 101752 | Denver | 0 | 0 |
| Premier Technology | 101754 | Roy | 10 | 1 |
| Premium Oil Co | 101755 | — | 2 | 2 |
| Presidio Exploration Inc | 101756 | Englewood | 0 | 0 |
| Preston Oil Company LP | 101757 | The Woodlands | 1 | 1 |
| Price City | 101758 | Price | 0 | 0 |
| Price Petroleum Co | 101759 | — | 1 | 1 |
| Price River Energy, LLCActive | 104862 | Houston | 25 | 1 |
| Pride Ventures LLCActive | 101760 | Moab | 18 | 2 |
| Prima Exploration Inc | 101761 | Denver | 0 | 0 |
| Prima Oil & Gas Company | 101762 | Denver | 3 | 2 |
| Primary Fuels Inc | 101763 | Rock Springs | 6 | 1 |
| Princeton Resources LTD | 101764 | Littleton | 0 | 0 |
| Priority Oil & Gas LLC | 101765 | Denver | 0 | 0 |
| Pritchett, Frank Jr | 101766 | Grand Junction | 1 | 1 |
| Prize Operating Company | 101767 | Grapevine | 0 | 0 |
| Pro-Water LLC | 101768 | Rancho Cucamonga | 0 | 0 |
| Probe Oil Inc | 101769 | — | 1 | 1 |
| Prodco Inc | 101770 | Denver | 0 | 0 |
| Producers Oil Co | 101771 | — | 1 | 1 |
| Producers Operating Co Inc | 101772 | Amarillo | 1 | 1 |
| Production Operations and Abandonments, LLCActive | 105830 | West Jordan | 0 | 0 |
| Production Recovery Corp | 101773 | Roosevelt | 0 | 0 |
| Promontory & Federal | 101774 | — | 1 | 1 |
| Promontory Oil Co | 101775 | — | 10 | 3 |
| Prospector Energy Inc | 101776 | — | 2 | 1 |
| Prosper Oil & Mining | 101777 | — | 1 | 1 |
| Proven Petroleum Inc | 101778 | Lakewood | 0 | 0 |
| Proven Petroleum, Inc | 101779 | Lakewood | 0 | 0 |
| Provo Drilling Co | 101780 | — | 2 | 1 |
| Prudential Bache Energy | 101781 | Netarie | 0 | 0 |
| Pubco Petroleum Corp | 101782 | Albuquerque | 3 | 1 |
| Pulsipher, William | 101783 | Salt Lake City | 3 | 1 |
| Pumpelly, Raphael Jr | 101784 | Palisades | 0 | 0 |
| Pumpelly, Raphael Sr | 101785 | Pac Palisades | 15 | 1 |
| Pure Helium, LLC | 105059 | Denver | 1 | 1 |
| Pure Oil Co | 101786 | — | 7 | 3 |
| Pure Resources LP | 101787 | Midland | 0 | 0 |
| Pyramid Oil & Gas | 101788 | — | 1 | 1 |
| Python AG LLC | 101789 | Davis | 1 | 1 |
| Qep Energy Company | 101790 | Denver | 381 | 3 |
| Qep Field Services Company | 101791 | Denver | 0 | 0 |
| Qep Field Services Company | 101792 | Denver | 0 | 0 |
| Qep Field Services of Delaware LLC | 101793 | Denver | 0 | 0 |
| Qep Uinta Basin Inc | 101794 | Salt Lake City | 165 | 1 |
| Qep Uinta Basin Inc | 101795 | Vernal | 0 | 0 |
| Qepm Gathering I LLC | 101796 | Denver | 0 | 0 |
| Quan, William P | 101797 | Scottsdale | 0 | 0 |
| Quaneco LLC | 101798 | Woodland Hills | 16 | 2 |
| Quest/Interline Nat Gas | 101799 | Alpine | 3 | 3 |
| Questa Petroleum Inc | 101800 | — | 2 | 1 |
| Questar Energy Company | 101801 | Salt Lake C ity | 2 | 1 |
| Questar Exploration & Production Co | 101802 | Salt Lake City | 220 | 1 |
| Questar Exploration & Production Co | 101803 | Vernal | 0 | 0 |
| Questar Pipeline Company | 101804 | Salt Lake City | 0 | 0 |
| Questar Pipeline Company | 101805 | Salt Lake City | 0 | 0 |
| Questar Pipeline Company | 101806 | Salt Lake City | 0 | 0 |
| Questex Oil Company LLCActive | 105847 | Reno | 3 | 1 |
| Quigley, W Don | 101807 | — | 1 | 1 |
| Quinex Energy CorpActive | 101808 | Bountiful | 38 | 2 |
| Quinex Energy CorpActive | 101809 | Bountiful | 0 | 0 |
| Quinn, Gerald M | 101810 | Grand Junction | 2 | 1 |
| Quinoco Co | 101811 | Denver | 0 | 0 |
| Quintana Petroleum Corp | 101812 | Denver | 19 | 6 |
| R & J Exploration | 101813 | — | 1 | 1 |
| R & M Oil & Gas LTD | 101814 | Lakewood | 0 | 0 |
| R & R Well Service | 101815 | Grand Junction | 1 | 1 |
| R C Anderson Oil | 101816 | — | 1 | 1 |
| R Chapman Construction | 104420 | Roosevelt | 0 | 0 |
| R H Smith Restated Revoc | 101819 | Tulsa | 0 | 0 |
| R M T Properties Inc | 101817 | Cody | 0 | 0 |
| R N Industries | 101818 | Vernal | 0 | 0 |
| Raddatz-Vogel-Travis | 101820 | — | 1 | 1 |
| Rainy River Resources Inc | 101821 | Minneapolis | 7 | 1 |
| Ramco Operating Company | 101822 | Tulsa | 2 | 1 |
| Ramey, Earl N | 101823 | Richfield | 1 | 1 |
| Ramsey Petroleum Corp | 101824 | — | 1 | 1 |
| Ranch Holding Company | 101825 | — | 0 | 0 |
| Rancho Energy Corp | 101826 | — | 6 | 1 |
| Randall Exploration | 101827 | Denver | 2 | 1 |
| Rangeland Exploration Co | 101828 | Midland | 1 | 1 |
| Rangeland Petroleum Corp | 101829 | Midland | 1 | 1 |
| Ranken Energy Corp | 101830 | Edmond | 2 | 1 |
| Raplee, R L | 101831 | — | 1 | 1 |
| Ratner Oil Co | 101832 | — | 1 | 1 |
| Raymond Oil Company Inc | 101833 | Denver | 3 | 2 |
| RBDR LLC | 101834 | Tulsa | 1 | 1 |
| Read & Stevens Inc | 101835 | — | 1 | 1 |
| Read, R H Jr | 101836 | — | 1 | 1 |
| Red Rock Gathering Company, LLC | 101837 | Denver | 0 | 0 |
| Red Rock Gathering Company, LLC | 101838 | Denver | 0 | 0 |
| Red Wall Production and Drilling, LLC | 105192 | Manti | 0 | 0 |
| Reed | 101840 | — | 1 | 1 |
| Regoal Inc | 101841 | Price | 0 | 0 |
| Rei Underground Explor Inc | 101842 | Salt Lake City | 0 | 0 |
| Republic Resources Inc | 101843 | Grand Junction | 1 | 1 |
| Reserve Oil & Gas | 101844 | — | 7 | 3 |
| Reserve Petroleum Co | 101845 | Loveland | 1 | 1 |
| Resolute Natural Resources | 101847 | Denver | 0 | 0 |
| Resource Development Technology, LLC | 101848 | Morrison | 1 | 1 |
| Resource Strategies LLC | 101849 | Golden | 0 | 0 |
| Resource Ventures Corp | 101850 | — | 2 | 1 |
| Resources Investment Corp | 101851 | Denver | 3 | 1 |
| Retamco Operating Inc | 101852 | Red Lodge | 24 | 1 |
| reWater, LLCActive | 105392 | Provo | 1 | 1 |
| Reynolds & Carver | 101853 | — | 1 | 1 |
| Reynolds Metals Company | 101854 | Corpus Christi | 0 | 0 |
| Reynolds Mining Corp | 101855 | — | 7 | 2 |
| Reynolds, Paul J | 101856 | — | 3 | 1 |