| Aggregate Industries UK Limited | 57 | 2025-12 |
| Altus Intervention Limited | 45 | 2024-06 |
| Anglo American Woodsmith Limited | 34 | 2025-12 |
| Antin Cats Limited | 0 | 2022-12 |
| Archer (UK) Limited | 49 | 2025-12 |
| Awilco Drilling PLC | 33 | 2021-06 |
| Baker Hughes Limited | 28 | 2022-06 |
| Bg Global Energy Limited | 13 | 2019-12 |
| Bg International Limited | 41 | 2025-12 |
| Bp Amoco Exploration (In Amenas) Limited | 39 | 2022-12 |
| Bp Exploration (Alpha) Limited | 28 | 2020-06 |
| Bp Exploration (Angola) Limited | 35 | 2025-12 |
| Bp Exploration (Azerbaijan) Limited | 3 | 2025-12 |
| Bp Exploration (Caspian Sea) Limited | 18 | 2025-12 |
| Bp Exploration (Delta) Limited | 20 | 2025-12 |
| Bp Exploration (Epsilon) Limited | 13 | 2025-12 |
| Bp Exploration Operating Company Limited | 27 | 2025-12 |
| Bp Gas Marketing Limited | 19 | 2025-12 |
| Breedon Cement Limited | 59 | 2025-12 |
| Breedon Southern Limited | 54 | 2025-12 |
| Brett Aggregates Limited | 48 | 2025-12 |
| Brett Landscaping Limited | 54 | 2025-12 |
| British Salt Limited | 62 | 2026-03 |
| Britoil Limited | 26 | 2025-12 |
| Burlington Resources (Irish Sea) Limited | 26 | 2020-12 |
| Cairn Energy Hydrocarbons Limited | 58 | 2026-03 |
| Cambrian Stone Limited | 39 | 2022-12 |
| Can (Offshore) Limited | 26 | 2019-12 |
| Cats North Sea Limited | 20 | 2022-12 |
| Celtic Energy Limited | 30 | 2021-09 |
| Cemex UK Operations Limited | 51 | 2025-12 |
| Centrica Lng Company Limited | 2 | 2025-12 |
| Centrica Lng UK Limited | 1 | 2025-12 |
| Centrica Storage Limited | 39 | 2025-12 |
| Chevron Britain Limited | 30 | 2025-12 |
| Chevron North Sea Limited | 37 | 2020-12 |
| Chrysaor Limited | 24 | 2020-12 |
| Chrysaor North Sea Limited | 25 | 2020-12 |
| Cleveland Potash Limited | 29 | 2019-06 |
| Cnr International (U.k.) Developments Limited | 10 | 2025-06 |
| Cnr International (U.k.) Limited | 27 | 2025-12 |
| Conocophillips (U.k.) Britannia Limited | 30 | 2020-12 |
| Conocophillips (U.k.) Limited | 30 | 2020-12 |
| Conocophillips Petroleum Company U.k. Limited | 30 | 2020-12 |
| Dana Petroleum (E&p) Limited | 27 | 2025-12 |
| Dolphin Drilling Limited | 37 | 2020-12 |
| E. F. Oil and Gas Limited | 31 | 2025-12 |
| Endeavour Energy UK Limited | 19 | 2023-12 |
| Eni Elgin/franklin Limited | 36 | 2024-06 |
| Eni Jpda 03-13 Limited | 32 | 2023-12 |
| Eni Pakistan Limited | 29 | 2023-12 |
| Eni UK Limited | 42 | 2025-12 |
| Eni Ulx Limited | 30 | 2024-12 |
| Enquest Britain Limited | 29 | 2025-12 |
| Enquest Heather Limited | 29 | 2025-12 |
| Ensco Offshore U.k. Limited | 55 | 2024-12 |
| Ensco Rowan PLC | 20 | 2020-12 |
| Ensco Services Limited | 55 | 2025-12 |
| Ensco U.k. Limited | 0 | 2021-12 |
| Enterprise Oil Limited | 57 | 2025-12 |
| Equinor Production UK Limited | 28 | 2021-12 |
| Equinor UK Limited | 30 | 2021-12 |
| Equion Energia Limited | 18 | 2023-12 |
| Esso Exploration and Production UK Limited | 12 | 2025-12 |
| Fircroft Engineering Services Limited | 10 | 2026-04 |
| Fmc Technologies Limited | 45 | 2025-12 |
| Fp Mccann Limited | 29 | 2025-12 |
| Fresnillo PLC | 23 | 2025-12 |
| Gallagher Aggregates Limited | 25 | 2026-03 |
| Hall Construction Services Limited | 45 | 2025-07 |
| Halliburton Manufacturing and Services Limited | 42 | 2025-12 |
| Hanson Aggregates Marine Limited | 40 | 2025-12 |
| Hanson Quarry Products Europe Limited | 57 | 2025-12 |
| Hillhouse Quarry Group Limited | 32 | 2019-09 |
| Hills Quarry Products Limited | 41 | 2023-10 |
| Hurricane Energy PLC | 11 | 2022-12 |
| Imerys Minerals Limited | 35 | 2019-06 |
| Ineos E&p (UK) Limited | 10 | 2025-12 |
| Ineos Fps Limited | 23 | 2025-12 |
| Ineos UK E&p Holdings Limited | 26 | 2025-12 |
| Ineos UK Sns Limited | 5 | 2024-12 |
| Ithaca Energy (UK) Limited | 34 | 2025-12 |
| Javelin Global Commodities (UK) Ltd | 22 | 2021-06 |
| John Wainwright & Co. Limited | 48 | 2019-09 |
| Jx Nippon Exploration and Production (U.k.) Limited | 18 | 2025-12 |
| Kca Deutag Technical Support Limited | 62 | 2025-12 |
| Lafarge Cauldon Limited | 78 | 2025-12 |
| Marathon Oil West of Shetlands Limited | 11 | 2020-06 |
| Marubeni Oil & Gas (U.k.) Limited | 11 | 2021-12 |
| Mick George Limited | 49 | 2025-12 |
| Midland Quarry Products Limited | 44 | 2025-12 |
| Mitsui E&p UK Limited | 22 | 2020-12 |
| National Oilwell Varco UK Limited | 61 | 2025-06 |
| Neo Energy (Sns) Limited | 25 | 2024-06 |
| Neo Energy (Ukcs) Limited | 12 | 2024-12 |
| Neo Energy (Zni) Limited | 13 | 2023-12 |
| Neo Energy Central North Sea Limited | 10 | 2025-12 |
| Neo Energy Natural Resources Limited | 15 | 2023-12 |
| Neo Energy Pathway Limited | 8 | 2023-12 |
| Neo Energy Production UK Limited | 24 | 2025-12 |
| Neptune E&p UK Limited | 42 | 2024-06 |
| Neptune E&p UK Ltd | 34 | 2018-12 |
| Nexen Petroleum U.k. Limited | 27 | 2025-12 |
| Nov Downhole Eurasia Limited | 120 | 2025-06 |
| Nsmp Operations Limited | 36 | 2025-12 |
| Ophir Energy PLC | 10 | 2024-12 |
| Patersons of Greenoakhill Limited | 31 | 2019-11 |
| Perenco UK Limited | 27 | 2025-12 |
| Petrofac (Malaysia-pm 304) Limited | 259 | 2022-06 |
| Petrofac Facilities Management Limited | 86 | 2025-12 |
| Pgs Exploration (UK) Limited | 36 | 2023-12 |
| Premier Oil E&p UK Limited | 29 | 2021-06 |
| Premier Oil UK Limited | 29 | 2021-06 |
| Productionquest Limited | 35 | 2022-06 |
| Pttep Sp Limited | 30 | 2025-06 |
| Repsol Sinopec Resources UK Limited | 28 | 2025-12 |
| Rockrose Ukcs4 Limited | 29 | 2020-12 |
| Rps Energy Limited | 35 | 2018-12 |
| Sabah Shell Petroleum Company Limited | 28 | 2025-12 |
| Saint-gobain Construction Products UK Limited | 55 | 2025-12 |
| Seadrill Management Ltd. | 18 | 2024-06 |
| Seadrill UK Operations Ltd | 16 | 2022-12 |
| Serica Energy (UK) Limited | 29 | 2025-12 |
| Serica Energy Chinook Limited | 23 | 2025-12 |
| Sewells Reservoir Construction Limited | 39 | 2025-12 |
| Shaw Pipeline Services UK Limited | 35 | 2025-12 |
| Shawcor UK Limited | 17 | 2025-12 |
| Shell China Exploration and Production Company Limited | 7 | 2018-12 |
| Shell Clair UK Limited | 70 | 2025-12 |
| Shell Ep Offshore Ventures Limited | 47 | 2021-06 |
| Shell Trinidad and Tobago Limited | 87 | 2025-12 |
| Shell Tunisia Upstream Limited | 36 | 2025-12 |
| Shell U.k. Limited | 46 | 2025-12 |
| Spirit Energy North Sea Limited | 37 | 2025-12 |
| Spirit Energy North Sea Oil Limited | 28 | 2022-12 |
| Spirit Energy Production UK Limited | 36 | 2025-12 |
| Spirit Energy Resources Limited | 39 | 2025-12 |
| Spirit Energy Southern North Sea Limited | 30 | 2024-12 |
| Sse E&p UK Limited | 14 | 2021-09 |
| Stena Carron Drilling Limited | 11 | 2025-12 |
| Stena Don Drilling Limited | 22 | 2024-12 |
| Stena Drilling Limited | 41 | 2024-12 |
| Stena Drillmax Ice Limited | 17 | 2025-06 |
| Stena Evolution Drilling Limited | 34 | 2025-12 |
| Stork Technical Services (Rbg) Limited | 32 | 2021-06 |
| Subsea 7 I-tech Limited | 39 | 2026-06 |
| Subsea 7 Limited | 34 | 2026-06 |
| Subsea 7 Offshore Resources (UK) Limited | 37 | 2026-06 |
| Subsea 7 Pipeline Production Limited | 36 | 2026-06 |
| Subsea Leasing Limited | 16 | 2024-12 |
| Tailwind Energy Ltd | 4 | 2025-12 |
| Tailwind Mistral Ltd | 18 | 2025-12 |
| Taqa Bratani Limited | 28 | 2026-06 |
| Taqa Bratani Lns Limited | 15 | 2026-06 |
| Tarmac Aggregates Limited | 46 | 2025-12 |
| Tarmac Trading Limited | 33 | 2025-12 |
| Technip UK Limited | 62 | 2025-12 |
| Teesside Gas & Liquids Processing | 26 | 2023-12 |
| Tillicoultry Quarries Limited | 39 | 2025-09 |
| Total E&p North Sea UK Limited | 31 | 2025-12 |
| Total E&p UK Limited | 31 | 2025-12 |
| Total Oil UK Limited | 31 | 2025-12 |
| Transocean Onshore Support Services Limited | 30 | 2025-12 |
| Tullow Group Services Limited | 27 | 2024-12 |
| Tullow Oil Sk Limited | 26 | 2018-12 |
| Vitol Broking Limited | 12 | 2025-12 |
| Weatherford U.k. Limited | 76 | 2019-06 |
| Westerngeco Limited | 66 | 2019-12 |
| Whitemountain Quarries Ltd | 64 | 2025-12 |
| Wood Group UK Limited | 36 | 2025-12 |
| Worleyparsons Services UK Limited | 27 | 2025-12 |