| 1 | Rampion Offshore Wind Limited Swindon | £740.1M | — |
| 2 | Rwe Renewables UK Humber Wind Limited Swindon | £502.5M | — |
| 3 | Sonatrach Gas Marketing UK Limited London | £199.9M 2024 accounts | — |
| 4 | Templeborough Biomass Power Plant Limited London | £149.7M 2024 accounts | — |
| 5 | Foxglove Energy Supply Ltd Leicester Turnover £225.3M | £113.9M | £225.3M |
| 6 | Sutton Bridge Power Generation Bristol | £105.3M | — |
| 7 | Rhyl Flats Wind Farm Limited Swindon | £98.0M | — |
| 8 | Centalion UK Limited London Turnover £95.5M | £89.9M 2024 accounts | £95.5M |
| 9 | Whirlbush Solar Limited London Turnover £3.4M | £80.4M | £3.4M |
| 10 | Pretoria Energy Company (Mepal) Limited Chittering | £73.9M 2024 accounts | — |
| 11 | Blackcraig Wind Farm (Scotland) Limited Edinburgh Turnover £20.2M | £72.7M | £20.2M |
| 12 | Enbw UK Limited London | £67.2M 2022 accounts | — |
| 13 | Ellough AD Plant Limited Ely | £65.3M 2024 accounts | — |
| 14 | Thameswey Energy Limited London Turnover £7.6M | £64.2M 2024 accounts | £7.6M |
| 15 | Rwe Renewables UK Scroby Sands Limited Swindon | £57.6M 2024 accounts | — |
| 16 | Crown Gas and Power Limited Bury | £55.9M | — |
| 17 | Greengairs East Wind Farm Limited Milnthorpe | £55.3M | — |
| 18 | Pretoria Energy Company (Chittering) Limited Chittering | £51.6M 2024 accounts | — |
| 19 | Regent Gas Limited London Turnover £63.4M | £47.6M 2021 accounts | £63.4M |
| 20 | Ruby Energy Holdings Ltd Fleetwood | £43.3M 2024 accounts | — |
| 21 | MC Asset Co Limited Wellingborough Turnover £468.1k | £43.3M | £468.1k |
| 22 | Gaelectric Natural Resources Limited Belfast | £43.0M 2024 accounts | — |
| 23 | Chelveston Renewable Energy Limited Rushden | £41.4M 2022 accounts | — |
| 24 | Kinlochleven Power Ltd Perth Turnover £39.0M | £38.0M 2024 accounts | £39.0M |
| 25 | Jaylow Supplies Limited London Turnover £168.3M | £37.7M 2024 accounts | £168.3M |
| 26 | Dunbeg Windfarm Limited Belfast | £37.6M 2024 accounts | — |
| 27 | Birmingham Bio Power Limited London Turnover £10.1M | £32.3M | £10.1M |
| 28 | Shell Energy UK Limited London Turnover £211.2M | £31.6M 2021 accounts | £211.2M |
| 29 | Marble Power Limited Quedgeley | £28.2M | — |
| 30 | Refood UK Limited Doncaster Turnover £45.0M | £27.1M 2024 accounts | £45.0M |
| 31 | Wind Energy 2 Hold Co Limited Bristol | £25.7M 2019 accounts | — |
| 32 | A Shade Greener (F2) Ltd London | £25.7M 2024 accounts | — |
| 33 | Root-Power Limited Salford Quays | £24.8M | — |
| 34 | E (Gas and Electricity) Limited Wetherby Turnover £231.9M | £24.4M 2025 accounts | £231.9M |
| 35 | Evercreech Renewable Energy Limited Wellingborough | £23.4M 2022 accounts | — |
| 36 | Yorkshire Windpower Limited London Turnover £9.3M | £23.1M 2024 accounts | £9.3M |
| 37 | Green Farm Solar Limited London Turnover £0 | £22.3M | £0 |
| 38 | Anaerobic Advantage Limited London | £20.1M 2020 accounts | — |
| 39 | Redstow Renewables Limited Buntingford | £16.7M 2024 accounts | — |
| 40 | Lockerbie Biogas Limited Lockerbie | £16.7M 2023 accounts | — |
| 41 | Newton Down Windfarm Limited Bristol | £16.3M | — |
| 42 | Moelogan 2 C.C.C. Eglwysbach Turnover £5.1M | £16.1M 2025 accounts | £5.1M |
| 43 | Afon Wysg Energy Limited Nash Turnover £10.1M | £15.3M 2024 accounts | £10.1M |
| 44 | Char.Gy Limited London | £15.2M | — |
| 45 | Love Business Group Limited Bolton Turnover £37.9M | £14.6M 2024 accounts | £37.9M |
| 46 | Fidelity Energy Limited Newbury Turnover £16.7M | £14.2M 2024 accounts | £16.7M |
| 47 | Lochend Wind Energy Limited Hamilton | £13.2M | — |
| 48 | Port of Sheerness Wind Farm Limited Bristol | £12.8M | — |
| 49 | Valencia Energy Limited Stretton-On-Dunsmore Turnover £57.4M | £12.6M | £57.4M |
| 50 | JBM Solar Projects 2 Ltd Swindon Turnover £171.9k | £12.4M | £171.9k |
| 51 | Ruby Electricity Ltd Fleetwood | £12.3M | — |
| 52 | Wilson's Country Limited Co Armagh Turnover £29.8M | £12.2M 2024 accounts | £29.8M |
| 53 | Cwe Endurance Limited Godalming | £12.1M | — |
| 54 | Ebedei Holdings Limited London | £12.0M 2021 accounts | — |
| 55 | Ylem Flexible Power Limited Salford Quays | £11.9M | — |
| 56 | Cwe Norwin Limited Godalming | £11.5M | — |
| 57 | Tru Energy Limited London | £10.8M | — |
| 58 | LCC Power Limited Cookstown Turnover £137.2M | £10.7M 2024 accounts | £137.2M |
| 59 | Ylem Energy Limited Salford Quays Turnover £16.9M | £10.6M | £16.9M |
| 60 | Muirhall WF Extension 1 Limited Edinburgh Turnover £3.0M | £10.5M 2023 accounts | £3.0M |
| 61 | Crown Gas and Power 2 Limited Bury | £10.4M | — |
| 62 | Milford Haven Properties Limited Milford Haven | £10.4M | — |
| 63 | Valda Energy Limited Bicester | £10.3M | — |
| 64 | Cwe Northwind Limited Godalming | £9.8M | — |
| 65 | Codford Biogas Limited Norwich | £9.3M 2020 accounts | — |
| 66 | Air Liquide Advanced Business and Technologies UK Limited Birmingham Turnover £521.9k | £8.8M 2019 accounts | £521.9k |
| 67 | JBM Solar Projects 6 Ltd Swindon Turnover £173.7k | £8.6M | £173.7k |
| 68 | Yorkshire Hydropower Limited Kings Langley | £8.6M 2019 accounts | — |
| 69 | Sors Markets Ltd London Turnover £82.5M | £8.6M | £82.5M |
| 70 | Burton Wold Wind Farm South Ltd London Turnover £2.7M | £8.6M 2024 accounts | £2.7M |
| 71 | Orbital Marine Power (Orkney) PLC Kirkwall | £7.5M 2023 accounts | — |
| 72 | Panasonic Heating & Ventilation Air-Conditioning UK Ltd Welwyn Garden City Turnover £35.2M | £7.5M 2023 accounts | £35.2M |
| 73 | Black Hill Wind Farm Limited London | £7.4M 2024 accounts | — |
| 74 | Wind Energy (NI) Limited Belfast | £7.1M 2019 accounts | — |
| 75 | Carn Hill Windfarm Limited Belfast | £7.1M 2024 accounts | — |
| 76 | Achnacarry Hydro Ltd Edinburgh | £7.0M 2023 accounts | — |
| 77 | Versa Energy Limited London | £6.9M | — |
| 78 | Hemswell Biogas Limited Gainsborough Turnover £11.1M | £6.7M | £11.1M |
| 79 | Online Direct Limited Northampton Turnover £26.4M | £6.7M | £26.4M |
| 80 | Cwe Turbines Limited Godalming | £6.5M | — |
| 81 | Swangate Energy Storage Limited London | £6.4M 2022 accounts | — |
| 82 | Local Generation Limited Gainsborough Turnover £12.2M | £6.2M | £12.2M |
| 83 | Excool Limited Droitwich | £5.9M | — |
| 84 | Freathy Solar Park Limited Bristol | £5.7M | — |
| 85 | Cwe X Limited Godalming | £5.7M | — |
| 86 | Sunsave 1 Limited Faversham | £5.5M 2024 accounts | — |
| 87 | E E Solutions Limited Leeds | £5.1M | — |
| 88 | Cwe RTW Limited Godalming | £4.9M | — |
| 89 | Goring Power Ltd Salford Quays Turnover £983.2k | £4.9M | £983.2k |
| 90 | Cwe Wuk Limited Godalming | £4.9M | — |
| 91 | Abbots Ann Farm Solar Park Limited Bristol | £4.8M | — |
| 92 | Smartestenergy Business Limited Worthing | £4.7M | — |
| 93 | Green Highland Allt Ladaidh (1148) Limited Edinburgh | £4.7M 2023 accounts | — |
| 94 | Canada Farm Solar Park Limited Bristol | £4.4M | — |
| 95 | Condair Limited Littlehampton Turnover £9.3M | £4.4M | £9.3M |
| 96 | Nanteague Solar Limited Bristol | £4.3M | — |
| 97 | Green Highland Allt Phocachain (1015) Limited Edinburgh | £4.2M 2023 accounts | — |
| 98 | Cregganconroe Windfarm Limited Belfast | £4.2M 2024 accounts | — |
| 99 | Muirake Wind Farm Limited Edinburgh | £4.1M 2020 accounts | — |
| 100 | Sandys Moor Solar Limited Bristol | £4.1M | — |
| 101 | Cwe Endure Limited Godalming | £4.0M | — |
| 102 | Heywood Power Limited Salford Quays Turnover £144.4k | £4.0M | £144.4k |
| 103 | Logicool Air Conditioning & Heat Pumps Limited Gallows Hill | £3.9M 2024 accounts | — |
| 104 | Cwe Belhus Limited Godalming | £3.9M | — |
| 105 | Cwe V27 Limited Godalming | £3.9M | — |
| 106 | UK Direct Business Solutions (Group) Limited Houghton Le Spring | £3.6M 2022 accounts | — |
| 107 | Cwe DS Limited Godalming | £3.5M | — |
| 108 | Inishative Windfarm Limited Belfast | £3.5M 2024 accounts | — |
| 109 | Africa Greenco Group Limited Thames Ditton | £3.5M 2023 accounts | — |
| 110 | Cwe Airdrie Limited Godalming | £3.4M | — |
| 111 | Cwe Gardrum Limited Godalming | £3.4M | — |
| 112 | Sunlight Technology Limited London Turnover £227.1k | £3.2M 2024 accounts | £227.1k |
| 113 | Gardrum Farm Wind Energy Limited Hamilton | £3.2M | — |
| 114 | Farm Power Apollo Limited Bristol | £3.0M | — |
| 115 | (UK) Direct Global Limited Houghton Le Spring | £3.0M 2022 accounts | — |
| 116 | Cwe Donaldson Limited Godalming | £2.8M | — |
| 117 | Cumberhead Wind Energy Limited London | £2.8M 2020 accounts | — |
| 118 | Asc Energy PLC London | £2.8M 2021 accounts | — |
| 119 | Habitat Energy Limited London | £2.8M 2021 accounts | — |
| 120 | Gridreserve Ltd London Turnover £2.1M | £2.7M 2023 accounts | £2.1M |
| 121 | Energen Biogas Limited Cumbernauld | £2.7M 2024 accounts | — |
| 122 | Monnaboy Windfarm Limited Belfast | £2.7M 2024 accounts | — |
| 123 | Green Highland Allt Choire A Bhalachain (255) Limited Edinburgh | £2.6M 2023 accounts | — |
| 124 | Huddle Utilities Ltd London | £2.6M | — |
| 125 | F & S Energy Limited Chelmsford Turnover £57.6M | £2.6M | £57.6M |
| 126 | Key Integrated Services (Electrical) Limited Manchester | £2.5M | — |
| 127 | Avantigas on Ltd Chesterfield Turnover £24.4M | £2.4M 2020 accounts | £24.4M |
| 128 | Green Highland Allt Luaidhe (228) Limited Edinburgh | £2.3M 2023 accounts | — |
| 129 | Mornflake Energy Limited Cheshire Turnover £864.8k | £2.3M | £864.8k |
| 130 | Cloonty Windfarm Limited Belfast | £2.2M 2024 accounts | — |
| 131 | Anchor Renewables Ltd London Turnover £359.6k | £2.2M 2024 accounts | £359.6k |
| 132 | Guardian Solar Ltd London Turnover £286.2k | £2.2M 2024 accounts | £286.2k |
| 133 | White Rose Solar Ltd London Turnover £164.3k | £2.2M 2024 accounts | £164.3k |
| 134 | Aspect Solar Ltd London Turnover £203.2k | £2.2M 2024 accounts | £203.2k |
| 135 | FRV Powertek Limited Reading | £2.1M | — |
| 136 | Astral Solar Ltd London Turnover £169.6k | £2.1M 2024 accounts | £169.6k |
| 137 | Kvasir Technologies Ltd London | £2.1M 2024 accounts | — |
| 138 | Cwe WTN Limited Godalming | £2.1M | — |
| 139 | Applied Solar Ltd London Turnover £172.3k | £2.0M 2024 accounts | £172.3k |
| 140 | Cwe Jacobshall Limited Godalming | £2.0M | — |
| 141 | Corby Knowe Windfarm Limited Belfast | £1.9M 2024 accounts | — |
| 142 | Gaia Power Systems Ltd London Turnover £245.0k | £1.9M 2024 accounts | £245.0k |
| 143 | Cwe Vestas Limited Godalming | £1.8M | — |
| 144 | Cwe NW3 Limited Godalming | £1.8M | — |
| 145 | Elementary Energy Limited London | £1.8M | — |
| 146 | Tritility Limited Jarrow Turnover £13.2M | £1.7M | £13.2M |
| 147 | Cwe Meikle Float Limited Godalming | £1.7M | — |
| 148 | FS West Gourdie Limited London | £1.6M 2021 accounts | — |
| 149 | Cwe Struan Limited Godalming | £1.6M | — |
| 150 | Upper Pitforthie Windgen PLC Montrose Turnover £524.5k | £1.5M | £524.5k |
| 151 | Blue Planet Solar Limited Houghton Le Spring | £1.4M 2025 accounts | — |
| 152 | Nextpower Grey Street Solar Limited London | £1.3M 2021 accounts | — |
| 153 | Paytherden Solar Farm Limited Bristol | £1.3M | — |
| 154 | Isg Renewables Limited Cheltenham | £1.2M 2024 accounts | — |
| 155 | Yü Energy Holding Limited Nottingham Turnover £17.5M | £1.1M 2023 accounts | £17.5M |
| 156 | North Farm Solar Extension Limited London Turnover £610.7k | £1.1M | £610.7k |
| 157 | BF27 BF Solar Limited Bristol | £1.1M 2025 accounts | — |
| 158 | Gaelectric Green Energy Limited Belfast | £1.1M 2024 accounts | — |
| 159 | Enfinium Kelvin Limited London | £1.0M 2019 accounts | — |
| 160 | Thanet Energy Limited Birchington | £974.6k 2024 accounts | — |
| 161 | Enel X UK Limited London Turnover £3.3M | £947.3k 2019 accounts | £3.3M |
| 162 | FRV Services Energy UK Limited Reading Turnover £478.9k | £932.2k | £478.9k |
| 163 | Distgen Hinton LGC PLC Bristol Turnover £463.8k | £903.0k 2025 accounts | £463.8k |
| 164 | Hamsard 3767 Limited London | £896.0k 2024 accounts | — |
| 165 | Dalmarnock Bess Ltd London | £880.6k 2023 accounts | — |
| 166 | Oakapple Berwickshire Limited Manchester | £864.4k | — |
| 167 | Gretton Solar Farm Limited Bristol Turnover £680.2k | £801.0k 2019 accounts | £680.2k |
| 168 | Joju Limited London | £762.9k | — |
| 169 | Barrow Shipping Limited Hexham Turnover £20.3M | £749.1k 2021 accounts | £20.3M |
| 170 | Ecossol PV Limited London Turnover £274.9k | £745.8k 2024 accounts | £274.9k |
| 171 | Distgen Rogershill LGC PLC Bristol Turnover £273.7k | £744.7k 2025 accounts | £273.7k |
| 172 | Whitehouse Farm Energy Barn Limited Bristol | £741.9k | — |
| 173 | Eclipse Power Limited Milton Keynes | £714.7k 2019 accounts | — |
| 174 | Whitton Solar Limited Bristol | £663.2k | — |
| 175 | Wormit Solar Farm Limited Bristol Turnover £583.4k | £655.9k 2019 accounts | £583.4k |
| 176 | Southbank Place Energy Company Limited London Turnover £1.8M | £541.4k | £1.8M |
| 177 | Sheepwash Lane Energy Barn Limited Bristol | £489.8k | — |
| 178 | Lapwing Fen II Ltd. London | £428.3k 2021 accounts | — |
| 179 | Thornton Lane Solar Farm Limited Bristol Turnover £427.2k | £425.4k 2019 accounts | £427.2k |
| 180 | Glenniston Solar Project Ltd Birmingham | £414.9k 2025 accounts | — |
| 181 | Padley Wood Solar Limited Bristol | £388.0k | — |
| 182 | Morton Wood Solar Limited Bristol | £373.3k | — |
| 183 | BF33E BHF Solar Limited Bristol | £357.7k 2025 accounts | — |
| 184 | Oakapple Two Limited Manchester | £319.6k 2024 accounts | — |
| 185 | HW Solar Farm Limited Bristol | £299.6k | — |
| 186 | Oakapple One Limited Manchester | £281.9k 2024 accounts | — |
| 187 | Docking Farm Solar Limited London Turnover £0 | £270.9k | £0 |
| 188 | AR108 Bolt Solar Farm Limited Bristol | £260.0k | — |
| 189 | LH Dno Grid Services Limited Bristol | £254.8k | — |
| 190 | Engelhart CTP Energy UK Ltd. London | £222.2k 2022 accounts | — |
| 191 | Dayfields Solar Limited Bristol | £217.9k | — |
| 192 | Solar Ecossol Limited London Turnover £54.6k | £205.3k 2024 accounts | £54.6k |
| 193 | Stairfoot Generation Ltd London Turnover £2.4M | £201.7k 2023 accounts | £2.4M |
| 194 | Maxen Power Supply Limited Ilford | £188.0k 2022 accounts | — |
| 195 | S & E Wind Energy Limited Belfast | £186.0k 2019 accounts | — |
| 196 | FRV Tyler Hill Bess 1 Limited Reading | £172.9k | — |
| 197 | Sweet Briar Solar Farm Limited Bristol | £161.5k | — |
| 198 | Twineham Energy Limited Bristol | £149.7k | — |
| 199 | BF31 WHF Solar Limited Bristol | £122.3k | — |
| 200 | St. Johns Hill Wind Limited Aberdeen | £114.8k 2024 accounts | — |
| 201 | AR006 GF Solar Limited Bristol | £110.3k | — |
| 202 | West Raynham X Energy Park Limited Bristol | £108.7k | — |
| 203 | Haunton Farmers' Solar Limited London Turnover £0 | £94.2k | £0 |
| 204 | BF58 Hunts Airfield Solar Ltd Bristol | £93.5k | — |
| 205 | Lightning 1 Energy Park Limited Bristol | £89.7k | — |
| 206 | High Constellation Windfarm Limited London | £86.7k 2020 accounts | — |
| 207 | Greenlink Developments Limited London Turnover £805.7k | £82.4k 2019 accounts | £805.7k |
| 208 | Ruby Gas Ltd Fleetwood | £47.7k | — |
| 209 | JCM Golomoti UK Ltd Oxfordshire | £40.0k 2019 accounts | — |
| 210 | Fortescue UK IP Limited Edinburgh | £36.9k 2024 accounts | — |
| 211 | Porth Wen Solar Limited Sunderland | £27.9k 2020 accounts | — |
| 212 | Electroroute Energy Supply NI Limited Newry | £493 2021 accounts | — |
| 213 | Ukgea 1 Limited London | £300 2022 accounts | — |
| 214 | Lurg Hill Wind Farm Limited Edinburgh | £100 2021 accounts | — |
| 215 | Ecostor 1 Immingham Ltd London | £100 2022 accounts | — |
| 216 | Newhurst Erf Holding Limited London | £6 2019 accounts | — |
| 217 | Rosefield Energyfarm Limited Houghton Le Spring | £1 2019 accounts | — |
| 218 | Newhurst Erf Limited London | £1 2019 accounts | — |
| 219 | Middleton Energy Storage Limited London | £1 2022 accounts | — |
| 220 | Alfreton Solar Limited London | £1 2022 accounts | — |
| 221 | Ecosolar 1 Berrington Limited London | £1 2022 accounts | — |
| 222 | Ecopower 2 Park Farm Ltd London | £1 2022 accounts | — |
| 223 | Ecosolar 3 Leighton Limited London | £1 2022 accounts | — |
| 224 | Ecopower 3 Hayton Ltd London | £1 2022 accounts | — |
| 225 | Ecopower 5 Exton Ltd London | £1 2022 accounts | — |
| 226 | Woolpots Solar Farm Limited London | -£43 2022 accounts | — |
| 227 | Vida Bioenergy Glentham Ltd London | -£212 2022 accounts | — |
| 228 | Springwell Energyfarm Limited Houghton Le Spring | -£269 2021 accounts | — |
| 229 | Alleston Clean Energy Limited London | -£436 2021 accounts | — |
| 230 | Hagshaw Hill Repowering Ltd Glasgow | -£922 2020 accounts | — |
| 231 | Wse Bourton Road Limited Chatham | -£1.3k 2022 accounts | — |
| 232 | Altnabreac Wind Farm Limited Edinburgh | -£1.3k 2020 accounts | — |
| 233 | Drummarnock Wind Farm Limited Edinburgh | -£1.3k 2020 accounts | — |
| 234 | Balmeanach Wind Farm Limited Edinburgh | -£1.4k 2020 accounts | — |
| 235 | Cumberhead West Wind Farm Ltd. Glasgow | -£2.1k 2020 accounts | — |
| 236 | Berryhill Solar Farm Limited Edinburgh | -£2.9k 2024 accounts | — |
| 237 | Roc Noir Limited London | -£3.8k 2023 accounts | — |
| 238 | Kearsley North Green NG Limited Stockport | -£4.1k 2023 accounts | — |
| 239 | Ben Sca Wind Farm Limited Edinburgh | -£5.0k 2020 accounts | — |
| 240 | Hamilton Solar Ltd London | -£7.4k 2021 accounts | — |
| 241 | Ducklington Solar Limited Cheltenham | -£7.8k 2023 accounts | — |
| 242 | Salamander Wind Project Company Ltd Aberdeen | -£8.1k 2021 accounts | — |
| 243 | Elmya RPC UK Melbourne Limited London | -£8.3k 2022 accounts | — |
| 244 | Elmya RPC UK Rednal Limited London | -£8.3k 2022 accounts | — |
| 245 | Elmya RPC UK Braybrooke Limited London | -£8.5k 2022 accounts | — |
| 246 | FP Lux Scurf Dyke Solar Limited Milton Keynes | -£9.3k 2020 accounts | — |
| 247 | Elmya RPC UK Grange Road Limited London | -£10.1k 2022 accounts | — |
| 248 | Oaks Farm Solar Limited Cheltenham | -£12.6k | — |
| 249 | Perwinnes Solar and Battery Storage Limited Cheltenham | -£12.6k | — |
| 250 | Siddington Solar Farm Limited London | -£14.3k 2021 accounts | — |
| 251 | Stokeford Grid Co Limited Cheltenham | -£14.4k 2023 accounts | — |
| 252 | Elmya RPC UK Hunterston Limited London | -£20.4k 2022 accounts | — |
| 253 | Regener8 SPV 4 Limited London Turnover £0 | -£24.4k | £0 |
| 254 | Conrad Energy (Trading) Limited Abingdon | -£24.6k 2021 accounts | — |
| 255 | Buntington Green Energy Centre Ltd Bristol | -£33.7k | — |
| 256 | Yorkshire Hydropower Holdings Limited Kings Langley | -£38.6k 2019 accounts | — |
| 257 | Dunmow Solar Limited Bristol | -£49.7k 2025 accounts | — |
| 258 | Cwe Lochend Limited Godalming | -£50.1k | — |
| 259 | Low Farm Solar Limited London | -£61.0k 2021 accounts | — |
| 260 | Rotherham Solar 1 Ltd London | -£63.1k 2024 accounts | — |
| 261 | Greengridpower1 Ltd London | -£65.8k 2021 accounts | — |
| 262 | Woodington Solar Limited London | -£71.9k 2022 accounts | — |
| 263 | UK Power Distribution Limited Northampton | -£84.2k 2020 accounts | — |
| 264 | South Shields Energy Storage Ltd London Turnover £6.5M | -£84.6k 2020 accounts | £6.5M |
| 265 | Noventum Power Solar 10 Limited London | -£88.1k | — |
| 266 | Welbar Energy Storage Limited London | -£179.6k 2021 accounts | — |
| 267 | Energetech Operations Limited London Turnover £346.6k | -£266.5k | £346.6k |
| 268 | Conrad Energy Limited Abingdon | -£448.9k 2021 accounts | — |
| 269 | Elgin Grid Connections Ltd Weybridge | -£658.7k | — |
| 270 | Arbroath Limited London Turnover £2.1M | -£864.5k 2023 accounts | £2.1M |
| 271 | Coupar Limited London Turnover £2.4M | -£1.1M 2023 accounts | £2.4M |
| 272 | Trickey Warren Solar Limited Bristol | -£1.2M | — |
| 273 | Monan Wind Company Limited Hamilton | -£1.8M | — |
| 274 | Project Plug Limited Derry | -£1.8M 2021 accounts | — |
| 275 | Riverside Energy Park Limited London | -£2.0M 2019 accounts | — |
| 276 | Enderby Storage Limited London Turnover £2.8M | -£2.3M 2023 accounts | £2.8M |
| 277 | IR Dno Limited Cheltenham | -£2.5M 2024 accounts | — |
| 278 | Yelvertoft Solar Farm Limited Bristol | -£5.9M 2024 accounts | — |
| 279 | Sqe Energy Limited London | -£10.4M | — |
| 280 | Noriker Staunch Ltd London Turnover £963.2k | -£12.2M 2024 accounts | £963.2k |
| 281 | Flexitricity Limited Aberdeen | -£13.1M 2024 accounts | — |
| 282 | UK Battery Storage Ltd London | -£17.6M 2023 accounts | — |
| 283 | Infinis (Re-Gen) Limited Northampton | — | — |
| 284 | Slough Heat & Power Limited Reading | — | — |
| 285 | Appledore Shipbuilders Limited Dorset | — | — |
| 286 | Billam (Sheffield) Realisations Limited Leeds | — | — |
| 287 | Equans FM Limited Newcastle Upon Tyne | — | — |
| 288 | Fred. Olsen Limited London | — | — |
| 289 | Simec Lochaber Hydropower 2 Limited Leamington Spa | — | — |
| 290 | CHC Group Limited Co.Armagh | — | — |
| 291 | Clarke Energy Limited Indust, Liverpool | — | — |
| 292 | Yelspa Limited Andover | — | — |
| 293 | University of Liverpool Energy Company Limited Liverpool | — | — |
| 294 | National Gas Transmission PLC Warwick | — | — |
| 295 | Inovyn Energy Limited Runcorn | — | — |
| 296 | Totalenergies Gas & Power Limited Tadworth | — | — |
| 297 | National Grid Electricity Distribution Generation Limited Bristol | — | — |
| 298 | Edf Energy Customers Limited London | — | — |
| 299 | UK Power Networks Services (Contracting) Limited London | — | — |
| 300 | Seaforth Power Limited | — | — |