| Leyonne Energy Limited | Truro | 2012 |
| Leys Solar Energy C.I.C. | Scorrier | 2015 |
| Leyton Electrical Services Ltd | Warwickshire | 2003 |
| LF Electrical North West Ltd | Manchester | 2025 |
| LF International Trading Ltd | London | 2025 |
| Lfer Limited | Royston | 2025 |
| LFG Energy Systems Limited | Borehamwood | 2025 |
| LG-B-50A Limited | Edinburgh | 2023 |
| LH DNO Grid Services Limited | Bristol | 2023 |
| LH Nget Grid Services Limited | Sheffield | 2023 |
| LH Services Limited | Manchester | 2009 |
| LHF Energy Limited | Halifax | 2014 |
| LHM GAS Services Limited | Benfleet | 2023 |
| Liac Ltd | Bristol | 2026 |
| Liatrie Burn Hydro Ltd | Edinburgh | 2014 |
| Liberty Energy Limited | Leatherhead | 2011 |
| Liberty Industries PPA Ltd | Leamington Spa | 2017 |
| Life Easy Ltd | London | 2025 |
| Lifestyle GAS Contractors Ltd | Knutsford | 2020 |
| Lightening Supplies Ltd | Cleethorpes | 2023 |
| Lighthouse Air Conditioning Ltd | Belfast | 2019 |
| Lighting Junky Limited | Kidderminster | 2018 |
| Lightning 1 Energy Park Limited | Bristol | 2021 |
| Lightning Electrical Services Limited | Hornchurch | 2007 |
| Lightning Energy Limited | Newcastle Upon Tyne | 2020 |
| Lightning Sparks Ltd | Witham | 2016 |
| Lightsource Asset Holdings (Australia) Limited | London | 2019 |
| Lightsource Asset Holdings (Europe) Limited | London | 2019 |
| Lightsource Asset Holdings (Spain) Limited | London | 2019 |
| Lightsource Asset Holdings (UK) Limited | London | 2017 |
| Lightsource Asset Holdings (USA) Limited | London | 2019 |
| Lightsource Asset Holdings 1 Limited | London | 2019 |
| Lightsource Asset Holdings 2 Limited | London | 2019 |
| Lightsource Asset Holdings 3 Limited | London | 2019 |
| Lightsource Asset Management Limited | London | 2014 |
| Lightsource Australia Finco Holdings Limited | London | 2015 |
| Lightsource Bodegas 2 Limited | London | 2015 |
| Lightsource Bodegas 3 Limited | London | 2020 |
| Lightsource Bodegas 4 Limited | London | 2020 |
| Lightsource Bodegas Borrower Limited | London | 2026 |
| Lightsource Bodegas Holdings Limited | London | 2026 |
| Lightsource Bodegas Limited | London | 2019 |
| Lightsource BP Renewable Energy Investments Limited | London | 2015 |
| Lightsource Brazil Holdings 1 Limited | London | 2013 |
| Lightsource Brazil Holdings 2 Limited | London | 2015 |
| Lightsource Commercial Rooftops Limited | London | 2013 |
| Lightsource Construction Management Limited | London | 2012 |
| Lightsource Corinthian Limited | London | 2015 |
| Lightsource Cosecha Limited | London | 2023 |
| Lightsource Development Services Limited | London | 2017 |
| Lightsource Egypt Holdings Limited | London | 2012 |
| Lightsource ELK Hill 2 Solar Limited | London | 2015 |
| Lightsource ELK Hill Solar 2 Holdings Limited | London | 2015 |
| Lightsource Finca 2 Limited | London | 2015 |
| Lightsource Finca 3 Limited | London | 2020 |
| Lightsource Finca Limited | London | 2019 |
| Lightsource France Holdings UK Limited | London | 2015 |
| Lightsource Grace 1 Limited | London | 2017 |
| Lightsource Grace 2 Limited | London | 2017 |
| Lightsource Grace 3 Limited | London | 2018 |
| Lightsource Holdings 1 Limited | London | 2017 |
| Lightsource Holdings 2 Limited | London | 2017 |
| Lightsource Holdings 3 Limited | London | 2017 |
| Lightsource Iberia Greenfield Holdings Limited | London | 2015 |
| Lightsource Iberia Project Holdings Limited | London | 2020 |
| Lightsource Impact 1 Limited | Liverpool | 2015 |
| Lightsource Impact 2 Limited | Liverpool | 2015 |
| Lightsource India Holdings Limited | London | 2016 |
| Lightsource India Limited | London | 2016 |
| Lightsource India Maharashtra 1 Holdings Limited | Liverpool | 2016 |
| Lightsource India Maharashtra 1 Limited | Liverpool | 2016 |
| Lightsource Kingfisher Holdings Limited | London | 2017 |
| Lightsource Kite Holdings Limited | London | 2026 |
| Lightsource Kite Limited | London | 2026 |
| Lightsource Labs 1 Limited | London | 2013 |
| Lightsource Manzanilla Limited | London | 2020 |
| Lightsource Operations 1 Limited | London | 2017 |
| Lightsource Operations 2 Limited | London | 2017 |
| Lightsource Operations 3 Limited | London | 2017 |
| Lightsource Operations Services Limited | London | 2017 |
| Lightsource Poland Holdings (UK) Limited | London | 2015 |
| Lightsource Property 1 Limited | London | 2016 |
| Lightsource Renewable Energy (India) Limited | London | 2016 |
| Lightsource Renewable Energy (NI) Limited | Belfast | 2015 |
| Lightsource Renewable Energy Asia Pacific Holdings Limited | London | 2015 |
| Lightsource Renewable Energy Australia Holdings Limited | London | 2017 |
| Lightsource Renewable Energy Greece Holdings (UK) Limited | London | 2015 |
| Lightsource Renewable Energy Greece Holdings 2 (UK) Limited | London | 2022 |
| Lightsource Renewable Energy Greece Projects 2 Limited | London | 2015 |
| Lightsource Renewable Energy Holdings Limited | London | 2015 |
| Lightsource Renewable Energy Iberia Holdings Limited | London | 2015 |
| Lightsource Renewable Energy India Assets Limited | London | 2017 |
| Lightsource Renewable Energy India Holdings Limited | London | 2017 |
| Lightsource Renewable Energy India Projects Limited | Liverpool | 2017 |
| Lightsource Renewable Energy Italy Holdings Limited | London | 2013 |
| Lightsource Renewable Energy Limited | London | 2014 |
| Lightsource Renewable Energy Moristel Limited | London | 2015 |
| Lightsource Renewable Energy Netherlands Holdings Limited | London | 2017 |
| Lightsource Renewable Energy New Zealand Holdings Limited | London | 2022 |
| Lightsource Renewable Energy Poland Projects 1 Limited | London | 2015 |