| Old Cottage Field Limited | Mining & quarrying | 2021 |
| Old Horseshoe Company Ltd | Manufacturing | 2023 |
| Old Millfield Works Management Limited | Households | 2024 |
| Old Rectory (Blithfield) Management Company Limited | Real estate | 2003 |
| Oldminster Properties Limited | Other services | 2008 |
| Olds School Driving Ltd | Education | 2025 |
| Olidar Asset Group Limited | Financial services | 2025 |
| Oliharv Limited | Financial services | 2025 |
| Oliver P Curran Architectural Services Limited | Construction | 2008 |
| Olivermanleyproperty Limited | Households | 2023 |
| Olivia George Limited | Information & communication | 2011 |
| OLL2 Limited | Professional & scientific | 2019 |
| Ollena & Co. Ltd | Real estate | 2026 |
| Ollerenshaws Limited | Professional & scientific | 2001 |
| Olsam Crooks LLP | | 2017 |
| Omnitech Communications Limited | Information & communication | 2000 |
| Omorfi Beauty Limited | Other services | 2025 |
| On-Line Auto Sport Limited | Wholesale & retail | 1999 |
| ON3 Partners Limited | Professional & scientific | 2015 |
| One One SIX Daktari Limited | Households | 2025 |
| Onetone Apparel Limited | Wholesale & retail | 2024 |
| OPC Energy Ltd | Construction | 2019 |
| Opelise Limited | Wholesale & retail | 2010 |
| Operational Assets Ltd | Wholesale & retail | 2025 |
| Opposite Pictures Limited | Information & communication | 2020 |
| Opsdec Ltd | Information & communication | 2026 |
| Orbit Clean Ltd | Administrative & support | 2017 |
| Orchard TBD Ltd | Professional & scientific | 2018 |
| Organise Your Business Ltd | Extraterritorial | 2017 |
| Organised Finances Ltd | Professional & scientific | 2024 |
| Orion Veterinary Referrals Ltd | Professional & scientific | 2023 |
| Osborn Head Office Limited | Professional & scientific | 2014 |
| Osborne Transport Solutions Limited | Transport & logistics | 2025 |
| Osis Trucks Ltd | Transport & logistics | 2022 |
| Oslateth Ltd | Transport & logistics | 2019 |
| Osmington Garage Limited | Wholesale & retail | 2025 |
| Otrebla Ltd | Wholesale & retail | 2026 |
| Otto Albert UX Limited | Information & communication | 2023 |
| Outrider Games Ltd | Wholesale & retail | 2024 |
| Oval Facilities Management Ltd | Administrative & support | 2024 |
| Overseas Commodities Limited | Real estate | 1947 |
| OVM Dentes Ltd | Health & social care | 2017 |
| Ovonis Limited | Water & waste | 2025 |
| Ozanam Developments Ltd | Real estate | 2023 |
| P G Property Holdings Ltd | Real estate | 2020 |
| P H & C Easter Builders Ltd | Construction | 2022 |
| P L Structures Limited | Construction | 2015 |
| P R Tools Ltd | Wholesale & retail | 2014 |
| P. Whalley and Sons Limited | Wholesale & retail | 1973 |
| P.A.T Fire Safety Limited | Professional & scientific | 2023 |
| P.B.M. Building Services (Midlands) Limited | Construction | 2004 |
| P.I. Property Development Limited | Real estate | 2003 |
| Paasaar Estates Ltd | Real estate | 2026 |
| Packington Holdings Limited | Construction | 2004 |
| Padel Plus Limited | Administrative & support | 2023 |
| Page One Position Limited | Extraterritorial | 2011 |
| Paladin Advice Ltd | Financial services | 2019 |
| Paladin Properties Ltd | Real estate | 2021 |
| Paladin Wealth Ltd | Administrative & support | 2019 |
| Palameda Limited | Real estate | 2024 |
| Palega Limited | Administrative & support | 2010 |
| Palletcap Ltd | Manufacturing | 2004 |
| Palletways (UK) Limited | Transport & logistics | 1994 |
| Palletways Group Limited | Financial services | 2004 |
| Pallu & Lake Limited | Manufacturing | 2005 |
| Panache Enterprises Ltd | Other services | 2019 |
| Panel Care U.K. Ltd | Administrative & support | 2022 |
| Panventure Ltd | Professional & scientific | 2016 |
| Paper Moon Limited | Information & communication | 2011 |
| Paperknowhowassociates Ltd. | Professional & scientific | 2015 |
| Paramount Garden Rooms Limited | Construction | 2026 |
| Paraphernalia (Lichfield) Ltd | Wholesale & retail | 2017 |
| Parcroft Ltd | Financial services | 2021 |
| Park Cottage Farms Limited | Agriculture & fishing | 1998 |
| Park Fever Supplies Ltd | Wholesale & retail | 2016 |
| Park Publishing Company Limited | Professional & scientific | 1998 |
| Parkend Limited | Extraterritorial | 2013 |
| Parker Hall (Lichfield) Ltd | Real estate | 2014 |
| Parker Hall Ltd | Real estate | 2025 |
| Parker James Protective Coatings Limited | Wholesale & retail | 2005 |
| Parking Seventy Limited | Extraterritorial | 2016 |
| Parrott Farms Ltd | Agriculture & fishing | 2012 |
| Parsons View Residential Management Company Limited | Administrative & support | 2017 |
| Parvyn Ltd | Hospitality | 2023 |
| Pasco Medical Limited | Manufacturing | 2021 |
| Pase Developments Limited | Construction | 2010 |
| Passeport Limited | Administrative & support | 2007 |
| Pastiche (Stafford) Ltd | Hospitality | 2025 |
| PAT Collins (Funfairs) Limited | Administrative & support | 2007 |
| PAT Collins Limited | Administrative & support | 2009 |
| Paterson VFX Ltd | Information & communication | 2026 |
| Patty Freaks Lichfield Ltd | Hospitality | 2022 |
| Paul Collins HSE Consulting Ltd | Professional & scientific | 2026 |
| Paul Huxley Construction Limited | Construction | 2008 |
| Pawprint Trading Limited | Wholesale & retail | 2017 |
| Paws & Praise Limited | Education | 2014 |
| PAY Less Tyres Limited | Wholesale & retail | 2009 |
| Payton Distribution Ltd | Wholesale & retail | 2026 |
| PB Commercial Premises Limited | Real estate | 2015 |
| PB Interim Solutions Ltd | Professional & scientific | 2019 |