| OUR Community Matters CIC | Health & social care | 2023 |
| OUR Space Partnership Ltd | Information & communication | 2006 |
| OUT Bounce Limited | Arts & recreation | 2023 |
| Outback Events Limited | Administrative & support | 2010 |
| Outback Group Limited | Other services | 2020 |
| Over & Above Style Ltd | Wholesale & retail | 2021 |
| Overend Holdings Limited | Real estate | 2023 |
| Overseas Workforce Recruitment Ltd | Administrative & support | 2026 |
| OW Brickwork Ltd | Construction | 2017 |
| OW DO 2 Cafe Limited | Hospitality | 2026 |
| Owais Motors Ltd | Wholesale & retail | 2016 |
| Owen Claxton Production Ltd | Information & communication | 2025 |
| Owen Site Services Limited | Manufacturing | 2024 |
| OX Drywall Ltd | Construction | 2017 |
| Oxalyst Nominee Limited | Extraterritorial | 2023 |
| Oxalyst Partners Limited | Professional & scientific | 2018 |
| Oxer & Dayman Plumbing & Heating Limited | Construction | 2009 |
| Oxley & Coward Limited | Real estate | 2006 |
| Oxley & Coward Solicitors LLP | | 2010 |
| Oxyfire Media Creative Ltd | Information & communication | 2010 |
| Oyeks Property Ltd | Real estate | 2024 |
| OZ KEM Investments Ltd | Real estate | 2025 |
| P & M Metals Limited | Wholesale & retail | 1999 |
| P & R Rigging Ltd | Information & communication | 2019 |
| P D R Electrical Engineers Limited | Construction | 1992 |
| P J Jevons Limited | Water & waste | 2003 |
| P J Thomas Transport Limited | Transport & logistics | 2022 |
| P Oaten Commercial Management Limited | Professional & scientific | 2022 |
| P P 2010 (UK) Limited | Other services | 2013 |
| P P Storage Ltd | Administrative & support | 2024 |
| P Redgate Limited | Wholesale & retail | 2022 |
| P S Associates (Yorkshire) Ltd | Health & social care | 2019 |
| P S Data Ltd | Construction | 2022 |
| P&H Lettings Ltd | Real estate | 2022 |
| P&N Accountants Limited | Professional & scientific | 2008 |
| P&P Partners Ltd | Wholesale & retail | 2020 |
| P&S Chahal Limited | Professional & scientific | 2024 |
| P. C. Kelly Plumbing & Heating (Rotherham) Limited | Construction | 1990 |
| P.A. Keenan Limited | Construction | 2025 |
| P.E. Hair Repair Ltd | Other services | 2024 |
| P.S.W Sales Ltd | Other services | 2020 |
| P.W. Eddison Designs Limited | Professional & scientific | 1998 |
| P1 Maintenance Ltd | Professional & scientific | 2024 |
| P2GO Ltd | Hospitality | 2024 |
| Paalelgvad Ltd | Information & communication | 2023 |
| PAC International Limited | Extraterritorial | 1978 |
| Pace Wholesales Limited | Wholesale & retail | 2023 |
| Pacote Limited | Professional & scientific | 2015 |
| Padcos Rail Services Ltd | Construction | 2015 |
| Paddy Bermingham Plant Hire Ltd | Construction | 2015 |
| Padel Partnership Group Limited | Real estate | 2024 |
| Padgett Developments Limited | Construction | 2011 |
| Pageant Pewter Ltd | Manufacturing | 2003 |
| Pagem Project Management Ltd | Information & communication | 2011 |
| Paigor Transport Limited | Transport & logistics | 2014 |
| Paint and Plaster Ltd | Administrative & support | 2013 |
| Paint Solutions Barnsley Limited | Wholesale & retail | 2008 |
| Paint Solutions UK Ltd | Professional & scientific | 2016 |
| Paintfix Services Ltd | Construction | 2025 |
| Paladin CSC Consultancy Ltd | Professional & scientific | 2026 |
| Palakh Holdings Ltd | Real estate | 2020 |
| Paleo Fitness Ltd | Arts & recreation | 2014 |
| Pallet Storage Near ME Limited | Transport & logistics | 2025 |
| Pallet World Limited | Wholesale & retail | 2024 |
| Palletech Limited | Wholesale & retail | 2025 |
| Palmarium Limited | Information & communication | 2005 |
| Palmowski Hair Design Limited | Other services | 2022 |
| Pamperlicious Ltd | Administrative & support | 2026 |
| Pancake Time Sheffield Ltd | Hospitality | 2025 |
| Panettone & Rossi Ltd | Real estate | 2025 |
| Panoramic Future Investments Limited | Real estate | 2018 |
| Panta Rhei Global Ltd | Extraterritorial | 2014 |
| Panther Enterprises Ltd. | Financial services | 2024 |
| Paper Island Limited | Extraterritorial | 2006 |
| Parat Travel Limited | Transport & logistics | 2015 |
| Parbrook Developments Ltd | Construction | 2018 |
| PARCEL2YOU Ltd | Transport & logistics | 2025 |
| Parish Elite Private Hire Ltd | Transport & logistics | 2014 |
| Parity Care Ltd. | Health & social care | 2014 |
| Parity Community Support Ltd | Health & social care | 2022 |
| Park Gate Carpets Limited | Wholesale & retail | 2016 |
| Parker & Jones Manual Therapy Ltd | Other services | 2022 |
| Parker G Limited | Wholesale & retail | 2018 |
| Parker Rhodes Hickmotts Solicitors Limited | Professional & scientific | 2012 |
| Parkgate Accountants Ltd | Professional & scientific | 2018 |
| Parkgate Chop Suey House Limited | Hospitality | 2023 |
| Parkgate Hand Carwash Ltd | Administrative & support | 2024 |
| Parkgate Motor Hub Limited | Wholesale & retail | 2021 |
| Parkgate Sports & Social Club | Arts & recreation | 2023 |
| Parkin Accountancy Ltd | Professional & scientific | 2007 |
| Parkins Accountants Ltd | Professional & scientific | 2012 |
| Parkins Payroll Ltd | Professional & scientific | 2018 |
| Parkins Property and Letting Ltd | Real estate | 2025 |
| Parks Family Properties Limited | Real estate | 2023 |
| Parks Renovations Limited | Real estate | 2025 |
| Parkway Sheet Metal Works Limited | Manufacturing | 1983 |
| Parlermed Ltd | Information & communication | 2022 |
| Parp Holdings Ltd | Manufacturing | 2022 |
| Partnersdiy Ltd | Wholesale & retail | 2025 |
| Party Themes Limited | Other services | 2020 |