| K C Professionals Ltd | Professional & scientific | 1996 |
| K2 Training Services Limited | Information & communication | 2007 |
| KBB Systems Group Ltd | Wholesale & retail | 2018 |
| Kellythorpe Properties Limited | Extraterritorial | 2015 |
| Kichwa Tembo Properties Limited | Real estate | 2020 |
| Kinetic LAB Furnishings Limited | Professional & scientific | 2009 |
| Kinetic Laboratories Limited | Manufacturing | 2004 |
| Kingfisher Fish and Chips Ltd | Hospitality | 2017 |
| Kingston Cruises Ltd | Transport & logistics | 2024 |
| Kingston Ornate Plaster Limited | Manufacturing | 2003 |
| Kingston Refrigeration Services Limited | Manufacturing | 1999 |
| Kingston Vapes Limited | Wholesale & retail | 2014 |
| Kirk & Moore Holdings Limited | Financial services | 2019 |
| Kirk & Moore Properties Limited | Real estate | 2019 |
| Kirk Podiatry Ltd | Health & social care | 2022 |
| Kirkby Lindsey Electrical Engineering Limited | Manufacturing | 1987 |
| Klmtravelservice Limited | Transport & logistics | 2017 |
| Kmrg Engineering Ltd | Other services | 2023 |
| L'Amour Hair Limited | Other services | 2019 |
| LA PAZ of Driffield Limited | Hospitality | 2020 |
| Lanentech Ltd | Other services | 2023 |
| Lasercroft Limited | Construction | 1991 |
| Lexiphanic Limited | Professional & scientific | 2016 |
| Lily's Hornsea Ltd | Hospitality | 2021 |
| Lion Software Engineering Limited | Information & communication | 2025 |
| Local Transport Projects Group Limited | Financial services | 2024 |
| Lockway Locksmiths Ltd | Construction | 2019 |
| Luxinar Limited | Manufacturing | 1997 |
| M Properties (Yorkshire) Limited | Professional & scientific | 2007 |
| M Watling Property Services Limited | Professional & scientific | 2011 |
| M.B. Roche & Sons Limited | Construction | 1982 |
| M.B. Roche & Sons Plant Hire Limited | Administrative & support | 1982 |
| M.K.M. Building Supplies (Blackpool) Limited | Wholesale & retail | 2017 |
| M.K.M. Building Supplies (Louth) Limited | Wholesale & retail | 2017 |
| M.K.M. Building Supplies (Warrington) Limited | Wholesale & retail | 2017 |
| Magcc Limited | Construction | 2024 |
| Matakki Limited | Wholesale & retail | 2014 |
| MBS Engineering Projects Limited | Professional & scientific | 2003 |
| Mega Market Store Ltd | Wholesale & retail | 2025 |
| Megaplant Limited | Administrative & support | 1972 |
| Mill Wheel Systems Limited | Information & communication | 1995 |
| Millmod Properties Limited | Real estate | 2021 |
| MJC Building Services Limited | Construction | 2019 |
| Moldova (Hull) Limited | Wholesale & retail | 2022 |
| More Than Just Medicine Limited | Health & social care | 2022 |
| MRC Hull Group Ltd | Real estate | 2018 |
| MRF Asbestos Solutions Limited | Professional & scientific | 2013 |
| My ORD Property Limited | Real estate | 2023 |
| N L & C Oakes Limited | Wholesale & retail | 2014 |
| New Aviation Limited | Other services | 2023 |
| Next Wave Stage Academy CIC | Arts & recreation | 2026 |
| Nortech Services Limited | Wholesale & retail | 1983 |
| NOW Then Design Limited | Professional & scientific | 2012 |
| Octovision Media Limited | Professional & scientific | 2014 |
| OFF the Bridle Limited | Professional & scientific | 2017 |
| Ouroboros Industries Limited | Professional & scientific | 2021 |
| Overdrive Nutrition Limited | Arts & recreation | 2017 |
| P & D Glazing Limited | Construction | 2009 |
| PAD Ventures Ltd | Extraterritorial | 2024 |
| Palm Tree Skin Clinic Ltd | Wholesale & retail | 2023 |
| Panda Nursery Ltd | Education | 2011 |
| Parker-Blu Properties Limited | Real estate | 2020 |
| PB Cladding Limited | Construction | 2017 |
| PCS Aviation Limited | Administrative & support | 2013 |
| Pcsm DRY Lining and Plastering Limited | Construction | 2017 |
| Pear Tree Residential Care Limited | Health & social care | 2019 |
| Phil Clark Mobile Vehicle Services Ltd | Wholesale & retail | 2023 |
| Phils Flooring Limited | Extraterritorial | 2012 |
| Phoenix Developments, Management and Leasing Limited | Households | 2025 |
| Pixel 2 Print Limited | Professional & scientific | 2011 |
| Pontone Classics Limited | Wholesale & retail | 2021 |
| Positive Access Solutions Limited | Professional & scientific | 2010 |
| Precision Drilling 2000 Limited | Construction | 1996 |
| Preston Furniture Solutions Ltd | Professional & scientific | 2017 |
| Pro-Clean Facilities Ltd | Administrative & support | 2021 |
| Procom Professional Services Holdings Ltd | Information & communication | 2018 |
| Proforce Technical Ltd | Professional & scientific | 2014 |
| Project Missing Limited | Professional & scientific | 2021 |
| Props for Togs Limited | Professional & scientific | 2019 |
| Protech Sound and Light Limited | Other services | 2020 |
| PWC Care Limited | Health & social care | 2003 |
| Queensway Projects Limited | Extraterritorial | 2008 |
| Queensway Properties Limited | Households | 1993 |
| R & M (Scarborough) Limited | Hospitality | 2021 |
| R&C Hydraulics Limited | Professional & scientific | 2012 |
| R&M Associates (Cambs) Ltd | Professional & scientific | 2016 |
| Reality Solutions Limited | Wholesale & retail | 2012 |
| Red Brook Boarding Limited | Other services | 2022 |
| Restore Surgery Limited | Health & social care | 2009 |
| Ricky's Trading Limited | Professional & scientific | 2020 |
| Riva Foods Limited | Manufacturing | 2009 |
| Rivercity Group Limited | Financial services | 2018 |
| Rivercity Properties Limited | Real estate | 2018 |
| RM Complementary Health Care Limited | Health & social care | 2012 |
| Roach Bros (Curers) Limited | Manufacturing | 1991 |
| Robstar (Holdings) Limited | Extraterritorial | 2005 |
| Rojo Maintenance Limited | Construction | 2014 |
| Rosedana Limited | Hospitality | 2024 |
| S & a Investments Limited | Real estate | 2001 |
| S J Adlard Limited | Construction | 2010 |