| Keypoint Property Managment Ltd | Hospitality | 2025 |
| Keyrise Properties Ltd | Households | 2024 |
| Keyrock Homes Limited | Construction | 2026 |
| Keyroofing Ltd | Construction | 2026 |
| Keyspace Properties Ltd | Real estate | 2019 |
| Keystone Associates Limited | Administrative & support | 2006 |
| Keystone Builders SW Ltd | Construction | 2017 |
| Keystone Capital Ventures Ltd | Financial services | 2024 |
| Keystone Commercial Properties Limited | Real estate | 2020 |
| Keystone CSS Limited | Real estate | 2013 |
| Keystone Financial Services Limited | Financial services | 2024 |
| Keystone Holdings (Cambs) Ltd | Other services | 2024 |
| Keystone Management Solutions Limited | Administrative & support | 2019 |
| Keystone Residential Properties Limited | Construction | 2022 |
| Keystones Housing Services Ltd | Hospitality | 2006 |
| Keystones Mental Health Support Services Limited | Health & social care | 2006 |
| Keystroke Consultancy Ltd. | Information & communication | 2025 |
| Keytags Direct Limited | Wholesale & retail | 2009 |
| Kez's Cafe & Bar Ltd | Hospitality | 2026 |
| Kezico Group Ltd | Wholesale & retail | 2024 |
| Kezzies Ltd | Hospitality | 2023 |
| KF Bristol Ltd | Hospitality | 2026 |
| KFB Bristol Limited | Hospitality | 2023 |
| Kfpt Limited | Construction | 2012 |
| KFR BD Limited | Hospitality | 2025 |
| Kfruitveg Ltd | Wholesale & retail | 2019 |
| Kfsc Ltd | Health & social care | 2025 |
| KG Barbers Ltd | Other services | 2019 |
| KG Doodles Ltd | Health & social care | 2013 |
| KG Enterprises (SW) Ltd | Professional & scientific | 2024 |
| KG Stores SIX Ltd | Wholesale & retail | 2025 |
| KG2015 Ltd | Construction | 2015 |
| Kgina Limited | Health & social care | 2020 |
| KGK Property Ltd | Real estate | 2022 |
| KGT (SW) Ltd | Hospitality | 2024 |
| Kgvi Salon Ltd | Other services | 2019 |
| KH Bristol Limited | Hospitality | 2022 |
| KH Dent Ltd | Health & social care | 2021 |
| KH Dynamic Solutions Ltd | Information & communication | 2024 |
| KH Pill (2020) Ltd | Hospitality | 2020 |
| KH12ONE Ltd | Wholesale & retail | 2023 |
| Khaas | Health & social care | 2005 |
| Khaki Tarw Ltd | Real estate | 2023 |
| Khaldoon Ophthalmics Ltd | Health & social care | 2025 |
| Khalidya Ventures Limited | Health & social care | 2021 |
| Khan Autos Bristol Ltd | Wholesale & retail | 2022 |
| Khan Muhammad Limited | Wholesale & retail | 2025 |
| Khan Services Bristol Limited | Information & communication | 2022 |
| Khans Shopin Ltd | Wholesale & retail | 2025 |
| Khanum Holdings Limited | Real estate | 2016 |
| Khao Restaurant Ltd | Hospitality | 2026 |
| Khaos World Ltd | Arts & recreation | 2014 |
| Kharon Ltd | Professional & scientific | 2023 |
| KHD Collective Ltd. | Wholesale & retail | 2026 |
| Kheir Medical Ltd | Health & social care | 2025 |
| Khhb Holdings Limited | Financial services | 2023 |
| Khichri Productions Limited | Professional & scientific | 2011 |
| Khis Ltd | Professional & scientific | 2016 |
| KHL Plant and Machinery Ltd | Wholesale & retail | 2013 |
| KHN Npng Ltd | Education | 2024 |
| Khrop Khrua Ltd | Hospitality | 2023 |
| Khushbu Designs Ltd | Professional & scientific | 2026 |
| Khyber Food Bristol Ltd | Hospitality | 2025 |
| KI Global Partners Limited | Professional & scientific | 2025 |
| Ki-Cad Limited | Professional & scientific | 2004 |
| Kiaros Agape Ltd | Extraterritorial | 2025 |
| Kick Start Health Fitness & Martial Arts Academy Limited | Arts & recreation | 2018 |
| Kicking the Door Down Limited | Information & communication | 2026 |
| Kickstart Coaching UK Ltd | Education | 2023 |
| Kidderminster Harriers F.C. Football in the Community | Education | 2001 |
| Kidner Agricultural Contractors Limited | Agriculture & fishing | 2012 |
| Kidson Orthodontics Limited | Professional & scientific | 2010 |
| Kidz Craze Community CIC | Health & social care | 2026 |
| Kidz Hub Bristol Limited | Health & social care | 2020 |
| Kiental Limited | Administrative & support | 2004 |
| Kier Fades Barbershop Ltd | Other services | 2026 |
| Kieran Mulholland Cars Ltd | Wholesale & retail | 2017 |
| Kierex Limited | Other services | 2015 |
| KIF Productions Ltd | Information & communication | 2025 |
| Kifass Ltd | Construction | 2023 |
| KIG Property Ltd | Real estate | 2025 |
| KIH International Limited | Professional & scientific | 2022 |
| Kiingmedia Ltd | Manufacturing | 2019 |
| KIK Media Limited | Information & communication | 2017 |
| Kikin Studio Limited | Other services | 2025 |
| Kikisfootwear Ltd | Wholesale & retail | 2025 |
| Kiks Flowers Ltd | Wholesale & retail | 2024 |
| Kilbirnie Consulting Ltd | Extraterritorial | 2014 |
| Kildare Homes Limited | Construction | 2018 |
| Kildas Capital Ltd | Financial services | 2023 |
| Kilic & Kilic Ltd | Hospitality | 2014 |
| Kill.It Agency Ltd | Information & communication | 2025 |
| Killawot Limited | Information & communication | 2011 |
| Killean Consulting Ltd | Professional & scientific | 2025 |
| Kilmanok LP | | 2012 |
| Kilminster Consultancy Limited | Financial services | 2012 |
| Kilminster Motivation Ltd | Information & communication | 2020 |
| Kiln House Management Limited | Households | 1997 |
| Kiln Power Limited | Energy | 2016 |
| Kiln Workshop Ltd | Other services | 2024 |