| K&Z Personal Advisor Ltd | Professional & scientific | 2025 |
| K'S Delight Ltd | Wholesale & retail | 2025 |
| K-Delta Construction Ltd | Construction | 2023 |
| K-Newarch Strategies Ltd | Information & communication | 2025 |
| K-TOP25 Ltd | Hospitality | 2025 |
| K-Wings Limited | Hospitality | 2025 |
| K. N. Elton Limited | Real estate | 1977 |
| K.J. Corgi Ltd | Construction | 2018 |
| K12 Construction Limited | Construction | 2025 |
| K123 Courier Limited | Transport & logistics | 2026 |
| K2 Global Enterprises Ltd | Transport & logistics | 2022 |
| K2AQUA Ltd | Wholesale & retail | 2017 |
| K2L Limited | Manufacturing | 2023 |
| K4 Events Ltd | Administrative & support | 2024 |
| K4 Group Services Ltd | Professional & scientific | 2005 |
| K4 Incorporation Ltd | Administrative & support | 2022 |
| K4 K9 Ltd | Administrative & support | 2024 |
| K4 Medics Ltd | Public administration | 2024 |
| K4 Security Ltd | Administrative & support | 2020 |
| K4 Workforce Ltd | Administrative & support | 2024 |
| KA Universal Properties Limited | Real estate | 2026 |
| Kaanchi London Ltd | Arts & recreation | 2024 |
| Kabul Market Ltd | Wholesale & retail | 2022 |
| KAD Real Estate Limited | Real estate | 2007 |
| Kada Cargo Limited | Transport & logistics | 2021 |
| Kada Homes and Investments Ltd | Real estate | 2021 |
| Kadamotors Limited | Wholesale & retail | 2021 |
| Kaeast (UK) Limited | | 1985 |
| Kaers Ltd | Transport & logistics | 2015 |
| Kager Houses Ltd | Construction | 2026 |
| Kahh Capital Ltd | Hospitality | 2026 |
| Kaia Vekaria Limited | Professional & scientific | 2024 |
| Kaif Ride Ltd | Transport & logistics | 2026 |
| Kainth Haulage Ltd | Transport & logistics | 2025 |
| Kairoco Ltd | Real estate | 2025 |
| Kaizen Global Services Ltd | Information & communication | 2025 |
| Kaizen Sushi and Bento Ltd | Hospitality | 2026 |
| Kajla (Cranford) LLP | | 2018 |
| Kajla Ltd | Real estate | 2017 |
| Kakeko Investments Ltd | Financial services | 2022 |
| Kaki Skyline Apartment 228 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 229 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 230 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 231 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 232 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 233 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 234 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 277 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 278 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 279 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 280 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 281 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 282 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 283 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 304 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 310 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 316 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 320 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 322 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 324 Limited | Real estate | 2022 |
| Kaki Skyline Apartment 325 Limited | Real estate | 2022 |
| Kaksha Ltd | Education | 2024 |
| Kalaalayam Limited | Other services | 2015 |
| Kalair Driving School Ltd | Education | 2023 |
| Kalanaur Entreprises Ltd | Wholesale & retail | 2026 |
| Kaler Foods Ltd | Hospitality | 2025 |
| Kalra Properties Ltd | Financial services | 2021 |
| Kalush Group Ltd | Construction | 2025 |
| Kaluva Ltd | Construction | 2026 |
| KAM Capital Ltd | Administrative & support | 2023 |
| Kamal Trading Limited | Wholesale & retail | 2023 |
| Kamaljit Brickwork Ltd | Construction | 2023 |
| Kaman Professional Services Ltd | Professional & scientific | 2008 |
| Kamao Developers Ltd | Construction | 2024 |
| Kamari West London Properties Limited | Real estate | 2020 |
| Kamberi Property Investment Ltd | Real estate | 2023 |
| Kambo GAS Services Limited | Construction | 2018 |
| Kamboj Ltd | Wholesale & retail | 2020 |
| Kamehameha Limited | Real estate | 2025 |
| Kamiiboii Ltd | Real estate | 2025 |
| Kamjee Ltd | Wholesale & retail | 2025 |
| Kamlesh Investments UK Ltd | Wholesale & retail | 2022 |
| Kamma Build Ltd | Construction | 2026 |
| Kamzz Properties Ltd | Real estate | 2026 |
| Kanakadhara Limited | Information & communication | 2015 |
| Kanakavarsha Limited | Information & communication | 2021 |
| Kandianpro Limited | Professional & scientific | 2013 |
| Kang Development Project Ltd | Construction | 2020 |
| Kangg Limited | Construction | 2024 |
| Kanhaiya Foods Limited | Wholesale & retail | 2023 |
| Kanteen Cafe Ltd | Hospitality | 2026 |
| Kanvs Ltd | Wholesale & retail | 2025 |
| KAP4 Consulting Limited | Information & communication | 2014 |
| Kapoor & Brothers Ltd | Real estate | 2025 |
| Kapoor & Sons 321 Ltd | Real estate | 2025 |
| Kapoor 7 to 11 Ltd | Real estate | 2025 |
| Kapoor Associates Ltd | Real estate | 2024 |
| Kapoor Capital Holdings Ltd | Real estate | 2019 |
| Kapoor Supermarket Limited | Wholesale & retail | 2024 |
| Kapoor Trading Ltd | Wholesale & retail | 2019 |