| Acquisition Holdings Limited | London | 2023 |
| Acquisition Wealth Management Limited | Northampton | 2017 |
| Acquisitions Advisory Limited | London | 2025 |
| Acquist Data Holdings Limited | Fleet | 2022 |
| Acquist Limited | Newbury | 2013 |
| Acquma Life Ltd | Northwich | 2017 |
| Acqwaste Limited | London | 2023 |
| Acqwhiz Ltd | London | 2023 |
| ACR | London | 1970 |
| ACR Alpine Capital Research UK Limited | London | 2021 |
| ACR III NI RE Holding Ltd. | London | 2024 |
| ACR III NI RE Mezzanine Ltd. | London | 2024 |
| ACR UK Holdings Ltd | Margate | 2012 |
| Acra Investment Holdings Limited | Solihull | 2025 |
| Acrd Consultants Limited | Eastbourne | 2021 |
| Acre 1219 Limited | Borehamwood | 2019 |
| Acre 1220 Limited | Harrow | 2019 |
| Acre 1228 Limited | London | 2025 |
| Acre Art Limited | Tunbridge Wells | 2024 |
| Acre Bond Ltd | London | 2018 |
| Acre Capital Limited | London | 2018 |
| Acre Corporation EOT Limited | Johnstone | 2024 |
| Acre Creative Holdings Limited | London | 2016 |
| Acre Data Services Ltd | Tonbridge | 1998 |
| Acre Enterprises Limited | Taunton | 2020 |
| Acre GL Mountain (Sunset) Limited | Borehamwood | 2016 |
| Acre Hill Property Ltd | Rye | 2024 |
| Acre Hospitality Holdings Ltd | Harrow | 2026 |
| Acre Lane Capital Ltd | London | 2018 |
| Acre Lane Funding 1 Ltd | London | 2018 |
| Acre Lane Funding 3 Ltd | London | 2020 |
| Acre London Group Ltd | Barnet | 2022 |
| Acre Mortgages Limited | Horsham | 2024 |
| Acre PAY Limited | Wokingham | 2019 |
| Acreclose Limited | Tetbury | 2014 |
| Acreedor Ltd | London | 2024 |
| Acremaster Limited | London | 1975 |
| Acreon Investments Limited | London | 2019 |
| Acreplan Finance Ltd | Barnet | 2016 |
| Acres Cover Limited | Rushden | 2023 |
| Acres Financial Services Limited | Sutton Coldfield | 2021 |
| Acres Hill Holdings (SY) Ltd | Rotherham | 2026 |
| Acres Insurance Brokers Ltd | Rushden | 2018 |
| Acres Investments Limited | Rushden | 2025 |
| Acres South Ltd | Rushden | 2019 |
| Acresexchange Limited | London | 2024 |
| Acrevale Group Limited | Cardiff | 2025 |
| Acrew Holdings Limited | Bedford | 2018 |
| Acrisure Eleven Network Limited | London | 2004 |
| Acrisure International Holdings Limited | London | 2019 |
| Acrisure London Wholesale Limited | London | 2019 |
| Acrisure RE Corporate Advisory & Solutions Limited | London | 2021 |
| Acrisure RE Holdings Limited | London | 2014 |
| Acrisure RE International Facultative Limited | London | 2021 |
| Acrisure RE UK Limited | London | 2017 |
| Acrisure UK Broking Limited | London | 1955 |
| Acrisure UK Holdings Limited | London | 2022 |
| Acrisure UK MGA Holdings Limited | London | 2022 |
| Acrisure UK MGA Limited | London | 2015 |
| Acrisure UK Retail Limited | London | 2022 |
| Acrisure UK Services Limited | London | 2024 |
| Acrity Investments Limited | Northampton | 2023 |
| Acrivarn Group Holdings Limited | Leeds | 2024 |
| Acrivarn Holdings Limited | Saltaire | 2012 |
| Acro Azul Ltd | Coulsdon | 2025 |
| Acrobat Trustees Ltd | Wimborne | 2024 |
| Acroft Holdings Ltd | London | 2026 |
| Acrom Group Limited | Grimsby | 2024 |
| Acrom Holdings Limited | North East Lincolnshire | 2000 |
| Acron Aviation Academy UK Limited | Altrincham | 2015 |
| Acron Aviation Group Limited | Altrincham | 2021 |
| Acron Aviation Holdings Limited | Altrincham | 2020 |
| Acron Aviation Limited | Altrincham | 2020 |
| Acronim Holdings Ltd | Kent | 2024 |
| Acronym Biosciences Ltd | Cardiff | 2018 |
| Acronym International Ltd | London | 2015 |
| Acropolis Holdings Ltd | London | 2021 |
| Acropro Ltd | London | 2023 |
| Acros Capital Management Limited | Bromley | 2024 |
| Across the Market Mortgages Limited | Southampton | 2019 |
| Acrown Limited | Wigan | 2010 |
| Acru Manufacturing Limited | Cheadle | 2025 |
| Acrux Gold Investco Limited | Cobham | 2025 |
| Acrux Gold Limited | Cobham | 2025 |
| Acrux Resources (UK) Limited | Surbiton | 2023 |
| ACS BP Holdings Limited | Leeds | 2018 |
| ACS Capital Holdings Ltd | London | 2024 |
| ACS Capital Ltd | London | 2024 |
| ACS Claims Limited | Enniskillen | 2016 |
| ACS Corporation Holdings Limited | Cheadle Hulme | 2024 |
| ACS Equity Group Limited | Manchester | 2025 |
| ACS Facades Holdings Limited | Leeds | 2019 |
| ACS Financial Planning Limited | Sutton Coldfield | 2011 |
| ACS Global Advisors Ltd | London | 2015 |
| ACS Group Holdings Limited | Stockport | 2008 |
| ACS Holdings (Hull) Limited | Cottingham | 2017 |
| ACS Holdings NW Ltd | Liverpool | 2025 |
| ACS International Schools Overseas Holdings Limited | London | 2011 |
| ACS Investment Holdings Limited | Pinner | 2023 |
| ACS Investments NW Limited | Cheadle Hulme | 2026 |