| ABC Trade Ltd. | Administrative & support | 2012 |
| Abdul Islam Properties Limited | Real estate | 2026 |
| Abdulahmad Ltd | Wholesale & retail | 2024 |
| Abdullah Hotel and Restaurant Limited | Hospitality | 2023 |
| Abel Surveying Ltd | Professional & scientific | 2025 |
| ABH Facilities Ltd | Wholesale & retail | 2024 |
| Abitech Ltd | Wholesale & retail | 2016 |
| Able Group Limited | Manufacturing | 2016 |
| Ableconstructiongroup Ltd | Construction | 2022 |
| ABM Car Sales Ltd | Wholesale & retail | 2026 |
| Abmp Architectural Engineers Ltd | Professional & scientific | 2021 |
| Abominable Snowman Limited | Information & communication | 2013 |
| Above ALL Events Ltd | Other services | 2024 |
| ABR Family Properties Ltd | Households | 2025 |
| Abraham & Jaqub Limited | Real estate | 2021 |
| Abraham Progressive Club Ltd | Construction | 2024 |
| Abram Logistics Limited | Transport & logistics | 2007 |
| Abrix Building Services Ltd | Construction | 2026 |
| ABS Properties Limited | Real estate | 2014 |
| ABS Property Solutions Ltd | Extraterritorial | 2024 |
| ABS Sparx Ltd | Wholesale & retail | 2024 |
| Absolute Advantage FM Limited | Wholesale & retail | 2015 |
| Absolute Build Associates Limited | Other services | 2010 |
| Absolute Clean Group Limited | Administrative & support | 2024 |
| Absolute Developments Gtoup Ltd | Construction | 2023 |
| Absolute Estimating Solutions Limited | Administrative & support | 2010 |
| Absolute Homecare Services Ltd | Wholesale & retail | 2016 |
| Absolute Silver Ltd | Wholesale & retail | 2023 |
| Abstract Mechanical and Electrical Services Ltd | Construction | 2011 |
| ABT Express Limited | Transport & logistics | 2025 |
| ABZ Stockport Ltd | Hospitality | 2026 |
| ABZ Sweets Ltd | Wholesale & retail | 2025 |
| Abzan Renewables Ltd | Manufacturing | 2024 |
| Abztradinguk Ltd | Wholesale & retail | 2022 |
| AC Decorators Oldham Ltd | Construction | 2025 |
| AC Lighting Consultant Ltd | Wholesale & retail | 2025 |
| ACA Management Ltd | Arts & recreation | 2025 |
| Academy Football UK Limited | Education | 2021 |
| Academy of Science Technology and Management Ltd. | Education | 2009 |
| Academy Property Management Limited | Households | 2025 |
| Acavs Manchester Limited | Construction | 2020 |
| Accelerate Growth Ltd | Information & communication | 2023 |
| Accelobrand Ltd | Wholesale & retail | 2017 |
| Access Solar Solutions Ltd | Construction | 2011 |
| Accommodating Property Investments Ltd | Real estate | 2019 |
| Accord Housing & Care Ltd | Health & social care | 2023 |
| Accountancy Works (NW) Ltd | Professional & scientific | 2011 |
| Accountax Advisory Services Limited | Professional & scientific | 2013 |
| Accountingandtax Ltd | Professional & scientific | 2024 |
| Accounts in Context Ltd | Professional & scientific | 2011 |
| Accox Limited | Information & communication | 2010 |
| Accutax Limited | Professional & scientific | 2011 |
| Ace Risk Management Solutions Ltd | Administrative & support | 2022 |
| Ace Trading Group Ltd | Hospitality | 2025 |
| Ace Vehicle Hire Limited | Other services | 2021 |
| Acelle Ltd | Financial services | 2020 |
| Acenflows Ltd | Health & social care | 2025 |
| Acerville Sparks Limited | Wholesale & retail | 2015 |
| Acethetix Ltd | Education | 2020 |
| Acevision Developments Ltd | Construction | 2025 |
| ACG Electric Avenue Ltd | Real estate | 2019 |
| ACG Fire Protection Limited | Public administration | 2021 |
| ACH Property Group Ltd | Real estate | 2026 |
| ACH Publishing Limited | Information & communication | 2014 |
| Achal Consultancy Ltd | Professional & scientific | 2013 |
| Achieve Financial Limited | Financial services | 2020 |
| Achilles Meze Bar and Grill Limited | Hospitality | 2018 |
| Acorn Associates Limited | Administrative & support | 2025 |
| Acorn Brokerage Limited | Wholesale & retail | 2011 |
| Acorn Cladding Services Limited | Construction | 2012 |
| Acorn House (Fostering Services) Limited | Health & social care | 2007 |
| Acorn Implant & Dental Practice Ltd | Health & social care | 2010 |
| Acorn West Ltd | Administrative & support | 2022 |
| Acoustic Interior Solutions Limited | Construction | 2024 |
| ACQ Mobile Valeting Ltd | Wholesale & retail | 2006 |
| Across the Bay Ltd | Health & social care | 2019 |
| Acrylic Hub Ltd | Manufacturing | 2024 |
| Activ 1 Limited | Real estate | 2018 |
| Active 365 Group Limited | Manufacturing | 2023 |
| Active Alignment Ltd | Arts & recreation | 2025 |
| Active Motor Sales Ltd | Wholesale & retail | 2026 |
| Active Repairs Ltd | Wholesale & retail | 2023 |
| ACTIVE8 Consulting Ltd | Professional & scientific | 2025 |
| Acuity Direct Ltd | Health & social care | 2022 |
| Acumen Financial Advisers Limited | Financial services | 2012 |
| Acumen Independent Financial Advisers Limited | Financial services | 1999 |
| Acumen Pensions and Investments Limited | Financial services | 2019 |
| Acumen Synergy Limited | Information & communication | 2012 |
| Acumen System Solutions Ltd | Information & communication | 2012 |
| ACW Advisory Ltd | Professional & scientific | 2016 |
| Acwin Ltd | Wholesale & retail | 2016 |
| Acylprime Ltd | Wholesale & retail | 2023 |
| Adaa Aesthetics Limited | Other services | 2025 |
| Adaab Knitwear Ltd | Manufacturing | 2024 |
| Adam ALI Catering Limited | Hospitality | 2025 |
| Adam Associates (UK) Limited | Professional & scientific | 2011 |
| Adam Holding Union Ltd | Administrative & support | 2025 |
| Adam International Academy Ltd | Education | 2026 |
| Adam Scott Property Limited | Real estate | 2025 |
| Adam's Attic Limited | Wholesale & retail | 2019 |