| "K" Laundry Limited | Other services | 1927 |
| 12 Communications Limited | Professional & scientific | 2025 |
| 17 Bedford Road Management Limited | Hospitality | 2015 |
| 1A & 1B Richmond Place Management Company Limited | Households | 2023 |
| 2 Carbis Water Management Ltd | Real estate | 2013 |
| 2 Point 4 Limited | Wholesale & retail | 2022 |
| 22 Ingram Street Management Company Limited | Real estate | 2005 |
| 247 Munchies Ltd | Hospitality | 2021 |
| 24HR Business Plan Ltd | Professional & scientific | 2025 |
| 2B Graphic Design Limited | Administrative & support | 2006 |
| 2BLU Ltd | Administrative & support | 2025 |
| 2BOB Bars Ltd | Hospitality | 2025 |
| 2I Design Limited | Professional & scientific | 2001 |
| 360 Commercial Properties Limited | Real estate | 2015 |
| 360 Holdings Group (UK) Limited | Information & communication | 2021 |
| 360COMS Limited | Information & communication | 1991 |
| 41 Bedford Road (ST. Ives) Limited | Real estate | 2000 |
| 418 Developments Limited | Construction | 2016 |
| 47HOLDINGS Limited | Financial services | 2026 |
| 47PROPERTY Investments Limited | Real estate | 2026 |
| 47TRADING Limited | Financial services | 2026 |
| 4D Monitoring Limited | Professional & scientific | 2015 |
| 4P Management Ltd | Professional & scientific | 2020 |
| 604556969 Ltd | Transport & logistics | 2018 |
| 66/67 Ermine Street Management Company Limited | Real estate | 2000 |
| 786 Car Sales Ltd | Wholesale & retail | 2020 |
| A J Contracts Limited | Construction | 2025 |
| A J Folkmanis Limited | Financial services | 2001 |
| A Splinter of Hope CIC | Arts & recreation | 2023 |
| A Starr Services Limited | Extraterritorial | 2008 |
| A&C Investments and Development Limited | Real estate | 2024 |
| A. Fielding Ltd | Administrative & support | 2008 |
| A. S. H. (Cambs) Ltd | Construction | 2018 |
| A1 Private Hire (Cambs) Limited | Transport & logistics | 2003 |
| AA Holdings 1957 Limited | Financial services | 2022 |
| AB Performance Coaching Ltd | Professional & scientific | 2025 |
| Abberley House Nursery Limited | Health & social care | 2022 |
| Abbey Gate Holdings Limited | Financial services | 2021 |
| ABC Nightliners Limited | Transport & logistics | 2023 |
| Ablestead Limited | Administrative & support | 2009 |
| Absolute Decals Ltd | Manufacturing | 2020 |
| Absolute Wraps Limited | Administrative & support | 2013 |
| ACCOUNTS2INFO Limited | Professional & scientific | 2023 |
| Acexperto Limited | Information & communication | 2022 |
| Acorn Labels Holdings Limited | Financial services | 2007 |
| Acorn Labels Limited | Manufacturing | 1994 |
| Acorns Group Ltd | Real estate | 2022 |
| Acpd Services Ltd | Professional & scientific | 2017 |
| ACW Kitchens and Bathrooms Ltd | Construction | 2011 |
| Addison Arms Limited | Hospitality | 2017 |
| Adke (BR) Limited | Construction | 2025 |
| Adke (MP) Limited | Real estate | 2025 |
| Adke Limited | Construction | 2012 |
| Adke MGT Limited | Real estate | 2025 |
| Adke Properties (MP) Limited | Real estate | 2025 |
| Adke Topco Limited | Financial services | 2025 |
| ADM Car Limited | Transport & logistics | 2021 |
| ADM Software Consulting Limited | Information & communication | 2017 |
| Adorn Ltd | Wholesale & retail | 2021 |
| Advanced Integrated Technologies Limited | Manufacturing | 2024 |
| Advantos Services Limited | Construction | 2012 |
| Aero Engine Finance LLP | | 2012 |
| Aero Engine Invest Limited | Wholesale & retail | 2011 |
| AES Americas Limited | Professional & scientific | 2011 |
| AES Building Services Ltd | Construction | 2023 |
| AES Energy Solutions Ltd | Construction | 2022 |
| AES Group (Cambs) Ltd | Construction | 2021 |
| Aether Zenith Limited | Manufacturing | 2024 |
| AFP General Solutions UK Ltd | Public administration | 2017 |
| Afterway Developments Limited | Construction | 2011 |
| Agat Enterprise Ltd | Transport & logistics | 2023 |
| AGS Decorating and Refurbishment Services Limited | Construction | 2018 |
| AI Pharma Consulting Limited | Health & social care | 2019 |
| AI T3CH Limited | Manufacturing | 2024 |
| AIM Content Marketing and Public Relations Limited | Professional & scientific | 2017 |
| Aimal (Accountants) Limited | Professional & scientific | 2009 |
| Aircraft Quality Services Limited | Manufacturing | 2005 |
| Airtex UK Limited | Administrative & support | 2026 |
| Airway Air Conditioning Limited | Construction | 1996 |
| Airway Group Limited | Financial services | 2012 |
| Airway Heat Pumps Limited | Construction | 2022 |
| Airworthy Consulting Ltd | Professional & scientific | 2024 |
| AJ Stocks Ltd | Wholesale & retail | 2026 |
| AK Sportscars Limited | Manufacturing | 2010 |
| AL Majid Properties Limited | Real estate | 2025 |
| Albc (Cambs) Limited | Construction | 2020 |
| Alexanders Removals Ltd | Transport & logistics | 2025 |
| Alfred Trading and Holdings Limited | Wholesale & retail | 2025 |
| Alimatic Architectural Aluminium Systems Limited | Manufacturing | 2011 |
| Allen and Edwards Consulting Ltd. | Information & communication | 2014 |
| Allez Allez Cycling Ltd. | Hospitality | 2021 |
| Allgood Agricultural Contractors Ltd | Agriculture & fishing | 2022 |
| Allyearbooks Limited | Information & communication | 2004 |
| Alpha Mine Ltd | Information & communication | 2017 |
| Alphabet Day Nursery School Limited | Education | 2015 |
| Alphametrics Ltd | Professional & scientific | 1983 |
| Alsacia Ltd | Real estate | 2024 |
| ALX Technologies Ltd. | Information & communication | 2016 |
| Alyn Thompson Electrial Services Limited | Construction | 2012 |
| AM (Wallington) Limited | Real estate | 2016 |