| 104 Huntingdon Road Limited | Households | 2001 |
| 3D Solid Designs Limited | Professional & scientific | 1982 |
| 81 High Street Chesterton Management Company Ltd | Real estate | 2005 |
| A & B Taxis Limited | Transport & logistics | 2003 |
| A J Cobb Body Repair Centre Limited | Wholesale & retail | 2024 |
| A L M Partitioning Limited | Construction | 2006 |
| A L M S Limited | Professional & scientific | 2006 |
| A. 1. Profiling Limited | Professional & scientific | 1986 |
| A. Edgley Limited | Agriculture & fishing | 2003 |
| A.E. & E.A. Hudson Limited | Construction | 2003 |
| A.L.S. Autos Limited | Wholesale & retail | 2007 |
| Abacus Accounts Limited | Professional & scientific | 1994 |
| Abbeygrove Limited | Real estate | 1995 |
| Abington Farms Limited | Agriculture & fishing | 1948 |
| Absolute Concepts Limited | Information & communication | 2003 |
| AC Architects Cambridge Limited | Professional & scientific | 2000 |
| Acacia Tree Surgery Ltd | Agriculture & fishing | 2006 |
| Academy Forklift (Holdings) Limited | Administrative & support | 1984 |
| Accessart | Education | 2004 |
| Acoustical Control Engineers Limited | Professional & scientific | 1972 |
| Action Office UK Ltd | Administrative & support | 2000 |
| Activeclean Ltd | Professional & scientific | 2005 |
| Adams, Cook & Pearce Limited | Wholesale & retail | 1991 |
| Advanced Risc Machines Limited | Professional & scientific | 1998 |
| AFC Cambridge Ltd | Arts & recreation | 2006 |
| AGE Concern Peterborough | Other services | 2000 |
| Aggrico Group Ltd | Agriculture & fishing | 2020 |
| Ai:Design Labs Limited | Manufacturing | 2004 |
| AIG Accounting Solutions Limited | Professional & scientific | 1999 |
| AIM Instruments Limited | Manufacturing | 1999 |
| Aitchison Fine Violins Limited | Manufacturing | 1999 |
| Akmal Cabs Ltd | Transport & logistics | 2018 |
| Akmal Travels Ltd | Administrative & support | 2018 |
| Alasdair Cant & Associates Limited | Professional & scientific | 2005 |
| Alfred Harrold (Containers) Limited | Other services | 1980 |
| Aligned Agility Limited | Professional & scientific | 2001 |
| Amanas Music Limited | Arts & recreation | 2000 |
| Amber UK Trading Ltd | Wholesale & retail | 2025 |
| Amdeo Limited | Information & communication | 2007 |
| Amer Investments LLP | | 2007 |
| AMP Maker Limited | Manufacturing | 2011 |
| Andrew Webster Limited | Professional & scientific | 2002 |
| Anglia Court Hotel Limited | Hospitality | 2006 |
| Anglia Translations Limited | Administrative & support | 2003 |
| Anthias Consulting Limited | Professional & scientific | 2005 |
| Apex Estate Management Limited | Real estate | 2024 |
| Aphena Limited | Information & communication | 2003 |
| Arch Manufacturing Company Limited | Extraterritorial | 1981 |
| Argo Analytics Ltd | Information & communication | 2007 |
| Argriy Holdings Limited | Wholesale & retail | 2025 |
| ARM Limited | Administrative & support | 1990 |
| Artco Limited | Real estate | 1998 |
| Artco Residential Ltd | Real estate | 2003 |
| Askew & Barrett (Pulses) Limited | Wholesale & retail | 1982 |
| Athena Strategy and Operations Consulting Limited | Professional & scientific | 2015 |
| Audicus Limited | Information & communication | 2007 |
| Author Unlimited | Information & communication | 2003 |
| AWA 136 Limited | Professional & scientific | 2002 |
| Awakenjoy Ltd | Manufacturing | 2021 |
| Awen ETC Ltd | Extraterritorial | 2022 |
| Axiom-E Limited | Professional & scientific | 2001 |
| B & H Property (Cambridge) Limited | Real estate | 2005 |
| B2 IT (Cambridge) Ltd. | Information & communication | 2006 |
| Baby PIG Limited | Real estate | 2001 |
| Baby-Time Ltd | Arts & recreation | 1999 |
| Baker Street Studios Limited | Information & communication | 2004 |
| Bakewell Foods Limited | Manufacturing | 1990 |
| Banhams Close Residents Association Limited | Households | 1975 |
| Barr Ellison LLP | | 2006 |
| Barway Services Limited | Agriculture & fishing | 2005 |
| Bates Harvey & Lester | | 1997 |
| Bearings & Drives (2004) Limited | Manufacturing | 2004 |
| Believe Personal Training Limited | Extraterritorial | 2022 |
| Bentley Restaurants Limited | Hospitality | 1963 |
| Best Car Finder Group Ltd | Administrative & support | 2017 |
| Big Star Glazing Ltd | Manufacturing | 2022 |
| Bigfoot Productions UK Limited | Arts & recreation | 1996 |
| Biospring Limited | Professional & scientific | 2000 |
| Blackcat Creative Media Limited | Administrative & support | 2006 |
| BLT Beds Limited | Wholesale & retail | 1998 |
| Bluecrag Limited | Information & communication | 2004 |
| BOB Hopper & Co Ltd. | Wholesale & retail | 2000 |
| Boffin Technology Limited | Information & communication | 1994 |
| Boxworth Farming Co.Limited | Agriculture & fishing | 1941 |
| Bravurabooks Limited | Information & communication | 2019 |
| Brian Morley (Horseboxes) Limited | Wholesale & retail | 2007 |
| Brick Builds Limited | Real estate | 2019 |
| Brickwork Residents Association RTM Company Limited | Water & waste | 2005 |
| Bridge END Garage (Somersham) Limited | Administrative & support | 1971 |
| Broadview Developments Limited | Construction | 2000 |
| Bunny Guinness Landscape Design Limited | Professional & scientific | 2002 |
| Burdock Limited | Wholesale & retail | 1999 |
| Business Literacy Limited | Professional & scientific | 2003 |
| C J B Commissioning Services Limited | Professional & scientific | 2000 |
| C&S Staffing Solutions Limited | Administrative & support | 2025 |
| Cambridge Consultation Services Ltd | Wholesale & retail | 2020 |
| Cambridge DSP Limited | Professional & scientific | 2005 |
| Cambridge Economic Associates Limited | Professional & scientific | 1999 |
| Cambridge Funds Investment Co Limited | Wholesale & retail | 2006 |
| Cambridge GAS Services Ltd | Construction | 2005 |