| 21 Milton Road Limited | Households | 2017 |
| 21 Theatre Limited | Arts & recreation | 2015 |
| 214 Queenstown Road Ltd | Households | 2003 |
| 22 Catharine Street Ltd | Real estate | 2022 |
| 220 Milton Road (Management Company) Limited | Households | 2021 |
| 22ND Century Consulting Ltd | Professional & scientific | 2019 |
| 23 & 25 Glenmere Close Management Company Limited | Households | 2017 |
| 23 Mowbray Road, Cambridge Limited | Households | 2016 |
| 23 Woodstock Road Management Company Limited | Households | 2020 |
| 23-25 Mortimer Street RTM Company Ltd | Households | 2016 |
| 23/25 Mortimer ST Management Co. Limited | Households | 1997 |
| 24 Inverness Terrace Limited | Households | 2006 |
| 24 Minford Gardens Ltd | Administrative & support | 2014 |
| 24-7 UNI Care Limited | Health & social care | 2024 |
| 249 Freehold Ltd | Real estate | 2017 |
| 24I Holdings Limited | Financial services | 2019 |
| 24I Unit Media Limited | Information & communication | 2004 |
| 25 Cambridge Place Ltd | Households | 2018 |
| 25 Rothsay Road Management Company Limited | Administrative & support | 1993 |
| 25 Tankerville Road London Limited | Real estate | 2003 |
| 259 City Road Management Co. Limited | Households | 2010 |
| 27 & 29 Queen Edith's Way Freehold Limited | Professional & scientific | 2012 |
| 27 Alexandra Grove Limited | Households | 2005 |
| 273 Hills Road Freehold Limited | Real estate | 1997 |
| 27FOUR (UK) Ltd | Financial services | 2024 |
| 28 North Discovery Limited | Professional & scientific | 2016 |
| 28 Stretton Road Freehold and Management Company Ltd | Households | 2020 |
| 2A & 2B Drayton Road Ltd | Administrative & support | 2010 |
| 2CMFY Ltd | Real estate | 2022 |
| 2CR Limited | Financial services | 2012 |
| 2D Cambridge Limited | Information & communication | 2016 |
| 2G Limited | Administrative & support | 2001 |
| 2GO2 Global Properties Limited | Real estate | 2019 |
| 2H Homes Ltd | Real estate | 2022 |
| 2KV Limited | Information & communication | 2016 |
| 2OW Ltd | Transport & logistics | 2017 |
| 2STREAM Solutions Ltd | Information & communication | 2019 |
| 2X4 Workshop Limited | Manufacturing | 2024 |
| 3 & 4 Station Square Management Company Limited | Households | 2018 |
| 3 & 4 Station Square RTM Company Limited | Extraterritorial | 2025 |
| 3 Arrows Recycling Solutions Ltd | Water & waste | 2019 |
| 3 Dimensions Limited | Construction | 2002 |
| 30 Halford Road Ltd | Real estate | 2026 |
| 31 Windermere Ltd | Professional & scientific | 2021 |
| 31-38 Ravensworth Gardens Limited | Real estate | 2004 |
| 317 Hills Road Limited | Real estate | 2018 |
| 317 Hills Road Management Company Limited | Households | 2018 |
| 318 Mill Road Ltd | Real estate | 2025 |
| 327 High Street Cottenham Limited | Real estate | 1993 |
| 32HEX Labs Ltd | Information & communication | 2024 |
| 33 Simpson Street Manchester (UK) Ltd | Real estate | 2022 |
| 33 ST. George's Square Tenants Association Limited | Households | 1994 |
| 333 Radical Limited | Wholesale & retail | 2012 |
| 34 Bateson Road Management Company Limited | Households | 2021 |
| 357 Financial Services Ltd | Professional & scientific | 2024 |
| 35E Limited | Professional & scientific | 2024 |
| 363 Fitness Limited | Arts & recreation | 2026 |
| 369 Professional Services Ltd | Professional & scientific | 2026 |
| 37 Clifton Road RTE Limited | Professional & scientific | 2010 |
| 37 Clinical Limited | Manufacturing | 2019 |
| 37A King Street Residents Limited | Households | 2020 |
| 38TIVITY Limited | Information & communication | 1990 |
| 3ANGRYMEN Productions Limited | Information & communication | 2011 |
| 3B Plant Hire Ltd | Administrative & support | 2024 |
| 3B Trading Ltd | Extraterritorial | 2023 |
| 3B Trading Worldwide Ltd | Wholesale & retail | 2019 |
| 3D and 3RS Ltd | Administrative & support | 2023 |
| 3D CAD CAM CNC Ltd | Manufacturing | 2025 |
| 3D Matters Limited | Manufacturing | 2002 |
| 3D Minds Creations Ltd | Manufacturing | 2026 |
| 3D Pioneers Limited | Manufacturing | 2024 |
| 3D Vector Electric Limited | Manufacturing | 2022 |
| 3DI Design & Construction Ltd | Manufacturing | 2024 |
| 3DS Financial Services Ltd | Financial services | 2015 |
| 3GA Limited | Wholesale & retail | 2002 |
| 3N Dark Composite Ltd | Manufacturing | 2023 |
| 3T Software Labs Group Limited | Information & communication | 2016 |
| 3T Software Labs Limited | Information & communication | 2016 |
| 3W Medhealth Ltd | Health & social care | 2025 |
| 3YE Trading Co., Ltd | Manufacturing | 2020 |
| 4 Little People Ltd | Wholesale & retail | 2010 |
| 40 Spalding Way Management Company Limited | Households | 2017 |
| 41 Abbey Road Limited | Real estate | 2011 |
| 41 Fairhazel Gardens Limited | Households | 2012 |
| 41 ST Augustines Freehold Limited | Households | 2010 |
| 4155 Ltd. | Wholesale & retail | 2021 |
| 42 Technology Group Limited | Professional & scientific | 2019 |
| 42 Technology Limited | Professional & scientific | 2001 |
| 45 Marshall Road (Cambridge) Ltd | Real estate | 2025 |
| 451 DEA Limited | Professional & scientific | 2017 |
| 46 High Street (Great Dunmow) Management Company Limited | Households | 2012 |
| 48SC Ltd | Real estate | 2023 |
| 49 Alpha Road Freehold Ltd | Households | 2017 |
| 49 Alpha Road RTM Company Ltd | Households | 2011 |
| 49 Red Ltd | Wholesale & retail | 2020 |
| 4B Holdings Ltd | Real estate | 2020 |
| 4BASEBIO Discovery Limited | Professional & scientific | 2020 |
| 4BASEBIO UK Ltd | Manufacturing | 2019 |
| 4C Media Limited | Professional & scientific | 2018 |
| 4CAMBRIDGE Limited | Information & communication | 2016 |