| 1101 Consulting Ltd | Health & social care | 2023 |
| 113-125 Northumberland Park Limited | Real estate | 2002 |
| 15 Cannon Place Limited | Administrative & support | 2005 |
| 17 Chesilton Road Management Limited | Households | 1997 |
| 180 Archway Road Management Company Limited | Real estate | 2004 |
| 2/4 Ovington Square Limited | Households | 1995 |
| 25 Bromfelde Limited | Households | 2009 |
| 2RGJ Ltd | Information & communication | 2023 |
| 30-32 Marsh Lane (Stanmore) Management Company Limited | Households | 1987 |
| 48 DE Parys Limited | Hospitality | 2026 |
| 7P'S Construction Ltd | Information & communication | 2022 |
| 8 K Limited | Information & communication | 2022 |
| 94 Gloucester Terrace Limited | Households | 2011 |
| A H Custom Decoration Ltd | Information & communication | 2023 |
| A Henderson Haulage Ltd | Construction | 2022 |
| A M Walker Film & TV Ltd | Information & communication | 2025 |
| A Q Productions Ltd | Information & communication | 2022 |
| AB Scenic Sets Ltd | Information & communication | 2022 |
| Abema Advisory and Consulting Ltd | Professional & scientific | 2024 |
| Academy Enterprises Ltd | Education | 2013 |
| Aceban Properties Ltd | Real estate | 2024 |
| Acorn Heights Property Limited | Financial services | 2025 |
| Action Carpentry Ltd | Construction | 2022 |
| ACW Plastering Ltd | Construction | 2021 |
| Addison Court Management Company Limited | Households | 1989 |
| AFS Financial Solutions Limited | Administrative & support | 2008 |
| AJR Scenery Ltd | Information & communication | 2015 |
| Akers Court (Waltham Cross) Management Company Limited | Households | 2006 |
| Akrs Services Ltd | Information & communication | 2023 |
| Alban Coaching Limited | Professional & scientific | 2013 |
| Albany Tree Care Limited | Administrative & support | 2014 |
| Alchemise Estate Charlie Ltd | Construction | 2024 |
| Alchemise Estates Alpha Ltd | Real estate | 2023 |
| Alchemise Estates Bravo Ltd | Real estate | 2023 |
| Alchemise Estates Ltd | Real estate | 2021 |
| Amberley Hall Management Company (N13) Limited | Households | 2002 |
| Amore Data Solutions Limited | Administrative & support | 2013 |
| AMS Rigging Ltd | Information & communication | 2022 |
| AN Systems Ltd | Information & communication | 2022 |
| Andrew Scott Consultancy Limited | Professional & scientific | 2010 |
| Annan Construction Limited | Administrative & support | 2019 |
| Annessa Roccamora LLP | | 2013 |
| Anthelion Developments Limited | Financial services | 2025 |
| Applied Pilates Ltd | Other services | 2021 |
| Appointed Properties Ltd | Real estate | 2024 |
| Aria Real Estate Limited | Real estate | 2023 |
| Arniya Properties Ltd | Real estate | 2024 |
| Artesian Grove Management Company Limited | Households | 1996 |
| Arthur Jack Trading Ltd | Wholesale & retail | 2023 |
| Asahi Juken Co Limited | | 1988 |
| ASH Design & Construction Limited | Manufacturing | 2009 |
| Ashfield Heights Residents Association Limited | Households | 1994 |
| Aspen Accommodation Ltd | Real estate | 2024 |
| Aston Demolition Limited | Construction | 2024 |
| Atheos Limited | Construction | 2016 |
| Aurora Five Ltd | Hospitality | 2023 |
| Aurora Four Ltd | Hospitality | 2023 |
| Aurora SIX Ltd | Hospitality | 2023 |
| Aurora Three Ltd | Hospitality | 2023 |
| Aurora UNO Ltd | Hospitality | 2023 |
| Azcoding Ltd | Information & communication | 2026 |
| B West Scenery Ltd | Information & communication | 2021 |
| B.Baker Carpentry Ltd | Information & communication | 2023 |
| Backstage Rigging Ltd | Manufacturing | 2014 |
| Barnet Foot Clinic Limited | Health & social care | 2016 |
| Barsby-Robinson Properties Ltd | Real estate | 2021 |
| Beauspoke Scenery Ltd | Information & communication | 2021 |
| Bedwecowen Limited | Construction | 2019 |
| Beech Financial Services Limited | Administrative & support | 2008 |
| Bellevarde Holdings Limited | Financial services | 2025 |
| Bey-Perrin Projects Ltd | Construction | 2025 |
| Bianchicleaning Ltd | Administrative & support | 2017 |
| Blue Light Leavers Ltd | Professional & scientific | 2018 |
| BMA Carpentry & Joinery Ltd | Construction | 2025 |
| Bmorris and SON Ltd | Construction | 2023 |
| Bohem Living Ltd | Real estate | 2018 |
| Bonne Dette Limited | Real estate | 2020 |
| Brand Champs Limited | Professional & scientific | 2016 |
| BRANDS2MARKET (UK) Limited | Professional & scientific | 2011 |
| Brewer Rigging Ltd | Construction | 2021 |
| Britnell Property Investments Ltd | Real estate | 2024 |
| Bromfelde Corner Ltd | Real estate | 2020 |
| Bron Scenic Solutions Ltd | Information & communication | 2023 |
| Brookeland Properties Ltd | Real estate | 2020 |
| Bubbly Bubbly Plastering Ltd | Construction | 2020 |
| Bubcait Developments Ltd | Construction | 2025 |
| Bubcait Limited | Real estate | 2020 |
| Buildn Ltd | Construction | 2023 |
| Bulb Fiction Ltd | Construction | 2021 |
| Bunns Lane Management Co. Limited | Households | 2001 |
| Butlers Lifting Operations Limited | Construction | 2015 |
| C S E Productions Ltd | Information & communication | 2012 |
| Camera Action Extras Ltd | Administrative & support | 2022 |
| Casacucina Trading Limited | Administrative & support | 2011 |
| Cassius Construction Trading Group Ltd | Construction | 2024 |
| CBD Rocks Ltd | Wholesale & retail | 2023 |
| CH12 Limited | Construction | 2014 |
| Chalgrave Manor Golf Club Limited | Arts & recreation | 1992 |
| Charlies Auto Services Ltd | Wholesale & retail | 2021 |
| Charterhouse Collective Ltd | Financial services | 2026 |