| Abingworth Bioventures IV GP Limited | Financial services | 2003 |
| Abingworth Bioventures IV GP LP | | 2003 |
| Abingworth Bioventures V GP Limited | Financial services | 2006 |
| Abingworth Bioventures V GP LP | | 2006 |
| Abingworth Bioventures VI GP LP | | 2012 |
| Abingworth Bioventures VII GP LP | | 2016 |
| Abingworth CCD 2 General Partner LLP | | 2020 |
| Abingworth CCD General Partner LLP | | 2015 |
| Abingworth Clinical Co-Development Fund 2 GP LP | | 2020 |
| Abingworth Clinical Co-Development GP LP | | 2015 |
| Abingworth General Partner 8 LLP | | 2019 |
| Abingworth General Partner VI LLP | | 2012 |
| Abingworth General Partner VII LLP | | 2016 |
| Abiri's Medical Device Consulting LP | | 2025 |
| Abknet LP | | 2020 |
| Able Azure LP | | 2017 |
| Able Bathing Limited | Administrative & support | 2025 |
| Able Bridge Recruitment Limited | Administrative & support | 2019 |
| Able Building Services Limited | Construction | 2015 |
| Able People Development Limited | Professional & scientific | 2000 |
| Ablereus Limited | Wholesale & retail | 2019 |
| Ablk Limited | Other services | 2022 |
| Abney Capital LP | | 2013 |
| ABO Alnour Ltd | Wholesale & retail | 2025 |
| ABO Ayla for General Trading Ltd | Wholesale & retail | 2024 |
| Aboard the Boatels Limited | Hospitality | 2013 |
| Aboda Homes Ltd | Real estate | 2022 |
| Abolish Westminster Ltd | Other services | 2025 |
| Abondance Digitale LP | | 2022 |
| Above & Beyond Apartments Ltd | Construction | 2025 |
| Above and Beyond Property Specialists Ltd | Construction | 2017 |
| Above Sun LP | | 2014 |
| Aboveboard Homes Ltd | Households | 2019 |
| Abovethis LP | | 2022 |
| Aboyne Developments Limited | Other services | 2019 |
| Aboyne Investment Trading (Scotland) Partnership SP | | 2022 |
| Aboyne LP | | 2022 |
| Abph Investments Limited | Real estate | 2022 |
| ABR Catering Ltd | Hospitality | 2020 |
| ABR Hospitality Ltd | Financial services | 2024 |
| ABR Trader Ltd | Real estate | 2026 |
| Abra Cleandabra Limited | Administrative & support | 2022 |
| Abracio Trade LP | | 2014 |
| Abraham Prinxgrey Ltd | Wholesale & retail | 2018 |
| Abram Trade LP | | 2016 |
| Abraziv LP | | 2020 |
| Abrazza Corp LP | | 2018 |
| Abrdn (Cred II) GP Limited | Administrative & support | 2021 |
| Abrdn (General Partner Epgf) Limited | Financial services | 1999 |
| Abrdn (General Partner SCF I) Limited | Administrative & support | 2017 |
| Abrdn Alternative Holdings Limited | Administrative & support | 2008 |
| Abrdn Client Management Limited | Financial services | 1999 |
| Abrdn Commercial Real Estate Debt II LP | | 2021 |
| Abrdn Corporate Secretary Limited | Professional & scientific | 2017 |
| Abrdn Diversified Income and Growth PLC | Financial services | 1898 |
| Abrdn European Sustainable Infrastructure Partners Carry V LP | | 2024 |
| Abrdn Founder Co Limited | Financial services | 2021 |
| Abrdn Global Sustainable Infrastructure IV Carry LP | | 2024 |
| Abrdn Holdings Limited | Financial services | 1983 |
| Abrdn Investments Limited | Financial services | 1987 |
| Abrdn Oldco Limited | Hospitality | 2022 |
| Abrdn Portfolio Investments Limited | Financial services | 2009 |
| Abrdn Premises Services Limited | Administrative & support | 2007 |
| Abrdn Real Estate Operations Limited | Real estate | 1996 |
| Abrdn Secure Credit LP | | 2017 |
| Abrdn Trustee Company Limited | Administrative & support | 2018 |
| Abrevian Commerce and Development Ltd | Wholesale & retail | 2024 |
| Abrikos Corporation LP | | 2017 |
| Abrimar Limited | Agriculture & fishing | 2020 |
| Abrion Prom LP | | 2018 |
| ABS Offshore Services LP | | 2014 |
| Absa Cleaning Group Ltd | Administrative & support | 2025 |
| Abseil Ltd | Professional & scientific | 2022 |
| Abshrf Ltd | Wholesale & retail | 2025 |
| Absintermixas LP | | 2019 |
| Abslide Ltd. | Mining & quarrying | 2001 |
| Absolem HUE Ltd | Other services | 2024 |
| Absolut Group LP | | 2016 |
| Absolute Best Enterprises LP | | 2016 |
| Absolute Bravo LP | | 2017 |
| Absolute Business LP | | 2015 |
| Absolute Escapes Limited | Administrative & support | 2004 |
| Absolute Expert LP | | 2015 |
| Absolute Export LP | | 2015 |
| Absolute Heating & Cooling Ltd. | Manufacturing | 2022 |
| Absolute Live Ltd | Wholesale & retail | 2025 |
| Absolute Magic LP | | 2015 |
| Absolute Mark LP | | 2016 |
| Absolute Marketing Solutions LP | | 2017 |
| Absolute Partners LP | | 2015 |
| Absolute Perfect Business LP | | 2016 |
| Absolute Roofing Limited | Construction | 2016 |
| Absolute Share LP | | 2015 |
| Absolute Shipping & Trading Co LP | | 2019 |
| Absolute Success LP | | 2016 |
| Absolute Thai (Edinburgh) Limited | Hospitality | 2009 |
| Absolutelee Fabulous Limited | Administrative & support | 2025 |
| Absoukit Limited | Hospitality | 2025 |
| Abstract Electric Ltd | Construction | 2026 |
| Abstract Substrate Limited | Construction | 2025 |