| 'Tuoma Ltd | Health & social care | 2026 |
| (Two) CAN Design Limited | Professional & scientific | 1999 |
| 00261908 Limited | Manufacturing | 1932 |
| 00741078 Limited | Financial services | 1962 |
| 01848714 Limited | Professional & scientific | 1984 |
| 03440615 Limited | Wholesale & retail | 1997 |
| 1 in 6 Limited | Wholesale & retail | 2009 |
| 1 Oak Leisure Limited | Hospitality | 2011 |
| 10 Park Place West 2021 Ltd | Households | 2021 |
| 10 Southcliffe Management Limited | Real estate | 2018 |
| 101 Bradford Street Limited | Real estate | 2019 |
| 11 Belle VUE Crescent, Sunderland, Management Company Limited | Households | 2005 |
| 11-13, Woodside Management Company Limited | Households | 1977 |
| 11649209 Ltd. | Hospitality | 2018 |
| 13 Thornhill Park Sunderland Limited | Real estate | 2016 |
| 13TH Side Studio Ltd | Other services | 2026 |
| 1447 Limited | Real estate | 2022 |
| 149-150 Roker Avenue Property Management Company Limited | Real estate | 2009 |
| 15 & 16 Thornhill Gardens Management Limited | Households | 2026 |
| 18 and 20 the Briars Freehold Limited | Real estate | 2021 |
| 1879 Events Management Limited | Hospitality | 2011 |
| 19PPESR2 Limited | Hospitality | 2016 |
| 1ST Cloud Accountants Limited | Professional & scientific | 2011 |
| 1ST Cloud Limited | Extraterritorial | 2020 |
| 1ST Cloud Technology Ltd | Information & communication | 2008 |
| 1ST Financial Group Limited | Financial services | 2001 |
| 1ST Recycling Ltd | Water & waste | 2020 |
| 21 Eight Properties Ltd | Real estate | 2025 |
| 21 Social Ltd | Hospitality | 2025 |
| 234 Brockley Road Property Limited | Financial services | 2014 |
| 24 Upper Park Road Limited | Real estate | 2023 |
| 24NE Community Interest Company | Wholesale & retail | 2025 |
| 29 Stockton RD CIC | Arts & recreation | 2022 |
| 2CHURCHLANE Limited | Hospitality | 2017 |
| 2CTC Limited | Professional & scientific | 2026 |
| 2MPS Limited | Real estate | 2005 |
| 3/4 South Cliff Management Company Limited | Professional & scientific | 1988 |
| 30.06 Studios Ltd | Information & communication | 2010 |
| 31 Sea View Road (Sunderland) Limited | Households | 2019 |
| 3156 Athlete Management Limited | Arts & recreation | 2024 |
| 33COE.GLASS Jewellery Ltd | Manufacturing | 2024 |
| 345BENTONBURGER Ltd | Hospitality | 2024 |
| 35 Thornhill Gardens Management Company Limited | Real estate | 2007 |
| 360 Ecosphere Cleaning Solutions Limited | Administrative & support | 2026 |
| 3BZ Limited | Professional & scientific | 2026 |
| 3DPRINTCOMPANY Ltd | Manufacturing | 2025 |
| 3L Real Estate Ltd | Real estate | 2004 |
| 3NB North East Ltd | Real estate | 2019 |
| 41 Kong Investment Group Ltd | Professional & scientific | 2021 |
| 42PA Ltd | Construction | 2025 |
| 4APARTNERSHIP Limited | Hospitality | 2025 |
| 4B PE Holding Limited | Financial services | 2020 |
| 4B Precision Engineering Ltd | Professional & scientific | 2010 |
| 4EARTH Solutions (UK) Ltd. | Wholesale & retail | 2012 |
| 54DEGREESNORTHGAMING Ltd | Information & communication | 2020 |
| 5G Fibre Comms Ltd | Construction | 2024 |
| 5STAR Taxis Sunderland Limited | Transport & logistics | 2019 |
| 6 & 7 Southcliff Management Company Limited | Households | 1987 |
| 65 Voices Ltd | Real estate | 2018 |
| 87 Lets Limited | Real estate | 2013 |
| 9 the Elms Management Company Limited | Households | 2010 |
| 96 Sports Management Ltd | Arts & recreation | 2022 |
| 98TECH Ltd | Information & communication | 2023 |
| A & a Building NE Ltd | Real estate | 2022 |
| A & a Construction NE Ltd | Construction | 2021 |
| A & a Developments NE Ltd | Construction | 2022 |
| A & a Fabrications & Welding Limited | Manufacturing | 2008 |
| A & a Properties & Lettings Ltd | Real estate | 2020 |
| A & a Surveying Services Limited | Professional & scientific | 2022 |
| A & G Joyce Ltd | Agriculture & fishing | 2011 |
| A & J P Limited | Other services | 2024 |
| A & L Robson Properties Limited | Real estate | 2007 |
| A & M a Limited | Professional & scientific | 2011 |
| A & M Digi Home Solutions Limited | Construction | 2022 |
| A & M Pools Limited | Construction | 2016 |
| A & M Wakefield Associates Limited | Financial services | 2011 |
| A & S Property (NE) Limited | Real estate | 2020 |
| A Burrell Consulting Limited | Information & communication | 2016 |
| A Charlton Builders Limited | Construction | 2002 |
| A F Burdon Limited | Construction | 2024 |
| A Great Nothing Ltd | Arts & recreation | 2024 |
| A J Muir Accountancy Services Ltd | Professional & scientific | 2011 |
| A J Security NE Ltd | Administrative & support | 2021 |
| A Miller Property Company Limited | Real estate | 2014 |
| A Ncube Ltd | Health & social care | 2014 |
| A New ERA Limited | Administrative & support | 2023 |
| A P Development Group NE Ltd | Construction | 2025 |
| A P J Accounting & Commercial Support Service Ltd | Professional & scientific | 2012 |
| A R Properties (NE) Ltd | Real estate | 2024 |
| A U & Partners Ltd | Real estate | 2026 |
| A V Ocean Ltd | Hospitality | 2026 |
| A&A Fortis Group Ltd | Financial services | 2025 |
| A&A IT Networks Ltd | Information & communication | 2024 |
| A&B Inspection Services Limited | Professional & scientific | 2015 |
| A&Bp Limited | Professional & scientific | 2022 |
| A&D Vehicle Recycling Ltd | Wholesale & retail | 2025 |
| A&G Home Improvements (NE) Ltd | Construction | 2026 |
| A&H Developments (NE) Ltd | Real estate | 2025 |
| A&J PVT Limited | Real estate | 2025 |
| A&K House of Taste Ltd | Manufacturing | 2025 |