| Millbry Hill Cafes Limited | Hospitality | 2021 |
| Millbry Hill Limited | Wholesale & retail | 2020 |
| Millbry Hill Stud Limited | Agriculture & fishing | 2020 |
| Millennium Power (UK) Limited | Professional & scientific | 2016 |
| National Civils and Utilities Limited | Construction | 2019 |
| National Modular Installs Ltd | Construction | 2024 |
| North East Energy Solutions Ltd | Administrative & support | 2025 |
| North Yorkshire Physiotherapy Ltd | Health & social care | 2013 |
| Nostromo Asset Management Limited | Administrative & support | 2018 |
| NW Biogas Investco 2024 Limited | Energy | 2019 |
| Oldroyd Musical Instruments Ltd | Manufacturing | 2024 |
| P Three People Places Property Ltd | Real estate | 2019 |
| P.C.Richardson & Co.(Middlesbrough),Limited | Construction | 1924 |
| Partington Estates Limited | Real estate | 2020 |
| Partington Estates NO.1 Limited | Real estate | 2021 |
| Popcorn Catering Limited | Hospitality | 2024 |
| Popcorn Limited | Hospitality | 1998 |
| Pro-Cess NE Limited | Professional & scientific | 2021 |
| Proportion Marketing Limited | Information & communication | 2007 |
| Prospect Pharma Ltd | Health & social care | 2017 |
| Quigley & Partners Limited | Financial services | 2010 |
| R D Alderson Limited | Agriculture & fishing | 2014 |
| Readman Storage Limited | Transport & logistics | 2012 |
| Redcar and Cleveland Training Centre Ltd | Administrative & support | 2010 |
| RLC Global LLP | | 2012 |
| Rooms Exclusive Housekeeping Limited | Administrative & support | 1997 |
| Roseberry Coffee Ltd | Wholesale & retail | 2018 |
| Roseberry Home Help Ltd | Health & social care | 2026 |
| Rowans Quality Services Limited | Professional & scientific | 2013 |
| S & a Inspection Services Ltd | Professional & scientific | 2023 |
| Silent Monk Infosys Ltd | Information & communication | 2023 |
| Silver Beacon Limited | Financial services | 2026 |
| Simo Publishing Limited | Professional & scientific | 2024 |
| Slcl Services Ltd | Administrative & support | 2012 |
| Speight Builders LLP | | 2011 |
| Stanley Grange Limited | Agriculture & fishing | 2020 |
| Stapleton and Stapleton Limited | Professional & scientific | 2014 |
| Steel River Financial Limited | Financial services | 2017 |
| Sterling GP Holdings Ltd | Financial services | 2019 |
| Sterling GP Limited | Manufacturing | 2013 |
| Stirling Green Hydrogen Limited | Manufacturing | 2021 |
| Stokesley Car Centre Ltd | Wholesale & retail | 2016 |
| Stokesley Deli Limited | Hospitality | 2008 |
| Stokesley Hardware Co. Limited | Real estate | 1978 |
| Stokesley Rentals Limited | Real estate | 2021 |
| Stokesly Restaurant Limited | Hospitality | 2025 |
| Stonewall Leisure Ltd | Manufacturing | 2019 |
| Tanton Industries Limited | Professional & scientific | 2014 |
| Tea UP Ltd | Hospitality | 2019 |
| THE Wainstones Hotel Ltd | Hospitality | 2023 |
| Thompson Machine Tools Limited | Transport & logistics | 1951 |
| Threemindsonebody Ltd | Health & social care | 2014 |
| Tilly Smart Limited | Real estate | 2020 |
| TIM Brown & SON Ltd | Wholesale & retail | 2012 |
| TIM Jopling-True Potential Wealth Management Partners LLP | | 2006 |
| Trafford Energy Storage Limited | Energy | 2021 |
| Tripsdale Technology Ltd | Professional & scientific | 2010 |
| Trustinsure Limited | Financial services | 2020 |
| Trustlaw Developments Limited | Professional & scientific | 2001 |
| Trustlaw Financial Services Limited | Financial services | 2001 |
| Trustlaw Limited | Professional & scientific | 2001 |
| Trustretire Limited | Professional & scientific | 2004 |
| Trustsearch Limited | Extraterritorial | 2011 |
| Tyrekey Limited | Manufacturing | 2017 |
| Wainstones Estates (River DEE) Limited | Hospitality | 2023 |
| Waterseal (Waterbar & Sealants) Limited | Construction | 1980 |
| Waterseal Holdings Limited | Construction | 2011 |
| Wentworth Group Holdings Ltd | Financial services | 2023 |
| White Rock Investment Partners Limited | Financial services | 2018 |
| White Rose Taxis 2000 Ltd | Transport & logistics | 2015 |
| Whitebox Solutions (NE) Ltd | Construction | 2026 |
| Whitebox Solutions Ltd | Construction | 2025 |
| Wigan Green Hydrogen Limited | Manufacturing | 2023 |
| Wight Farm Energy Services Limited | Energy | 2018 |
| Worldwide Sales (Global) Ltd | Wholesale & retail | 2025 |
| Zestlife Ltd | Wholesale & retail | 2012 |