| Wynd Barbers Yarm Ltd | Other services | 2025 |
| Yarm Bowling Club Community Interest Company | Health & social care | 2024 |
| Yarm Builders Limited | Construction | 2019 |
| Yarm Building Solutions Limited | Construction | 2023 |
| Yarm Business Forum Friends CIC | Administrative & support | 2019 |
| Yarm Driving Range Ltd | Arts & recreation | 2023 |
| Yarm DRY Cleaners Limited | Other services | 2018 |
| Yarm Engineering Resources Ltd. | Construction | 2010 |
| Yarm Exteriors Ltd | Construction | 2024 |
| Yarm Gardening & Pond Care Ltd | Administrative & support | 2025 |
| Yarm Lets Ltd | Professional & scientific | 2025 |
| Yarm Nails Ltd | Other services | 2019 |
| Yarm Paddle Boarding Ltd | Arts & recreation | 2024 |
| Yarm Podiatry and Physiotherapy Ltd | Health & social care | 2025 |
| Yarm Project Services Ltd. | Construction | 2010 |
| Yarm Property Developments Ltd | Real estate | 2025 |
| Yarm Property Services Ltd | Real estate | 2021 |
| Yarm School | Education | 2002 |
| Yarm School Nurseries Limited | Education | 2026 |
| Yarm Squash Club Limited | Arts & recreation | 2024 |
| Yarmonbt Ltd | Wholesale & retail | 2026 |
| YDR Entertainment Ltd | Arts & recreation | 2023 |
| YDR Golf Ltd | Arts & recreation | 2024 |
| YDR One Limited | Arts & recreation | 2022 |
| YDR Ventures Limited | Wholesale & retail | 2025 |
| Yorkshire 600 Ltd | Information & communication | 2021 |
| Yorkshire Home Heating Limited | Construction | 2015 |
| Zest Care Homes Limited | Health & social care | 2007 |
| Zest Investment (Bohill) Limited | Health & social care | 2008 |
| Zest Investment (Bridgewater) Limited | Administrative & support | 2008 |
| Zest Investment (Newtownards) Limited | Health & social care | 2008 |
| Zest Investment (Omagh) Limited | Health & social care | 2008 |
| Zest Investment (Portadown) Limited | Health & social care | 2008 |
| Zest Investment (Watton) Limited | Health & social care | 2008 |
| Zest Investment Group Limited | Professional & scientific | 2008 |
| Zoetrope Holdings Limited | Administrative & support | 2021 |