| JKH Holdings Limited | Financial services | 2017 |
| JKS Data Solutions Ltd | Information & communication | 2026 |
| Jlrs Rigging Services Ltd | Professional & scientific | 2025 |
| JMP Holdings (Scarborough) Ltd | Financial services | 2022 |
| JMP Investments Scarborough Ltd | Real estate | 2022 |
| JMS Drain Solutions Limited | Administrative & support | 2012 |
| JMS Motor Services Limited | Wholesale & retail | 2017 |
| Joanne LEE Aesthetics Ltd | Other services | 2013 |
| Joash Limited | Mining & quarrying | 2012 |
| JOE Tiffany Plastering Contractors Ltd | Construction | 2023 |
| Johal Investment Management Limited | Financial services | 2020 |
| John Mitchell (Office Equipment) Limited | Wholesale & retail | 1972 |
| John Wheatley GAS Plumbing and Heating Limited | Manufacturing | 2015 |
| John Wood Plumbing Heating & Renewables Limited | Construction | 2024 |
| Johnson Electrical Limited | Construction | 1999 |
| Johnson Property Reinstatement Ltd | Financial services | 2025 |
| Johnson's Upholstery & Furnishings Ltd | Wholesale & retail | 2007 |
| Jomarasy Car Wash Ltd | Administrative & support | 2026 |
| JON Carver GAS Services Limited | Construction | 2011 |
| JON Scott-Nelson Ltd | Wholesale & retail | 2023 |
| Jones Electrical Services Scarborough Limited | Construction | 2020 |
| Jordent Limited | Health & social care | 2012 |
| Jorvik Property Maintenance Solutions Ltd | Households | 2025 |
| JOS Safety Solutions and Plant Training Ltd | Construction | 2026 |
| Jowson Corporation Limited | Construction | 2007 |
| Jowson Group Ltd | Real estate | 2021 |
| JP Decorating Solutions Limited | Construction | 2020 |
| JP Homes North Ltd | Real estate | 2025 |
| JPH Venues Ltd | Hospitality | 2025 |
| JPL Cloughton Limited | Real estate | 2021 |
| JPL Homes Limited | Real estate | 2015 |
| JR Detox Health Group Limited | Health & social care | 2025 |
| JRB Sports Ltd | Education | 2023 |
| JS Financial Planning Ltd | Professional & scientific | 2015 |
| JSF Media Limited | Information & communication | 2019 |
| Jsinteriorsuk Ltd | Manufacturing | 2018 |
| JSR Electrical and Mechanical Services Limited | Construction | 1999 |
| JT & Sons Ltd | Wholesale & retail | 2025 |
| JT Care Limited | Health & social care | 2025 |
| JTB Offshore Ltd | Professional & scientific | 2018 |
| JTW Contracts Limited | Construction | 2017 |
| Juda Property Ltd | Construction | 2020 |
| Juicebitz Audio Visual Limited | Wholesale & retail | 2013 |
| Julie Heslington Limited | Education | 2017 |
| Justified & Ancient Antiques (Scarborough) Limited | Wholesale & retail | 2013 |
| JW Keystone Property Investments Ltd | Real estate | 2024 |
| JWE Brickwork Limited | Construction | 2025 |
| JWJ Marine Services Ltd | Professional & scientific | 2025 |
| Jwnk Ltd | Hospitality | 2025 |
| JWS Financial Management Ltd | Professional & scientific | 2013 |
| JWS Trustees & Nominees Ltd | Professional & scientific | 2011 |
| K & Co Scarborough Limited | Hospitality | 2024 |
| K & J Brickwork & Masonry Limited | Construction | 2025 |
| K & R Building Service's (Scarborough) Ltd | Construction | 2014 |
| K Holt and SON Limited | Construction | 2002 |
| K J Brown (Joinery & Building Contractors) Ltd | Construction | 2008 |
| K M Davis Properties Limited | Real estate | 2001 |
| K Olaf Ltd | Real estate | 2018 |
| K P Civil & Construction Services Ltd | Construction | 2020 |
| K P D Consumables Ltd | Wholesale & retail | 2004 |
| K R Wilson Auto Services Limited | Wholesale & retail | 2013 |
| K RAJ Verma Ltd | Health & social care | 2016 |
| K&A Trans Ltd | Transport & logistics | 2019 |
| K&N Caravans Ltd | Wholesale & retail | 2026 |
| K-Man Enterprises Ltd | Health & social care | 2019 |
| K8 Property Ltd | Real estate | 2020 |
| KAB1 Homes Limited | Real estate | 2026 |
| Kafle Import Export Limited | Wholesale & retail | 2025 |
| Kahuna Aesthetics Ltd | Other services | 2022 |
| Kairn Dykes Limited | Other services | 2013 |
| Kalirai Investment Management Ltd | Construction | 2022 |
| Kamermo Pharma Marketing Ltd | Professional & scientific | 2004 |
| Katharos Wellness Ltd | Health & social care | 2025 |
| Katona Enterprises Ltd | Real estate | 2019 |
| KAY & SHI Limited | Wholesale & retail | 2014 |
| KD Recruitment Limited | Administrative & support | 2017 |
| KD Subc Ltd | Administrative & support | 2021 |
| KDR Leisure Mobile Limited | Manufacturing | 2014 |
| KDT Graphics Limited | Administrative & support | 2006 |
| Keatley Racing Limited | Arts & recreation | 2022 |
| Keedrew Property Ltd | Real estate | 2024 |
| Keep Digital Ltd | Manufacturing | 2021 |
| Keepers Court 1 (Whitby) RTM Company Limited | Households | 2019 |
| Keepers Court 2 (Whitby) RTM Company Limited | Households | 2019 |
| Keerthiga Traders Ltd | Wholesale & retail | 2026 |
| KEH Project Services Ltd | Administrative & support | 2025 |
| Keith Hanson Joinery Limited | Construction | 2010 |
| Keith Harrison Builders Ltd | Construction | 2006 |
| Kelly Limited | Real estate | 1985 |
| Kelly Property Services Ltd | Administrative & support | 2025 |
| Kensington Court Management (Scarborough) Limited | Households | 2003 |
| Kenwood House RTM Company Limited | Households | 2014 |
| Keowns Limited | Hospitality | 2026 |
| Kepwick Stores Ltd | Wholesale & retail | 2025 |
| Keyf Ltd | Hospitality | 2026 |
| KFB (Scarborough) Limited | Construction | 2004 |
| KG Services (Yorkshire) Limited | Construction | 2011 |
| Kiddiwinks (Scarborough) Limited | Health & social care | 2003 |
| Kids & Co. (Scarborough) Limited | Education | 1999 |
| Kiemic Ltd | Administrative & support | 2009 |