| Wwtl Investments Limited | Real estate | 2024 |
| Wycombe Abbey Developments Ltd | Construction | 2015 |
| Wycombe Abbey International Limited | Education | 2015 |
| Wycombe Accountancy Limited | Professional & scientific | 2009 |
| Wycombe Apartments Ltd | Real estate | 2021 |
| Wycombe Appliances Ltd | Other services | 2020 |
| Wycombe Care Ltd | Health & social care | 2020 |
| Wycombe Community Arts Centre | Arts & recreation | 2000 |
| Wycombe Community Radio CIC | Information & communication | 2013 |
| Wycombe District Swimming Club | Arts & recreation | 2016 |
| Wycombe Eagles Volleyball Ltd | Arts & recreation | 2022 |
| Wycombe Electrical Ltd | Construction | 2016 |
| Wycombe Engineering Solutions Ltd | Manufacturing | 2013 |
| Wycombe Estate Agents Limited | Real estate | 2023 |
| Wycombe Executive Travel Ltd | Transport & logistics | 2022 |
| Wycombe Express Ltd | Other services | 2022 |
| Wycombe Fast Food Limited | Hospitality | 2020 |
| Wycombe Food Hub CIC | Wholesale & retail | 2020 |
| Wycombe Fresh Fish Ltd | Wholesale & retail | 2025 |
| Wycombe Garage Ltd | Wholesale & retail | 2025 |
| Wycombe Heating Services Limited | Construction | 2023 |
| Wycombe Heritage and Arts Trust | Arts & recreation | 2013 |
| Wycombe High School Academies Trust | Education | 2011 |
| Wycombe Home Improvements Limited | Extraterritorial | 2019 |
| Wycombe Homes Limited | Construction | 2019 |
| Wycombe Kebab and Piri Piri Ltd | Hospitality | 2025 |
| Wycombe Lions Ltd | Arts & recreation | 2026 |
| Wycombe Mechanics Ltd | Wholesale & retail | 2019 |
| Wycombe Medserve Ltd | Health & social care | 2026 |
| Wycombe Mind Limited | Health & social care | 2018 |
| Wycombe Mobile Tyres Ltd | Wholesale & retail | 2020 |
| Wycombe MOT Auto Centre Limited | Wholesale & retail | 2022 |
| Wycombe Motors Ltd | Wholesale & retail | 2021 |
| Wycombe Preparatory School Limited | Education | 2022 |
| Wycombe Properties Limited | Real estate | 2010 |
| Wycombe Recycling Limited | Water & waste | 2007 |
| Wycombe Services Ltd | Wholesale & retail | 2020 |
| Wycombe Slice Ltd | Hospitality | 2025 |
| Wycombe Spice Ltd | Hospitality | 2016 |
| Wycombe Super Store Ltd | Wholesale & retail | 2022 |
| Wycombe Tamil Sangam Ltd | Other services | 2024 |
| Wycombe Tandoori Ltd | Hospitality | 2017 |
| Wycombe Taste Ltd | Hospitality | 2026 |
| Wycombe Trade Cars Ltd | Wholesale & retail | 2024 |
| Wycombe Traders Limited | Wholesale & retail | 2016 |
| Wycombe Transport Ltd | Transport & logistics | 2026 |
| Wycombe UK Motors Ltd | Wholesale & retail | 2025 |
| Wycombe Wanderers Football Club Limited | Arts & recreation | 2004 |
| Wycombe Wanderers Foundation | Arts & recreation | 2006 |
| Wycombe Waste Clearance Ltd | Water & waste | 2024 |
| Wycombebarbers Ltd | Other services | 2023 |
| WYE Dene Properties Limited | Real estate | 2017 |
| WYE Mews Wooburn Management Company Limited | Households | 2021 |
| Wyle Designs Ltd | Other services | 2022 |
| WYN Property Sales Limited | Real estate | 2025 |
| Wyndale Estates Ltd | Real estate | 2021 |
| Wyndale Group LLP | | 2021 |
| X Marks the Spot Limited | Professional & scientific | 1998 |
| X-Burger High Wycombe Ltd | Hospitality | 2025 |
| X-Cell Power Limited | Manufacturing | 2022 |
| X8 BMT Legal Ltd | Professional & scientific | 2024 |
| Xagi Ltd | Wholesale & retail | 2021 |
| XB Diag Consulting Ltd | Information & communication | 2019 |
| XC Companies Group Ltd | Professional & scientific | 2023 |
| Xclusive (UK) Ltd | Wholesale & retail | 2012 |
| Xcmg UK Sales and Services Limited | Wholesale & retail | 2022 |
| Xfence Ltd | Administrative & support | 2026 |
| Xgarden Ltd | Construction | 2025 |
| Xgrass Ltd | Administrative & support | 2026 |
| XHJ Holdings Ltd | Professional & scientific | 2025 |
| XHJ Property Investments Ltd | Real estate | 2025 |
| XI Property Management Ltd | Households | 2024 |
| Xing Yuan Limited | Hospitality | 2015 |
| XLP1 Limited | Professional & scientific | 2018 |
| Xpandyourspace Limited | Construction | 2017 |
| Xpotential Global Limited | Professional & scientific | 2005 |
| Xpotential Limited | Professional & scientific | 2012 |
| XSA Ltd | Information & communication | 2026 |
| Xstatim Medical Limited | Professional & scientific | 2019 |
| XSX Home Improvement Ltd | Construction | 2025 |
| Xtreme Barberz Limited | Other services | 2013 |
| Xudu Data Limited | Professional & scientific | 2017 |
| Y&S Services Limited | Wholesale & retail | 2025 |
| Y.M.T. Distribution Limited | Wholesale & retail | 2025 |
| Y2OD Ltd | Construction | 2020 |
| YA XIN Trading Ltd | Other services | 2021 |
| Yadzi Solutions Limited | Wholesale & retail | 2025 |
| Yakhni Bone Broth Ltd | Manufacturing | 2025 |
| YAQ Eco Energy Limited | Construction | 2025 |
| Yaqub Real Estate Ltd | Real estate | 2026 |
| Yari Ltd | Construction | 2016 |
| Yariserv Limited | Information & communication | 2005 |
| Yasinea Ltd | Administrative & support | 2020 |
| Yastek Consulting Limited | Professional & scientific | 1997 |
| Yastek Ltd | Other services | 2020 |
| Yaver Bashir Limited | Health & social care | 2010 |
| Yazi Recruitment Services Ltd | Administrative & support | 2025 |
| YDG Sales Limited | Wholesale & retail | 2022 |
| Yehuda Shapiro Limited | Professional & scientific | 2011 |
| Yellow Cars (HW) Limited | Transport & logistics | 2012 |