| 2m Associates Ltd | Builders | BT41 3PY | 2003 |
| 3 Construction Ltd | Builders | BT41 3NR | 2024 |
| 360 Design & Fitout Ltd | Builders | BT45 8RL | 2015 |
| 4men'S Ltd | Hair & beauty | BT41 3BB | 2023 |
| 825 Contracts Ltd | Builders | BT45 7SS | 2026 |
| A & B Finlay Industrial Cleaning Ltd | Cleaners | BT45 6AG | 2026 |
| A & S Mechanical (N.I.) Ltd | Plumbing & heating | BT45 6LS | 2011 |
| A B Agri Services (Ni) Ltd | Builders | BT45 6HZ | 2012 |
| A D M Installation Ireland Ltd | Builders | BT41 3QB | 2024 |
| A Ok Installations Ltd | Builders | BT45 7LF | 2005 |
| Aa Specialist Joinery Ltd | Joiners & carpenters | BT41 3NB | 2008 |
| Aaron Lewis Engineering Services Ltd | Electricians | BT41 2FL | 2023 |
| Aesthetically Beautiful By Danielle Coey Ltd | Hair & beauty | BT45 5AS | 2024 |
| Aesthetically Beautiful Weight Management Clinic Ltd | Hair & beauty | BT45 5DA | 2025 |
| Agc Systems T/A Rainbow Restoration Ltd | Builders | BT45 7JX | 2016 |
| Agri Drone Systems Ltd | Builders | BT45 7JX | 2022 |
| Alexander Property Ltd | Builders | BT41 3HY | 2004 |
| Ali Rose Events Ltd | Gardeners & landscapers | BT41 3SG | 2022 |
| All Ab Ltd | Builders | BT41 4NZ | 2025 |
| All Clear Cleaning Service Ltd | Cleaners | BT41 2US | 2025 |
| Allstar Contracts Ltd | Painters & decorators | BT45 6JE | 2013 |
| Amb Electrics Ltd | Electricians | BT45 7EB | 2012 |
| Ambar Fire & Security Systems Ltd | Builders | BT41 3SF | 2025 |
| Ambar Systems Ltd | Builders | BT41 3SF | 2008 |
| Ams (Advanced Motor Solutions) Ltd | Garages & mechanics | BT45 7TR | 2025 |
| Anita'S Health & Beauty Clinic Ltd | Hair & beauty | BT41 4BA | 2023 |
| Antrim Car & Van Ltd | Garages & mechanics | BT41 4NT | 2026 |
| Antrim Carpentry and Design Ltd | Joiners & carpenters | BT41 4HH | 2025 |
| Antrim Nails & Spa Ltd | Hair & beauty | BT41 4AN | 2024 |
| Antrim Pest Control Ltd | Pest control | BT41 1JZ | 2024 |
| Antrim Tile & Bath Ltd | Flooring & tiling | BT41 4LD | 2014 |
| Ao Contracts Ltd | Builders | BT41 2FL | 2025 |
| Apex Building Hygiene Ltd | Cleaners | BT41 4DF | 2026 |
| Apex Roofing & Joinery Ltd | Joiners & carpenters | BT41 3TU | 2025 |
| Ardalvin Ltd | Plasterers | BT41 2AX | 2002 |
| Ardreagh Formwork (Ni) Ltd | Builders | BT45 6ED | 2018 |
| Asn Construction Ltd | Builders | BT41 3RW | 2017 |
| Attni Ltd | Builders | BT45 6LT | 2022 |
| Aura Sugaring Ltd | Hair & beauty | BT45 6AG | 2025 |
| Aw Builders Ltd | Builders | BT41 3DG | 2021 |
| Ballygood Developments Ltd | Builders | BT45 6ED | 2018 |
| Ballymena Pest Control Ltd | Pest control | BT41 1JZ | 2025 |
| Barnish Electrical Ltd | Electricians | BT41 4BE | 2018 |
| Barry Mccann Ltd | Plasterers | BT41 3LW | 2004 |
| Bateson Bros Ltd | Plumbing & heating | BT45 6EW | 2011 |
| Bc Plumbing & Heating Contracts Ltd | Plumbing & heating | BT45 8SB | 2020 |
| Beauty Secrets At Dunadry Ltd | Hair & beauty | BT41 2QZ | 2015 |
| Beechtree Garden Centre Ltd | Gardeners & landscapers | BT45 8NS | 2020 |
| Bell Commercials Ltd | Garages & mechanics | BT41 3QS | 2021 |
| Belone Technical Ltd | Builders | BT41 3RA | 2004 |
| Benchworx Bespoke Joinery Ltd | Joiners & carpenters | BT41 3RQ | 2023 |
| Bldr Ltd | Builders | BT41 4BE | 2015 |
| Blonds Salon Ltd | Hair & beauty | BT41 2NT | 2016 |
| Bmk Brickworks Ni Ltd | Builders | BT41 3NN | 2025 |
| Bmp Contracts Ltd | Plumbing & heating | BT45 7ED | 2013 |
| Bmr Contracts (Ni) Ltd | Builders | BT45 8PF | 2013 |
| Bnc Developments Ltd | Builders | BT41 2DZ | 2020 |
| Bravura Group Ltd | Roofers | BT41 2NF | 2024 |
| Brendan Campbell Construction Ltd | Builders | BT45 8LF | 2025 |
| Brendan Scullion Construction Ltd | Builders | BT45 8JN | 2014 |
| Bricktec Contracts Ltd | Builders | BT41 3AB | 2019 |
| Briermount Properties Ltd | Builders | BT41 3LA | 2018 |
| Bt45 - the Collective Ltd | Hair & beauty | BT45 6ED | 2019 |
| Buildrite Construction & Maintenance Ltd | Builders | BT41 2RR | 2019 |
| Buncrana Road (Derry) Holdings Ltd | Groundworks & demolition | BT45 8JH | 2020 |
| Busy Broom Commercial Cleaning Services Ltd | Cleaners | BT41 4DF | 2023 |
| C & D Electrical (N.I.) Ltd | Electricians | BT45 5EL | 2016 |
| C & S Home Services N.I. Ltd | Builders | BT45 7JN | 2011 |
| C Bradley Ltd | Builders | BT45 7FA | 2025 |
| C H E (Castledawson) Ltd | Electricians | BT45 8JX | 2023 |
| C Kelly Contracts Ltd | Builders | BT45 7JX | 2014 |
| C M C (Ni) Ltd | Builders | BT45 7DT | 2008 |
| C Wilson Electrics Ltd | Electricians | BT45 7TU | 2026 |
| C.S.Spray.Worx Ltd | Painters & decorators | BT41 1DE | 2026 |
| Cabinspace Ltd | Builders | BT45 8HG | 2017 |
| Cam Lifts Ltd | Builders | BT41 3TE | 2013 |
| Cam Plant & Machinery Ltd | Groundworks & demolition | BT45 8ER | 2005 |
| Campbell Electrical Ltd | Electricians | BT45 8LF | 2023 |
| Canavan Construction Ltd | Builders | BT45 6JA | 2004 |
| Caraman Ltd | Builders | BT45 6HZ | 2005 |
| Carcon Insulation Specialists Ltd | Builders | BT41 3PW | 2026 |
| Carn Industrial Services Ltd | Groundworks & demolition | BT45 8PD | 2025 |
| Carniny Developments Ltd | Builders | BT41 3LA | 2019 |
| Castle Homes (N.I.) Ltd | Joiners & carpenters | BT41 4NT | 1986 |
| Castle Homes Timber Frame Ltd | Builders | BT41 4NZ | 2023 |
| Cbs Construction Management Ltd | Builders | BT45 5NB | 2025 |
| Ceasefire Services Ltd | Builders | BT45 8EY | 2018 |
| Centum Engineering Services Ltd | Builders | BT41 3SG | 2015 |
| Century Data Ltd | Builders | BT45 5QF | 2025 |
| Ch-Cha Ltd | Garages & mechanics | BT45 8DG | 2026 |
| Charge To Go Ltd | Electricians | BT45 6LH | 2022 |
| Church Road Enterprises Ltd | Builders | BT41 3UF | 2017 |
| Cj Electrics Ltd | Electricians | BT45 5NN | 2025 |
| Cjd Electrical Compliance Trading Ltd | Electricians | BT45 8BX | 2025 |
| Cjf Construction Ltd | Builders | BT45 7RX | 2025 |
| Clarke Eco Wall Ltd | Flooring & tiling | BT45 8JR | 2014 |
| Cloane Construction Ltd | Builders | BT45 7LW | 1999 |
| Cloane Developments Ltd | Builders | BT45 7LW | 2014 |
| Close Contracts Ltd | Groundworks & demolition | BT45 6LQ | 2025 |
| Cm Plastering Contracts Ltd | Builders | BT41 2PF | 2016 |
| Cm Sons Home Improvements Ltd | Roofers | BT45 8BE | 2025 |
| Cmk Electrics Ltd | Electricians | BT45 7LY | 2017 |
| Cod Electrics Ltd | Electricians | BT41 3TN | 2023 |
| Colm Speirs Ltd | Builders | BT45 5EQ | 2006 |
| Combined Building Services UK & Ireland Ltd | Builders | BT45 5NB | 2021 |
| Combined Facilities Management Ltd | Builders | BT45 8BS | 1999 |
| Commercial Executive Cleaning Ltd | Cleaners | BT45 8AB | 2019 |
| Construction Testing Services Ltd | Builders | BT41 1AB | 2008 |
| Controls Automation Electrical Services Ltd | Electricians | BT41 3RL | 2015 |
| Convery Electrics Ltd | Electricians | BT45 7HE | 2020 |
| Conway Mechanical Services Ltd | Plumbing & heating | BT45 7QP | 2016 |
| Coogan Plastering Ltd | Plasterers | BT41 2PE | 2019 |
| Corromore Ltd | Builders | BT45 7JX | 2012 |
| Cpm (2022) Ltd | Builders | BT41 3NR | 2022 |
| Craigstown Roofing & Cladding Ltd | Roofers | BT41 3RP | 2002 |
| Cranfield Groundworks and Plant Hire Ltd | Builders | BT41 3ND | 2025 |
| Creeve Construction Ltd | Builders | BT41 3LP | 2005 |
| Crevenagh Properties Ltd | Builders | BT41 3UF | 2016 |
| Css Ireland Ltd | Builders | BT45 8QB | 2026 |
| Cuttin An'Trimmin Ltd | Gardeners & landscapers | BT41 1QA | 2026 |
| D & A Development Ltd | Builders | BT45 5EL | 1999 |
| D & B Contracts Ltd | Gardeners & landscapers | BT45 5QF | 2020 |
| D I Flooring Ltd | Flooring & tiling | BT45 8QB | 2012 |
| D Tourish Groundworks & Construction Ltd | Builders | BT45 8PN | 2025 |
| D Wilson Contracts Ltd | Builders | BT45 7SS | 2018 |
| D.L Access Ltd | Builders | BT41 1SE | 2019 |
| Daf Joinery Ltd | Builders | BT45 5JH | 2017 |
| Dal Access Ltd | Builders | BT45 5FR | 2021 |
| Damec Construction Ltd | Builders | BT45 6AR | 2018 |
| Darren Henderson Electrical Ltd | Electricians | BT45 5HY | 2019 |
| Db Building and Joinery Contracts Ltd | Joiners & carpenters | BT45 8LA | 2022 |
| Decorfinishni Ltd | Painters & decorators | BT45 7DH | 2026 |
| Deerpark Construction Ltd | Builders | BT45 8LB | 2022 |
| Derek Johnston Electrical Services Ltd | Electricians | BT41 4EY | 2009 |
| Derrygarve Window Systems Ltd | Glaziers | BT45 8EZ | 2016 |
| Derrynoid Construction Ltd | Builders | BT45 7LW | 2005 |
| Devlin Mechanical Ltd | Plumbing & heating | BT41 3NT | 2006 |
| Devlin Plastering Ltd | Plasterers | BT41 2NG | 2024 |
| Digital Construction Live Ltd | Builders | BT45 6BT | 2022 |
| District Pest Control Ltd | Pest control | BT45 5AJ | 2016 |
| Dlane Construction (N.I.) Ltd | Builders | BT45 7XD | 2011 |
| Dmac Truck & Trailer Repair Ltd | Garages & mechanics | BT45 6EW | 2021 |
| Dmcc Groundworks Ltd | Groundworks & demolition | BT45 8JR | 2017 |
| Dmr Mechanical Ltd | Plumbing & heating | BT45 8HB | 2018 |
| Dms Decorators (Antrim) Ltd | Painters & decorators | BT41 4PG | 2018 |
| Doherty Roofing Company Ltd | Roofers | BT45 8LB | 2015 |
| Door Access Solutions Ltd | Electricians | BT41 1BQ | 2022 |
| Doorfix Ring-Gard Ltd | Builders | BT41 2SJ | 2010 |
| Dor Construction & Plant Ltd | Builders | BT45 8JQ | 2017 |
| Dp Donnelly Ltd | Electricians | BT45 6FP | 2023 |