Welcome to the Young Enterprise Big Market 2023
| School | Town | Colour Zone | Stall No(s). |
| Antrim Grammar School | Antrim | Pink | 10 |
| Antrim Grammar School | Antrim | Pink | 11 |
| Antrim Grammar School | Antrim | Green | 4 |
| Aquinas Grammar School | Belfast | Pink | 12 |
| Ballycastle High School | Ballycastle | Pink | 3 |
| Ballymena Academy | Ballymena | Yellow | 8 |
| Ballymena Academy | Ballymena | Yellow | 9 |
| Banbridge Academy | Banbridge | Purple | 2 |
| Bangor Academy & Sixth Form College | Bangor | Yellow | 3 |
| Beechlawn School | Hillsborough | Blue | 5 |
| Beechlawn School | Hillsborough | Blue | 4 |
| Belfast High School | Newtownabbey | Orange | 10 |
| Cambridge House Grammar School | Ballymena | Red | 1 |
| Cambridge House Grammar School | Ballymena | White | 5 |
| Cambridge House Grammar School | Ballymena | Red | 2 |
| Cambridge House Grammar School | Ballymena | White | 2 |
| Cambridge House Grammar School | Ballymena | White | 3 |
| Cambridge House Grammar School | Ballymena | Red | 4 |
| Cambridge House Grammar School | Ballymena | White | 3 |
| Cambridge House Grammar School | Ballymena | White | 4 |
| Cambridge House Grammar School | Ballymena | White | 11 |
| Cambridge House Grammar School | Ballymena | Yellow | 1 |
| Cambridge House Grammar School | Ballymena | Yellow | 2 |
| Cambridge House Grammar School | Ballymena | Pink | 1 |
| Cambridge House Grammar School | Ballymena | Pink | 2 |
| Cambridge House Grammar School | Ballymena | Red | 5 |
| Cambridge House Grammar School | Ballymena | White | 5 |
| Carrickfergus Grammar School | Carrickfergus | Pink | 6 |
| Ceara School | Lurgan | Blue | 8 |
| Connect-ed | Ballymena | White | 1 |
| Cookstown High School | Cookstown | Orange | 12 |
| Cullybackey College | Cullybackey | Orange | 3 |
| Donard School | Banbridge | Blue | 11 |
| Donard School | Banbridge | Blue | 10 |
| Dunclug College | Ballymena | Pink | 4 |
| Friends’ School | Lisburn | Green | 10 |
| Friends’ School | Lisburn | Yellow | 11 |
| Glenlola Collegiate School | Bangor | Green | 1 |
| Hazelwood Integrated College | Belfast | Pink | 9 |
| Knockavoe School | Strabane | Blue | 3 |
| Lagan College | Belfast | Orange | 11 |
| Larne High School | Larne | Pink | 7 |
| Limavady Grammar School | Derry/ Londonderry | Orange | 4 |
| Limavady Grammar School | Derry/ Londonderry | Orange | 5 |
| Lisnagarvey High School | Lisburn | Purple | 4 |
| Lisnagarvey High School | Lisburn | Orange | 1 |
| Lisnagarvey High School | Lisburn | Purple | 3 |
| Lisnagarvey High School | Lisburn | Green | 9 |
| Longstone School | Dundonald | Red | 14 |
| Nendrum College | Comber | Red | 11 |
| Newry High School | Newry | Green | 12 |
| Newry High School | Newry | Red | 12 |
| Newtownhamilton High School | Newtownhamilton | White | 8 |
| Newtownhamilton High School | Newtownhamilton | White | 9 |
| Newtownhamilton High School | Newtownhamilton | Red | 8 |
| Newtownhamilton High School | Newtownhamilton | Red | 9 |
| Newtownhamilton High School | Newtownhamilton | White | 6 |
| Newtownhamilton High School | Newtownhamilton | White | 7 |
| Newtownhamilton High School | Newtownhamilton | Red | 6 |
| Newtownhamilton High School | Newtownhamilton | Red | 7 |
| Northern Regional College | Ballymena | Purple | 11 |
| Northern Regional College | Ballymena | Orange | 2 |
| Northern Regional College | Ballymena | Purple | 7 |
| Omagh Academy | Omagh | Orange | 9 |
| Our Lady & St Patricks College | Belfast | Yellow | 5 |
| Our Lady & St Patricks College | Belfast | Yellow | 6 |
| Our Lady & St Patricks College | Belfast | Orange | 6 |
| Park School and Outreach Service | Belfast | Blue | 1 |
| Park School and Outreach Service | Belfast | Blue | 2 |
| Parkhall Integrated College | Antrim | Yellow | 4 |
| Parkhall Integrated College | Antrim | Yellow | 12 |
| Parkhall Integrated College | Antrim | Red | 10 |
| Parkview Special School | Lisburn | Blue | 12 |
| Priory Integrated College | Hollywood | Green | 11 |
| RBAI | Belfast | Orange | 8 |
| Riverside School | Antrim | Blue | 9 |
| Rockport School | Holywood | Orange | 7 |
| Royal School Dungannon | Dungannon | Pink | 8 |
| St Colmans High and Sixth Form College | Ballynahinch | Pink | 5 |
| St Malachy’s College | Belfast | Green | 6 |
| St Malachy’s College | Belfast | Green | 7 |
| St Malachy’s Primary School | Bangor | Red | 3 |
| St Patrick’s College | Dungannon | Purple | 6 |
| St Patrick’s College | Dungannon | Purple | 9 |
| St Patrick’s College | Dungannon | Purple | 10 |
| St Patrick’s College | Banbridge | White | 12 |
| St Patrick’s College | Dungannon | Purple | 5 |
| St Patrick’s College | Dungannon | Purple | 8 |
| St Ciaran’s College | Ballygawley | Green | 2 |
| St Ciaran’s College | Ballygawley | Green | 3 |
| St Ciaran’s College | Ballygawley | Green | 8 |
| St Malachy’s Primary | Bangor | Red | 13 |
| St Patrick’s College | Banbridge | Blue | 6 |
| Strangford Integrated College | Newtownards | Yellow | 7 |
| Strathearn School | Belfast | Yellow | 10 |
| Wallace High School | Lisburn | Purple | 1 |
| Thornfield House School | Jordanstown | Blue | 7 |
