List of South Island companies
This is a list of major South Island, New Zealand based companies. To qualify a company must 1) have its registered office in the South Island; 2) a majority of its shareholders it must be listed on the NZX, NZAX or the Deloitte South Island Index and have an annual revenue of greater than NZ$100 million.
| Company | Sector | NZX |
| Alliance Group | Agriculture | - |
| Allied Press Limited | Publishing | - |
| Apple Fields Limited | Property Development | |
| Arthur Barnett | Retail | - |
| Aurora Energy | Electricity distribution | - |
| BLIS Technologies | Biotechnology | |
| Blue Sky Meats | Agriculture | - |
| Botry-Zen | Biotechnology | |
| Britten Motorcycle Company | Manufacturing | - |
| Canterbury Building Society | Financial Services | |
| Canterbury Television | Media | - |
| Cavotec MSL | Other | |
| Christchurch Casino | Hospitality | - |
| Citibus Limited | Transport | - |
| Connexionz | Technology | |
| Ebos Group | Technology | |
| Emersons | Food and beverage | - |
| Eurekster | Video game industry | - |
| Fergburger | Food and beverage | - |
| Foodstuffs South Island Limited | Retail | - |
| Fulton Hogan | Construction | - |
| Glenorchy Air | Transport | - |
| Griffin's Foods | Food and beverage | - |
| H & J Smith | Retail | - |
| Kathmandu | Retail | |
| Leopard Coachlines | Transport | - |
| Longacre Press | Publishing | - |
| Lyttelton Port Company | Port | |
| Macpac Outdoors | Manufacturing | - |
| McCashins Brewery | Food and beverage | - |
| Monteith's | Food and beverage | - |
| Mount Cook Group | Tourism and Transport | - |
| NZ Farming Systems Uruguay | Agriculture | |
| NZSKI | Tourism | - |
| New Zealand Wool Services International | Primary | |
| Nelson Building Society | Banking | - |
| New Zealand Midland Railway Company | Transport | - |
| New Zealand Natural | Hospitality | - |
| NZ Windfarms | Development | |
| Orion New Zealand Limited | Electricity distribution | - |
| Pacific Edge Limited | Biotechnology | |
| Particle Systems | Manufacturing | - |
| Passenger Transport | Transport | - |
| PGG Wrightson | Agriculture | |
| Plus SMS | Technology | |
| Postie Plus Group | Retail | |
| Property Finance Group | Financial Services | |
| Pyne Gould Corporation | Financial Services | |
| Radio Otago | Media | - |
| Red Bus Ltd | Transport | - |
| Ritchies Coachlines | Transport | - |
| Ryman Healthcare | Medicine | |
| Salehoo | Technology | - |
| SBS Bank | Banking | - |
| Scott Technology | Technology | |
| Silver Fern Farms | Agriculture | |
| SLI Systems | Technology | - |
| Smiths City Group | Retail | |
| South Canterbury Finance | Financial services | - |
| South Port New Zealand | Port | |
| Straylight Studios | Video game industry | - |
| The National Property Trust | Development | |
| The New Zealand Wine Company | Primary | |
| Two Paddocks | Hospitality | - |
| Union Shipping Group | Transport | - |
| Widespread Energy | Energy | |
| Widespread Portfolios | Mining | |
| Westland Milk Products | Manufacturing | - |
| Wests | Manufacturing | - |
| Windflow Technology | Technology | |
| Whitcombe and Tombs | Retail | - |
| Whitestone cheese | Food and beverage | - |
| Wigram Brewing company | Food and beverage | - |
| Wynn Williams & Co | Law | - |