To be eligible for inclusion in the list, compiled by Index partners Taylor Collison, companies must:

• Be a South Australian entity with an Adelaide ownership register, or be a South Australian operated entity;
• Be a company founded and majority (50.01 per cent plus) owned by South Australians.

Companies owned in part or whole by government, government agencies and organisations, and registered charities are not eligible.

While companies don’t have to nominate to be included in the list, which is based on market capitalisation, local businesses are encouraged to put their names forward.

The Index, to be announced at a business lunch on September 20, also includes individual awards for fast-rising companies and new entrants to the list.

Now in its fifth year, the Index has become a key source of data for those with a keen interest in the South Australian economy and business environment.

InDaily editor David Washington said this year’s Index would be a chance to look back on five years of data about the most significant companies in South Australia and gauge what this means for the future.

“The last five years have been a transformational period in the local economy, with plenty of challenges but also some bright spots,” he said. “Tracking the data will give us a good idea about which industry sectors are growing, those that are falling, and where South Australians will be working in the decades to come.

“And, of course, we’ll be revealing which companies have made the cut in 2018/19.”

The industry composition of last year’s South Australian Business Index.

To nominate your company, go here. Nominations close at the end of August.

The full Index will be announced at a luncheon at the Adelaide Convention Centre on September 20. To book your table, go here.