South Australian independent publication, InDaily, has announced the top 100 companies from this year's SA Business Index list.

The following Water Industry Alliance members have been recognised in the third annual version of the index, compiled by Adelaide financial services firm Taylor Collison.

89           WGA (Wallbridge Gilbert Aztec)

71           Guidera O’Connor Pty Ltd

54           SAGE Group Holdings Ltd (SAGE Automation)

48           Nova Aerospace Pty Ltd (Nova Systems)

SA Business Index is based on revenue and estimated market capitalisation. Companies are considered eligible for the list if they have a South Australian head office with an Adelaide share registry, or are SA operated, founded and majority-owned by South Australians. Qualifying companies can’t be government-run, agencies of government or a registered charity.

The full list will be announced at the South Australian Business Index luncheon on Thursday September 28 at Adelaide Oval.