A third shareholder class action targeting collapsed sandalwood grower Quintis has also ensnared its auditor, Ernst & Young, which is accused of negligent conduct in signing off on the company's accounts for 2015 and 2016.

An action brought by Piper Alderman, and funded by Litigation Capital Management, bases its claim on the accounting treatment used in the two financial reports preceding the Perth-based group's spiral into voluntary administration this year. Piper Alderman is bringing the action against Quintis, founder and former boss Frank Wilson, and EY. Separate actions brought by Bannister Law and Gadens focusing on alleged lapses of disclosure are also before the Federal Court.