The decision means the 3639 former Feltex shareholders seeking $185 million from former Feltex directors and IPO promoters will get another day in the High Court.
It leaves former directors Timothy Saunders, Samuel Magill, John Feeney, Craig Horrocks, Peter Hunter, Peter Thomas and Joan Withers to face the second tranche of the trial, along with sale promoter Credit Suisse Private Equity and vendor Credit Suisse First Boston Asian Merchant Partners.
IoD chief executive Kirsten Patterson said the institute could not comment specifically but cases such as this "are really difficult for everyone involved, shareholders and directors".
"The timeframe is concerning....the length of time this is taking is difficult and challenging for all those involved. The IoD will monitor what the courts decide and consider what learnings there are for governance best practice."
NZ Shareholders' Association chief executive Michael Midgley said it was difficult to comment as the matter was before the court.
"It is good to hear from the Supreme Court, the highest court in the land, there is still a way forward - we will have to wait and see what it is."
Midgley said the foundations of the case were before his time in the job but he was aware shareholders were "seriously aggrieved".
Association chairman John Hawkins was not immediately available for comment.