Nicholls and Douglas was sentenced to eight years, six months and eight years, two months in jail respectively for the offending in both cases.
Tallentire got six years in jail while Sutherland and Ryan were sentenced to home detention, community work and ordered to pay reparations.
The FMA, the Securities Commission's successor, announced today that it was discontinuing the civil action.
This followed C+M's liquidator settling civil action against the company's auditors last year for $18.5 million.
It was also in light of the company's receivers issuing action against its former trustee.
"The FMA has determined that in light of the outcome of the criminal proceedings, the actions taken by the receivers and liquidators, and the limited personal assets of the directors, there would be little prospect of any recovery for investors if it were to pursue its civil claim," the regulator said today.
"The FMA considers that the misconduct that was the subject of the civil proceedings has been adequately addressed through the criminal process and the further time and cost of pursing the civil proceeding would not be justified or in the public interest."