Impiombato v BHP Billiton Ltd (No 2)

In the case of Impiombato v BHP Billiton Ltd (No 2), the Federal Court was tasked with deciding the issue of a permanent stay of proceedings in three overlapping securities class actions against BHP Billiton Ltd. The respondents in the proceedings were Impiombato, Klemweb and LACERA, all of whom were seeking to represent groups of shareholders in separate class actions against the same respondent, BHP Billiton Ltd. The Court was required to determine whether one or more of the proceedings should be permanently stayed, given that they were substantially the same in terms of claims and causes of action. The Court considered the principles applicable to determining whether proceedings should be stayed, including the need to avoid duplication of effort, the potential for unfairness to the respondent, and the importance of ensuring that the proceedings are managed efficiently and effectively.

The Court ultimately decided that the proceeding brought by Klemweb should be permanently stayed, while the proceeding brought by LACERA should be temporarily stayed until 1 September 2019. The Court found that the proceeding brought by Impiombato should continue, but that the Court would retain jurisdiction to revisit the issue of staying the proceeding if necessary. The Court noted that the proceeding brought by Klemweb had been initiated after the proceeding brought by Impiombato, and that the claims in the two proceedings were substantially the same. The Court also found that the proceeding brought by LACERA was substantially the same as the proceeding brought by Impiombato, but that there was a possibility that the proceeding brought by LACERA contained additional claims that were not covered by the proceeding brought by Impiombato. The Court therefore decided to stay the proceeding brought by LACERA temporarily, to allow the applicant in the proceeding brought by Impiombato to investigate and consider any potential claims based on the additional period.

The Court's decision provides guidance to practitioners on the principles to be applied when determining whether to stay multiple proceedings in similar cases. The Court emphasised the importance of avoiding duplication of effort and ensuring that the proceedings are managed efficiently and effectively. The Court also noted the potential for unfairness to the respondent if multiple proceedings are allowed to continue, particularly where the claims and causes of action are substantially the same. The decision highlights the need for careful consideration of the issues in each case, and the importance of ensuring that the proceedings are managed in a way that is fair to all parties.