It has acquired just over 1m shares in the shuttle tanker focused master limited partnership (MLP), or nearly 8% of the company.

Details of the acquisition emerged from a regulatory filing to the US Securities and Exchange Commission (SEC).

This is OppenheimerFunds’ second investment in the maritime MLP space in as many days following its move into GasLog Partners.

TradeWinds reported Tuesday that it had disclosed a holding of 1.37m