In 2017 PCA registered 41 news cases (out of 160 in overall). The administered cases included 7 interstate arbitrations, 97 investor-State arbitrations (the summaries can be found in the report), and 55 cases arising under contracts involving a State or other public entity or public interest.

The PCA Secretary-General received 15 requests to act as the appointing authority and 32 to designate an appointing authority.