The track record of the hedge and vulture funds that have arrived to Puerto Rico is, in a way, a preview of what the island can expect during and after the contentious negotiation process of its debt. Until now, only a few of the names of the hedge and vulture fund companies referred to as the Ad Hoc Group of Puerto Rico are known, because the group, as well as La Fortaleza and the Government Development Bank (GDB), have refused to reveal the details of its members. The leading firms are Fir Tree Partners, Monarch, Perry Capital, Brigade, Centerbridge, Davidson Kempner, and Stone Lion. That we know. The Center for Investigative Journalism managed to make a compendium of their profiles and gathered some data on its top executives collected from official documents of the Securities and Exchange Commission (SEC) or from reports mainly published by foreign media.