Anselmo got the idea for PanAmSat from Norm Leventhal, a communications lawyer in Washington, D.C., to whom he had turned to for advice regarding difficulties he was encountering in getting reasonably priced satellite transmission for his Spanish International Network (SIN), the current-day Univision.

[2] Anselmo financed the entire project himself and Leventhal's law firm, hiring Martin Rothblatt for special satellite technical advice, filed for approval from the Federal Communications Commission (FCC) and lining up an initial satellite from RCA Astro-Electronics and a heavily discounted launch from Arianespace.

PanAmSat, led by Anselmo, successfully lobbied the United States Congress to permit it to operate globally, competing against Intelsat.

In 2003, News Corporation purchased Hughes Electronic's PanAmSat division and on 24 April 2004 sold PanAmSat to a consortium of private equity firms in a leveraged buyout including Kohlberg Kravis Roberts & Co. (KKR), Carlyle Group and Providence Equity Partners for US$4.3 billion.

In an ironic twist of fate, its private equity owners sold PanAmSat to its archrival Intelsat in August 2005 for a total of US$4.3 billion in a deal finally consummated in July 2006.