The largest and most interconnected structures are historically 5 organizations,specifically the Aspen Institute Italia (president Giulio Tremonti), Astrid (president Franco Bassanini), Italy-USA Foundation (president Mauro della Porta Raffo), Italia Decide (president Luciano Violante) and Italianieuropei (president Massimo D’Alema), according to the the research from Openopolis, that examined 153 think tanks in Italy.
The 'non-partisan' (i.e. agreeing on subjects that are beyond debate, like NATO, US bases and an economy open for U.S. corporations) Italy-USA Foundation, is also the structure with the highest number of parliamentarians: “the Italy-USA Foundation can count ties with 29 parliamentarians, the highest figure among the organizations surveyed. In particular, 18 deputies and 11 senators are part of the foundation. It should be noted above all that the Italy-USA Foundation has representatives in all the main political parties, from the Democratic Party to the League, passing through the 5 Stars Movement and Forza Italia.
The Italy-USA Foundation also is the organization, beyond the parliamentarians, with the largest number of journalists, ambassadors, exponents of culture, fashion, science, entertainment, and Nobel laureates, over 120 important personalities, "united by the friendship between Italy and the United States of America".
The Italy-USA Foundation does not receive donations from public or private companies, or by any public or governmental or local institution or body, nor sponsorships or advertisements by companies. The Italy-USA Foundation is the in Italy to be supported only and exclusively by the individual membership fees of its members.