Octagon is the sports and entertainment content marketing arm of the Interpublic Group of Companies.

[1] Octagon was founded as Advantage International by former executives of the tennis marketing agency ProServ on April 1, 1983.

[3] In 1997, Interpublic Group completed the merger of Advantage and other agencies to form Octagon, overseeing athletes from Steffi Graf of WTA to Moses Malone of the NBA.

[5][6] On April 5, 2021, John Shea was named CEO of Octagon Sports & Entertainment Network (OSEN).

Phil de Picciotto serves as President of Octagon, overseeing its Talent + Properties business.