Walt Disney Co. has laid off Marvel Entertainment Chairman Isaac “Ike” Perlmutter as part of a cost-cutting campaign, a source confirmed Wednesday.

Perlmutter, 80, had supported activist shareholder Nelson Peltz’s unsuccessful bid this year to obtain a seat on Disney’s corporate board.

The executive was informed by phone Wednesday that Marvel Entertainment, a small division within the company responsible for comic book publishing and some consumer products, would be merged into larger Disney business units, according to a second source with knowledge of the matter.

Perlmutter could not be immediately reached for comment.

Dan Buckley, president of Marvel Entertainment, will remain and report to Marvel Studios President Kevin Feige, the second source said.

Disney began to eliminate 7,000 jobs Monday, in an effort to save $5.5 billion in costs and make its streaming business profitable.

Perlmutter, who outmaneuvered billionaire Carl Icahn for control of the comic book publisher in the late 1990s, sold Marvel to Disney for $4 billion in 2009.

Disney CEO Bob Iger later restructured Marvel in 2015, placing Marvel Studios under Walt Disney Studios. Perlmutter retained the title of chairman of Marvel Entertainment, a unit responsible for publishing, games, digital media and some consumer products.

Perlmutter, who friends say was upset with Disney’s financial performance under its former chief executive, Bob Chapek, took the unusual step of contacting Disney board members and executives multiple times last year to advocate for Peltz to join the board, according to regulatory filings.

Peltz and Perlmutter are friends who travel in the same social circles in Palm Beach, Fla.

Disney insiders had expressed incredulity at Perlmutter’s work on behalf of an activist shareholder.

The New York Times first reported Perlmutter’s ouster.