In this Monday, April 25, 2016, file photo, Chicago Tribune and other newspapers are displayed at Chicago’s O’Hare International Airport. Hedge fund Alden, Tribune’s largest shareholder, has offered to buy the rest of the newspaper publisher, Thursday, Dec. 31, 2020, at a price that values it at $520.6 million. (AP Photo/Kiichiro Sato, File)

Hedge fund Alden, Tribune’s largest shareholder, has offered to buy the rest of the newspaper publisher at a price that values it at $520.6 million.

Alden sent a letter to Tribune on Dec. 14, according to a regulatory filing posted Thursday, offering $14.25 per for the stock of Tribune it doesn’t already own. Alden owns 31.6% of Tribune shares. The said it had not received “any feedback” to its letter, which it described as a “preliminary inquiry.”

Tribune did not immediately respond to a request for comment Thursday.

Alden bought its stake in Tribune