[3] In December 2020, Mullen purchased the Bitterroot Star from Michael and Victoria Howell, who founded the newspaper in 1985.

[4] In May 2021, Mullen purchased Idaho based newspaper St. Maries Gazette Record, founded in 1902 and operated by the Hammes family since 1958.

[5] In December 2021, Mullen purchased the Johnson Newspaper Group in Nebraska and Colorado The sale included the Grant Tribune-Sentinel, Imperial Republican and Holyoke Enterprise.

[6][7] In March 2022, Mullen acquired four Montana newspapers that Kavanagh family, including Cut Bank Pioneer Press, Shelby Promoter, Browning Glacier Reporter and The Valierian.

The sale included Colby Free Press, Goodland Star-News, Oberlin Herald, Norton Telegram, St. Francis Herald/Bird City Times and the Rawlins County Square Deal.