Markwayne Mullin

Markwayne Mullin is an American politician and businessman who has served as the ninth United States Secretary of Homeland Security since 2026. A member of the Republican Party, he previously held the position of junior United States senator from Oklahoma from 2023 to 2026 and was a U.S. representative for Oklahoma's second congressional district from 2013 to 2023. His career is marked by a focus on business and public service, reflecting his commitment to combining entrepreneurial spirit with governmental responsibilities. In his role as a senator, Mullin has engaged in various investment activities, as evidenced by his trading disclosures. His firm and investment strategy appear to align with sectors such as healthcare, technology, and industrial services, given his notable transactions involving companies like UnitedHealth Group and Goldman Sachs. Between December 17, 2025, and February 25, 2026, Mullin reported 80 disclosures, comprising 51 purchases and 18 sales. His trading activity has primarily focused on stocks such as Iron Mountain Incorporated and MasTec, Inc., with reported amounts ranging from $50,001 to $100,000 for larger transactions and $1,001 to $15,000 for smaller ones.