Markwayne Mullin Homeland Security Secretary Nomination Hearing

Senator Markwayne Mullin's stock trading activities came under increased scrutiny following disclosures of numerous transactions made over several years. Reports highlighted significant activity in his portfolio, including purchases in companies like Carpenter Technology and Chevron. The timing of some trades, particularly those made before significant geopolitical events or policy shifts, raised questions about potential insider knowledge or conflicts of interest. His personal wealth has reportedly seen substantial growth during his tenure in Congress.

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Senator Markwayne Mullin purchased stock valued between $1,001 and $15,000 in Stride, Inc., a company providing online private schools. This trade, made on July 30, 2024, was disclosed in a periodic transaction report on November 8, 2024. The late disclosure raised concerns about potential violations of federal law. Stride, Inc. had received $405,000 in federal contracts since 2020. Ethics experts noted the purchase offered the appearance of a conflict of interest, especially given Mullin's role on the Senate Health, Education, Labor, and Pensions Committee.

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Senator Markwayne Mullin made multiple stock purchases, which were later disclosed in July 2025, approximately two and a half years after the transactions. These purchases, each valued between $1,000 and $15,000, included stocks such as Insulet Corporation, Hubbell Inc., Fabrinet, EXLService Holdings, Corteva, and Celsius Holdings. The delay in disclosure violated the STOCK Act, which requires reporting within 45 days, potentially subjecting Mullin to fines. Fabrinet saw a significant gain of 134.5% since the time of Mullin's purchase.

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Markwayne Mullin was sworn in as a U.S. Senator for Oklahoma, filling the seat vacated by Jim Inhofe. He brought a diverse background to the Senate, including experience as a plumbing company owner, rancher, former mixed martial arts fighter, and as an enrolled citizen of the Cherokee Nation. His office noted he was the first tribal citizen to serve in the Senate in nearly two decades and the second Cherokee Nation citizen ever elected to the chamber.

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Markwayne Mullin won a special election for the U.S. Senate seat in Oklahoma, succeeding Jim Inhofe who had announced his resignation. Mullin had declared his candidacy for the Senate in February 2022. He secured the Republican nomination in a runoff election on August 23, 2022, and subsequently won the general election against Democrat Kendra Horn. This victory marked his transition from the House of Representatives to the Senate.

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The House Ethics Committee concluded a nearly five-year investigation into Representative Markwayne Mullin's business dealings. While the committee decided not to impose financial sanctions, Mullin was ordered to return $40,000 he had received from a family company. The investigation stemmed from allegations that he broke House rules by appearing in commercials for his family plumbing business and receiving improper payments as a president and director of family companies. Mullin had given conflicting accounts of his role in the companies.

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U.S. Representative Markwayne Mullin purchased over $100,000 worth of stock in Innate Immunotherapeutics, an Australian pharmaceutical company. This purchase occurred in January 2017, and Mullin was one of at least five members of Congress who invested in the company. The company was developing a drug for multiple sclerosis patients. Later, in August 2018, it was reported that Mullin still owned this stock and was not under investigation, even as a New York Congressman faced charges related to insider trading of the same stock.

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