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SEC insider activity covers quarterly filings through June 30, 2026. Later filings are not included. Reported roles do not establish current employment or current holdings. SEC filing documents, sections and filing-text search cover filings dated January 1, 2000 onward. Earlier filings are deferred until after launch.
Summary
MARKWEST ENERGY is an organization, based in CO. Lobbying activity focuses on Fuel/Gas/Oil, Energy/Nuclear, Taxation/Internal Revenue Code. Political activity spans from 2011 to 2018.