These are some of the most lucrative relationships on K Street. Below are firms that have inked million-dollar deals with a single client to push their agenda in the halls of Congress and executive branch agencies.

NOTE: Figures on this page are calculations by the Center for Responsive Politics based on data from the Senate Office of Public Records. Data for the most recent year was downloaded on July 23, 2020 and includes spending from January 1 - June 30. Prior years include spending from January through December.

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