Top Lobbying Clients
Every organization that pays lobbyists to influence Congress, ranked by total spending. Data from Senate LDA filings, 2018–2025.
AI Overview
These are the organizations spending the most to influence Congress. The top clients aren't just big corporations — they include trade associations like PhRMA and the Chamber of Commerce that pool industry money for maximum impact. When a single client spends millions on lobbying, they're buying access and influence that ordinary citizens can't match. Watch for: companies that suddenly increase spending (something big is at stake) and clients lobbying on issues that directly affect their bottom line.
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Understanding Lobbying Clients
OpenLobby tracks 37,994 organizations that have filed lobbying disclosures with the U.S. Senate since 2018. These clients collectively spent $37.7 billion on federal lobbying across 726,000+ quarterly filings.
The top spender, the U.S. Chamber of Commerce, has invested over $607 million in lobbying — more than three times the next largest client. Trade associations like the Chamber pool money from thousands of member companies, amplifying their collective influence far beyond what any single company could achieve.
Click any client to see their full lobbying profile: spending trends, lobbying firms hired, individual lobbyists deployed, issue areas targeted, government agencies contacted, and actual descriptions from their quarterly filings.