Individual registered lobbyists ranked by client reach, with their firm, issue breadth and disclosure volume across Congress.
Ranked by client count. Figures cover the full 2025 disclosure year, from Lobbying Disclosure Act filings, captured .
The 50 lobbyists below are ranked by the number of clients named alongside them on 2025 registrations, from 322 at the top of the table to 63 at number 50. They work at 16 firms between them.
Every figure above comes from lobbying disclosures filed with the Clerk of the House and the Secretary of the Senate under the Lobbying Disclosure Act. Legis1 parses each filing — registrant, client, named lobbyists, issue codes and reported amount — and aggregates them into the table.
Totals here can differ from other published tallies of the same year. Filings are amended after the fact, publishers differ on how they consolidate subsidiaries and affiliated entities, and an organization that both retains outside firms and reports its own in-house spend can be counted more than one way. Where our number differs from another source, both are usually reading the same filings under different rules.
An LDA registration names every lobbyist expected to act for a client, so a client count reflects the book a firm registers someone against rather than the accounts they personally run. At firms that name their whole roster on every registration, most of the roster carries most of the firm's book; at firms that register selectively, individual counts are much lower. Read this table as who is registered most widely, not as who is busiest.
Brian David Ballard, named alongside 322 clients across 2025 LDA registrations.
Not necessarily. An LDA registration names every lobbyist expected to act for a client, so the count reflects the book a firm registers someone against rather than the accounts they personally run. Firms that name their whole roster on each registration produce high individual counts; firms that register selectively produce low ones.
From lobbying disclosures filed with the Clerk of the House and the Secretary of the Senate under the Lobbying Disclosure Act. Legis1 parses each filing — registrant, client, named lobbyists, issue codes and reported amount — and aggregates them into this table.
It covers the full 2025 disclosure year and was captured from the filing record on June 24, 2026. Lobbying disclosures are filed quarterly, so the table changes when a quarter closes rather than continuously.
Filings are amended after the fact, publishers differ on how they consolidate subsidiaries and affiliated entities, and an organization that both retains outside firms and reports its own in-house spend can be counted more than one way. Two sources reading the same filings under different rules will not agree exactly.