Lobbying firms
Every registrant in the lobbying register: firms that lobby for clients, organizations that register to lobby for themselves, and self-employed lobbyists.
12,255
registrants, A to Z
| Firm | Location | Years active |
|---|---|---|
| TRANSPARENCY INTERNATIONAL U.S. (A PROJECT OF THE FUND FOR CONSTITUTIONAL GOVT) | Washington, DC | Active 2022–2026 |
| TRANSPORT WORKERS UNION OF AMERICA, AFL-CIO | Washington, DC | Active 2007–2026 |
| TRANSPORT WORKERS' UNION - LOCAL 234 | Philadelphia, PA | Active 2009 |
| TRANSPORTATION COMMUNICATIONS NATIONAL UNION/IAM (FKA TRANSPORTATION COMMUNICATI | ROCKVILLE, MD | Active 2007–2026 |
| TRANSPORTATION INSTITUTE | CAMP SPRINGS, MD | Active 2007–2011 |
| TRANSPORTATION INTERMEDIARIES ASSOCIATION | ALEXANDRIA, VA | Active 2007–2026 |
| TRANSPORTATION TRADES DEPARTMENT, AFL-CIO | WASHINGTON, DC | Active 2007–2026 |
| TRAPHAGEN LAW PLLC | WASHINGTON, DC | Active 2007–2008 |
| TRAUTWEIN & ASSOCIATES, LLC | Burke, VA | Active 2020–2025 |
| TRAVAGLINI SCORZONI KILEY LLC | Boston, MA | Active 2020–2022 |
| TRAVAGLINI, EISENBERG & KILEY LLC | Boston, MA | Active 2010–2019 |
| TRAVEL BUSINESS ROUNDTABLE | WASHINGTON, DC | Active 2007–2008 |
| TRAVEL GOODS ASSOCIATION | PRINCETON, NJ | Active 2007–2008 |
| TRAVEL TECH: THE TRAVEL TECHNOLOGY ASSOCIATION | Arlington, VA | Active 2012–2025 |
| TRAVELPORT OPERATIONS, INC. | Atlanta, GA | Active 2008–2024 |
| TRAVERE THERAPEUTICS | San Diego, CA | Active 2016–2026 |
| TREA SENIOR CITIZENS LEAGUE | Alexandria, VA | Active 2007–2026 |
| TREATED WOOD COUNCIL | WASHINGTON, DC | Active 2007–2026 |
| TREFOIL SOLUTIONS, INC | Chevy Chase, DC | Active 2009–2014 |
| TRELLIX (FORMERLY MUSARUBA US LLC) | MCLEAN, VA | Active 2021–2026 |
| TREME CONSULTING, LLC | North Las Vegas, NV | Active 2020–2021 |
| TREMONT PUBLIC ADVISORS, LLC | Hartford, CT | Active 2010–2020 |
| TREMONT STRATEGIES GROUP LLC | Boston, MA | Active 2007–2026 |
| TRESS CAPITOL ADVISORS | Glenmont, NY | Active 2022 |
| TREWADET LAW | Washington, DC | Active 2023–2026 |
| TRI-BRANCH RESOLUTION, LLC | Annapolis, MD | Active 2025 |
| TRI-CITY INDUSTRIAL DEVELOPMENT COUNCIL | KENNEWICK, WA | Active 2007 |
| TRI-STATE GENERATION AND TRANSMISSION ASSOCIATION, INC. | Denver, CO | Active 2007–2026 |
| TRIAD STRATEGIES, LLC. | HARRISBURG, PA | Active 2007–2026 |
| TRIADVOCATES LLC | Washington, DC | Active 2007–2009 |
| TRIANGLE ASSOCIATES, INC. | Alexandria, VA | Active 2007–2026 |
| TRIANGLE2 PARTNERS | Falls Church, VA | Active 2007–2008 |
| TRIANGULATION STRATEGIES, LLC | Delray Beach, FL | Active 2011 |
| TRIBUNE MEDIA COMPANY | Chicago, IL | Active 2007–2017 |
| TRIBUTARY LLP | Arlington, VA | Active 2007–2026 |
| TRICIDA INC. | South San Francisco, CA | Active 2020–2022 |
| TRILLIGENT LLC | Washington, DC | Active 2025–2026 |
| TRILOGY ADVISORS LLC | Washington, DC | Active 2009–2026 |
| TRIMPA GROUP, LLC | Denver, CO | Active 2011–2023 |
| TRINET GROUP INC. | Dublin, CA | Active 2014–2026 |
| TRINITY HEALTH | Livonia, MI | Active 2007–2026 |
| TRINITY INDUSTRIES, INC | Dallas, TX | Active 2007–2026 |
| TRIOPTIMA AB | Stockholm, Sweden | Active 2011–2021 |
| TRIPACER STRATEGIC CONSULTING L.L.C. | Washington, DC | Active 2020–2026 |
| TRIPADVISOR LLC | NEEDHAM, MA | Active 2019–2026 |
| TRIPLE P AMERICA | Columbia, SC | Active 2021–2026 |
| TRIPP HOLLANDER ADVISORS | Chevy Chase, MD | Active 2025–2026 |
| TRISTATE STRATEGIES | Bethlehem, PA | Active 2012–2013 |
| TRIUMPH GROUP, INC | Berwyn, PA | Active 2007–2021 |
| TRIUMPH STRATEGIES | SCOTTSDALE, AZ | Active 2007 |
Names and addresses as the register lists them. Years active spans the first and latest year of any filing by the registrant, including registrations and amendments.