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 |
|---|---|---|
| CIVITAS PUBLIC AFFAIRS GROUP, LLC | Washington, DC | Active 2013–2025 |
| CJ LAKE, LLC | Washington, DC | Active 2007–2026 |
| CJW QUANTUM CONSULTING, LLC | Potomac, MD | Active 2022 |
| CLARENDON GROUP | Providence, RI | Active 2007–2008 |
| CLAREO | Fort Lauderdale, FL | Active 2024–2026 |
| CLARIFYD LLC | Washington, DC | Active 2021–2022 |
| CLARION MANAGEMENT RESOURCES | ALEXANDRIA, VA | Active 2007 |
| CLARIOS, LLC | Glendale, WI | Active 2026 |
| CLARISSA J MIDDLETON, LOBBYIST | HEPHZIBAH, GA | Active 2009–2026 |
| CLARITEV (FORMERLY MULTIPLAN CORPORATION) | McLean, VA | Active 2024–2026 |
| CLARITY CONSULTING, LLC | Alexandria, VA | Active 2020–2023 |
| CLARK & WEINSTOCK | Washington, DC | Active 2007–2011 |
| CLARK HILL PUBLIC STRATEGIES LLC | Washington, DC | Active 2022–2026 |
| CLARK HILL, PLC | Washington, DC | Active 2007–2026 |
| CLARK STREET ASSOCIATES | Los Altos, CA | Active 2020–2026 |
| CLARKE, DONALD H. | WASHINGTON, DC | Active 2007 |
| CLARKSON UNIVERSITY | Potsdam, NY | Active 2008–2015 |
| CLASSIFIED POLITICAL CONSULTANTS LLC. | memphis, TN | Active 2023–2026 |
| CLAUDIA SCHLOSBERG | Washington, DC | Active 2007–2011 |
| CLAUSE LAW P.L.L.C. | Washington, DC | Active 2018–2026 |
| CLAUSTEN LLC | Washington, DC | Active 2011–2026 |
| CLEAN AIR TASK FORCE, INC. | Boston, MA | Active 2008–2026 |
| CLEAN CLOUD AND WEATHER ACTION CORPORATION | DALLAS, TX | Active 2023–2026 |
| CLEAN DIESEL TECHNOLOGIES, INC. | Ventura, CA | Active 2012–2013 |
| CLEAN ENERGY BRIDGE, LLC | Fort Worth, TX | Active 2011–2012 |
| CLEAN ENERGY FUELS CORP | Newport Beach, CA | Active 2008–2018 |
| CLEAN FUELS ALLIANCE AMERICA F/K/A NATIONAL BIODIESEL BOARD | WASHINGTON, DC | Active 2007–2026 |
| CLEAN LINE ENERGY PARTNERS LLC | Houston, TX | Active 2015–2018 |
| CLEAN WATER COUNCIL | Fairfax, VA | Active 2008–2019 |
| CLEANCAPITAL HOLDINGS LLC | New York, NY | Active 2025–2026 |
| CLEANSPARK, INC | Henderson, NV | Active 2024–2026 |
| CLEARPATH ACTION FOR CONSERVATIVE CLEAN ENERGY, INC. | Washington, DC | Active 2016–2026 |
| CLEARSPEED INC. | San Diego, CA | Active 2025–2026 |
| CLEARWATER GROUP, LLC | Ridgeland, MS | Active 2025–2026 |
| CLEARY GOTTLIEB STEEN & HAMILTON LLP | New York, NY | Active 2007–2026 |
| CLEAVES BIOMASS SERVICES, LLC | Portland, ME | Active 2010–2020 |
| CLEMENT AND ASSOCIATES | Nashville, TN | Active 2008–2014 |
| CLEMENTI GOVERNMENT AFFAIRS, LLC | St. Charles, IL | Active 2014 |
| CLEMSON UNIVERSITY | Columbia, SC | Active 2009–2026 |
| CLERGY FINANCIAL STRATEGY AND TAX PLANNING INC | HAMPTON, VA | Active 2011–2026 |
| CLEVELAND CLINIC FOUNDATION | CLEVELAND, OH | Active 2007–2026 |
| CLEVELAND SOCIETY FOR THE BLIND | Cleveland, OH | Active 2008–2009 |
| CLEVELAND-CLIFFS INC. | CLEVELAND, OH | Active 2007–2026 |
| CLIFFORD CHANCE US LLP | New York, NY | Active 2011–2013 |
| CLIFFORD SMITH | Washington, DC | Active 2016–2017 |
| CLIFTON NICKLES | ROSEDALD, MD | Active 2011 |
| CLIMATE NEUTRAL BUSINESS NETWORK, A PROJECT OF SEA | Lake Oswego, OR | Active 2009–2017 |
| CLINE STRATEGIC CONSULTING, LLC | Charles Town, WV | Active 2019–2026 |
| CLINICOMP, INTERNATIONAL | San Diego, CA | Active 2010–2011 |
| CLMM & ASSOCIATES | FARGO, ND | Active 2007–2010 |
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.