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 |
|---|---|---|
| MASSACHUSETTS MEDICAL SOCIETY | WALTHAM, MA | Active 2007–2026 |
| MASSACHUSETTS MUTUAL LIFE INSURANCE COMPANY | SPRINGFIELD, MA | Active 2007–2026 |
| MASTERCARD WORLDWIDE | WASHINGTON, DC | Active 2007–2026 |
| MATCH GROUP, INC. | Dallas, TX | Active 2019–2026 |
| MATERIALS RESEARCH SOCIETY | Washington, DC | Active 2014–2022 |
| MATHIS STRATEGIES | NEW YORK, NY | Active 2015–2023 |
| MATSON NAVIGATION COMPANY, INC. | WASHINGTON, DC | Active 2007–2009 |
| MATTEL, INC | EL SEGUNDO, CA | Active 2007–2009 |
| MATTHEW B. DEMPSEY PUBLIC AFFAIRS CONSULTING GROUP | TALLAHASSEE, FL | Active 2007–2008 |
| MATTHEW CREGOR | Dorchester, MA | Active 2010 |
| MATTHEW MCGOVERN | Shorewood, WI | Active 2021–2022 |
| MATTHEW VENO | SALEM, MA | Active 2007–2008 |
| MATTHEW VIRKSTIS | Falls Church, VA | Active 2016–2017 |
| MATTOON & ASSOCIATES, LLC | Falls Church, VA | Active 2007–2026 |
| MATTOX WOOLFOLK, LLC | Washington, DC | Active 2007–2014 |
| MATZ BLANCATO & ASSOC INC | WASHINGTON, DC | Active 2008 |
| MATZ, BLANCATO AND ASSOCIATES INC. | Washington, DC | Active 2019–2023 |
| MAURA MELLEY | Tenants Harbor, ME | Active 2007–2009 |
| MAVEN ADVOCACY PARTNERS LLC | Austin, TX | Active 2025–2026 |
| MAVEN, INC. | Philadelphia, PA | Active 2007–2026 |
| MAVERICK HILL PARTNERS | Annandale, VA | Active 2026 |
| MAVERICK STRATEGIES, LLC | Annandale, VA | Active 2022–2026 |
| MAX BURNS | New York, NY | Active 2021–2022 |
| MAX CLELAND, LLC | ATLANTA, GA | Active 2007–2008 |
| MAXAR TECHNOLOGIES HOLDINGS INC. F/K/A SSL MDA HOLDINGS, INC. | San Francisco, CA | Active 2017 |
| MAXIM HEALTHCARE SERVICES, INC. | Columbia, MD | Active 2014–2016 |
| MAXIMILIANO SEVILLIA | Washington, DC | Active 2007 |
| MAXIMUS, INC. | McClean, VA | Active 2008–2026 |
| MAXWELL & MILDER | ALEXANDRIA, VA | Active 2007–2009 |
| MAXWELL CREEK STRATEGIC CONSULTING LLC | Great Falls, VA | Active 2026 |
| MAY GROUP LLC | Rehoboth Beach, DE | Active 2011–2018 |
| MAYBERRY & ASSOCIATES, LLC | FALLS CHURCH, VA | Active 2007–2009 |
| MAYBROOK GLOBAL GROUP LLC | Washington, DC | Active 2018 |
| MAYER BROWN LLP | Washington, DC | Active 2007–2026 |
| MAYFORTH GROUP, LLC. | Providence, RI | Active 2007–2026 |
| MAYNARD NEXSEN PC | Birmingham, AL | Active 2007–2026 |
| MAYNOR & STIERS, LLC | Huntsville, AL | Active 2022–2026 |
| MAYNOR LLC | GURLEY, AL | Active 2007–2023 |
| MAYO CLINIC | Rochester, MN | Active 2008–2026 |
| MAZDA MOTOR OF AMERICA DBA MAZDA NORTH AMERICAN OPERATIONS | WASHINGTON, DC | Active 2007–2026 |
| MAZON: A JEWISH RESPONSE TO HUNGER | Sherman Oaks, CA | Active 2025–2026 |
| MBDA INCORPORATED | Arlington, VA | Active 2009–2026 |
| MBT LLC | Annapolis, MD | Active 2008 |
| MCAFEE, INC. | SANTA CLARA, CA | Active 2007–2014 |
| MCAFEE, LLC | Santa Clara, CA | Active 2017–2021 |
| MCALLISTER & QUINN, LLC | Washington, DC | Active 2007–2026 |
| MCAPITOL MANAGEMENT | Washington, DC | Active 2007–2015 |
| MCB CONSULTING, INC. | Southampton, NY | Active 2020–2026 |
| MCB CONSULTING, LLC | Falls Church, VA | Active 2014–2017 |
| MCBRIDE CONSULTING & BUSINESS DEVELOPMENT GROUP | Babylon, NY | Active 2025–2026 |
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.