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 |
|---|---|---|
| ORICA AUSTRALIA PTY LTD | East Melbourne, Australia | Active 2025–2026 |
| ORIGIN ADVOCACY LLC | Arlington, VA | Active 2022–2026 |
| ORIGIN MATERIALS OPERATING, INC. | West Sacramento, CA | Active 2022–2024 |
| ORION ADVOCATES | Washington, DC | Active 2008–2026 |
| ORION STRATEGIES | Washington, DC | Active 2021–2026 |
| ORION STRATEGIES LLC | Washington, DC | Active 2007–2014 |
| ORKIN EXTERMINATING CO | ATLANTA, GA | Active 2007 |
| ORLANDO HEALTH | Orlando, FL | Active 2024–2026 |
| ORLIE YANIV STRATEGIES LLC | Washington, DC | Active 2016–2020 |
| OROURKE, RITA CONSULTING | VIRGINIA BEACH, VA | Active 2007 |
| ORRICK, HERRINGTON & SUTCLIFFE LLP | Washington, DC | Active 2007–2026 |
| ORSO GROUP | Silver Spring, MD | Active 2026 |
| ORSTED NORTH AMERICA, INC. | Boston, MA | Active 2017–2026 |
| OSA CONSULTING LLC | SILVER SPRING, MD | Active 2022–2024 |
| OSBORNE CONSULTING, INC. | Ashburn, VA | Active 2007–2011 |
| OSCAR MANAGEMENT CORPORATION | New York, NY | Active 2025–2026 |
| OSCAR POLICY GROUP, LLC | Washington, DC | Active 2021–2026 |
| OSF HEALTHCARE SYSTEM | PEORIA, IL | Active 2007–2026 |
| OSHANA STRATEGIC CONSULTING | Washington, DC | Active 2008 |
| OSHKOSH CORPORATION | Oshkosh, WI | Active 2025–2026 |
| OSI PHARMACEUTICALS, INC. | Ardsley, NY | Active 2009–2010 |
| OSIRIS THERAPEUTICS | Columbia, MD | Active 2015 |
| OSTROFF ASSOCIATES, INC. | Albany, NY | Active 2024–2026 |
| OTHRAM, INC. | The Woodlands, TX | Active 2022–2025 |
| OTSUKA AMERICA PHARMACEUTICAL, INC. | Rockville, MD | Active 2013–2026 |
| OTSUKA PHARMACEUTICAL DEVELOPMENT & COMMERCIALIZATION, INC. | Rockville, MD | Active 2015 |
| OTT BIELITZKI & O'NEILL PLLC | Washington, DC | Active 2015–2026 |
| OTTERSON LLC | Alexandria, VA | Active 2009–2026 |
| OTTO REICH ASSOCIATES, LLC | Coral Gables, FL | Active 2007–2020 |
| OTTO WEIGL | Alexandria, VA | Active 2014–2015 |
| OTTOSEN & ASSOCIATES | FAIRFAX STATION, VA | Active 2007–2012 |
| OUR CHILDREN'S TRUST | Eugene, OR | Active 2020–2026 |
| OURARING INC. | San Francisco, CA | Active 2025–2026 |
| OUTDOOR ADVERTISING ASSOCIATION OF AMERICA, INC. | WASHINGTON, DC | Active 2007–2026 |
| OUTDOOR INDUSTRY ASSOCIATION | Boulder, CO | Active 2007–2026 |
| OUTDOOR POWER EQUIPMENT INSTITUTE, INC. | ALEXANDRIA, VA | Active 2007–2010 |
| OUTLOOK LAW, LLC | Anchorage, AK | Active 2019 |
| OUTOKUMPU STAINLESS USA, LLC | Calvert, AL | Active 2025–2026 |
| OUTSET MEDICAL | San Jose, CA | Active 2019–2022 |
| OVARIAN CANCER NATIONAL ALLIANCE | Washington, DC | Active 2007–2016 |
| OVARIAN CANCER RESEARCH FUND ALLIANCE | Washington, DC | Active 2016–2026 |
| OVERTON GROUP, INC. | Kansas City, MO | Active 2008–2015 |
| OVINTIV INC. | Denver, CO | Active 2017–2026 |
| OWEN EVANS INGOLS | Washington, DC | Active 2007–2026 |
| OWENS CORNING | Toledo, OH | Active 2007–2026 |
| OWENS-ILLINOIS, INC | ARLINGTON, VA | Active 2007–2019 |
| OWENS, DONALD | Fountain Hills, AZ | Active 2007 |
| OWNER-OPERATOR INDEPENDENT DRIVERS ASSOCIATION | GRAIN VALLEY, MO | Active 2007–2026 |
| OXBOW CARBON, LLC | WEST PALM BEACH, FL | Active 2011–2021 |
| OXFAM AMERICA, INC. | Boston, MA | Active 2007–2026 |
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.