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 |
|---|---|---|
| OMP STRATEGY & ADVOCACY GROUP | Chicago, IL | Active 2023 |
| ON DECK CAPITAL, INC | New York, NY | Active 2019–2020 |
| ON THE LEVEL, INC. | Washington, DC | Active 2013–2015 |
| ONCOLOGY NURSING SOCIETY | Pittsburgh, PA | Active 2008–2024 |
| ONE ACTION | Washington, DC | Active 2010–2025 |
| ONE CAMPAIGN | Washington, DC | Active 2009–2010 |
| ONE HOPE UNITED | CHICAGO, IL | Active 2007–2014 |
| ONE TREE STRATEGIES, LLC | Alexandria, VA | Active 2015–2016 |
| ONEAL, JOHN FRANKLIN | WASHINGTON, DC | Active 2007 |
| ONEBRIEF, INC. | Honolulu, HI | Active 2025–2026 |
| ONEMAIN HOLDINGS, INC. | Evansville, IN | Active 2018–2026 |
| ONEOK INC. | Tulsa, OK | Active 2019–2026 |
| ONEPOINT PUBLIC & PRIVATE SOLUTIONS, LLC | Philadelphia, PA | Active 2010–2013 |
| ONFIDO INC. | Camden, DE | Active 2021–2023 |
| ONMESSAGE PUBLIC STRATEGIES | Alexandria, VA | Active 2023–2026 |
| ONPOINT STRATEGIES | Fayetteville, PA | Active 2009–2019 |
| ONTRACKAMERICA | Philadelphia, PA | Active 2007–2010 |
| ONYX PHARMACEUTICALS | Washington, DC | Active 2012–2013 |
| OPASTCO | WASHINGTON, DC | Active 2007–2012 |
| OPEN INTERNET COALITION | Washington, DC | Active 2007–2012 |
| OPEN POLICY ASSOCIATION | Arlington, VA | Active 2026 |
| OPEN SOCIETY ACTION FUND | Washington, DC | Active 2007–2025 |
| OPEN SPACE INSTITUTE, INC. | New York, NY | Active 2009–2026 |
| OPENAI OPCO, LLC | San Francisco, CA | Active 2023–2026 |
| OPERA AMERICA | New York, NY | Active 2007–2026 |
| OPPEL, GOLDBERG & SAENZ, P.L.L.C. | Houston, TX | Active 2007 |
| OPPORTUNITY AMERICA INC. | Washington, DC | Active 2014–2023 |
| OPPORTUNITY FINANCE NETWORK | Washington, DC | Active 2007–2026 |
| OPPORTUNITY FINANCIAL, LLC | Chicago, IL | Active 2019–2026 |
| OPTICAL SOCIETY OF AMERICA | Washington, DC | Active 2007–2022 |
| OPTICIANS ASSOCIATION OF AMERICA | Lakeland, TN | Active 2007–2009 |
| OPTIM GROUP, LLC | San Juan, PR | Active 2009–2015 |
| OPTIVER SERVICES US LLC | Chicago, IL | Active 2024–2026 |
| ORACLE CERNER (FORMERLY CERNER CORPORATION) | Kansas City, MO | Active 2007–2022 |
| ORACLE CORPORATION | Austin, TX | Active 2007–2026 |
| ORANO USA LLC (FORMERLY KNOWN AS AREVA NUCLEAR MATERIALS LLC) | Bethesda, MD | Active 2017–2026 |
| ORASURE TECHNOLOGIES, INC | BETHLEHEM, PA | Active 2007–2008 |
| ORBITAL ATK, INC. | Dulles, VA | Active 2007–2018 |
| ORBITAL SCIENCES CORPORATION | DULLES, VA | Active 2007–2015 |
| ORBITZ WORLDWIDE | Chicago, IL | Active 2007–2015 |
| ORCHARD THERAPEUTICS NORTH AMERICA | Boston, MA | Active 2024–2026 |
| OREGON FARM BUREAU FEDERATION | Salem, OR | Active 2007–2022 |
| OREGON HEALTH & SCIENCE UNIVERSITY | PORTLAND, OR | Active 2007–2026 |
| OREGON STATE UNIVERSITY | CORVALLIS, OR | Active 2007–2026 |
| OREXIGEN THERAPEUTICS, INC. | La Jolla, CA | Active 2011–2014 |
| ORGANIC TRADE ASSOCIATION | Washington, DC | Active 2007–2026 |
| ORGANIZATION MANAGEMENT GROUP (DBA LEGISLATIVE STRATEGIES GROUP) | Richmond, VA | Active 2019–2026 |
| ORGANOGENESIS INC. | Canton, MA | Active 2013–2026 |
| ORGANON & CO. | Jersey City, NJ | Active 2021–2026 |
| ORGANOVO, INC. | San Diego, CA | Active 2016–2017 |
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.