Lobbying firms
Every registrant in the lobbying register: firms that lobby for clients, organizations that register to lobby for themselves, and self-employed lobbyists.
203
firms under O
| Firm | Location | Years active |
|---|---|---|
| O'BRIEN DC | Washington, DC | Active 2008–2014 |
| O'CONNELL & DEMPSEY, LLC | Washington, DC | Active 2015–2026 |
| O'DONNELL & ASSOCIATES LLC | Albany, NY | Active 2021–2024 |
| O'DONNELL ADVOCACY SOLUTIONS | Bolingbrook, IL | Active 2021–2022 |
| O'DONNELL SCHWARTZ & ANDERSON, P.C. | WASHINGTON, DC | Active 2007–2014 |
| O'DONOGHUE & O'DONOGHUE LLP | Washington, DC | Active 2007–2016 |
| O'DONOVAN STRATEGIES, LLC | Washington, DC | Active 2012–2021 |
| O'HARA FEDERAL STRATEGIES, LLC | Washington, DC | Active 2011–2024 |
| O'HARE INFRASTRUCTURE STRATEGIES LLC | Arlington, VA | Active 2018–2025 |
| O'KEEFFE GLOBAL ADVISORS LLC | Addison, TX | Active 2019 |
| O'KEEFFE SHAHMORADI STRATEGIES, LLC | Washington, DC | Active 2018–2026 |
| O'KEEFFE STRATEGIES, LLC | Washington, DC | Active 2013–2019 |
| O'MELVENY & MYERS LLP | Washington, DC | Active 2007–2009 |
| O'NEIL BRADLEY CONSULTING LLC | Springfield, VA | Active 2023–2026 |
| O'NEILL AND ASSOCIATES | Boston, MA | Active 2007–2026 |
| O'NEILL, ATHY & CASEY, P.C. | Washington, DC | Active 2007–2026 |
| O'ROURKE & NAPPI, LLP | Washington, DC | Active 2014–2021 |
| O'ROURKE AND ASSOCIATES, LLC | Washington, DC | Active 2019–2024 |
| OAK FEDERAL SOLUTIONS, LLC | Falls Church, VA | Active 2017–2020 |
| OAK GROVE STRATEGIES | Birmingham, AL | Active 2020–2026 |
| OAK HEALTH STRATEGIES LLC | McLean, VA | Active 2014–2015 |
| OAK RIDGE ASSOCIATED UNIVERSITIES, INC. | Oak Ridge, TN | Active 2016–2026 |
| OAK STREET HEALTH | Chicago, IL | Active 2021–2023 |
| OAKLEY CAPITOL CONSULTING LLC | Vonore, TN | Active 2012–2026 |
| OAKLEY NETWORKS INC. | FALLS CHURCH, VA | Active 2007 |
| OATH INC. AND VARIOUS SUBSIDIARIES | Washington, DC | Active 2007–2021 |
| OATLY, INC. | Philadelphia, PA | Active 2023–2026 |
| OB-GYNS FOR WOMEN'S HEALTH | WASHINGTON, DC | Active 2007–2009 |
| OBADAL, FILLER, MACLEOD & KLEIN, P.L.C. | ALEXANDRIA, VA | Active 2007–2026 |
| OBER, KALER, GRIMES & SHRIVER | Baltimore, MD | Active 2007–2008 |
| OBERMAYER REBMANN MAXWELL & HIPPEL LLP | Philadelphia, PA | Active 2008–2012 |
| OBERWETTER& COMPANY, LLC | Dallas, TX | Active 2008–2009 |
| OBSIDIAN STRATEGISTS LLC | New York, NY | Active 2022–2023 |
| OCAL LOBBYING GROUP | Cedartown, GA | Active 2021–2026 |
| OCCIDENTAL CHEMICAL CORPORATION | Dallas, TX | Active 2026 |
| OCCIDENTAL PETROLEUM CORPORATION | WASHINGTON, DC | Active 2007–2026 |
| OCEAN CHAMPIONS | Capitola, CA | Active 2007–2019 |
| OCEAN CONSERVANCY | Washington, DC | Active 2007–2026 |
| OCEAN SAFARI LOGISTICS | College Park, MD | Active 2010–2014 |
| OCEAN SPRAY CRANBERRIES, INC | Lakeville-Middleboro, MA | Active 2021–2026 |
| OCEANA, INC. | WASHINGTON, DC | Active 2007–2026 |
| OCEANS & INTERNATIONAL | ALEXANDRIA, VA | Active 2007–2011 |
| OCEANTIC NETWORK | Baltimore, MD | Active 2025–2026 |
| OCHIN INC. | Sausalito, CA | Active 2017–2026 |
| OCHSNER CLINIC FOUNDATION | NEW ORLEANS, LA | Active 2007–2026 |
| OCULUS STRATEGIES, LLC | Manassas, VA | Active 2022–2026 |
| ODAWI LAW PLLC | Jimersontown, Seneca Nation, NY | Active 2021–2026 |
| ODENDAHL STRATEGIES LLC | washington, DC | Active 2020–2022 |
| ODONNELL & SON LLC | Washington, DC | Active 2016–2026 |
| OFF HILL STRATEGIES L.L.C. | St. Petersburg, FL | Active 2014–2026 |
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.