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 |
|---|---|---|
| HYMAN PHELPS & MCNAMARA | Washington, DC | Active 2013 |
| HYPERFOCAL COMMUNICATIONS, LLC | Houston, TX | Active 2022–2025 |
| HYPERLIQUID POLICY CENTER | Washington, DC | Active 2026 |
| HYUNDAI - KIA AMERICA TECHNICAL CENTER, INC. | WASHINGTON, DC | Active 2007–2016 |
| HYUNDAI MOTOR COMPANY | WASHINGTON, DC | Active 2007–2026 |
| HYZON MOTORS | Bolingbrook, IL | Active 2022 |
| I AM ALS | Washington, DC | Active 2025–2026 |
| I STREET ADVOCATES | Washington, DC | Active 2007–2026 |
| I. SAMUEL KAMINSKY | Chevy Chase, MD | Active 2008–2009 |
| IAC INC. (FORMERLY IAC/INTERACTIVECORP) | New York, NY | Active 2007–2026 |
| IAI NORTH AMERICA | Arlington, VA | Active 2019–2020 |
| IAN PFEIFFER GOVERNMENT RELATIONS | WASHINGTON, DC | Active 2007–2014 |
| IAN REID LLC | Washington, DC | Active 2021–2022 |
| IAP WORLDWIDE SERVICES, INC. | Cape Canaveral, FL | Active 2015–2016 |
| IBARRA STRATEGY GROUP | Washington, DC | Active 2007–2017 |
| IBEX2 SOLUTIONS, LLC | Alexandria, VA | Active 2022–2026 |
| ICAHN ASSOCIATES LLC | New York, NY | Active 2009–2010 |
| ICAP SERVICES NORTH AMERICA LLC (FORMERLY ICAP NORTH AMERICA, INC.) | Jersey City, NJ | Active 2011–2016 |
| ICE MILLER LLP | Indianapolis, IN | Active 2007–2026 |
| ICE MILLER STRATEGIES LLC | Washington, DC | Active 2007–2026 |
| ICE MILLER WHITEBOARD FORMERLY SZD WHITEBOARD | Columbus, OH | Active 2011–2020 |
| ICEBREAKER STRATEGIES, LLC | Alexandria, VA | Active 2023–2026 |
| ICO GLOBAL COMMUNICATIONS | WASHINGTON, DC | Active 2007–2009 |
| ICX TECHNOLOGIES | Arlington, VA | Active 2007–2008 |
| ID ANALYTICS, INC. | SAN DIEGO, CA | Active 2007–2009 |
| ID.ME, LLC | McLean, VA | Active 2021–2026 |
| IDACORP, INC | BOISE, ID | Active 2007–2026 |
| IDAHO TECHNOLOGY, INC. | Salt Lake City, UT | Active 2009–2011 |
| IDEMIA IDENTITY & SECURITY USA, LLC | Reston, VA | Active 2007–2026 |
| IDENTITY MATTERS, LLC | Washington, DC | Active 2007–2008 |
| IDT CORPORATION | NEWARK, NJ | Active 2007–2008 |
| IETAN CONSULTING, LLC | Tulsa, OK | Active 2007–2021 |
| IEX GROUP | New York, NY | Active 2022–2025 |
| IGGY VENTURES LLC | Garrett Park, MD | Active 2024–2026 |
| IGLOBAL EXPORTS LLC D/B/A ZONOS | St. George, UT | Active 2026 |
| IGM BIOSCIENCES, INC. | Mountain View, CA | Active 2021–2024 |
| IGT | RENO, NV | Active 2007–2009 |
| IHEARTMEDIA, INC. | Washington, DC | Active 2007–2026 |
| IKARIA | Hampton, NJ | Active 2011–2015 |
| IKON PUBLIC AFFAIRS | Philadelphia, PA | Active 2007–2026 |
| IKYR LLC | Alexandria, VA | Active 2022–2026 |
| ILEX GROUP | MCLEAN, VA | Active 2007 |
| ILLINOIS AGRICULTURAL ASSOCIATION | Bloomington, IL | Active 2008–2026 |
| ILLINOIS ASSOCIATION OF SCHOOL BOARDS | Springfield, IL | Active 2025–2026 |
| ILLINOIS COLLEGE OF OPTOMETRY | Chicago, IL | Active 2016–2018 |
| ILLINOIS GOVERNMENT CONSULTANTS INC | Chicago, IL | Active 2013 |
| ILLINOIS GOVERNMENTAL CONSULTING GROUP, LLC | Chicago, IL | Active 2008–2011 |
| ILLINOIS HEALTH & HOSPITAL ASSOCIATION (FORMERLY ILLINOIS HOSPITAL ASSOCIATION) | Naperville, IL | Active 2009–2026 |
| ILLINOIS INSTITUTE OF TECHNOLOGY | Chicago, IL | Active 2018–2026 |
| ILLINOIS MANUFACTURERS' ASSOCIATION | Springfield, IL | Active 2009–2011 |
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.