Hazen Clay Marshall is named as a lobbyist on federal disclosure filings for 29 clients through Marshall & Popp, LLC. The most recent filing naming them posted in October 2026. Issues reported include Pharmacy, Trade (domestic/foreign), Taxation/Internal Revenue Code and Copyright/Patent/Trademark.
Filers must list covered executive or legislative branch positions held. As filed:
| Client | Registrant | Latest | Issues |
|---|---|---|---|
| VERTEX PHARMACEUTICALS INCORPORATED | MARSHALL & POPP, LLC | Q3 2026 | Trade (domestic/foreign), Budget/Appropriations, Taxation/Internal Revenue Code |
| SUN PHARMACEUTICAL INDUSTRIES, INC. | MARSHALL & POPP, LLC | Q3 2026 | Trade (domestic/foreign), Pharmacy |
| SANOFI U.S. SERVICES, INC. | MARSHALL & POPP, LLC | Q3 2026 | Trade (domestic/foreign), Budget/Appropriations, Taxation/Internal Revenue Code |
| PHARMACEUTICAL RESEARCH AND MANUFACTURERS OF AMERICA | MARSHALL & POPP, LLC | Q3 2026 | Trade (domestic/foreign), Pharmacy, Copyright/Patent/Trademark |
| PFIZER, INC. | MARSHALL & POPP, LLC | Q3 2026 | Trade (domestic/foreign), Budget/Appropriations, Taxation/Internal Revenue Code |
| PERSONAL CARE PRODUCTS COUNCIL | MARSHALL & POPP, LLC | Q3 2026 | Animals, Consumer Issues/Safety/Products, Health Issues |
| JP MORGAN CHASE HOLDINGS, LLC | MARSHALL & POPP, LLC | Q3 2026 | Banking |
| JAZZ PHARMACEUTICALS, INC. AND ITS SUBSIDIARIES, INCLUDING GREENWICH BIOSCIENCES | MARSHALL & POPP, LLC | Q3 2026 | Trade (domestic/foreign), Health Issues, Budget/Appropriations |
| GRAIL, INC. | MARSHALL & POPP, LLC | Q3 2026 | Taxation/Internal Revenue Code, Medicare/Medicaid, Health Issues |
| GOOGLE CLIENT SERVICES LLC | MARSHALL & POPP, LLC | Q3 2026 | Trade (domestic/foreign), Labor Issues/Antitrust/Workplace, Taxation/Internal Revenue Code |
| GLAXOSMITHKLINE | MARSHALL & POPP, LLC | Q3 2026 | Trade (domestic/foreign), Pharmacy |
| GENENTECH, INC. | MARSHALL & POPP, LLC | Q3 2026 | Trade (domestic/foreign), Pharmacy, Copyright/Patent/Trademark |
| FGA ACTION, INC | MARSHALL & POPP, LLC | Q3 2026 | Taxation/Internal Revenue Code, Government Issues, Budget/Appropriations |
| FEDERATION OF AMERICAN HOSPITALS | MARSHALL & POPP, LLC | Q3 2026 | Taxation/Internal Revenue Code, Medicare/Medicaid, Budget/Appropriations |
| ELI LILLY AND COMPANY | MARSHALL & POPP, LLC | Q3 2026 | Budget/Appropriations, Taxation/Internal Revenue Code, Medicare/Medicaid |
| DAIICHI SANKYO, INC. | MARSHALL & POPP, LLC | Q3 2026 | Trade (domestic/foreign), Pharmacy |
| CSL BEHRING | MARSHALL & POPP, LLC | Q3 2026 | Trade (domestic/foreign), Pharmacy |
| BRISTOL-MYERS SQUIBB COMPANY | MARSHALL & POPP, LLC | Q3 2026 | Trade (domestic/foreign), Pharmacy |
| BRIDGEBIO PHARMA | MARSHALL & POPP, LLC | Q3 2026 | Budget/Appropriations, Taxation/Internal Revenue Code, Medicare/Medicaid |
| AMGEN USA INC. | MARSHALL & POPP, LLC | Q3 2026 | Trade (domestic/foreign), Pharmacy, Copyright/Patent/Trademark |
| ALTRIA CLIENT SERVICES | MARSHALL & POPP, LLC | Q3 2026 | Tobacco |
| AIRPORTS COUNCIL INTERNATIONAL - NORTH AMERICA | MARSHALL & POPP, LLC | Q3 2026 | Taxation/Internal Revenue Code, Aviation/Airlines/Airports |
| AICPA ASSOCIATION OF INTERNATIONAL CERTIFIED PROFESSIONAL ACCOUNTANTS | MARSHALL & POPP, LLC | Q3 2026 | Accounting, Taxation/Internal Revenue Code, Education |
| ABBVIE INC. | MARSHALL & POPP, LLC | Q3 2026 | Pharmacy |
| ABBOTT LABORATORIES | MARSHALL & POPP, LLC | Q3 2026 | Trade (domestic/foreign), Budget/Appropriations, Agriculture |
| CURIE BIO OPERATIONS, LLC | MARSHALL & POPP, LLC | Q2 2026 | Health Issues |
| VERIZON COMMUNICATIONS, INC. | MARSHALL & POPP, LLC | Q1 2026 | Telecommunications, Taxation/Internal Revenue Code, Budget/Appropriations |
| HOUSE RX, INC. | MARSHALL & POPP, LLC | Q4 2025 | Medicare/Medicaid |
| FORD MOTOR COMPANY | MARSHALL & POPP, LLC | Q1 2025 | Taxation/Internal Revenue Code, Automotive Industry, Trade (domestic/foreign) |
| Year | Clients | Registrants |
|---|---|---|
| 2026 | 27 | 1 |
| 2025 | 24 | 1 |
| Year | Items | Total |
|---|---|---|
| 2026 | 19 | $29K |
Pay is not disclosed for individual lobbyists. Filings do not confirm that records with the same name are one person, so this page may combine people who share the name Hazen Clay Marshall. See the Capitol Clarity rankings and method.