All lobbying filings

MARSHALL & POPP, LLC

Lobbying for GLAXOSMITHKLINE · Biopharmaceutical manufacturer.

Filing Registration

Reporting period

1st Quarter 2026

Jan 1 - Mar 31 · Posted Mar 9, 2026

Money reported

None

Registrations and no-activity reports carry no figure.

Client based in

District of Columbia

Official filing document

Lobbyists on this filing 2

MONICA POPP New on this filing

Previously held: Chief of Staff/Deputy Chief of Staff, Office of Senate Republican Whip John Cornyn; Professional Staff Member, U.S. House of Representatives-Energy & Commerce Committee; Legislative Assistant, Senator Jim DeMint
HAZEN CLAY MARSHALL New on this filing

Previously held: Policy Director-Senate Majority Leader Mitch McConnell; Staff Director, Senate Budget Committee-Senator Don Nickles; Deputy Chief of Staff/Economist, Office of Assistant Majority Leader-Senator Don Nickles; Legislative Assistant-Senator Don Nickles

A "covered position" is a government job the lobbyist held in the 20 years before registering, which the law requires them to name. See the revolving door for former members of Congress across all filings.

Lobbying activity 2

Pharmacy

Issues related to pharmaceutical manufacturing, drug pricing, trade and tariffs.

Trade (domestic/foreign)

Issues related to pharmaceutical manufacturing, drug pricing, trade and tariffs.

Foreign interests disclosed 1

Section 7 of the LD-2: foreign entities that own part of the client, paid toward this lobbying, or stand to benefit from it.

GSK PLC

United Kingdom · London · owns 100% of the client · contributed $0.00

Source: federal Lobbying Disclosure Act filing, reproduced as filed. Bills are parsed from the activity descriptions.