All lobbying filings

THORN RUN PARTNERS

Lobbying for ANTHROPIC PBC · AI safety and research company.

Filing Registration

Reporting period

4th Quarter 2025

Oct 1 - Dec 31 · Posted Jan 19, 2026

Money reported

None

Registrations and no-activity reports carry no figure.

Client based in

California

Official filing document

Lobbyists on this filing 1

STUART CHAPMAN New on this filing

Previously held: Chief of Staff, Representative Carolyn McCarthy; Chief of Staff, Representative Zack Space; Press Secretary, Senator Jay Rockefeller; Press Secretary, Representative Barbara Lee

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 1

Computer Industry

Artificial intelligence (AI) safety initiatives.

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