All lobbying filings

THORN RUN PARTNERS

Lobbying for ANTHROPIC PBC · AI safety and research company.

Filing 1st Quarter - Report

Reporting period

1st Quarter 2026

Jan 1 - Mar 31 · Posted Apr 18, 2026

Income

$50,000.00

What the client paid this registrant for the period.

Client based in

California

Official filing document

Lobbyists on this filing 1

STUART CHAPMAN

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.

Government bodies contacted 2

HOUSE OF REPRESENTATIVES
SENATE

The chambers, agencies and offices the filer named. It does not say who inside them was contacted, or when.

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.