Private company
Logo: Hill Holliday, Public domain, via Wikimedia Commons3
Marketing and communications agency
Hill Holliday (HH) is a marketing and communications agency based in Boston, Massachusetts with offices in New York City and Greenville, South Carolina. It is the 17th largest advertising agency in the U.S.2 Wikipedia text CC BY-SA 4.0
Last updated Oct 21, 2026.
See how the biggest companies compare on our leaderboards
Hill Holliday (HH) is a marketing and communications agency based in Boston, Massachusetts with offices in New York City and Greenville, South Carolina. It is the 17th largest advertising agency in the U.S.2
Hill Holliday was founded in Boston in 1968 as Hill, Holliday, Connors, Cosmopulos, Inc. by partners Jack Connors, Jay Hill, Steve Cosmopulos and Alan Holliday. It was acquired by IPG in 1998, and sold to Attivo in 2024.
From Wikipedia’s article on Hill Holliday, shared under CC BY-SA 4.0.4
The numbers on this page point here. Each one links to the record it came from.
