ADK Holdings Inc.d/b/a ADK is a Japanese advertising agency. Headquartered in the Toranomon Hills building complex in Minato, Tokyo since June 2014 (previously in Tsukiji, Chūō, Tokyo), the firm is Japan's third largest advertising agency after Dentsu and Hakuhodo.The agency has 80 offices in over 20 countries. One, Asatsu-DK Europe, was established in 1993 in Amsterdam, Netherlands. Bain Capital has owned the company since 2018.

株式会社ASATSU-DK（简称ADK）是一家日本广告公司。自2014年6月起，总部设在东京都港湾的鸟门山建筑群内（之前在东京都中区筑地），是日本第三大广告公司，仅次于电通和博报堂。该公司在20多个国家设有80个办事处。其中，Asatsu-DK欧洲公司于1993年在荷兰阿姆斯特丹成立。贝恩资本自2018年起拥有该公司。