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.

株式會社ASATSU-DK（簡稱ADK）是一家日本廣告公司。自2014年6月起，總部設在東京都港灣的鳥門山建筑群內（之前在東京都中區筑地），是日本第三大廣告公司，僅次于電通和博報堂。該公司在20多個國家設有80個辦事處。其中，Asatsu-DK歐洲公司于1993年在荷蘭阿姆斯特丹成立。貝恩資本自2018年起擁有該公司。