The story
1902: Alfred Erickson formed his own advertising agency in New York City.
1912: Harrison McCann, along with four partners, launches H. K. McCann Co, and introduces the credo "Truth Well Told".
1915: H. K. McCann Co., established a Canadian office in Toronto in 1915. An office in Montreal opened in 1918.
1920: McCann's "Truth Well Told" becomes the first service company emblem to receive intellectual property protection through the U.S. Copyright Office. The U.S. Patent Office, which had granted trademark protection only to manufacturers until then, then formally granted the slogan/logo trademark registration in January 1921.
1927: McCann opens offices in Paris, Berlin and London.
1930: McCann and Erickson merge companies.
1935: Latin American offices open in Buenos Aires and Rio de Janeiro.
1943: McCann New York hires Viennese psychology researchers Dr. Herta Herzog and Dr. Hans Zeisel, becoming "the first [agency] to hire psychological research staff"
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1947: The McCann-produced "Swift Home Service Club", with Tex McCrary and his wife Jinx Falkenburg, became the first regularly scheduled sponsored TV program on November 7, 1947, running on four NBC network stations.
1948: Marion Harper, Jr., at 32 years old, is named Harrison K. McCann's successor as president of the agency.
1949: McCann names four women as VPs: copy group heads Alberta Hays and Margot Sherman, account executive Florence Richards, and radio-TV department executive producer Dorothy Barstow McCann.
1955: Coca-Cola assigns its U.S. ad account to McCann as a plan to consolidate and integrate U.S. and international advertising.
1956: McCann began expansion outside of advertising by forming Communications Counselors, Inc. (CCI), an international PR company, and Marketing Planning Corp. (Marplan), a research organization.
1957: McCann became the first U.S. advertising agency to bill $100 million in TV and radio sales.
1958: McCann resigns larger Chrysler account in order to take on Buick and align with General Motors around the world.
1959: The Australian office opens, as well as European offices in Italy, Netherlands and Switzerland.
1960: The company is organised to four independent operating units reporting into McCann Erickson, Inc. (later to become the Interpublic Group in 1961). The Office opens in Japan.
1964: The Spanish government of Francisco Franco hired the agency to improve its image in the United States.
1973: McCann International and McCann US reunite into the single agency McCann Erickson Worldwide.
1992: McCann lost its largest customer, Coca-Cola.
1995: Acquired MacLaren Advertising in Canada from Lintas Worldwide, merging it with its existing Canadian subsidiary to become MacLaren McCann. It would be renamed McCann Canada in 2016.
1997: McCann Worldgroup formed, which includes: McCann Erickson Worldwide and what would become MRM//McCann, Momentum Worldwide, McCann Healthcare Worldwide, Weber Shandwick and FutureBrand.
1998, 1999 and 2000: McCann Erickson was named "Global Agency of the Year" by Adweek.
1998, McCann Erickson purchases Fitzgerald is & Company in Atlanta, and retains the Fitzgerald & Company moniker
2000: Coca-Cola returned as a customer with a new "groundbreaking contract, making McCann a marketing partner".
2012: Harris Diamond, previously CEO of Weber Shandwick and CEO of Interpublic Groups' Constituency Management Group, joins McCann Worldgroup as its new Chairman and CEO.
2013: General Motors' worldwide Chevrolet account is consolidated with the agency in Commonwealth//McCann.
2014: United//McCann is established to handle the worldwide Microsoft account.
2017: Adweek names McCann "Agency of the Year".
2018: Global Effie Effectiveness Index named McCann Most Effective Agency Network, and MRM//McCann is named Ad Ages' "2018 Business-to-Business Agency of the Year".
2020: Bill Kolb was promoted from chief operating officer to CEO.
2022: Bill Kolb steps down as CEO, remains as chairman and plans to appoint Daryl Lee as chief executive officer.
From Wikipedia’s article on McCann (company), shared under CC BY-SA 4.0.5