1939 Hotel & Travel Index is launched by Elwood Ingledue
1952 Successful Meetings magazine is launched by Phil Harrison, Founder, Bill Brothers Publishers (later Bill Communications).
1958 Travel Weekly is launched in New York City by Irwin Robinson, combining two previous publications, Travel Items and Travel Courier.
1960 Sloane Travel Agency Reports, later known as STAR Service, is founded in West Hartford, Connecticut, by Bob Sloane, a syndicated travel columnist.
1966 Gellert-Wolfman Publishing Corp. in New York begins publishing Meetings & Conventions.
1966-68 Ziff-Davis buys Travel Weekly and Hotel & Travel Index.
1969 TravelAge West is launched in New York City by Martin Deutsch, editorial director, with Robert Parrish as publisher.
1977 Meeting News is launched by co-founders Peter Shure, Arthur Hyman and Larry Gralla of Gralla Publishing.
1984 CMP launches Business Travel News. Rupert Murdoch buys Ziff-Davis' travel-related brands, including Travel Weekly, Hotel and Travel Index, Official Hotel & Resort Guide and Meetings & Conventions, grouping them under the Murdoch Magazines umbrella.
1986 Weissmann Travel Reports is founded by Arnie Weissmann in Austin, Texas.
1989 Reed International creates Reed Travel Group via its acquisition of Travel Weekly, Meetings & Conventions and the hotel databases from Murdoch Magazines.
1996 Reed Elsevier buys Weissmann Travel Reports from Arnie Weissmann.
1998 Reed Elsevier restructures the Reed Travel Group as Cahners Travel Group within Cahners Business Information.
2001 Boston Ventures purchases Northstar Travel Group (formerly Cahners Travel Group) from Reed Elsevier.
2003 Northstar launches Intelliguide Corporate.
2009 Tom Kemp joins NTG as Chairman and CEO
2009 Northstar acquires The Original Home-Based Travel Agent Show and Conference from Real Trade Shows, Inc.
2010 Northstar acquires five media brands from The Neilsen Company's Business Media Travel Group.
2010 Travel Weekly launches the CruiseWorld and LeisureWorld tradeshows for travel agents. Northstar acquires ProMedia.travel, publisher of The Beat, Procurement.travel, Management.travel and The Transnational.
2011 Northstar acquires PhoCusWright, the premier publisher of independent travel and tourism research and the producer of the PhoCusWright Conference. Northstar launches Marketing Solutions.
2012 Northstar Travel Group acquired by Wicks Group. BV Investment Partners completes sale to the Wicks Group of Companies.
2013 Northstar Meetings Group partners with Zentila to offer dynamic sourcing and booking on facility search site.
2013 Northstar Travel Group acquires Your Travel Insider.
2014 2014 Northstar Travel Group acquires Travel Weekly China, Travel Weekly Asia, and Events China from Contineo Media, a multi-platform information provider based in Singapore, with locations in Beijing and Shanghai.
2014 Northstar Travel Group acquires Asia's leading online travel content brand, Web In Travel.
2014 Northstar Travel Group acquires leading mountain travel event, Mountain Travel Symposium.
2014 Northstar Travel Group acquires majority stake in leading e-commerce booking technology company, Inntopia Inc.
2014 Northstar Travel Group acquires Data Swell, an aggregator of public and private travel industry data and business analytics tools.
2016 Northstar Travel Group transforms into the world's leading B2B information, business intelligence, commerce and events platform serving the global travel and meetings industry.
2016 Northstar Travel Group acquired by Wasserstein Partners.