Launched in Paris in 2004 by Loic and Geraldine Le Meur, Le Web brings together internet companies and figureheads.
Previous attendees include Google, Wildfire and Badoo, whose presence was organised by Brand Fuel.
In addition to its annual Paris gathering, Le Web also launched a London event in June 2012.
Reed Midem CEO Paul Zilk said: "Le Web fits very well with Reed Midem. We share the same ambition for developing premium international events where participants network and build relationships, do business, launch new products and discover the latest innovations.
"Loic and Geraldine Le Meur are true international internet entrepreneurs and they have done an outstanding job in building LeWeb. Thanks to their expertise and Reed Midem’s strength in international events, I am convinced that together we will take LeWeb to new heights.
Le Web Paris was held December 4-6, 2012, attended by 3,500 delegates from 75 countries. Le Web London is scheduled for June 5-6, 2013.