Gibson, Dunn & Crutcher advised Vivendi in connection with the French communications giant’s sale of 41.5 million common-stock shares of videogame maker Activision Blizzard, half of the 11.6 percent stake it still held in the company, for more than $850 million.

Santa Monica-based Activision Blizzard, which produces the popular Call of Duty and World of Warcraft lines and several other top-selling interactive games around the world, said it would not receive any of the proceeds of the sale.

Gibson Dunn partner Mark Lahive from the law firm’s Century City, Calif., office is leading the firm’s team for Vivendi in the share sale, which was executed via a public offering on May 28. Assisting Lahive were corporate partners Peter Wardle in Los Angeles and Ariel Harroch in Paris and corporate associates Maricel Montano in Los Angeles and Judith Raoul-Bardy in Paris, according to a spokeswoman for the firm.

Vivendi did not identify the party or parties that bought the shares.

Cahill Gordon & Reindel represented Barclays and Credit Suisse in their roles as financial underwriters in the public offering.

Cahill corporate partners Douglas Horowitz, Timothy Howell and Daniel Zubkoff led the team in New York. The other lawyers from the firm working on the matter are associates Lisa Collier, Ariel Goldman and Caitlin O’Hern. Cahill previously represented the administrative agent and lead arrangers in connection with a $2.25 billion term loan and the $250 million revolving credit facility secured by Activision Blizzard last year.