Facebook co-founder Dustin Moskovitz sells 450,000 shares

Facebook co-founder Dustin Moskovitz has shed 450,000 shares in the social network in recent days for about $8.7 million, according to a regulatory filing on Friday.

Moskovitz, 28, was Mark Zuckerberg 's roommate at Harvard when they launched Facebook in 2004. He left Facebook in 2008 and started Asana, whose software helps manage projects.

Between Wednesday and Friday, Moskovitz sold the Class A shares for $19 to $19.73 each, according to the filing with the Securities and Exchange Commission. That's on top of the 450,000 shares he sold earlier this week for $18.79 to $20.08 each, raising nearly $9 million.

He still owns more than 132 million Class A and B shares. He did not sell any stock in Facebook's IPO.

Shares of the California-based company closed Friday down 3 cents at $19.41.