Signing Off

Randi Zuckerberg Leaving Facebook

After six years, Randi Zuckerberg is leaving Facebook, the company her brother Mark founded, to start a new firm helping companies with social-media strategy. Zuckerberg was marketing director of Facebook, although had been on maternity leave for the last three months. Her new company. RtoZ media, will be “focused on the exciting trends underway in the media industry,” she said in her resignation letter.