BusinessThe 3 Biggest Individual Twitter ShareholdersTwitter's S-1 Filing disclosed the company's biggest shareholders. They didn't disclose a pricing range, so we don't quite know how much it's worth...yet.By by Matthew ZeitlinBuzzFeed News ReporterPosted on October 3, 2013, 9:26 pmTwitterFacebookLink 1. Evan Williams, co-founder: 12%, 56.9 million shares 2. Jack Dorsey, co-founder and executive chairman: 4.9%, 23 million shares 3. Dick Costolo, Twitter CEO: 1.6%, 7.6 million shares