Shares has closed a $40 million Series A funding round led by Valar Ventures. The company has been working on a mobile app that lets you easily buy and sell shares, but with a social twist. You can follow your friends’ moves and talk with other users directly from the app. Today, the company is also launching its app on the App Store and Google Play. It is only available to people based in the U.K. for now, but the company expects to expand to other European countries in the future.