The price valued the digital pin board company, which lets people save images and links from around the web, at $12.7 billion. That is a little above its last private fund-raising round, which had pegged the company at $12 billion.By selling at $19 a share, Pinterest raised $1.6 billion from big investors

In its I.P.O. prospectus, Pinterest emphasized its differences from some of those services. Pinterest is not a social media app for hanging out with celebrities or broadcasting one’s life, the company said. It is meant to be personal. The company’s 250 million monthly active users, called “pinners,” come to the site to plan their lives, including home projects, weddings and meals.