The visual search engine will go public on the NYSE under the ticker symbol "PINS. ": Pinterest, the nearly decade-old visual search engine, has unveiled its S-1 as it prepares for an initial public offering expected in April. Valued at $12.3 billion in 2017, Pinterest took its first official step toward a 2019 IPO two months ago, hiring Goldman Sachs and JPMorgan Chase as lead underwriters for its NYSE offering. Now it’s giving us a closer look at its financials.