what's with the dog?In 2008, Spark led Twitter’s Series B and made a very dear friend in the process, Twitter’s Co-Founder, Biz Stone. Over the years, we remained very close. And in 2017, after selling Jelly to Pinterest, Biz decided to think about his next move while working out of Spark’s San Francisco office. At the same time, Spark was also thinking about its next move, but as a brand. Biz