Facebook went public in 2012 in the biggest social media IPO ever. The 2012 business quiz: 20 questions to test your knowledge Add to ... The Globe and Mail Published Tuesday, Dec. 25 2012, 5:00 PM EST Last updated Tuesday, Dec. 25 2012, 5:40 PM EST What do you remember about the world's largest social media IPO and the blockbuster proxy fight at Canadian Pacific? 0 comments Print AA