Here's everything you need to know about Snap's huge IPO

This is a special Snap Inc.-themed edition of Finance Insider, Business Insider's summary of the top stories of the past 24 hours.
Snapchat's parent company Snap Inc. on Thursday set in motion what could be the biggest tech flotation in years. Here's what you need to know:
Snap files for its IPO, revealing surging sales growth and huge losses
Here's who is going to get rich from the Snap IPO
Snap is asking investors to put a $25 billion valuation on two people
Snap lost $514 million last ye