According to the company’s most recent proxy statement, Mark Zuckerberg owns 13% of Facebook. When Facebook went public in 2012, Mark finished the day with a net worth of $20 billion. Over the next few months, his net worth actually dropped to $9 billion as Facebook had a rocky start in the public markets. That was the low point. From July 2013 onward, Facebook’s stock went on an incredible run. His net worth jumped from $13 billion to $30 billion to $40 billion, year over year over year. Mark’s net worth peaked at $79.5 billion on February 1st, 2018. On March 18, the day before the Cambridge Analytica scandal broke, Mark had a net worth of $75.3 billion. The very next day his net worth dropped to $69 billion. The next day it dropped to $65 billion. On March 28, his net worth hit an all-time low of $62.2 billion. Going into today’s testimony, Mark Zuckerberg’s net worth was $64.26 billion. By the time the markets closed (he was still testifying), his net worth had increased by $2.76 billion to $67 billion. FYI, that’s $10 million per minute of testimony, $166,000 per SECOND. A lot of people were predicting a much worse outcome for FB and Zuck. Had this broken a different way, through a blunder or just general market discomfort, it’s not impossible to imagine Facebook stock dropping 10% from Mark’s testimony. All in all, this is the best outcome.