Facebook joined the ranks as a company valued at over a trillion dollars today's market close. According to Yahoo Finance, the company's market capital is $1.008 trillion. This marks the company surpassing the mark for the very first time in its history.The Facebook site, Messenger, Instagram, WhatsApp and Oculus are some of the most prominent divisions of Facebook. Facebook is the only US tech company that has passed $1 trillion in valuation. This makes it the oldest if you count from the date Google was founded (which was in 1998) and not Alphabet (which came out in 2015).This news is in addition to the dismissal by the FTC of its case to unwind Facebooks Instagram acquisitions and WhatsApp acquisitions. A federal judge ruled that the FTC failed provide sufficient evidence that the company is not a monopoly.