Short answers, pulled from the story.
Jerry Yang and David Filo created the website that became Yahoo in January 1994 while they were electrical engineering graduate students at Stanford University. The pair officially incorporated the company on the 2nd of March 1995 after registering the domain name yahoo.com on the 18th of January 1995.
Yahoo reached an all-time high share price of $118.75 on the 3rd of January 2000 before crashing to a post-bubble low of $8.11 by the 26th of September 2001. The company went public via an initial offering in April 1996 with stock prices rising 600% within two years of that event.
Yahoo Holdings provided Chinese authorities with IP address data registered to a Hunan newspaper which enabled police to locate and arrest journalist Shi Tao in 2005. Another case involved engineer Wang Xiaoning arrested in September 2002 after Yahoo assisted authorities by providing information about his electronic journals calling for democratic reform.
Hackers gained access to over five hundred million Yahoo user accounts using manufactured web cookies to falsify login credentials without needing passwords around late 2014. A separate breach occurring around August 2013 affected more than one billion accounts and was reported publicly in December 2016. On the 3rd of October 2017, Yahoo stated that all three billion of its user accounts were compromised by these combined thefts.
Verizon Communications announced the acquisition of Yahoo's core Internet business for $4.83 billion on the 25th of July 2016 though major data breaches delayed the final deal completion until the 13th of June 2017. Marissa Mayer resigned following the transaction while Yahoo merged with AOL and HuffPost under a new entity called Oath Inc.