Yahoo!

Jerry Yang and David Filo, Electrical Engineering graduate students at Stanford University, founded a website named 'Jerry and David's Guide to the World Wide Web', which was later renamed 'Yahoo!'. The word 'YAHOO' is a backronym for 'Yet Another Hierarchically Organized Oracle' or 'Yet Another Hierarchical Officious Oracle'.

Yahoo! acquires Four11 for approximately $94 million in stock, expanding its portfolio and influence in the tech industry.

Yahoo! acquires Viaweb for $49 million and rebrands it as Yahoo! Store, strengthening its e-commerce capabilities.

Yahoo! acquires Geocities for $4.58 billion in stock.

Yahoo! acquires Broadcast.com for $5.7 billion in shares.

Yahoo stocks close at an all-time high of $475.00 (pre-split price) a share, making them the most valuable company in the world at the time.

At the height of the Dot-com tech bubble, shares in Yahoo Japan became the first stocks in Japanese history to trade at over ¥100,000,000, reaching a price of 101.4 million yen ($962,140 at that time).

In the case of LICRA v. Yahoo!, a French judge ordered Yahoo to ban Nazi-related sites from its search engine and to stop acting as an intermediary on bids for objects with racist overtones. Yahoo initially denied the French court's jurisdiction but eventually quit voluntarily trading on Nazi and Ku Klux Klan bibelots.

On September 26, 2001, Yahoo! stock closed at an all-time low of $8.11.

On December 27, 2001, Yahoo bid $436 million for the job search engine HotJobs, successfully defeating rival TMP Worldwide (Monster.com).

On February 15, 2005, Yahoo! established its European headquarters in Dublin, Ireland, creating 400 new jobs.

On March 2, 2005, Yahoo completed ten years of corporate existence and gave away free ice cream coupons at U.S. Baskin-Robbins stores to its users.

On March 20, 2005, Yahoo! acquired the photo sharing service Flickr and its creator Ludicorp.

Yahoo acquires 40 percent of Alibaba.com for $1 billion, and Alibaba takes over the operation of Yahoo China.

Yahoo supplies information to the People's Republic of China leading to the imprisonment of reporter Shi Tao for ten years. Yahoo states that it was following Chinese law.

Yahoo! acquired del.icio.us on December 9, 2005.

Yahoo! announces a major re-organization, involving the departure of key executives and the promotion of Sue Decker to the position of CFO. The re-organization also includes shifts in various business units.

Yahoo launches its new search advertising system, Panama, aiming to enhance its advertising capabilities and compete more effectively in the online advertising market.

Yahoo! announces the acquisition of Right Media, a leading online advertising exchange platform, to strengthen its position in the digital advertising market.

Yahoo! co-founder Jerry Yang replaces Terry Semel as CEO, marking a significant leadership change at the company.

On November 17, 2008, Yahoo! co-founder and CEO Yang stepped down from his position, just 18 months after assuming the role. This leadership change marked a significant transition for the company.

On September 6, 2011, CEO Bartz was fired from her position at Yahoo!, marking a significant leadership change within the company.

Marissa Mayer is appointed as the CEO of Yahoo!, bringing her extensive experience from Google to lead the company.

Yahoo! announces the completion of the initial phase of the Alibaba share repurchase, a significant financial move expected to bring substantial returns to the company.

Yahoo! announced changes to its product offerings, including shutting down some and updating others. The Yahoo! Message Boards site was closed on April 1, and the Yahoo! updates API were no longer supported after April 16.

Yahoo! acquired Summly on March 25, 2013.

Fred Amoroso announced his immediate resignation as Yahoo chairman on April 26, 2013, and would be leaving the board in June 2013.

Yahoo announced a partnership with Twitter to include relevant tweets in their homepage news feed on May 16, 2013.

The Wall Street Journal reported that Yahoo!'s board approved an all-cash deal to purchase the blogging website Tumblr for $1.1 billion on May 19, 2013. David Karp, the company's CEO and founder, will remain a large shareholder.

The revamp of Yahoo-owned photography service Flickr was launched in Times Square, New York, U.S. The event was attended by the city's mayor and a large contingency of journalists. Yahoo announced the new tagline 'biggr, spectaculr, wherevr' and provided Flickr users with a free terabyte of storage. The official announcement of the Tumblr acquisition was also included in the event.

On January 3, 2014, a malicious exploit was detected in Yahoo!'s ad network by Fox-IT, affecting a significant number of users in Romania, France, and the UK. The malware targeted Java and raised serious security issues for Yahoo! users.

On February 11, 2014, Yahoo! acquired Wander, integrating its team into Yahoo's mobile and emerging products unit in New York City, signifying Yahoo!'s strategic expansion in the mobile technology sector.

Verizon agrees to purchase Yahoo's operating business for $4.8 billion.

On September 22, 2016, Yahoo disclosed a data breach in which hackers stole information associated with at least 500 million user accounts in late 2014, marking one of the largest technical breaches reported to date.

On December 14, 2016, a separate data breach occurring around August 2013 was reported, affecting over 1 billion user accounts and considered the largest discovered in the history of the Internet.

On January 9, 2017, Marissa Mayer announced she would step down from Yahoo's board of directors if its sale to Verizon, of $4.5 billion, went through, and that Yahoo! would rename itself to Altaba upon the deal's closure.

Verizon officially acquires Yahoo!, consolidating its assets in the subsidiary company Oath and ending Yahoo!'s existence as an independent corporate entity. CEO Mayer resigns from the company via her Tumblr account.

Yahoo announces the impending closure of Yahoo Answers, a significant decision after 16 years of operation.

Apollo Global Management enters an agreement with Verizon to acquire Verizon Media, including Yahoo! and AOL Brands, for $5 billion, leading to the formation of a new company known as Yahoo.

Yahoo Answers ceases its services after 16 years of active operation, marking the end of an era for the platform.

Apollo Global Management completes the acquisition of Yahoo, formerly known as Verizon Media.