3. YouTube
3. YouTube
Price: $1.65 billion
Announced: October 2006
FTC Approval: November 2006

The video giant wed the search giant in late 2006 to mostly positive feedback. Analysts noted the move, though expensive, gave Google "a leader in two of the big three, email, search, and video," as Goldman Sachs wrote in a report from the time of the announcement. The biggest concern experts had at the time of the sale? How Google would address copyright concerns with the user-driven video site. Google has managed to deal with such copyright issues successfully, while keeping YouTube relevant and looking forward. Corollary purchases such as On2 will allow Google to continue to innovate -- and make more money -- from the site.

Last updated August 16 2011: 12:14 PM ET
Join the Conversation

The $12.5 billion acquisition is guaranteed to send shockwaves through the mobile sector. Truth is, both companies need each other badly.

Most stock quote data provided by BATS. Market indices are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer.

Morningstar: © 2014 Morningstar, Inc. All Rights Reserved.

Factset: FactSet Research Systems Inc. 2014. All rights reserved.

Chicago Mercantile Association: Certain market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved.

Dow Jones: The Dow Jones branded indices are proprietary to and are calculated, distributed and marketed by DJI Opco, a subsidiary of S&P Dow Jones Indices LLC and have been licensed for use to S&P Opco, LLC and CNN. Standard & Poor's and S&P are registered trademarks of Standard & Poor’s Financial Services LLC and Dow Jones is a registered trademark of Dow Jones Trademark Holdings LLC. All content of the Dow Jones branded indices © S&P Dow Jones Indices LLC 2014 and/or its affiliates.