List of mergers and acquisitions by Microsoft in the context of "Xbox 360"

Microsoft Corporation is an American multinational technology conglomerate headquartered in Redmond, Washington. Founded in 1975, the company became influential in the rise of personal computers through software like Windows, and has since expanded to Internet services, cloud computing, artificial intelligence, video gaming, and other fields. Often described as a Big Tech company, Microsoft is the largest software company by revenue, one of the most valuable public companies, and one of the most valuable brands globally.

Microsoft was founded by Bill Gates and Paul Allen to market BASIC interpreters for the Altair 8800. It rose to dominate the personal computer operating system market with MS-DOS in the mid-1980s, followed by Windows. During the 41 years from 1980 to 2021 Microsoft released 9 versions of MS-DOS with a median frequency of 2 years, and 13 versions of Windows with a median frequency of 3 years. The company's 1986 initial public offering (IPO) and subsequent rise in its share price created three billionaires and an estimated 12,000 millionaires among Microsoft employees. Since the 1990s, it has increasingly diversified from the operating system market. Steve Ballmer replaced Gates as CEO in 2000. He oversaw the then-largest of Microsoft's corporate acquisitions in Skype Technologies in 2011, an increased focus on hardware that led to its first in-house PC line, the Surface, in 2012, and the formation of Microsoft Mobile through Nokia. Since Satya Nadella took over as CEO in 2014, the company has changed focus towards cloud computing, as well as its acquisition of LinkedIn for $26.2 billion in 2016. Under Nadella's direction, the company has expanded its video gaming business to support the Xbox brand, establishing the Microsoft Gaming division in 2022 and the acquisition of Activision Blizzard for $68.7 billion in 2023.

Microsoft Mobile Oy was a Finnish subsidiary of Microsoft Devices involved in the development and manufacturing of mobile phones. Based in Keilaniemi, Espoo, it was established in 2014 following the acquisition of Nokia's Devices and Services division by Microsoft in a deal valued at €5.4 billion, which was completed in April 2014. Nokia's then-CEO, Stephen Elop, joined Microsoft as president of its Devices division following the acquisition, and the acquisition was part of Steve Ballmer's strategy to turn Microsoft into a "devices and services" company. Under a 10-year licensing agreement, Microsoft Mobile held rights to sell feature phones running the S30/S30+ platform under the Nokia brand.

Originally Microsoft had established a major partnership with Nokia in 2011, in which the company exclusively produced smartphones using the Windows Phone platform, and promoted Microsoft services on its feature phone products (including Bing search). Microsoft also licensed Here Technologies data for its own mapping services. While Nokia's resultant Lumia range had the largest market share out of all Windows Phone vendors, Nokia's overall market share was falling rapidly due to competition from other major vendors, resulting in a dire financial situation. In September 2013, Microsoft announced its acquisition of Nokia's devices and services businesses, which closed with the formation of a Finnish subsidiary, Microsoft Mobile. On smartphones, the Nokia name was phased out in favour of Microsoft branding on future Lumia products.