AppNexus

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AppNexus Inc.
Company typeSubsidiary
IndustryOnline advertising
Founded2007; 19 years ago (2007)
HeadquartersNew York City, United States
Area served
Worldwide
Key people
Michael Rubenstein (president)
ProductsInfrastructure as a service
Ad serving
Analytics
Number of employees
1000+
ParentXandr (2018-present)

Xandr, formerly known as AppNexus, is an American multinational technology company operating a cloud-based software platform that enables and optimizes programmatic online advertising.[1] Headquartered in the Flatiron District of New York City, the company has 23 offices in North America, Latin America, Europe, Asia and Australia.[citation needed]

AppNexus offers online auction infrastructure and technology for data management, optimization, financial clearing and support for directly negotiated advertising campaigns. It has both demand-side platform (DSP), supply-side platform (SSP), and ad serving functionalities. It integrates with advertising sources including Google's "Authorized Buyers" ad exchange, Magnite, Pubmatic and other aggregators.[2][3] It operates out of multiple data centers, including one in Amsterdam serving Europe and the Middle East, in a facility shared with Equinix.[4]

In June 2018, AT&T announced it was acquiring the company and putting it under its Xandr division as a subsidiary.[5] AppNexus was reportedly sold for $1.6 billion, while most news outlets speculated the company did not sell for less than $2 billion.[6]

In October 2019, Xandr purchased Clypd, a privately held technology company focused on enabling programmatic buying of linear television advertising.[7]

In December 2021, AT&T announced that they had agreed to sell Xandr to Microsoft for an undisclosed price, subject to customary closing conditions, including regulatory reviews.[8]

Founders and financing

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AppNexus was founded by former Right Media staff, CTO Brian O'Kelley, and Mike Nolet, product manager and director of analytics,[9] with Michael Rubenstein, a former vice president and general manager at Google DoubleClick, who joined AppNexus as president in September 2009.[10] The company was financially backed by Microsoft, Khosla Ventures, First Round Capital, Venrock,[11] Kodiak Venture Partners, Marc Andreessen, Ben Horowitz, and Ron Conway; as of 2015 the company had raised $250 million in financing. O'Kelley stepped down as CEO in October 2018.[12]

References

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  10. ^ [1] Archived December 12, 2010, at the Wayback Machine
  11. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  12. ^ Brian O’Kelley Steps Down As AppNexus CEO Published by adexchanger.com on October 5, 2018, retrieved on September 11, 2019
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