AppNexus

{{Short description|Technology company}}

{{Infobox company

| name = AppNexus Inc.

| logo =

| type = Subsidiary

| industry = Online advertising

| foundation = {{start date and age|2007}}

| area_served = Worldwide

| location = New York City, United States

| key_people = Michael Rubenstein (president)

| products = Infrastructure as a service
Ad serving
Analytics

| revenue =

| operating_income =

| net_income =

| num_employees = 1000+

| owner =

| parent = Xandr (2018-present)

| subsid =

| footnotes =

| slogan =

}}

Xandr, formerly known as AppNexus, is an American multinational technology company operating a cloud-based software platform that enables and optimizes programmatic online advertising.{{cite news|url=https://www.nytimes.com/2010/03/12/business/media/12adco.html | title=Instant Ads Set the Pace on the Web| work= The New York Times | date= 2010-03-12| access-date= 2010-03-12 |author=Stephanie Clifford| archive-url= https://web.archive.org/web/20100317165048/http://www.nytimes.com/2010/03/12/business/media/12adco.html| archive-date= 17 March 2010 | url-status= live}} 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|date=August 2020}}

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.{{cite press release |title=AppNexus Officially Launches Ad Platform Fueling the Real-Time Bidding Revolution in Display Advertising |url=http://www.prnewswire.com/news-releases/appnexus-officially-launches-ad-platform-fueling-the-real-time-bidding-revolution-in-display-advertising-87460287.html |work= Press release| author= AppNexus| publisher=PR Newswire |date=2010-03-12 |access-date=2010-03-12| archive-url= https://web.archive.org/web/20100322191221/http://www.prnewswire.com/news-releases/appnexus-officially-launches-ad-platform-fueling-the-real-time-bidding-revolution-in-display-advertising-87460287.html| archive-date= 22 March 2010 | url-status= live}}{{Cite web|url=http://www.mediapost.com/publications/article/271701/appnexus-expands-video-buying-adds-new-video-dema.html|title=AppNexus Expands Video Buying, Adds New Video Demand Partners|website=www.mediapost.com|access-date=2016-05-22}} It operates out of multiple data centers, including one in Amsterdam serving Europe and the Middle East, in a facility shared with Equinix.

In June 2018, AT&T announced it was acquiring the company and putting it under its Xandr division as a subsidiary.{{cite web |title=AT&T to Acquire AppNexus |url=https://www.businesswire.com/news/home/20180625005372/en/ATT-Acquire-AppNexus |website=www.businesswire.com |access-date=23 December 2019 |language=en |date=25 June 2018}} AppNexus was reportedly sold for $1.6 billion, while most news outlets speculated the company did not sell for less than $2 billion.{{Cite news|url=https://adexchanger.com/tv-2/att-will-acquire-appnexus/|title=AT&T Will Acquire AppNexus {{!}} AdExchanger|date=2018-06-25|work=AdExchanger|access-date=2018-07-13|language=en-US}}

In October 2019, Xandr purchased Clypd, a privately-held technology company focused on enabling programmatic buying of linear television advertising.{{cite web|url=https://adage.com/article/digital/xandr-acquires-clypd-move-build-connected-tv-empire/2208371|title=Xandr Acquired Clypt in Move to Build Connevted TV Empire|date=18 October 2019 }}.

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.{{cite web|title=Microsoft to buy Xandr ad marketplace from AT&T|url=https://www.zdnet.com/article/microsoft-to-buy-xandr-ad-marketplace-from-at-t/|work=ZDNet|first=Mary Jo|last=Foley|date=December 21, 2021|access-date=December 21, 2021}}