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Movements, leaders, victories and the continuing fight for equality.
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Meet the people whose lives, choices and achievements shaped the journey.
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Moments that changed communities, movements, institutions and the nation.
Wilmington, North Carolina once had a thriving Black middle class and an elected interracial government. In 1898 white supremacists used violence to overthrow that government, kill Black residents and drive many others from the city.
MORE →Reflects the personal views, recollections, and perspective of the author, Mike Davis.
This is a personal recollection on the Move fire on May 13, 1985
| Type | Subsidiary |
|---|---|
| Industry | Online advertising |
| Founded | 2007 |
| Headquarters | New York City, United States |
Area served | Worldwide |
| Key people | Michael Rubenstein (president) |
| Products | Infrastructure as a service Ad serving Analytics |
Number of employees | 1000+ |
| Parent | Xandr (2018-present) |
AppNexus is an American multinational technology company operating a cloud-based software platform that enables and optimizes programmatic online advertising.[1]
AppNexus was founded in 2007 by former Right Media staff, CTO Brian O'Kelley, and Mike Nolet, product manager and director of analytics.[2] Michael Rubenstein, a former vice president and general manager at Google DoubleClick, who joined AppNexus as president in September 2009.[3] The company was financially backed by Microsoft, Khosla Ventures, First Round Capital, Venrock,[4] 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.[5]
AppNexus is headquartered in the Flatiron District of New York City. The company operates out of 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.[6][7] It operates out of multiple data centers, including one in Amsterdam serving Europe and the Middle East, in a facility shared with Equinix.[8]
In June 2018, AT&T announced it was acquiring the company and putting it under its Xandr division as a subsidiary.[9][10] AppNexus was reportedly sold for $1.6 billion, while most news outlets speculated the company did not sell for less than $2 billion.[11]
In October 2019, Xandr purchased Clypd, a privately held technology company focused on enabling programmatic buying of linear television advertising.[12]
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.[13]
Source: Wikipedia. Article content is retrieved live through the MediaWiki API.
AppNexus is an American multinational technology company operating a cloud-based software platform that enables and optimizes programmatic online advertising.
Xandr, Inc. (pronounced "Zander") was the advertising and analytics subsidiary of Microsoft, which operates an online platform, Community, for buying and selling consumer-centric digital advertising. In December 2021, AT&T sold Xandr (including AppNexus and Clypd) to Microsoft for an undisclosed price. The acquisition was completed in June 2022. In 2023, Microsoft retired the Xandr name and consolidated the business under its Microsoft Advertising brand. In 2025, Microsoft announced that it would shut down its buy-side Invest product in early 2026.
Brian O'Kelley (born 1977) is an American technology entrepreneur who co-founded the advertising-technology company AppNexus and the emissions-measurement company Scope3. He was chief executive of AppNexus and is chief executive of Scope3.
Midtown Manhattan is the central portion of the New York City borough of Manhattan, which serves as the city's primary central business district. Midtown is home to some of the city's most prominent buildings, including the Empire State Building, the Chrysler Building, the Hudson Yards Redevelopment Project, the headquarters of the United Nations, Grand Central Terminal, and Rockefeller Center, as well as several prominent tourist destinations, including Broadway, Times Square, and Koreatown. Penn Station in Midtown Manhattan is the busiest transportation hub in the Western Hemisphere. Midtown Manhattan is the largest central business district in the world and ranks among the world's most expensive locations for real estate; Fifth Avenue in Midtown Manhattan has commanded the world's highest retail rents and had been ranked as the most expensive shopping street in the world before falling to second in 2024. Midtown Manhattan is the country's largest commercial, entertainment, and media center, and is also a growing financial and fintech center. Many of New York City's skyscrapers, including its tallest hotels and apartment towers, are located in Midtown Manhattan. The neighborhood hosts commuters and residents working in its offices, hotels, and retail establishments, as well as tourists and students. Times Square, the brightly illuminated hub of the Broadway Theater District, is a major center of the world's entertainment industry. Sixth Avenue also has the headquarters of three of the four major U.S. television networks. Midtown is part of Manhattan Community District 5. It is patrolled by the 14th and 18th precincts of the New York City Police Department.
Before the 1921 destruction of Tulsa’s Greenwood District, Black residents had created a remarkable center of business and community life. The district included stores, professional offices, entertainment venues and homes owned by Black citizens. Understanding Greenwood means learning what was built—not only what was burned.
MORE →Joe Louis.
