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OpenX

OpenX

Pasadena, California, United States · Founded 2007

501-1000 employees · NASDAQ:OPENX

Sourced & current · updated Oct 12, 20261 of 3 facts verifiedWebsite

OpenX Technologies, Inc. is an independent omnichannel supply-side platform (SSP) supporting programmatic advertising across connected TV, mobile apps, mobile web, and desktop inventory.

Where they sit

Stack tier: Ecosystem Services (A)

Supply Side Platform (SSP)Ad ExchangeProgrammatic Platform

One of the largest independent programmatic ad exchanges and SSPs, competing directly with Magnite and PubMatic for premium publisher inventory

Ownership

Subsidiaries

Competitors

Leadership moves

In their space

Key people

Pre-call brief from ATDb — sourced from the live database, current as of Oct 12, 2026. Not a static screenshot.