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Disclaimer: Star Stack provides information about European technology services for educational purposes only. Service listings, sovereignty assessments, and recommendations do not constitute legal, financial, or professional advice. We encourage you to verify all information independently and consult appropriate professionals before making technology decisions. Star Stack is not affiliated with any listed services unless explicitly stated.

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AppNexus | Star Stack

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AppNexus

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AppNexus

Name: AppNexus
Author: Star Stack

Microsoft Advertising programmatic platform for search, display, and video

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About

Microsoft Advertising is a programmatic platform that manages search, display, video, and retail ad campaigns across Microsoft properties and partner networks. It serves advertisers and publishers by leveraging Bing, Edge, and exclusive partnerships like Yahoo and DuckDuckGo for inventory monetization and audience reach.

Resources

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Sovereignty Score

Recorded assessment version: jurisdiction-ownership-2026-10-04

out of 100

Data completeness64% (Partial)

Jurisdictional(56%)

Significant foreign legal exposure risk

Jurisdiction: United States (EU adequacy decision)
Parent provider in United States (CLOUD Act risk) (Microsoft Corporation)
Five Eyes intelligence alliance exposure
US CLOUD Act applies (US can compel data access regardless of storage location)

Ownership(44%)

Significant foreign ownership or control risk

Mixed ownership (<30% non-EU)
Acquired by another company
Acquisition risk unknown (assumed high) (Submit verified data to improve this score)

More dimensions coming soon

GovernanceComing soon

PortabilityComing soon

LicenseComing soon

CommunityComing soon

How missing data affects scores Submit data corrections

Provider

AppNexus Inc.

Quick Facts

Legal jurisdiction: United States
Headquarters: United States
Ownership: Mixed (<30% Non-EU)
Deployment: SaaS

Evidence and freshness

Verification date unknown. This assessment needs review.

A score is an assessment of recorded facts. Missing evidence and unresolved ownership can affect the result.

hqCountry: other
Retrieved 30/01/2026, confidence 95%.
Read evidence excerpt
AppNexus is headquartered in the Flatiron District of New York City at 28 West 23rd Street
hqCountry: other
Retrieved 30/01/2026, confidence 95%.
Read evidence excerpt
AppNexus is headquartered in the Flatiron District of New York City at 28 West 23rd Street
Ownership: other
Statement 12/02/2026, confidence 90%.
Read evidence notes
From enrichment pipeline 2026-02-06_03-32-59_c6_v20-validation