Appeals court upholds Cumulus injunction against Nielsen
A federal appeals court upheld a preliminary injunction Cumulus Media obtained against Nielsen, finding Nielsen likely violated antitrust law by using alleged control of national radio data to pressure broadcasters to buy unwanted local data. The July 13 ruling reinstates a Dec. 30 injunction, barring Nielsen from enforcing its Network Policy and from charging commercially unreasonable standalone Nationwide rates, with a 2026 “safe harbor” rate.
How this was made

The 30-second read
Why it matters
The decision reinstates restrictions on Nielsen’s Network Policy enforcement and standalone Nationwide access pricing, framed as likely antitrust violations tied to alleged monopoly control of national radio data.
Market read
A court ruling reinstating an injunction is a concrete legal catalyst that can shift near-term expectations for bargaining power and pricing in radio data access.
What to watch
The safe harbor rate provision tied to highest 2026 rates could limit how much commercial pricing flexibility Nielsen loses in practice.
Background
Cumulus Media obtained a preliminary injunction in SDNY, and the appeals court upheld it on July 13, reinstating the Dec. 30 order.
Ticker impact
Cumulus Media won and the appeals court upheld an injunction against Nielsen over alleged antitrust misuse of national radio data.
Near-term sentiment support for CMLS as the ruling reinstates the Dec. 30 preliminary injunction.
The article is specific that the appeals court reinstated the injunction barring enforcement of Nielsen’s Network Policy and standalone Nationwide rates deemed commercially unreasonable.
Market effects
Highlights antitrust scrutiny in media measurement and data licensing, potentially affecting pricing leverage across radio data products.
Primarily US-focused radio advertising and measurement market impacts.
Limited direct global impact, but reinforces broader antitrust enforcement risk for data monopolization claims.
Counterpoint
Even with an injunction, the ultimate merits and damages remain unresolved, so equity impact may fade if appeals continue or settlement occurs.
Key entities
- companyCumulus Media
Plaintiff that won an injunction against Nielsen; the appeals court upheld it on July 13.
- companyNielsen
Defendant whose Network Policy enforcement and standalone Nationwide access rates were enjoined.


