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A corporate data showdown is heating up in Delaware Chancery Court, where Nielsen Holdings Ltd. scored an early legal win in its ongoing battle over data access rights with Nielsen Consumer Inc. (NIQ)—a spinoff it launched in 2021. The lawsuit, tied to Nielsen’s intended sale of a business unit to rival Circana LLC, took a sharp turn Friday as the court granted a partial temporary restraining order (TRO) and set an expedited trial for July 22.

At the heart of the Nielsen Holdings Circana suit is a bitter feud over who gets access to mission-critical consumer data. Nielsen claims NIQ tried to choke off its and Circana's access in a bid to undermine a pending transaction—and strengthen NIQ’s position as Circana’s direct rival.

Data Block Sparks Emergency Relief Request

Vice Chancellor Nathan A. Cook, while cautious not to expose sealed details, said the record supports a TRO—at least for now—to preserve Nielsen’s access to the disputed data.

“My sense is that NIQ does not really dispute entry of a TRO with respect to data access for Nielsen,” Judge Cook said, adding, “The expectation is that Nielsen's access will continue through any closing of the transaction.”

The situation surrounding Circana’s access, however, remains unresolved. The court will address that question at trial, as Cook suggested granting access to Circana may not align with preserving the “status quo” typically protected under a TRO.

Rivals, Deals, and Litigation Collide

Nielsen, the global authority in audience measurement and marketing analytics, is trying to offload its marketing mix modeling (MMM) business—a tool that measures the effectiveness of marketing efforts—to Circana, a prominent consumer intelligence firm.

NIQ, the Nielsen spin-off that now operates as a fierce competitor to Circana, allegedly cut off both Nielsen and Circana from shared consumer data, violating a 2021 master services agreement, according to Nielsen’s attorneys.

“We are seeking a TRO that fully maintains the status quo,” said Colin B. Davis of Gibson Dunn & Crutcher LLP, requesting the court to block NIQ from revoking access even if the Circana sale is finalized.

But NIQ pushed back. Its attorney, Ryan D. Stottmann of Morris Nichols Arsht & Tunnell LLP, argued that the requested relief was improper.

“This would change the status quo to implement a disputed contract term that will be sorted out in the case,” he said.

A Separate Suit Still Simmering

The drama doesn’t end there. Nielsen Holdings filed a separate lawsuit on June 10 to compel Circana to close the MMM business deal—but that filing, along with Circana’s reply, remains sealed.

As the court now awaits a draft TRO order to be finalized by both parties, the broader fight over consumer data and industry control presses forward.