A federal judge in California has temporarily stopped Paramount Skydance and Warner Bros. Discovery from closing their $111 billion merger or combining operations, giving 12 states an early court win in their antitrust challenge.
US District Judge Araceli Martínez-Olguín issued the temporary restraining order in the US District Court for the Northern District of California. The order lasts 14 days, though it can be extended or replaced with a preliminary injunction that would keep the deal on ice while the lawsuit proceeds.
That timing matters. A temporary restraining order is not a final ruling on whether the merger violates antitrust law. It is a fast, emergency brake. To get one, the states had to show they are likely to succeed, that harm is likely without court action, and that an injunction would serve the public interest. Martínez-Olguín found the states cleared that early bar.
California Attorney General Rob Bonta, whose office is leading the state coalition, said the order blocks what he called the unlawful merger of Warner Bros. and Paramount. Bonta said the decision was a first step toward preventing the deal from being completed.
The court focused on theatrical film competition
The states argue that the merger would reduce competition by joining two of the five major Hollywood movie studios and two of the five major owners of basic cable television channels. The Trump administration had already approved the transaction, according to the case record described by the states, but that did not stop the state-level challenge.
Martínez-Olguín’s order focused heavily on the theatrical-film market. She wrote that the states made a strong showing that the transaction would substantially reduce competition in wide-release theatrical distribution, and that the court could presume the merger was likely unlawful under antitrust law.
The merged company would control an estimated 27 percent of the wide-release theatrical distribution market, according to the order. Courts have treated mergers producing a 30 percent market share as presumptively suspect, but Martínez-Olguín wrote that 30 percent is not a magic floor below which antitrust problems disappear.
The judge also cited the Herfindahl-Hirschman Index, the concentration metric antitrust lawyers use when they want arithmetic to do some of the yelling. According to the order, the increase in concentration from combining Paramount and Warner Bros. Discovery exceeds the level needed to indicate a likely boost in market power.
Martínez-Olguín wrote that once plaintiffs show a presumption of illegality through excessive market concentration, they do not need detailed proof of market behavior or predicted competitive effects to obtain emergency relief.
Paramount and Warner must wait
The companies argued against being blocked, but the judge found no immediate harm from delay. The order says Paramount Skydance and Warner Bros. Discovery conceded they would not start incurring carrying costs tied to a delayed merger until the end of September 2026.
Even if the companies claimed economic harm from waiting, Martínez-Olguín wrote, that concern did not outweigh the public harms the states identified, including lost competition if the deal closed before the court could review it.
The judge set a briefing schedule and scheduled an August 3 hearing on whether to issue a preliminary injunction. If she grants that longer-lasting order, the merger would remain blocked until the case is resolved, unless a higher court intervenes.
Paramount can ask the US Court of Appeals for the 9th Circuit to review the district court’s rulings. The fight now shifts from emergency paperwork to the harder question the studios would rather not have tested in open court: whether combining two major entertainment companies leaves viewers, theaters, and cable buyers with fewer real choices.
This story draws on original reporting from Ars Technica.
