What happened in the Anthropic–Pentagon legal fight?

In early March 2026 the Pentagon designated Anthropic a supply chain risk, a move that has been criticized by many technology firms. The label was made after officials said they needed to protect military systems, although the formal letter gave little public detail. While the designation limits Anthropic’s role in defense contracts, it has not stopped the company from serving other customers.

Anthropic has filed suit in the U.S. District Court for the Northern District of California and has argued that the action exceeds the government’s authority and amounts to retaliation for the company’s speech. The company has also said it could lose hundreds of millions to billions of dollars in 2026 if the designation is enforced. Judge Rita F. Lin held an expedited hearing on March 24, 2026, and parties submitted declarations and briefs.

The court has taken the motion under submission and has not yet issued a ruling. Several technology companies and retired military leaders have sought to support Anthropic through filings, and legal analysts have said the statute the Pentagon cited, 10 U.S.C. § 3252, raises novel questions about procurement power and judicial review.