FTC issues second request on Curium's planned takeover of Lantheus

The Federal Trade Commission has asked for more information on Curium's planned acquisition of Lantheus Holdings, extending the antitrust review of the deal.

Lantheus and Curium US Holdings each received a request for additional information and documentary materials, known as a second request, from the FTC on Oct. 21, according to an 8-K Lantheus filed Thursday.

A second request extends the waiting period under the Hart-Scott-Rodino Act until 30 days after both companies have substantially complied, unless the FTC ends it sooner, the filing said.

Timeline intact

The companies "expect to promptly respond to the Second Requests and to continue to work cooperatively with the FTC in its review," Lantheus said. They continue to expect the merger to close in the first half of 2027.

Lantheus agreed on Aug. 3, 2026, to merge with a subsidiary of Curium, with Lantheus surviving as a wholly owned subsidiary of Curium's U.S. parent, according to the filing. Completion still requires the end of the HSR waiting period and the satisfaction or waiver of other closing conditions in the merger agreement.

By the numbers

• Second requests received: Oct. 21, 2026
• Merger agreement signed: Aug. 3, 2026
• Waiting period: extends to 30 days after substantial compliance
• Expected closing: first half of 2027

Sources

1. Lantheus Holdings, Inc., Form 8-K (Item 8.01) filed Oct. 22, 2026, accession 0001193125-26-428324

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