Lantheus and Curium get FTC second request on merger review

The request extends the regulatory waiting period until 30 days after both companies comply, unless the FTC closes its review sooner

Lantheus Holdings said it and Curium US Holdings each received a second request from the Federal Trade Commission on October 21, 2026, as part of the agency's review of Curium's pending acquisition of Lantheus.

The request extends the waiting period under the Hart-Scott-Rodino Act until 30 days after both companies substantially comply with it, unless the FTC ends its review before then. Lantheus and Curium said they still expect the deal to close in the first half of 2027.

A second request is a standard step in merger review and does not by itself signal that the FTC has competitive objections to a deal. Other deals this cycle, including Cintas's acquisition of UniFirst, have also drawn second requests and gone on to clear review on a timing basis rather than being blocked.

With Lantheus and Curium still pointing to a first-half 2027 close, the extended clock pushes the likely closing date later within that window rather than putting the deal itself at risk. For shareholders, the practical effect is a longer stretch of holding regulatory and timing risk, without any new indication of whether the FTC has substantive concerns about the merger.