Already hot for years, antibody-drug conjugates (ADCs) continued to hold charm for the industry, sparking a number of sizable deals starting early in 2024, when Johnson & Johnson (J&J) put $2 billion on the table to take over Ambrx Biopharma Inc.

Investors might not have been overly excited, but Genmab A/S executives enthused about the “complementarity” of its proposed acquisition of antibody-drug conjugate (ADC) specialist Profoundbio Inc. for $1.8 billion in cash. The deal, expected to close in the first half of 2024, marks the biggest by far for the Copenhagen, Denmark-based biopharma and the latest transaction for the red hot ADC space.