ADC vs. Bispecific Antibody Deal Terms Comparison
Market Analysis
ADCs and bispecific antibodies represent the two most actively transacted advanced modalities in oncology licensing. At Phase 2, ADC deals carry a median total deal value of $2.5B versus $2.2B for bispecific antibodies. ADC upfront payments average $393M compared to $348M for bispecifics, reflecting differences in manufacturing complexity, platform maturity, and competitive dynamics.
The milestone structures diverge based on modality-specific risk profiles. ADC development milestones average $526M versus $466M for bispecifics. ADC deals emphasize payload-linker optimization and therapeutic index milestones, while bispecific deals focus on mechanism-of-action validation and T-cell engagement safety data. Commercial milestones are comparable: $736M for ADCs versus $652M for bispecifics.
Royalty rate structures differ modestly between the two modalities. ADC base royalties range from 13.4% to 21.9%, while bispecific base royalties range from 12.9% to 21.1%. The bispecific-ADC hybrid modality (bispecific antibody-drug conjugates) is emerging as a new premium category that commands terms exceeding either standalone modality.
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