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FcRn Antagonist vs Complement Inhibitor — Immunology Deal Terms Comparison

FcRn Antagonist Median Upfront
$583M
Total: $3.0B
Complement Inhibitor Median Upfront
$560M
Total: $2.9B
FcRn Antagonist Royalties
14%-23.4%
Tiered to 27.4%
Complement Inhibitor Royalties
13.9%-23.1%
Tiered to 27.1%

Market Analysis

In immunology, FcRn Antagonist and Complement Inhibitor represent two of the most actively transacted modalities. At Phase 2, FcRn Antagonist deals carry a median total deal value of $3.0B with $583M upfront, compared to $2.9B total value and $560M upfront for Complement Inhibitor. The valuation difference reflects distinct risk-reward profiles, manufacturing complexity, and competitive dynamics.

Milestone structures diverge between the two modalities. FcRn Antagonist development milestones average $491M versus $472M for Complement Inhibitor. Commercial milestones are $1.1B for FcRn Antagonist and $1.1B for Complement Inhibitor. Royalty rates range from 14%-23.4% for FcRn Antagonist and 13.9%-23.1% for Complement Inhibitor.

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Frequently Asked Questions

How do FcRn Antagonist and Complement Inhibitor deal terms compare in immunology?
FcRn Antagonist Phase 2 deals average $3.0B total deal value ($583M upfront), while Complement Inhibitor deals average $2.9B ($560M upfront). The difference reflects modality-specific risk profiles, manufacturing considerations, and competitive positioning.
Which modality commands higher royalty rates: FcRn Antagonist or Complement Inhibitor?
FcRn Antagonist base royalties range from 14% to 23.4%, while Complement Inhibitor royalties range from 13.9% to 23.1%. High-tier escalation reaches 27.4% for FcRn Antagonist and 27.1% for Complement Inhibitor.
How do milestone structures differ between FcRn Antagonist and Complement Inhibitor?
FcRn Antagonist deals allocate $491M to development milestones vs $472M for Complement Inhibitor. Commercial milestones are $1.1B (FcRn Antagonist) vs $1.1B (Complement Inhibitor), reflecting different commercialization profiles and market expectations.
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