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Gene Therapy vs RNAi / siRNA — Neurology Deal Terms Comparison

Gene Therapy Median Upfront
$331M
Total: $3.0B
RNAi / siRNA Median Upfront
$395M
Total: $3.5B
Gene Therapy Royalties
12.3%-19.7%
Tiered to 23.7%
RNAi / siRNA Royalties
12.9%-20.6%
Tiered to 24.6%

Market Analysis

In neurology, Gene Therapy and RNAi / siRNA represent two of the most actively transacted modalities. At Phase 2, Gene Therapy deals carry a median total deal value of $3.0B with $331M upfront, compared to $3.5B total value and $395M upfront for RNAi / siRNA. The valuation difference reflects distinct risk-reward profiles, manufacturing complexity, and competitive dynamics.

Milestone structures diverge between the two modalities. Gene Therapy development milestones average $874M versus $1.0B for RNAi / siRNA. Commercial milestones are $821M for Gene Therapy and $961M for RNAi / siRNA. Royalty rates range from 12.3%-19.7% for Gene Therapy and 12.9%-20.6% for RNAi / siRNA.

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Frequently Asked Questions

How do Gene Therapy and RNAi / siRNA deal terms compare in neurology?
Gene Therapy Phase 2 deals average $3.0B total deal value ($331M upfront), while RNAi / siRNA deals average $3.5B ($395M upfront). The difference reflects modality-specific risk profiles, manufacturing considerations, and competitive positioning.
Which modality commands higher royalty rates: Gene Therapy or RNAi / siRNA?
Gene Therapy base royalties range from 12.3% to 19.7%, while RNAi / siRNA royalties range from 12.9% to 20.6%. High-tier escalation reaches 23.7% for Gene Therapy and 24.6% for RNAi / siRNA.
How do milestone structures differ between Gene Therapy and RNAi / siRNA?
Gene Therapy deals allocate $874M to development milestones vs $1.0B for RNAi / siRNA. Commercial milestones are $821M (Gene Therapy) vs $961M (RNAi / siRNA), reflecting different commercialization profiles and market expectations.
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