# Flagship Put a $50 Million Bet That Could Upend Gene Therapy Biggest Moats

- slug: flagship-put-a-50-million-bet-that-could-upend-gene-therapy-biggest-moats
- date: 2026-04-21
- category: Biotech & Life Sciences

Flagship just committed $50M to Serif Biomedicines, a new gene therapy company run by Jake Rubens. The bet: cracking delivery, the field is oldest unsolved problem. If he succeeds, the rare-disease moats that made Spark ($4.3B) and uniQure billion-dollar prizes may not survive.

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