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Jayson Dallas Leaves Ultragenyx for CEO Post at Aimmune

Xconomy San Francisco — 

Jayson Dallas has been appointed CEO of food allergy therapy developer Aimmune Therapeutics. Before joining Brisbane, CA-based Aimmune, Dallas was the chief commercial officer of Ultragenyx (NASDAQ: RARE) in Novato, CA. Dallas succeeds Stephen Dilly, who last year announced his plans to retire from Aimmune. The company says Dilly will continue to serve as an advisor through the end of the year. Aimmune is preparing to file for FDA approval of AR101, the company’s experimental immunotherapy for peanut allergy.