On October 13, 2025, Avidity Biosciences, Inc. ("Avidity") announced that based on a pre-Biologics License Application ("BLA") meeting with the U.S. Food and Drug Administration ("FDA") regarding Avidity's planned BLA submission for del-zota, Avidity has updated its expected timing for submission of the BLA to the first quarter of 2026 from its previous guidance of year end 2025 in order to provide the FDA with additional non-clinical data to support the chemistry, manufacturing, and controls ("CMC") package.