Globenewswire·2026-02-18 20:55Core Viewpoint - Rosen Law Firm is reminding investors who purchased common stock of Ultragenyx Pharmaceutical Inc. during the specified class period of the upcoming lead plaintiff deadline for a class action lawsuit [1]. Group 1: Class Action Details - Investors who bought Ultragenyx common stock between August 3, 2023, and December 26, 2025, may be eligible for compensation without any out-of-pocket fees through a contingency fee arrangement [2]. - A class action lawsuit has already been filed, and interested parties must move the Court to serve as lead plaintiff by April 6, 2026 [3]. Group 2: Law Firm Credentials - Rosen Law Firm emphasizes the importance of selecting qualified legal counsel with a successful track record in securities class actions, highlighting its own achievements, including the largest securities class action settlement against a Chinese company [4]. - The firm has consistently ranked among the top firms for securities class action settlements, recovering hundreds of millions of dollars for investors, including over $438 million in 2019 alone [4]. Group 3: Case Background - The lawsuit alleges that Ultragenyx's defendants provided misleading information regarding the expected results of its Phase III studies for setrusumab (UX 143) in treating Osteogenesis Imperfecta [5]. - It is claimed that while setrusumab increased bone density, it did not correlate with a decrease in annualized fracture rates, contrary to the positive statements made by the defendants [6].