Mirum Pharmaceuticals, Inc. MIRM Number of Class Action Lawsuits

Based on the Company initiating the litigation, the Defendants are subject to a 30-month stay of final regulatory approval through March 29, 2029, preventing them from marketing generic versions of LIVMARLI during that time. On February 20, 2026, Sandoz asserted counterclaims against the Company and its co-plaintiffs seeking declaratory judgments of non-infringement and invalidity with respect to certain LIVMARLI Patents. On March 30, 2026, Biophore asserted counterclaims against the Company and its co-plaintiffs seeking declaratory judgments of non-infringement and invalidity with respect to certain LIVMARLI Patents. On April 22, 2026, the Company had listed newly issued U.S. Patent No. 12,599,602 in the Orange Book, and on May 18, 2026, the Company, together with its co-plaintiffs filed amended complaints against Sandoz, Hetero, Biophore and Zydus asserting the ’602 patent. On June 1, 2026, Biophore asserted a counterclaim seeking declaratory judgment of non-infringement and invalidity with respect to the ’602 patent. On June 17, 2026, Sandoz asserted a counterclaim seeking declaratory judgment of non-infringement and invalidity with respect to the ’602 patent. The Company and its co-plaintiffs have denied all asserted declaratory judgment claims. On April 16, 2026, the Court ordered that the four pending cases against Sandoz, Hetero, Biophore and Zydus be consolidated for pretrial purposes. The Court issued a scheduling order on May 19, 2026. A Markman hearing is set for April 21, 2027. Trial in the LIVMARLI Patent Litigations is set for September 18, 2028. Discovery is ongoing. The Company cannot make any predictions about the final outcome of these matters or the timing thereof.