Core Insights - Mirum Pharmaceuticals reported a narrower loss of $0.12 per share for Q2 2025, compared to a loss of $0.52 per share in the same quarter last year, and better than the Zacks Consensus Estimate of a loss of $0.31 per share [1][8] - Revenues for Q2 2025 reached $127.8 million, reflecting a year-over-year increase of 64.1%, surpassing the Zacks Consensus Estimate of $108 million, driven by strong sales of Livmarli and newly acquired bile acid products [2][8] - The company raised its revenue guidance for 2025 to a range of $490 million to $510 million, up from the previous estimate of $435 million to $450 million, due to the strong performance of Livmarli [10] Financial Performance - Livmarli's net product sales were $88.2 million in Q2 2025, marking an 87% increase year-over-year, with U.S. sales at $57 million and ex-U.S. sales at $31.2 million [7][8] - Net product sales from bile acid products, including Cholbam and Ctexli, totaled $39.6 million in Q2 2025, reflecting a 30% year-over-year increase [7] - Research and development expenses rose by nearly 41% year-over-year to $46.1 million, while selling, general, and administrative expenses increased by approximately 28.7% to $63.3 million [9] Recent Developments - Mirum is conducting a phase III EXPAND study for Livmarli to treat pruritus in rare cholestatic conditions, with enrollment expected to complete in 2026 [11] - The FDA approved a new tablet formulation of Livmarli, launched in the U.S. in June 2025, aimed at improving convenience for older patients [11] - The lead pipeline candidate, volixibat, is under evaluation in two phase IIb studies for primary biliary cholangitis and primary sclerosing cholangitis, with top-line data expected in Q2 2026 [12] Stock Performance - Mirum's shares increased by 8.6% in after-hours trading on August 6, 2025, following the better-than-expected results and raised revenue guidance [4] - Year-to-date, Mirum's stock has risen by 29.1%, significantly outperforming the industry average increase of 0.2% [6]