Mirum and Incyte Announce Phase 2 Results for Zilurgisertib
Written by Emily J. Thompson, Senior Investment Analyst
Updated: Jun 14 2026
0mins
Mirum Pharmaceuticals (MIRM) and Incyte (INCY) announced Phase 2 results from Cohort 1 of the Progress study evaluating zilurgisertib, an investigational oral activin receptor-like kinase 2 inhibitor, in adolescents and adults with fibrodysplasia ossificans progressiva. Results were shared in a late-breaking rapid-fire presentation at ENDO 2026, the Endocrine Society's annual meeting. Key efficacy findings included: Fewer patients receiving zilurgisertib developed new HO lesions at Week 24, with an 81% reduction versus placebo. 99.9% reduction in total volume of new HO lesions in patients receiving zilurgisertib versus placebo at Week 24. Reduction in total existing HO lesion volume compared with an increase observed in placebo-treated patients at Week 24. Among patients receiving zilurgisertib, no new HO lesions were observed and total HO lesion volume continued to decrease from Week 24 to Week 48. Among patients who crossed over from placebo to zilurgisertib, no new HO lesions were observed and total HO lesion volume decreased from Week 24 to Week 48.
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Analyst Views on MIRM
Wall Street analysts forecast MIRM stock price to fall
9 Analyst Rating
9 Buy
0 Hold
0 Sell
Strong Buy
Current: 121.910
Low
81.00
Averages
102.33
High
140.00
Current: 121.910
Low
81.00
Averages
102.33
High
140.00
About MIRM
Mirum Pharmaceuticals, Inc. is a biopharmaceutical company. The Company is focused on the treatment of rare diseases affecting children and adults. It has three medicines: LIVMARLI (maralixibat) oral solution (Livmarli), Cholbam (cholic acid) capsules, and Chenodal or Ctexli (chenodiol) tablets. Livmarli is an orally administered, minimally-absorbed ileal bile acid transporter (IBAT) inhibitor (IBATi) that is used for the treatment of cholestatic pruritus in patients with Alagille syndrome (ALGS) in the United States and various other countries and for cholestatic pruritus in patient with progressive familial intrahepatic cholestasis (PFIC) in the United States, Canada and Japan. Cholbam is used for the treatment of bile acid synthesis disorders due to single enzyme deficiencies and adjunctive treatment of peroxisomal disorders. The Company is also advancing its product candidate, volixibat, for the treatment of adult patients with cholestatic liver diseases.
About the author
Emily J. Thompson
Emily J. Thompson, a Chartered Financial Analyst (CFA) with 12 years in investment research, graduated with honors from the Wharton School. Specializing in industrial and technology stocks, she provides in-depth analysis for Intellectia’s earnings and market brief reports.
Investors Must Maintain Emotional Neutrality
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See More
Mirum and Incyte Report Positive Results for FOP Study
- Clinical Trial Results: Mirum and Incyte's Phase II PROGRESS study of zilurgisertib showed that only 3.1% of patients developed new lesions compared to 16.7% in the placebo group, achieving an 81% reduction, indicating the drug's potential in treating this ultra-rare disease.
- Sustained Efficacy: In the open-label extension phase, no new lesions were observed among patients continuing zilurgisertib treatment at 48 weeks, with total lesion volume continuing to decline, demonstrating the drug's long-term efficacy and safety, addressing the urgent need for effective treatments.
- FDA Priority Review: Following positive clinical data, the FDA has accepted the NDA for zilurgisertib and granted Priority Review status, with a decision expected by September 26, 2026, which will expedite the drug's market entry to meet the demand for new therapies.
- Market Performance: Year-to-date, shares of Mirum and Incyte have risen by 28.5% and 1%, respectively, against a 1.4% decline in the biotech sector, reflecting investor optimism regarding their clinical advancements and enhancing their competitive position in the market.
See More
Mirum and Incyte Report Positive Phase 2 Data for Zilurgisertib
- Clinical Trial Results: Mirum Pharmaceuticals and Incyte have reported positive pivotal Phase 2 data for their oral FOP candidate, zilurgisertib, with results from Cohort 1 of the PROGRESS study showing consistent treatment effects on disease activity and durability through Week 48, indicating the drug's therapeutic potential.
- Safety Assessment: During the open-label extension, no new HO lesions were observed in patients continuing zilurgisertib treatment or in placebo patients who crossed over to active treatment at week 24, demonstrating the drug's safety and efficacy in long-term use.
- FDA Review Progress: The U.S. Food and Drug Administration (FDA) has accepted the New Drug Application for zilurgisertib and granted Priority Review, with a target action date set for September 26, 2026, laying the groundwork for the drug's market launch.
- Market Outlook: Incyte's Chief Medical Officer Steven Stein stated that the findings represent an important milestone for the zilurgisertib program, further strengthening the clinical evidence supporting its potential as a treatment for FOP, signaling future market opportunities in the rare disease sector.
See More
Mirum and Incyte Announce Positive Phase 2 Results for Zilurgisertib
- Clinical Trial Results: Mirum and Incyte presented positive results from the PROGRESS study at the 2026 ENDO meeting, showing that Zilurgisertib reduced new heterotopic ossification (HO) lesions by 81% in patients aged 12 and older over 24 weeks, indicating significant efficacy.
- Efficacy Metrics: Patients treated with Zilurgisertib experienced a 99.9% reduction in the total volume of new HO lesions at week 24, suggesting the drug's high potential in managing Fibrodysplasia Ossificans Progressiva (FOP) and possibly transforming treatment outcomes for patients.
- Safety Assessment: Zilurgisertib was generally well tolerated during the 24-week placebo-controlled period, with no new HO lesions observed, and total HO lesion volume continued to decrease from week 24 to week 48, indicating potential long-term benefits.
- Market Outlook: With approximately 300 patients in the U.S. and 900 worldwide affected by FOP, Mirum's NDA for Zilurgisertib is expected to be decided by the FDA in September 2026, which could present significant market opportunities for the company.
See More
Mirum and Incyte Announce New Progress in FOP Treatment
- Clinical Trial Results: At the ENDO 2026 conference, Mirum and Incyte presented results from Cohort 1 of the PROGRESS study, showing an 81% reduction in new heterotopic ossification lesions in patients treated with zilurgisertib, indicating significant efficacy in treating FOP.
- FDA Priority Review: The U.S. FDA has accepted the New Drug Application for zilurgisertib and granted Priority Review, with a decision expected by September 26, 2026, which could provide urgently needed treatment options for FOP patients and potentially reshape the market landscape.
- Patient Data Analysis: During the 24-week double-blind period, patients receiving zilurgisertib had significantly fewer new lesions compared to the placebo group, and no new lesions were observed during the 48-week open-label extension, demonstrating sustained treatment effects and enhancing the drug's market potential.
- Safety Assessment: The study indicated that zilurgisertib was well-tolerated during the 24-week controlled period, with most adverse events being mild or moderate and no treatment discontinuations, paving the way for future commercialization and boosting investor confidence.
See More
Mirum and Incyte Announce FOP Study Results
- Clinical Trial Results: At ENDO 2026, Mirum and Incyte presented data showing that zilurgisertib significantly reduced new HO lesions by 81% in FOP patients over 24 weeks, indicating its potential as a new treatment option for this rare disease.
- FDA Priority Review: The U.S. FDA has accepted the New Drug Application for zilurgisertib and granted it Priority Review, with a target action date of September 26, 2026, which could expedite its market entry to address urgent patient needs in the FOP community.
- Study Design and Findings: The PROGRESS study's first cohort included 63 patients, revealing significant reductions in HO lesion volume during the 24-week double-blind period, with no new lesions observed during the open-label extension, suggesting sustained efficacy.
- Safety Profile: Zilurgisertib demonstrated good tolerability during the 24-week study, with most adverse events being mild or moderate, and no treatment discontinuations, highlighting its safety and feasibility for clinical use.
See More
Investors Must Maintain Emotional Neutrality
- Investor Mindset: Robert Kiyosaki emphasizes that successful business owners and investors must maintain emotional neutrality towards winning and losing, viewing these as mere parts of the game, which helps in staying rational and patient in volatile markets.
- Twist Bioscience Performance: Twist Bioscience reported strong revenue performance for fiscal year 2025 and the first half of fiscal 2026, with third-quarter revenue expected to reach approximately $114 million to $115 million, reflecting a year-over-year growth of about 19%, showcasing its sustained growth potential in synthetic biology.
- Biodesix Clinical Validation: Biodesix's Nodify CDT test demonstrated strong performance in the largest clinical validation study for lung nodule biomarkers, with financial results for Q2 2026 expected to further boost stock prices, highlighting its leading position in early lung cancer diagnosis.
- Mirum Pharmaceuticals Progress: Mirum Pharmaceuticals' strong Q1 2026 results and the anticipated FDA decision on Zilurgisertib indicate its innovative capabilities in rare disease treatments and market confidence, which are expected to drive future stock performance.
See More
Mirum and Incyte Report Positive Results for FOP Study
- Clinical Trial Results: Mirum and Incyte's Phase II PROGRESS study of zilurgisertib showed that only 3.1% of patients developed new lesions compared to 16.7% in the placebo group, achieving an 81% reduction, indicating the drug's potential in treating this ultra-rare disease.
- Sustained Efficacy: In the open-label extension phase, no new lesions were observed among patients continuing zilurgisertib treatment at 48 weeks, with total lesion volume continuing to decline, demonstrating the drug's long-term efficacy and safety, addressing the urgent need for effective treatments.
- FDA Priority Review: Following positive clinical data, the FDA has accepted the NDA for zilurgisertib and granted Priority Review status, with a decision expected by September 26, 2026, which will expedite the drug's market entry to meet the demand for new therapies.
- Market Performance: Year-to-date, shares of Mirum and Incyte have risen by 28.5% and 1%, respectively, against a 1.4% decline in the biotech sector, reflecting investor optimism regarding their clinical advancements and enhancing their competitive position in the market.
See More
Mirum and Incyte Report Positive Phase 2 Data for Zilurgisertib
- Clinical Trial Results: Mirum Pharmaceuticals and Incyte have reported positive pivotal Phase 2 data for their oral FOP candidate, zilurgisertib, with results from Cohort 1 of the PROGRESS study showing consistent treatment effects on disease activity and durability through Week 48, indicating the drug's therapeutic potential.
- Safety Assessment: During the open-label extension, no new HO lesions were observed in patients continuing zilurgisertib treatment or in placebo patients who crossed over to active treatment at week 24, demonstrating the drug's safety and efficacy in long-term use.
- FDA Review Progress: The U.S. Food and Drug Administration (FDA) has accepted the New Drug Application for zilurgisertib and granted Priority Review, with a target action date set for September 26, 2026, laying the groundwork for the drug's market launch.
- Market Outlook: Incyte's Chief Medical Officer Steven Stein stated that the findings represent an important milestone for the zilurgisertib program, further strengthening the clinical evidence supporting its potential as a treatment for FOP, signaling future market opportunities in the rare disease sector.
See More
Mirum and Incyte Announce Positive Phase 2 Results for Zilurgisertib
- Clinical Trial Results: Mirum and Incyte presented positive results from the PROGRESS study at the 2026 ENDO meeting, showing that Zilurgisertib reduced new heterotopic ossification (HO) lesions by 81% in patients aged 12 and older over 24 weeks, indicating significant efficacy.
- Efficacy Metrics: Patients treated with Zilurgisertib experienced a 99.9% reduction in the total volume of new HO lesions at week 24, suggesting the drug's high potential in managing Fibrodysplasia Ossificans Progressiva (FOP) and possibly transforming treatment outcomes for patients.
- Safety Assessment: Zilurgisertib was generally well tolerated during the 24-week placebo-controlled period, with no new HO lesions observed, and total HO lesion volume continued to decrease from week 24 to week 48, indicating potential long-term benefits.
- Market Outlook: With approximately 300 patients in the U.S. and 900 worldwide affected by FOP, Mirum's NDA for Zilurgisertib is expected to be decided by the FDA in September 2026, which could present significant market opportunities for the company.
See More
Mirum and Incyte Announce New Progress in FOP Treatment
- Clinical Trial Results: At the ENDO 2026 conference, Mirum and Incyte presented results from Cohort 1 of the PROGRESS study, showing an 81% reduction in new heterotopic ossification lesions in patients treated with zilurgisertib, indicating significant efficacy in treating FOP.
- FDA Priority Review: The U.S. FDA has accepted the New Drug Application for zilurgisertib and granted Priority Review, with a decision expected by September 26, 2026, which could provide urgently needed treatment options for FOP patients and potentially reshape the market landscape.
- Patient Data Analysis: During the 24-week double-blind period, patients receiving zilurgisertib had significantly fewer new lesions compared to the placebo group, and no new lesions were observed during the 48-week open-label extension, demonstrating sustained treatment effects and enhancing the drug's market potential.
- Safety Assessment: The study indicated that zilurgisertib was well-tolerated during the 24-week controlled period, with most adverse events being mild or moderate and no treatment discontinuations, paving the way for future commercialization and boosting investor confidence.
See More
Mirum and Incyte Announce FOP Study Results
- Clinical Trial Results: At ENDO 2026, Mirum and Incyte presented data showing that zilurgisertib significantly reduced new HO lesions by 81% in FOP patients over 24 weeks, indicating its potential as a new treatment option for this rare disease.
- FDA Priority Review: The U.S. FDA has accepted the New Drug Application for zilurgisertib and granted it Priority Review, with a target action date of September 26, 2026, which could expedite its market entry to address urgent patient needs in the FOP community.
- Study Design and Findings: The PROGRESS study's first cohort included 63 patients, revealing significant reductions in HO lesion volume during the 24-week double-blind period, with no new lesions observed during the open-label extension, suggesting sustained efficacy.
- Safety Profile: Zilurgisertib demonstrated good tolerability during the 24-week study, with most adverse events being mild or moderate, and no treatment discontinuations, highlighting its safety and feasibility for clinical use.
See More
