BBP-418 Demonstrates Consistent Efficacy and Favorable Safety Profile in Phase 3 FORTIFY Interim Analysis in LGMD2I/R9
Rhea-AI Summary
BridgeBio (Nasdaq: BBIO) presented positive Phase 3 FORTIFY interim data for oral BBP-418 in LGMD2I/R9 showing rapid, consistent efficacy and a favorable safety profile.
Key results: 31-second 100MTT benefit at 12 months, CK reductions with 38.3% normalization, comparable serious adverse event rates, and an intended NDA submission in H1 2026.
Positive
- 100MTT improvement: ~31 seconds faster at 12 months versus placebo
- CK biomarker response: 38.3% achieved CK normalization at 12 months
- 10MWT functional gain: +0.13 m/s vs placebo decline of 0.10 m/s
- Safety: Grade ≥3 TEAEs similar (~5.4%) between BBP-418 and placebo
- Regulatory path: Company intends to submit an NDA in H1 2026
Negative
- High overall TEAE incidence: 93.2% in BBP-418 arm (many mild–moderate)
- Common GI events: diarrhea reported in 39.2% of BBP-418 patients
- Potential commercialization timing risk: U.S. launch anticipated only in late 2026/early 2027
News Market Reaction – BBIO
In the Mar 11 session, BBIO declined 3.94%, reflecting a moderate negative market reaction.
Data tracked by StockTitan Argus on the day of publication.
Key Figures
Previous Clinical trial Reports
| Date | Event | Sentiment | 24h Move | Catalyst |
|---|---|---|---|---|
| Mar 04 | FORTIFY data preview | Positive | +3.1% | Announced additional interim FORTIFY data and late-breaking MDA presentation plans. |
| Feb 12 | Phase 3 topline | Positive | +3.7% | Reported positive Phase 3 PROPEL 3 topline results for oral infigratinib in achondroplasia. |
| Oct 29 | Phase 3 topline | Positive | +3.3% | Released positive Phase 3 CALIBRATE data for encaleret in ADH1 meeting key endpoints. |
| Oct 27 | FORTIFY topline | Positive | +17.1% | Announced positive topline Phase 3 FORTIFY results for BBP‑418 in LGMD2I/R9. |
| Sep 06 | Phase 2 results | Positive | +1.7% | Shared positive Phase 2 proof‑of‑concept data for encaleret in post‑surgical hypoparathyroidism. |
24h Move is the share-price change in the day after each event; other market factors may also have contributed.
Recent clinical trial announcements have generally produced positive single- to double-digit price gains, with the largest move tied to earlier BBP-418 FORTIFY data.
Over the past six months, BridgeBio has repeatedly reported positive late-stage clinical data. Prior FORTIFY topline results for BBP‑418 in LGMD2I/R9 on Oct 27, 2025 drove a +17.14% move, while other Phase 3 readouts for infigratinib and encaleret produced mid-single-digit gains. A March 4, 2026 update previewed additional FORTIFY data and a late‑breaking MDA presentation, with a +3.11% reaction. Today’s detailed interim analysis and NDA timing fit this pattern of value-driving clinical catalysts.
Key Terms
100-meter timed test (100MTT) medical
10-meter walk test (10MWT) medical
treatment-emergent adverse events (TEAEs) medical
upper limit of normal (ULN) medical
forced vital capacity (FVC) medical
ICD-10-CM code medical
health care resource utilization (HCRU) medical
quality-adjusted life-years medical
AI-generated analysis. How Rhea-AI works. Not financial advice.
- Phase 3 FORTIFY interim analysis results presented in a late-breaking oral presentation at MDA highlight the broad and consistent efficacy of BBP-418 across key clinical endpoints and prespecified subgroups
- Early separation from placebo observed in 100MTT, with improvements in ambulation evident as early as three months following initiation of BBP-418 treatment
- Based on the positive interim analysis results, BridgeBio intends to submit an NDA to the FDA for traditional approval in the first half of 2026 with a U.S. launch anticipated in late 2026/early 2027
- If successful, BBP-418 could be the first approved therapy for individuals living with LGMD2I/R9, potentially representing the first approval of a therapy for any form of LGMD
PALO ALTO, Calif., March 11, 2026 (GLOBE NEWSWIRE) -- BridgeBio Pharma, Inc. (Nasdaq: BBIO) (“BridgeBio” or the “Company”), a biopharmaceutical company focused on developing medicines for genetic conditions, today presented additional positive data from the interim analysis of FORTIFY, the Phase 3 clinical trial of oral BBP-418, in individuals with limb-girdle muscular dystrophy type 2I/R9 (LGMD2I/R9). These data were presented at the MDA Clinical and Scientific Conference in a late-breaking oral presentation by Katherine Mathews, M.D., Professor of Pediatrics and Neurology at the University of Iowa’s Roy J. and Lucille A. Carver College of Medicine.
“People living with LGMD2I/R9 face a real unmet medical need. There is currently no specific treatment, the disease often has an early age of onset, and it is relentlessly progressive, leading to irreversible loss of motor function,” said Dr. Mathews. “The early separation from placebo on 100MTT is especially encouraging. In a progressive muscle disease where time matters, seeing early improvements in ambulation suggests a rapid onset of action of BBP-418. The improved motor and pulmonary functions seen in this interim analysis, together with a favorable safety profile, are exciting and suggest this will be a treatment with meaningful clinical impact.”
New efficacy findings presented from the interim analysis include the following:
- Demographics, baseline characteristics, and baseline values across key endpoints were generally well balanced between the BBP-418 and placebo arms
- Treatment with BBP-418 resulted in a rapid and sustained reduction in serum creatine kinase (CK), with decreases observed as early as three months and maintained through 12 months. Among individuals treated with BBP-418 for 12 months,
59.6% achieved CK levels within 2x the Upper Limit of Normal (ULN), and38.3% achieved normalization of CK levels. The ULN is the highest value within the normal range for serum CK - BBP-418 demonstrated a rapid time to separation on the 100-meter timed test (100MTT), with improvements in ambulation showing separation from placebo as early as three months post treatment. At 12 months, individuals treated with BBP-418 completed the 100MTT approximately 31 seconds faster than those receiving placebo
- On another measure of ambulation, the 10-meter walk test (10MWT), BBP-418-treated participants improved from baseline by 0.13 m/s, compared to a decline of 0.10 m/s in the placebo arm
- Consistent treatment effect observed across all prospectively defined subgroups, including genotype, age, and baseline forced vital capacity (FVC), with point estimates favoring BBP-418 for alpha-dystroglycan (αDG), CK, 100MTT, and FVC
New safety findings presented from the interim analysis include the following:
- BBP-418 was generally well tolerated, with a safety profile comparable to placebo. Treatment-emergent adverse events (TEAEs) were reported in
93.2% of individuals receiving BBP-418 and100% of individuals receiving placebo. Grade ≥3 TEAEs occurred at similar rates between groups (5.4% for BBP-418 vs.5.3% for placebo) - Serious TEAEs were reported in
5.4% of BBP-418-treated individuals compared to7.9% of those receiving placebo. No treatment-related serious TEAEs were reported in either arm, and no deaths occurred during the study - The most common treatment-emergent adverse events (≥
10% in the BBP-418 arm) were diarrhea (39.2% vs.52.6% for placebo), procedural pain (20.3% vs.10.5% ), fall (18.9% vs.26.3% ), nasopharyngitis (17.6% vs.21.1% ), nausea (16.2% vs.7.9% ), arthralgia (14.9% vs.10.5% ), headache and COVID-19 (10.8% vs.13.2% ), and influenza (10.8% vs.7.9% ) - All events of diarrhea were mild to moderate (Grade 1–2) and no serious TEAEs related to diarrhea were reported
- No new or unexpected safety findings, relative to prior clinical experience, with BBP-418 were observed. There was no laboratory pattern suggestive of hepatic, renal, cardiac, hematologic, or metabolic toxicity, and no clinically meaningful changes were observed in ECG or echocardiographic parameters
In addition to the late-breaking oral presentation at the MDA and Clinical Scientific Conference, one additional oral presentation and four posters were also shared, which focused on advancing the understanding of BBP-418 and LGMD2I/R9. These findings included:
- A High-Throughput Assay for Measuring Ribitol Response Across FKRP Variants, presented by Yujiao Yang, Ph.D., Postdoctoral Associate in the Laboratory of Monkol Lek at Yale School of Medicine
- This high-throughput, cell-based assay provides a scalable framework for systematically evaluating therapeutic responsiveness across the full spectrum of possible FKRP variants in LGMD2I/R9.
- Systematic Literature Review of Clinical Outcomes and Disease Burden in LGMD2I/R9, presented by Karen Bartley, Ph.D., MPH, Senior Director of Value and Health Economics at BridgeBio
- Findings from this systematic literature review highlight the substantial impact on health due to LGMD2I/R9 and identify key evidence gaps, including limited data on economic and caregiver burden
- Real-World Insights into LGMD, Including Subtype 2I/R9: Treatment Patterns, Health Care Resource Utilization, and Costs, presented by Karen Bartley, Ph.D., MPH, Senior Director of Value and Health Economics at BridgeBio
- Limited data exist on healthcare resource utilization (HCRU) in LGMD2I/R9. Results from this analysis demonstrate substantial clinical burden, elevated comorbidity, and significantly higher HCRU and medical costs among individuals with LGMD2I/R9. Introduction of the specific ICD-10-CM code for LGMD2I/R9, G71.036, should improve identification and enable more robust research in this population
- Long-Term Survival, Quality-Adjusted Life-Years, and Economic Burden in LGMD2I/R9: A Health Outcomes Model, presented by Karen Bartley, Ph.D., MPH, Senior Director of Value and Health Economics at BridgeBio
- LGMD2I/R9 was associated with reduced life years and quality-adjusted life years, driven primarily by cardiomyopathy and loss of ambulation, with outcomes and lifetime burden varying by genotype. Findings from this health outcomes model are consistent with patterns observed in other muscular dystrophies and underscore the substantial burden of LGMD2I/R9
- The Journey of BBP-418: From LGMD2I/R9 Disease Pathophysiology to Registrational Clinical Trials, presented by Canan Bilgin, M.D., Senior Director of Clinical Development at BridgeBio
- Over a decade of foundational research has elucidated the pathophysiology of LGMD2I/R9, identified a potential disease-modifying therapy, and enabled both functional and biomarker-driven clinical evaluation of BBP-418 in LGMD2I/R9
- Over a decade of foundational research has elucidated the pathophysiology of LGMD2I/R9, identified a potential disease-modifying therapy, and enabled both functional and biomarker-driven clinical evaluation of BBP-418 in LGMD2I/R9
BridgeBio intends to submit an NDA to the FDA for traditional approval in the first half of 2026 with a U.S. launch anticipated in late 2026/early 2027. The Company is also engaging regulatory agencies to identify an expedited path to approval for BBP-418 in Europe. If successful, BBP-418 could be the first approved therapy for individuals living with LGMD2I/R9, potentially representing the first approval of a therapy for any form of LGMD. BridgeBio intends to initiate clinical studies of BBP-418 in LGMD2I/R9 for individuals less than 12 years of age and in LGMD2M/2U in the near future.
About BridgeBio
BridgeBio exists to develop transformative medicines for genetic conditions. Millions of people worldwide living with genetic conditions lack treatment options, often because drug development for small patient populations can be commercially challenging. We aim to bridge the gap between advancements in genetic science and meaningful medicines for underserved patient populations. Our decentralized, hub-and-spoke model is designed for speed, precision, and scalability. Autonomous and empowered teams focus on individual conditions, while a central hub provides the clinical, regulatory, and commercial capabilities needed to bring innovation to market. For more information, visit bridgebio.com and follow us on LinkedIn, X, Facebook, Instagram, YouTube, and TikTok.
BridgeBio Forward-Looking Statements
This press release contains forward-looking statements. Statements in this press release may include statements that are not historical facts and are considered forward-looking within the meaning of Section 27A of the Securities Act of 1933, as amended (the Securities Act), and Section 21E of the Securities Exchange Act of 1934, as amended (the Exchange Act), which are usually identified by the use of words such as “anticipates,” “believes,” “estimates,” “expects,” “hopes,” “intends,” “may,” “plans,” “projects,” “remains,” “seeks,” “should,” “continue,” “will,” and variations of such words or similar expressions, or the negative of these terms or other comparable terminology are intended to identify forward-looking statements, though not all forward-looking statements necessarily contain these identifying words. We intend these forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in Section 27A of the Securities Act and Section 21E of the Exchange Act. These forward-looking statements, including express and implied statements relating to the Phase 3 FORTIFY interim analysis results for BBP-418 in LGMD21/R9, including with respect to the efficacy, safety and the clinical, therapeutic and market potential of BBP-418; our plans to submit a NDA for BBP-418 to the FDA in the first half of 2026; our anticipation of the U.S. launch of BBP-418, if approved, in late 2026/early 2027; the potential clinical impact of BBP-418 for people living with LGMD21/R9 in the quote of Dr. Mathews; our expected interactions with regulatory authorities to identify an expedited path to approval for BBP-418 in Europe; and our plans to initiate clinical studies of BBP-418 in LGMD21/R9 for individuals less than 12 years of age and in LGMD2M/2U, reflect our current views about our plans, intentions, expectations and strategies, which are based on the information currently available to us and on assumptions we have made. Although we believe that our plans, intentions, expectations, and strategies as reflected in or suggested by those forward-looking statements are reasonable, we can give no assurance that the plans, intentions, expectations, or strategies will be attained or achieved. Furthermore, actual results may differ materially from those described in the forward-looking statements and will be affected by a number of risks, uncertainties and assumptions, including, but not limited to, initial and ongoing data from our preclinical studies and clinical trials not being indicative of final data, the potential size of the target patient populations our product candidates are designed to treat not being as large as anticipated, the design and success of ongoing and planned clinical trials, difficulties with enrollment in our clinical trials, adverse events that may be encountered in our clinical trials, future regulatory filings, approvals and/or sales, despite having ongoing and future interactions with the FDA or other regulatory agencies to discuss potential paths to registration for our product candidates, the FDA or such other regulatory agencies not agreeing with our regulatory approval strategies, components of our filings, such as clinical trial designs, conduct and methodologies, or the sufficiency of data submitted, the continuing success of our collaborations, our ability to obtain additional funding, potential volatility in our share price, the impacts of current macroeconomic and geopolitical events, increasing rates of inflation and changing interest rates, on our overall business operations and expectations, as well as those risks set forth in the Risk Factors section of our most recent Annual Report on Form 10-K and our other filings with the U.S. Securities and Exchange Commission. Except as required by applicable law, we assume no obligation to update publicly any forward-looking statements, whether as a result of new information, future events or otherwise.
BridgeBio Media Contact:
Bubba Murarka, Executive Vice President, Corporate Development
contact@bridgebio.com
(650)-789-8220
BridgeBio Investor Contact:
Chinmay Shukla, Senior Vice President, Strategic Finance
ir@bridgebio.com
