4D Molecular Therapeutics Reports Positive Interim Data from 4D-710 Clinical Trial
4D Molecular Therapeutics announced positive interim clinical data from the 4D-710 Phase 1 AEROW clinical trial for the treatment of cystic fibrosis lung disease. AEROW Phase 1 Interim Data: No new pulmonary or other safety events occurred since previous update in higher-dose cohorts with up to 3.5 years of follow-up; In lower-dose cohorts, 4D-710-related adverse events were generally mild, transient and resolved by 2 months, with no 4D-710-related severe adverse events; Airway biopsy and brushing results demonstrated consistent and dose-dependent CFTR transgene RNA levels at or above physiologically relevant levels in non-CF control samples. In 2.5E14 vg dose cohort, results met target expression profile In 2.5E14 vg dose cohort, consistent evidence of clinically meaningful activity detected in all endpoints, including ppFEV1, LCI2.5 and quality of life through 1 year; Based on evaluation of safety, tissue expression and efficacy data, 2.5E14 vg was selected as the Phase 2 dose
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- Employee Incentive Program: On January 13, 2026, 4D Molecular Therapeutics' compensation committee granted 23,600 Restricted Stock Units (RSUs) to four new non-executive employees, aimed at attracting talent and enhancing team stability.
- Equity Grant Context: The RSUs were awarded under the 2025 Employment Inducement Award Plan, approved by the board in February 2025, complying with Nasdaq Rule 5635(c)(4), reflecting the company's commitment to talent acquisition.
- Product Development Progress: The company's lead product, 4D-150, is currently in Phase 3 trials, designed to provide multi-year sustained delivery of anti-VEGF through a single safe intravitreal injection, significantly reducing the treatment burden associated with current methods, showcasing transformative potential.
- Gene Therapy Innovation: The second candidate, 4D-710, is the first known genetic medicine to successfully deliver and express the CFTR transgene in the lungs of cystic fibrosis patients, demonstrating the company's innovative capabilities and market potential in the therapeutic landscape.

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Stock Performance: 4D Molecular Therapeutics (FDMT) shares fell approximately 15% following the announcement of updated data from an early-stage trial for its cystic fibrosis therapy, 4D-710.
Trial Findings: The Phase 1 AEROW clinical trial indicated no new safety events in higher-dose groups, leading the company to select a specific dose for the upcoming Phase 2 trial.
Trial Design: The AEROW trial evaluated different doses of 4D-710 in adults with cystic fibrosis lung disease who cannot tolerate standard CFTR modulator therapy.
Future Plans: 4D Molecular Therapeutics aims to complete enrollment for the Phase 2 Dose-Expansion cohort by the first half of 2026, with a program update anticipated in the latter half of the year.

- Positive Clinical Data: 4D-710 demonstrated good tolerability and achieved physiologically relevant CFTR expression levels in the AEROW trial, indicating potential clinical benefits across multiple lung function and symptom measures, suggesting its promise as a cystic fibrosis treatment.
- Patient Recruitment Progress: As of December 1, 2025, the AEROW trial has enrolled 16 cystic fibrosis patients, with no new safety events reported across different dose cohorts, underscoring the treatment's safety and efficacy.
- Successful Dose Selection: The 2.5E14 vg dose cohort showed clinically meaningful activity across all endpoints, supporting its selection for the next phase and further optimizing the treatment regimen.
- Future Milestones: The company anticipates completing enrollment of the AEROW Phase 2 Dose-Expansion cohort in H1 2026, further validating the efficacy of 4D-710, with plans to share additional updates in H2 2026.

Positive Interim Results: 4D Molecular Therapeutics reported encouraging interim results from its Phase 1 AEROW study for 4D-710, a gene therapy for cystic fibrosis, showing significant improvements in lung function over a one-year follow-up.
Durable CFTR Expression: The study demonstrated sustained CFTR transgene expression within the therapeutic range for at least one year, indicating potential long-term benefits for patients.
Future Plans: The company anticipates completing enrollment for the Phase 2 dose-expansion cohort by mid-2026, with an update on the program expected in the latter half of 2026.
Stock Performance: Following the announcement, FDMT shares rose by 5.21%, closing at $11.52.

- Employee Incentive Program: On December 9, 2025, 4D Molecular Therapeutics granted 13,800 Restricted Stock Units (RSUs) to three new non-executive employees, aimed at attracting new talent through the 2025 Employment Inducement Award Plan, thereby enhancing the company's human resource competitiveness.
- Board Approval: The plan was approved by the board in February 2025, complying with Nasdaq Global Market Rule 5635(c)(4), indicating the company's commitment to attracting and retaining key talent, which will further drive its biotechnology innovations.
- Product Development Context: The company's lead product candidate, 4D-150, is currently in Phase 3 clinical trials, designed to provide multi-year sustained anti-VEGF delivery through a single safe intravitreal injection, significantly reducing the treatment burden associated with current methods and improving patient experience.
- Market Potential: With the development of product candidates like 4D-150 and 4D-710, the company is poised to achieve breakthroughs in treating blinding retinal vascular diseases and cystic fibrosis, further solidifying its market position in the biotechnology sector.






