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Form 8-K · Current Report · Filed 2025-12-17

Insmed Discontinues Brensocatib in CRSsNP and Acquires INS1148

On December 17, 2025, Insmed Incorporated announced that the Phase 2b BiRCh study of brensocatib in patients with chronic rhinosinusitis without nasal polyps (CRSsNP) did not meet its primary or secondary efficacy endpoints.

Filer
Insmed Inc. INSM · NASDAQ
Filed
Accession
0001140361-25-045836
CIK
0001104506
Signal
High impactHealthcare

Details

Consequently, Insmed has discontinued the development program for brensocatib in CRSsNP. Additionally, Insmed announced the acquisition of INS1148, a monoclonal antibody for potential respiratory and immunological and inflammatory diseases, to advance its development in interstitial lung disease and moderate-to-severe asthma.

Items reported

Item 7.01

Regulation FD Disclosure

Regulation FD Disclosure
Item 8.01

Other Events

Regulatory Approval Regulatory Denial
Item 9.01

Financial Statements and Exhibits

Exhibits Furnished

Market reaction

Close before filing

$200.67

Next session

-17.0%

Since filing

-50.9%

Latest close

$98.60

What happened, not what will happen — closing prices around the filing date.

Precedent

Previous filings from INSM reporting the same item, with the next session's move:

About Insmed Inc.

Insmed Inc. is a biopharmaceutical company dedicated to enhancing the lives of patients with rare diseases. The company's primary focus is on the development and commercialization of treatments for serious and rare disorders, particularly in the fields of pulmonology and infectious diseases. One of Insmed's noteworthy products is Arikayce, an inhaled antibiotic that addresses specific pulmonary infections often affecting patients with underlying lung conditions. Insmed Inc. also undertakes robust research and development efforts to boost its pipeline of potential therapies, aiming to address unmet medical needs. Operating within the broader healthcare sector, Insmed is a key player in the biopharmaceutical landscape, driven by innovation and scientific research. The company’s continued advancements and strategic collaborations underscore its commitment to elevating patient care and expanding treatment options for rare disease patients. This aligns Insmed as a significant entity in the realm of specialized healthcare solutions, reflecting its impact on the biopharmaceutical market.

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