**MBX Biosciences Reports Financial Results and Provides Business Update in Annual Filing**
MBX Biosciences, Inc., a clinical-stage biopharmaceutical company focused on precision peptide therapies, released its financial results as part of its annual report on Form 10-K. The company reported a net loss of $87.0 million for the year ended December 31, 2025, compared to a net loss of $61.9 million for the previous year. This increase in net loss is primarily attributed to escalating research and development expenses as the company advances its clinical programs. As of December 31, 2025, MBX Biosciences had an accumulated deficit of $224.5 million.
The company's research and development expenses totaled $79.2 million in 2025, a significant increase from $57.4 million in 2024. This rise reflects increased investment in its lead product candidate, canvuparatide, as it progresses through Phase 2 clinical trials and prepares for Phase 3. The company also noted increased expenses related to the initiation of the Phase 1 clinical trial for MBX 4291, its obesity product candidate. These increases were partially offset by decreased expenses related to imapextide, as the Phase 1 clinical trial was completed in early 2025. General and administrative expenses also increased to $18.9 million, up from $10.8 million in the prior year, due to higher professional fees and personnel-related costs associated with supporting the company's growth.
MBX Biosciences highlighted key operational developments, including the ongoing Phase 2a clinical trial for imapextide, with topline results expected in the second quarter of 2026, and the initiation of a Phase 1 clinical trial for MBX 4291, with results from the 12-week multiple ascending dose portion expected in the fourth quarter of 2026. The company also anticipates nominating two additional candidates in the second and third quarters of 2026. The company also completed an End of Phase 2 meeting with the FDA and expects to receive Scientific Advice with the European Medicines Agency in the first half of 2026. As of December 31, 2025, the company had 63 full-time employees, with 45 engaged in research and development and 18 in general and administrative roles.
Looking ahead, MBX Biosciences anticipates that its existing cash, cash equivalents, and marketable securities, which totaled $373.7 million as of December 31, 2025, will be sufficient to fund its operating expenses and capital expenditure requirements into 2029. The company plans to continue advancing its pipeline of precision peptide therapies, with a focus on endocrine and metabolic disorders. The company expects to initiate a Phase 3 clinical trial of canvuparatide in the third quarter of 2026. The company also expects to nominate two additional candidates in the second and third quarters of 2026.
About MBX Biosciences, Inc.
MBX Biosciences is a clinical-stage biopharmaceutical company developing precision peptide therapies for endocrine and metabolic disorders. Its proprietary PEP platform designs long-acting, highly selective peptides with optimized pharmacokinetics for conditions like hypoparathyroidism, post-bariatric hypoglycemia, and obesity. The company focuses on innovative, convenient treatments that improve efficacy, tolerability, and patient compliance through advanced chemical modifications and programmable prodrug technologies.
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