Enanta Pharmaceuticals Reports Financial Results for its Fiscal First Quarter Ended December 31, 2025

WATERTOWN, Mass.--(BUSINESS WIRE)--Enanta Pharmaceuticals, Inc.(NASDAQ:ENTA), a clinical-stage biotechnology company dedicated to creating small molecule drugs for viral infections and immunological diseases, today reported financial results for its fiscal first quarter ended December 31, 2025.

“Enanta entered the year with significant momentum, advancing our leading RSV treatment portfolio with preparation for a Phase 3 study and expanding our immunology pipeline with the introduction of our third program focused on developing oral MRGPRX2 inhibitors for type 2 immune driven diseases,” said Jay R. Luly, Ph.D., President and Chief Executive Officer at Enanta Pharmaceuticals. “With zelicapavir demonstrating clinically meaningful benefits in pediatric and high‑risk adult RSV studies and EDP‑323 showing promise not only in treatment, but also in post‑exposure prophylaxis, we are driving forward first-in-disease programs that have the potential to fundamentally change RSV patient care. In tandem, we are further building out our immunology portfolio, which now includes highly selective inhibitors of KIT, STAT6 and MRGPRX2.”

Fiscal First Quarter Ended December 31, 2025 Financial Results

Total revenue for the three months ended December 31, 2025 was $18.6 million and consisted of royalty revenue from worldwide net sales of MAVYRET®/MAVIRET®(glecaprevir/pibrentasvir), AbbVie’s eight-week treatment for chronic hepatitis C virus, compared to $17.0 million for the three months ended December 31, 2024. The increase in revenue is due to an increase in AbbVie’s product sales.

A portion (54.5%) of Enanta’s ongoing royalty revenue from AbbVie’s net sales of MAVYRET®/MAVIRET®is paid to OMERS, one of Canada’s largest defined benefit pension plans, pursuant to a royalty sale transaction affecting royalties earned after June 2023. For financial reporting purposes, the transaction was treated as debt, with the upfront purchase payment of $200.0 million recorded as a liability. Each quarter, Enanta records 100% of the royalty earned as revenue and then amortizes the debt liability proportionally as 54.5% of the cash royalty payments are paid to OMERS through June 30, 2032. This is subject to a cap of 1.42 times the purchase payment, after which point 100% of the cash royalty payments will be retained by Enanta. Interest expense was $3.1 million for the three months ended December 31, 2025, as compared to interest expense of $2.0 million for the three months ended December 31, 2024.

Research and development expenses totaled $20.9 million for the three months ended December 31, 2025, compared to $27.7 million for the three months ended December 31, 2024. The decrease was due to a decrease in clinical trial expenses for Enanta’s RSV programs, partially offset by increased costs associated with the Company’s immunology programs.

General and administrative expenses totaled $9.0 million for the three months ended December 31, 2025, compared to $12.8 million for the three months ended December 31, 2024. The decrease was due to a decrease in stock-based compensation expenses and a decrease in legal expenses related to the Company’s patent infringement lawsuits against Pfizer.

Interest and investment income, net, totaled $2.4 million for the three months ended December 31, 2025, compared to $2.8 million for the three months ended December 31, 2024. The decrease in interest and investment income was due to lower interest rates year over year.

Enanta recorded an income tax expense of less than $0.1 million for the three months ended December 31, 2025, compared to an income tax benefit of $0.4 million for the three months ended December 31, 2024. Enanta recorded interest earned on its federal income tax refund during the three months ended December 31, 2024, until the $33.8 million refund was received in April 2025.

Net loss for the three months ended December 31, 2025 was $11.9 million, or a loss of $0.42 per diluted common share, compared to a net loss of $22.3 million, or a loss of $1.05 per diluted common share, for the corresponding period in 2024.

Enanta’s cash, cash equivalents and short-term and long-term marketable securities totaled $241.9 million at December 31, 2025. Enanta expects that its current cash, cash equivalents and marketable securities, as well as its retained portion of future royalty revenue, will be sufficient to meet the anticipated cash requirements of its existing business and development programs into fiscal 2029.

Virology

Enanta’s virology pipeline includes the leading portfolio in development for oral RSV treatment, consisting of zelicapavir, Enanta’s lead, once-daily N-protein inhibitor, and EDP-323, its once-daily L-protein inhibitor, both of which received Fast Track designation from the U.S. Food and Drug Administration.

Immunology

Enanta’s immunology pipeline is focused on designing and developing highly potent and selective oral inhibitors for the treatment of inflammatory diseases, by targeting key drivers of the type 2 immune response.

Corporate

About Enanta Pharmaceuticals, Inc.

Enanta is using its robust, chemistry-driven approach and drug discovery capabilities to become a leader in the discovery and development of small molecule drugs for viral infections and immunological diseases. Enanta’s clinical programs are currently focused on respiratory syncytial virus (RSV) and its earlier-stage immunology pipeline aims to develop treatments for inflammatory diseases by targeting key drivers of the type 2 immune response, with KIT, STAT6 and MRGPRX2 inhibition.

Glecaprevir, a protease inhibitor discovered by Enanta, is part of one of the leading treatment regimens for curing hepatitis C virus (HCV) infection and is sold by AbbVie in numerous countries under the tradenames MAVYRET®(U.S.) and MAVIRET®(ex-U.S.) (glecaprevir/pibrentasvir). A portion of Enanta’s royalties from HCV products developed under its collaboration with AbbVie contribute ongoing funding to Enanta’s operations. Please visitwww.enanta.comfor more information.

Forward Looking Statements

This press release contains forward-looking statements, including statements with respect to the timeline and prospects for advancement of Enanta’s clinical programs in RSV and its preclinical immunology programs, including its programs targeting KIT, STAT6 and MRGPRX2 inhibition. Statements that are not historical facts are based on management’s current expectations, estimates, forecasts and projections about Enanta’s business and the industry in which it operates and management’s beliefs and assumptions. The statements contained in this release are not guarantees of future performance and involve certain risks, uncertainties and assumptions, which are difficult to predict. Therefore, actual outcomes and results may differ materially from what is expressed in such forward-looking statements. Important factors and risks that may affect actual results include: the impact of development, regulatory and marketing efforts of others with respect to vaccines and competitive treatments for RSV; the discovery and development risks of Enanta’s programs in virology and immunology; Enanta’s limited clinical development experience; Enanta’s ability to partner its RSV or other programs; Enanta’s need to attract and retain senior management and key research and development personnel; Enanta’s need to obtain and maintain patent protection for its product candidates and avoid potential infringement of the intellectual property rights of others; and other risk factors described or referred to in “Risk Factors” in Enanta’s Form 10-K for the fiscal year-ended September 30, 2025, and any other periodic reports filed more recently with the Securities and Exchange Commission. Enanta cautions investors not to place undue reliance on the forward-looking statements contained in this release. These statements speak only as of the date of this release, and Enanta undertakes no obligation to update or revise these statements, except as may be required by law.

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