On November 12, 2025 Prelude Therapeutics Incorporated (Nasdaq: PRLD), a precision oncology company, reported its financial results for third quarter ended September 30, 2025, and provided an update on its pipeline and other corporate developments.
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"Last week, we announced a number of strategic updates that significantly strengthen and shape our path forward heading into 2026," stated Kris Vaddi, Ph.D., Chief Executive Officer of Prelude. "We have two promising programs advancing rapidly towards clinical development – our mutant selective JAK2V617F inhibitor program and our highly selective KAT6A degrader program. Both programs target clinically validated mechanisms in disease areas of significant unmet need for patients with clear paths to differentiation in early clinical development."
Key Pipeline Programs
Mutant selective JAK2V617F JH2 inhibitor program
JAK2V617F is the primary driver mutation responsible for disease progression in the majority of patients living with myeloproliferative neoplasms (MPNs). The mutation impacts approximately 95% of patients with polycythemia vera (PV), 60% of patients with essential thrombocythemia (ET) and 55% of patients with myelofibrosis (MF). Identifying JAK2 JH2 inhibitors that selectively target V617F+ cells has long been a shared goal and challenge for industry. Prelude has discovered novel allosteric inhibitors that bind into the JAK2 JH2 "deep pocket" where the V617F mutation resides. These candidates demonstrate mutant specific inhibition in multiple preclinical models of MPNs. Prelude believes this approach may have the potential to reduce mutant allele burden, slow or even reverse disease progression, and transform treatment outcomes for MPN patients.
The Company has advanced the lead candidate from this program into IND-enabling studies and expects to file an IND and advance into clinical trials in the first half of 2026. The first disclosure of preclinical data from this program has been accepted for oral presentation at the American Society of Hematology (ASH) (Free ASH Whitepaper) 67th Annual Meeting taking place in Orlando, FL December 6-9, 2025. The abstract can be found on the ASH (Free ASH Whitepaper) 2025 website ASH (Free ASH Whitepaper) Annual Meeting & Exposition – Hematology.org.
The JAK2V617F inhibitor program is subject to an exclusive option agreement with Incyte announced in November 2025.
Highly selective KAT6A oral degrader program
KAT6 is an emerging, clinically-validated target in the treatment of ER+ breast cancer. Prelude discovered and is developing first-in-class, highly potent, highly selective and orally bioavailable KAT6A selective degraders. Prelude believes that selectively degrading KAT6A has the potential for improved efficacy, tolerability and combinability with other agents relative to non-selective inhibitors of KAT6A/B. The Company recently presented preclinical data supporting this hypothesis at the AACR (Free AACR Whitepaper) Annual Meeting 2025. The presentation can be found at Publications – Prelude Therapeutics.
The Company has selected a development candidate and is on track to file an IND in mid-2026 and initiate a phase 1 dose escalation study in the second half of 2026.
Degrader payloads for next generation DACs
Prelude is leveraging our expertise in targeted protein degradation to discover and develop novel degrader payloads for use with next generation DACs. We have developed highly potent SMARCA2/4 and CDK9 degrader payloads optimized for efficacy, tolerability and developability when coupled to a wide range of different antibodies.
The Company has amended and expanded the scope of our existing DAC collaboration with AbCellera Biologics. This enables AbCellera to use our degrader payloads on additional undisclosed antibody targets of interest and also enables Prelude to utilize our degrader payloads in licensing arrangements with other potential partners. The Company’s payloads and corresponding payload-linkers are available for licensing to partners to expand the reach of this new technology.
We have recently published preclinical data demonstrating that next generation DACs using Prelude degrader payloads have potential for significantly better in vivo efficacy and tolerability compared to traditional cytotoxic ADCs when tested head-to-head in xenograft models. These data can be found at: Publications – Prelude Therapeutics
Mutated calreticulin (mCALR) DAC discovery program
Mutant CALR is a neoantigen presented on the cell surface of malignant myeloid cells but not normal cells and is found in approximately 25-35% of patients with myelofibrosis (MF) and essential thrombocythemia (ET). Recently, a mCALR-targeted monoclonal antibody demonstrated robust clinical activity in high-risk ET patients. Prelude is exploring mCALR-targeted DACs using the Company’s proprietary degrader payloads as a differentiated approach for patients with CALR mutations. This early discovery program is wholly owned and controlled by Prelude.
The Company presented the first preclinical data from the program at the European Hematology Association (EHA) (Free EHA Whitepaper) 2025 Congress in June. The presentation can be found at Publications – Prelude Therapeutics. Updated preclinical data from this program has been accepted for oral presentation at the American Society of Hematology (ASH) (Free ASH Whitepaper) 67th Annual Meeting taking place in Orlando, FL December 6-9, 2025. The abstract can be found on the ASH (Free ASH Whitepaper) 2025 website ASH (Free ASH Whitepaper) Annual Meeting & Exposition – Hematology.org.
Third Quarter 2025 Financial Results
Cash, Cash Equivalents, Restricted Cash and Marketable Securities:
At September 30, 2025, the Company had cash, cash equivalents, restricted cash and marketable securities totaling $58.2 million. Subsequent to September 30, 2025, the Company received an additional license payment from its expanded collaborative agreement with AbCellera in October 2025 and $60 million from Incyte in November 2025. Based on preliminary estimates, the Company anticipates that its existing cash, cash equivalents, restricted cash and marketable securities will fund Prelude’s operations into 2027.
Research and Development (R&D) Expenses:
For the third quarter of 2025, R&D expense decreased to $21.7 million from $29.5 million for the prior year period. Included in the R&D expense for the three months ended September 30, 2025 was $1.4 million of non-cash expense related to stock-based compensation, including employee stock options, compared to $3.4 million for the three months ended September 30, 2024. Along with the decrease in stock-based compensation expense, research and development expenses decreased due to a decrease in expense related to our SMARCA2 clinical trials. Research and development expenses may fluctuate from period to period depending upon the stage of certain projects and the level of preclinical and clinical trial-related activities.
General and Administrative (G&A) Expenses:
For the third quarter of 2025, G&A expenses decreased to $5.2 million from $7.7 million for the prior year period. Included in general and administrative expenses for the three months ended September 30, 2025, was $1.0 million of non-cash expense related to stock-based compensation, including employee stock options, compared to $2.5 million for the three months ended September 30, 2024. The decrease in general and administrative expenses was primarily due to a decrease in stock-based compensation due to lower valuation on more recent grants due to the decrease in our stock price.
Net Loss:
For the three months ended September 30, 2025, net loss was $19.7 million, or $0.26 per share compared to $32.3 million, or $0.43 per share, for the prior year period. Included in the net loss for the three months ended September 30, 2025, was $2.4 million of non-cash expenses related to the impact of expensing share-based payments, including employee stock options, as compared to $5.9 million for the same period in 2024.
Conference Call and Webcast Information
Prelude Therapeutics management team will host a conference call, live webcast with slides and a Q&A on Wednesday, November 12, 2025 at 8:00 AM ET. A live webcast of the presentation will be available at Events & Presentations – Prelude Therapeutics (preludetx.com) A replay of the webcast will be available shortly after the conclusion of the call at Events & Presentations – Prelude Therapeutics (preludetx.com) and archived on the Company’s website for 60 days following the call.
(Press release, Prelude Therapeutics, NOV 12, 2025, View Source [SID1234659827])