Merck & Co. Inc. announced that new data from its hematology pipeline will be presented at the American Society of Hematology $(ASH)$ Annual Meeting and Exposition in December 2025. The company will share results from multiple investigational therapies, including the first clinical presentation of MK-1045, a novel CD19xCD3 T-cell engager, in adults with relapsed or refractory B-cell acute lymphoblastic leukemia. Additionally, Merck will present initial results from the Phase 2 Shorespan-004 study of bomedemstat (MK-3543), an LSD1 inhibitor, in patients with polycythemia vera who are resistant or intolerant to cytoreductive therapy. Updated data on nemtabrutinib (MK-1026), a non-covalent BTK inhibitor, and zilovertamab vedotin (MK-2140), an antibody-drug conjugate targeting ROR1, are also scheduled for presentation. The results have not yet been presented and will be disclosed at the ASH 2025 meeting.