Prothena(PRTA) - 2025 Q4 - Earnings Call Transcript

Financial Data and Key Metrics Changes - In 2025, Prothena reported a net cash used in operating and investing activities of $163.7 million, which was favorable compared to the guidance range of $170 million to $178 million [37] - The net loss for 2025 was $244.1 million, aligning with the guidance range of $240 million to $248 million [37] - As of December 31, 2025, Prothena had $308.4 million in cash, cash equivalents, and restricted cash, exceeding the guidance of $298 million [38] Business Line Data and Key Metrics Changes - Prothena's clinical pipeline saw significant progress, with two partnered programs, prasinezumab and coramitug, advancing into phase 3 clinical trials [6][7] - The phase 2 clinical trial for BMS-986446 in early Alzheimer's disease was fully enrolled in 2025, with completion expected in the first half of 2027 [8] - The company introduced its CYTOPE technology, demonstrating potential for precise targeting of intracellular disease pathways [9][30] Market Data and Key Metrics Changes - The phase 3 PARAISO trial for prasinezumab is expected to enroll approximately 900 participants, with primary completion anticipated in 2029 [16] - The phase 3 CLEOPATTRA trial for coramitug is intended to enroll about 1,280 ATTR-CM patients, with primary completion also expected in 2029 [23] - Prothena's partnered clinical programs have the potential to deliver up to approximately $3 billion in future milestone payments [12] Company Strategy and Development Direction - Prothena aims to capture value from clinical partnerships, with potential clinical milestone payments of up to $105 million in 2026 [10][40] - The company plans to implement a share redemption program and invest in its preclinical portfolio to support ongoing partnering efforts [40] - Prothena is focused on advancing its knowledge of the preclinical portfolio to explore research collaborations and licensing agreements [11] Management's Comments on Operating Environment and Future Outlook - Management expressed confidence in the robust pipeline addressing significant unmet needs for millions of patients [40] - The company highlighted the importance of upcoming milestones and the potential for significant medical advances in areas with high unmet needs [45] - Prothena remains well-capitalized with a strong cash position, focusing on delivering long-term shareholder value [41] Other Important Information - Prothena's collaborations with Bristol Myers Squibb progressed, with BMS-986446 receiving Fast Track designation from the U.S. FDA for Alzheimer's treatment [8] - The company is engaged in research collaborations exploring multiple approaches for applying its CYTOPE technology [11] Q&A Session Summary Question: Key milestones for partnered program trials for PARAISO and CLEOPATTRA - Management outlined expectations for sharing more information on CYTOPE activities and data from the tau program with Bristol Myers Squibb in 2027, along with the phase 3 readouts expected in 2029 for coramitug and prasinezumab [42][44] Question: Keeping the amyloid beta story alive against competitors - Management discussed the advantages of the PRX012 transferrin-based approach, emphasizing its potential for improved amyloid removal and reduced ARIA rates compared to competitors [51][55] Question: Data sharing from the phase one study of PRX019 - Management confirmed that data from the PRX019 study will be shared with Bristol Myers Squibb, who holds global rights to the program [62][68] Question: Data necessary to secure a partnership for the CYTOPE platform - Management highlighted the importance of demonstrating robust CNS activity and specificity in targeting TDP-43 aggregates, which could facilitate partnerships [71][75]