Colleen Cousy's questions to Mersana Therapeutics Inc (MRSN) leadership • Q2 2025
Question
An analyst on behalf of Colleen Cousy at Baird asked about the enrollment rate for EMILY compared to internal expectations and also inquired about the enrollment progress for the HER2-targeting ADC, XMT-2056.
Answer
President and CEO Dr. Martin Huber expressed that EMILY enrollment is progressing 'very well' for a biomarker-selected study and that no additional sites are needed for the expansion phase. For XMT-2056, he pointed to the recent $15 million development milestone from GSK as evidence that enrollment has picked up and the program is 'chugging along,' while reiterating that the company is not committing to sharing dose-escalation data this year.