ImmunoGen to Receive $34 Million¹ in Upfront and Near-Term Milestone Payments and is Eligible to Receive Potential Regulatory and Commercial Milestone Payments as well as Double-Digit Royalties

Collaboration Further Supports Strategy to Bring ELAHERE to Eligible Patients with Folate Receptor Alpha (FRα)-Positive, Platinum-Resistant Ovarian Cancer Globally

"As a leader in the development and commercialization of novel products in oncology for more than two decades and with a deep heritage and presence in Japan, Takeda is the ideal partner to help us deliver ELAHERE to eligible patients in this important market," said Mark Enyedy, ImmunoGen's President and Chief Executive Officer. "Building upon our strong commercial launch in the US, this partnership reinforces the continued excitement around ELAHERE's practice-changing potential and our commitment to bringing this biomarker-directed ADC to patients globally."

Under the terms of the collaboration and license agreement, ImmunoGen will receive a one-time, upfront payment and an additional payment upon conversion of US Food and Drug Administration (FDA) accelerated approval of ELAHERE in platinum-resistant ovarian cancer (PROC) to full approval. The Company is eligible to receive additional payments if Takeda achieves prespecified regulatory and commercial milestones, as well as double-digit royalties on future net sales of ELAHERE in Japan. Per the agreement, ImmunoGen has retained exclusive production rights and will supply product for development and commercial use in Japan. In exchange, Takeda will receive an exclusive license to develop and commercialize ELAHERE in Japan and is responsible for all regulatory filings and obligations.

“We are pleased to bring ELAHERE to Japan, where there is a significant unmet need for patients with ovarian cancer, particularly for those whose disease has become resistant to platinum-based treatments,” said Teresa Bitetti, President of the Global Oncology Business Unit at Takeda. “The data from the Phase 3 MIRASOL study demonstrate the potential for ELAHERE to become the new standard of care for this devastating disease, and we are confident this collaboration with ImmunoGen will bring significant value to patients in Japan. This investment is reflective of Takeda’s commitment to partnering with organizations that share our passion for developing new medicines for cancers with limited or ineffective treatment options and brings us one step closer to achieving our aspiration to cure cancer.”

¹ ¥5 billion (0.0068 exchange rate as of August 25, 2023)