Loxo Oncology & Bayer Form Development Partnership for Larotrectinib and LOXO-195

Loxo Oncology, a biopharmaceutical company innovating the development of highly selective medicines for patients with genetically defined cancers, announced that it has entered into a global collaboration with Bayer to develop and commercialize larotrectinib and LOXO-195, Loxo Oncology’s franchise of highly selective TRK inhibitors for patients with TRK fusion cancers.

Under the terms of the agreement, Loxo Oncology will receive a $400M upfront payment. Loxo Oncology is eligible for $450M in milestone payments upon larotrectinib regulatory approvals and first commercial sale events in certain major markets and an additional $200M in milestone payments upon LOXO-195 regulatory approvals and first commercial sale events in certain major markets.

“This is a transformational collaboration for the company as we prepare for commercialization,” said Jacob Van Naarden, chief business officer of Loxo Oncology. “Bayer has a history of successful co-promotion efforts with emerging biopharmaceutical companies and we are confident that their oncology team has the global reach and expertise, including an existing field force dedicated to cancer, to complement our existing commercial plans. We look forward to working with Bayer and believe that together we can bring our TRK inhibitors to more patients more quickly.”

“We see great potential in larotrectinib and moreover the follow-on compound LOXO-195 which may provide additional benefit for patients who might progress on an initial TRK inhibition therapy. These agents have the potential to fulfill the promise of precision medicine, where tumor genetics rather than tumor site of origin define the treatment approach for patients,” said Robert LaCaze, executive vice president and head of the Oncology Strategic Business Unit at Bayer.

Loxo Oncology will lead global development activities and United States (U.S.) regulatory activities. Bayer will lead ex-U.S. regulatory activities, and worldwide commercial activities. Globally, Loxo Oncology and Bayer will share development costs on a 50/50 basis. In the U.S., where Loxo Oncology and Bayer will co-promote the products, the parties will share commercial costs and profits on a 50/50 basis. Bayer will pay Loxo Oncology a $25Mmilestone upon achieving a certain U.S. net sales threshold. Outside of the U.S., where Bayer will commercialize, Bayer will pay Loxo Oncology tiered, double-digit royalties on net sales, and sales milestones totaling $475M. Bayer will book revenues worldwide.

Loxo Oncology was advised by Fenwick and West in the transaction.

About Larotrectinib (LOXO-101)
Larotrectinib is a potent, oral and selective investigational new drug in clinical development for the treatment of patients with cancers that harbor abnormalities involving the tropomyosin receptor kinases (TRKs). Growing research suggests that the NTRK genes, which encode for TRKs, can become abnormally fused to other genes, resulting in growth signals that can lead to cancer in many sites of the body. In an analysis of 55 RECIST-evaluable TRK fusion adult and pediatric patients, larotrectinib demonstrated a 75 percent independently-reviewed confirmed overall response rate (ORR) and an 80 percent investigator-assessed confirmed ORR, across many different types of solid tumors. Larotrectinib has been granted Breakthrough Therapy Designation, Rare Pediatric Disease Designation and Orphan Drug Designation by the U.S. FDA. For additional information about the larotrectinib clinical trials, please refer to www.clinicaltrials.gov.

About LOXO-195
LOXO-195 is a potent, oral and selective investigational new drug in clinical development for the treatment of patients with cancers that have acquired resistance to initial TRK therapy such as larotrectinib. Though drugs such as larotrectinib can induce durable responses in these patients, the cancer may eventually begin to grow again. This phenomenon is called “acquired resistance,” in that the cancer has acquired features conferring resistance to the initial therapy that was once effective. Emerging data in the field of TRK inhibition suggest that acquired resistance may emerge due to TRK kinase point mutations, such as those in the solvent front domain, xDFG domain, or gatekeeper region. LOXO-195 was designed to address these new point mutations and induce a new response in the patient’s cancer.

About TRK Fusion Cancer
TRK fusions are chromosomal abnormalities that occur when one of the NTRK genes (NTRK1, NTRK2, NTRK3) becomes abnormally connected to another, unrelated gene (e.g. ETV6, LMNA, TPM3). This abnormality results in uncontrolled TRK signaling that can lead to cancer. TRK fusions occur rarely but broadly in various adult and pediatric solid tumors, including appendiceal cancer, breast cancer, cholangiocarcinoma, colorectal cancer, GIST, infantile fibrosarcoma, lung cancer, mammary analogue secretory carcinoma of the salivary gland, melanoma, pancreatic cancer, thyroid cancer, and various sarcomas. TRK fusions can be identified through various diagnostic tests, including targeted next-generation sequencing (NGS), immunohistochemistry (IHC), polymerase chain reaction (PCR), and fluorescent in situ hybridization (FISH).