GTx and Oncternal Therapeutics Enter into Definitive Merger Agreement

GTx, Inc. and Oncternal Therapeutics, Inc. jointly announced that they have entered into a definitive merger agreement under which the stockholders of Oncternal would become the majority owners of GTx’s outstanding common stock. The proposed merger will create a publicly-traded, clinical-stage oncology company.

The combined company will be named Oncternal Therapeutics, Inc. and plans to change its ticker symbol on the Nasdaq Capital Market to ONCT upon closing of the transaction.

The combined company will have a strong balance sheet and deep pipeline of promising oncology drug programs advancing in development:

• Oncternal’s lead program, cirmtuzumab, is an investigational, potential first-in-class anti-ROR1 monoclonal antibody. Cirmtuzumab is currently in a Phase 1/ 2 clinical trial in combination with ibrutinib for the treatment of chronic lymphocytic leukemia (CLL) and mantle cell lymphoma (MCL). In addition, an investigator-initiated Phase 1 clinical trial of cirmtuzumab in combination with paclitaxel for women with metastatic breast cancer is being conducted at the University of California San Diego (UC San Diego).
• TK216, an investigational, potential first-in-class small molecule designed to inhibit the biological activity of ETS-family transcription factor oncoproteins, is being evaluated alone and in combination with vincristine in a Phase 1 clinical trial in patients with relapsed or refractory Ewing sarcoma.
• A ROR-1 targeted chimeric antigen receptor T-cell (CAR-T) program is in preclinical development at UC San Diego for hematologic and solid tumors.
• A Selective Androgen Receptor Degrader (SARD) program, an investigational, potential first-in-class preclinical program designed for oral administration to treat castration-resistant prostate cancer in men who are non-responsive to current androgen targeted therapies.

Cash, cash equivalents and short-term investments for the combined company are expected to be approximately $26 million, if the merger closes by the end of the second quarter of 2019. These funds are expected to be sufficient to advance Oncternal’s programs into the second quarter of 2020, including the Phase 2 study of cirmtuzumab and ibrutinib, and will fund the planned SARD preclinical studies to support the submission of an investigational new drug application with the U.S. Food and Drug Administration.

James Breitmeyer, MD, PhD, cofounder, president and CEO of Oncternal and a 30-year veteran of the pharmaceutical industry, will continue as president and CEO of the combined company. David Hale, cofounder of Oncternal and a 35-year veteran of numerous successful private and public biotech companies, will continue as Chairman of the Board of the combined company.

“This merger introduces Oncternal and its promising oncology pipeline to the public market and provides additional capital resources to advance our programs to potential value inflection points,” said Dr. Breitmeyer. “In addition to clinical data expected from our cirmtuzumab and TK216 programs later this year and during the first half of 2020, we also plan to have preclinical results that get us ready for clinical testing of our ROR1 CAR-T program. The addition of GTx’s SARD technology strengthens our pipeline and augments our entire oncology franchise, which includes a range of therapeutic approaches for a variety of difficult to treat cancers.”

“This transaction with Oncternal reflects the continued commitment of our management team and Board of Directors to deliver value to stockholders and make a difference in patients’ lives,” said Robert J. Wills, PhD, Executive Chairman of GTx. “Following a thorough review of strategic alternatives, we have determined that a reverse merger with Oncternal will enable GTx investors to participate in Oncternal’s broader pipeline of oncology opportunities, including product candidates designed to address rare disease indications, and enable the continued development of our first-in-class SARD technology by a company whose leadership has deep experience in developing oncology medicines.”