Arno Therapeutics, Inc., headquartered in Flemington, New Jersey, operates as a biopharmaceutical enterprise focused on discovering and advancing treatments for cancer and other severe health conditions. The company's developmental portfolio includes several key compounds: Onapristone, a type 1 anti-progestin hormone blocker, is currently undergoing Phase I/II clinical trials. This therapeutic is being investigated for its efficacy in treating various solid tumors, such as breast and endometrial cancers in post-menopausal women, and advanced castration-resistant prostate cancer in men.