0001782107 2026-05-19 2026-05-19 false --12-31 0001782107 8-K 2026-05-19 Onconetix, Inc. DE 001-41294 83-2262816 201 E. Fifth Street Suite 1900 Cincinnati OH 45202 513 620-4101 false false false false Common Stock, par value $0.00001 per share ONCO NASDAQ true false