0001643615 2026-08-05 2026-08-05 --12-31 true 0001643615 8-K/A 2026-08-05 Onterris, Inc. DE 001-39394 46-4195044 5120 Northshore Drive North Little Rock AR 72118 501 900-6400 false false false false Common Stock, $0.000004 par value per share ONT NYSE false This Amendment No. 1 on Form 8-K/A amends and restates in its entirety the Current Report on Form 8-K filed by Onterris, Inc. (the “Company”) on August 5, 2026 (Accession #0001193125-26-335121) (the “Original 8-K”). The Original 8-K is being amended solely to remove Item 8.01 and Exhibit 99.1 which was inadvertently included in the Original 8-K. No other changes are being made to the Original 8-K.