Inhibrx Announces Participation in Upcoming Scientific Conferences

, / PRNewswire / -- Inhibrx Biosciences, Inc. (Nasdaq: INBX) ("Inhibrx" or the "Company"), a clinical-stage biopharmaceutical company focused on developing a broad pipeline of novel biologic therapeutic candidates, today announced it will be presenting at the following upcoming scientific conferences:

2026 European Society for Medical Oncology (ESMO) Congress October 25 th , 2026 – Madrid, Spain

Title: HexAgon-HN: a phase 2/3 study of the hexavalent OX40 agonist ordastobart (INBRX-106) in combination with pembrolizumab as first-line treatment (1L tx) of PD-L1–high recurrent/metastatic head and neck squamous cell carcinoma (R/M HNSCC)—phase 2 primary analysis Format: Oral Presentation Lead Author: Jong Chul Park Date and Time: Sunday, October 25 th , 2026; 8:30-10:00 AM CET

2026 Musculoskeletal Tumor Society (MSTS) Annual Meeting October 29 th , 2026 – Miami, Florida

Title: The Tetravalent Death Receptor 5 (DR5) Agonist Ozekibart (INBRX-109) in Conventional Chondrosarcoma: Secondary Efficacy Endpoints from the Randomized, Registrational, Phase 2 ChonDRAgon study Format: Oral Presentation Lead Author: Robin Jones Date and Time: Thursday, October 29 th , 2026; 2:50-3:40 PM EST

2026 Connective Tissue Oncology Society (CTOS) Annual Meeting November 19 th – 20 th , 2026 – Seoul, South Korea

Title: Tetravalent Death Receptor 5 Agonist Ozekibart (INBRX-109) in Conventional Chondrosarcoma: Subgroup Analysis and Updated Progression-Free Survival (PFS) from the Randomized, Phase 2 ChonDRAgon Study Lead Author: Sant Chawla Format: Oral Presentation Date and Time: Friday, November 20 th , 2026; 11:00 AM-12:30 PM KST

Title: Phase 1/2 Study of the Tetravalent Death Receptor 5 (DR5) Agonist Ozekibart (INBRX-109) Combined with Irinotecan (I) and Temozolomide (T) in Adolescents and Adults with Ewing Sarcoma (EWS) Lead Author: Varun Monga Format: Poster Presentation Date and Time: Thursday, November 19 th , 2026; 5:30-6:30 PM KST

The presentations and poster will be accessible through a link on the investors' section of Inhibrx's website at https://inhibrxbiosciences.investorroom.com/events-and-presentations , upon commencement of each event.

About Inhibrx Biosciences, Inc.

Inhibrx Biosciences is a clinical-stage biopharmaceutical company focused on developing a broad pipeline of novel biologic therapeutic candidates. Inhibrx Biosciences utilizes diverse methods of protein engineering to address the specific requirements of complex target and disease biology, including its proprietary protein engineering platforms. Inhibrx Biosciences was incorporated in January 2024 as a direct, wholly-owned subsidiary of Inhibrx, Inc. Prior to the sale of Inhibrx, Inc. and the INBRX-101 program to Sanofi S.A., Inhibrx Biosciences acquired certain corporate infrastructure and other assets and liabilities through a series of internal restructuring transactions effected by Inhibrx, Inc. Inhibrx, Inc. also completed a distribution to holders of its shares of common stock of 92% of the issued and outstanding shares of Inhibrx Biosciences. Following such transactions, Inhibrx Biosciences' current clinical pipeline of therapeutic candidates includes ozekibart (INBRX-109) and ordastobart (INBRX-106), both of which utilize multivalent formats where the precise valency can be optimized in a target-centric way to mediate what we believe to be the most appropriate agonist function. For more information, please visit www.inhibrx.com .

Investor and Media Contact:

Kelly Deck, CFO ir@inhibrx.com 858-795-4260

SOURCE Inhibrx Biosciences, Inc.