- CID-103 is a potential best-in-class, anti-CD38 monoclonal antibody
- Phase 1 dose escalation study in Immune Thrombocytopenia (ITP) results and update

SOUTH SAN FRANCISCO, CA / ACCESS Newswire / November 3, 2025 / CASI Pharmaceuticals, Inc. (NASDAQ: CASI), a clinical-stage biopharmaceutical company developing CID-103, a potential best-in-class, clinical stage anti-CD38 monoclonal antibody, for patients with organ transplant rejection and autoimmune diseases, today announced that data will be presented from its Phase 1 open-label study of CID-103 in adult patients with immune thrombocytopenia (ITP) at the 67th American Society of Hematology Annual Meeting and Exposition being held December 6-9, 2025, in Orlando, Florida.

Poster Presentation Details

Title: A dose-escalation and safety study of CID-103 followed by a randomized, open-label, parallel-arm multi-dose study evaluating the efficacy and tolerability of CID-103 in adults with persistent or chronic immune thrombocytopenia

Authors: Chen Yunfei, ZePing Zhou, Hu Zhou, Ruibin Huang, Zhenyu Yan, Jun Peng, Ming Hou, James Bussel, Alexander Zukiwski, Junping Chen, Lei Zhang

Session Name: 311. Disorders of Platelet Number or Function: Clinical and Epidemiological: Poster II

Session Date and Time: Sunday, December 7, 2025, 6:00 p.m. - 8:00 p.m. PT

Location: Orange County Convention Center - West Halls B3-B4

About Phase 1 Dose-Escalating Study

In this multicenter, randomized, open-label, Phase 1 study, an estimated maximum of approximately 30 adults between 18 and 65 with primary ITP who had received at least two previous lines of treatment and whose mean platelet count was ≤ 35 x 10⁹/L on at least two measurements at least one week apart were enrolled. This dose escalation study incorporated both accelerated escalation and standard 3+3 design. Patients were assigned to sequential dose cohorts of CID-103 at 30 mg, 150 mg, 300 mg, 600 mg, and 900 mg, with a priming dose of CID-103, of either 30 mg or 150 mg administered prior to the cohort dose. The Phase 1 study is designed to include multiple adaptative elements such as testing of intermediate, lower and higher doses if determined to be appropriate by the Safety Monitoring Committee (SMC).

This study is conducted under an FDA approved IND and a Clinical Trial Application (CTA) approved by the Chinese Center for Drug Evaluation (CDE).

About CASI Pharmaceuticals

CASI Pharmaceuticals, Inc. is a public biopharmaceutical company developing CID-103, an anti-CD38 monoclonal antibody for organ transplant rejection and autoimmune diseases.

CID-103 is a fully human IgG1, potentially best-in-class, clinical stage, anti-CD38 monoclonal antibody which targets a unique epitope and has demonstrated an encouraging pre-clinical efficacy and clinical safety profile compared to other anti-CD38 monoclonal antibodies, and for which CASI owns exclusive global rights. CASI received FDA IND clearance to conduct a Phase 1 study in renal allograft antibody-mediated rejection (AMR) in the U.S. and plans for first patient in first quarter of 2026. In parallel, CASI is actively recruiting and dosing patients in an ongoing Phase 1 study in immune thrombocytopenia (ITP). In addition, CASI is assessing multiple technologies for development of a stable, high concentration protein solution for subcutaneous formulation.

More information on CASI is available at www.casipharmaceuticals.com.

Forward Looking Statements

This announcement contains forward-looking statements. These statements are made under the "safe harbor" provisions of the U.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements can be identified by terminology such as "will," "expects," "anticipates," "future," "intends," "plans," "believes," "estimates," "confident" and similar statements. Among other things, the business outlook and quotations from management in this announcement, as well as the Company's strategic and operational plans, contain forward-looking statements. The Company may also make written or oral forward-looking statements in its periodic reports to the U.S. Securities and Exchange Commission (the "SEC"), in its annual report to shareholders, in press releases and other written materials and in oral statements made by its officers, directors or employees to third parties. Statements that are not historical facts, including statements about the Company's beliefs and expectations, are forward-looking statements. Forward-looking statements involve inherent risks and uncertainties. A number of factors could cause actual results to differ materially from those contained in any forward-looking statement, including but not limited to the following: uncertainties related to the possibility that the transaction for the divestiture of certain assets in China (the "Transaction") will not occur as planned if events arise that result in the termination of the Equity and Assets Transfer Agreement, or if one or more of the various closing conditions to the Transaction are not satisfied or waived; the possibility that our plan with respect to our business operations after the consummation of the Transaction can be implemented successfully; our recurring operating losses have raised substantial doubt regarding our ability to continue as a going concern; the possibility that we may be delisted from trading on The Nasdaq Capital Market if we fail to satisfy applicable continued listing standards; the volatility in the market price of our ordinary shares; the risk of substantial dilution of existing shareholders in future share issuances; the difficulty of executing our business strategy on a global basis including China; our inability to enter into strategic partnerships for the development, commercialization, manufacturing and distribution of our proposed product candidates or future candidates; legal or regulatory developments in China that adversely affect our ability to operate in China; our lack of experience in manufacturing products and uncertainty about our resources and capabilities to do so on a clinical or commercial scale; risks relating to the commercialization, if any, of our products and proposed products (such as marketing, safety, regulatory, patent, product liability, supply, competition and other risks); our inability to predict when or if our product candidates will be approved for marketing by the U.S. Food and Drug Administration, European Medicines Agency, PRC National Medical Products Administration, or other regulatory authorities; our inability to receive approval for renewal of license of our existing products; the risks relating to the need for additional capital and the uncertainty of securing additional funding on favorable terms; the risks associated with our product candidates, and the risks associated with our other early-stage products under development; the risk that result in preclinical and clinical models are not necessarily indicative of clinical results; uncertainties relating to preclinical and clinical trials, including delays to the commencement of such trials; our ability to protect our intellectual property rights; the lack of success in the clinical development of any of our products; and our dependence on third parties; the risks related to our dependence on Juventas to conduct the clinical development of CNCT19 and to partner with us to co-market CNCT19; risks related to our dependence on Juventas to ensure the patent protection and prosecution for CNCT19; the risk related to the Company's ongoing development of and regulatory application for CID-103 with respect to the treatment of antibody-mediated rejection for organ transplant and the license arrangements of CID-103; risks relating to interests of our largest shareholder and our Chairman that differ from our other shareholders; risks related to the development of a new manufacturing facility by CASI Pharmaceuticals (Wuxi) Co., Ltd. and risks related to our disagreement with Acrotech with respect to the termination of agreements regarding EVOMELA^®. Further information regarding these and other risks is included in the Company's filings with the SEC. All information provided herein is as of the date of this announcement, and the Company undertakes no obligation to update any forward-looking statement, except as required under applicable law. We caution readers not to place undue reliance on any forward-looking statements contained herein.

EVOMELA^® is proprietary to Acrotech Biopharma Inc. and its affiliates. FOLOTYN^® is proprietary to Acrotech Biopharma Inc and its affiliates. The Company is currently involved in disputes and legal proceedings related to certain pipeline products, including EVOMELA^® and CNCT-19.Please refer to the Company's earlier SEC filing for further information.

COMPANY CONTACT:

Ingrid Choong, PhD
650-619-6115
ingridc@casipharmaceuticals.com

SOURCE: CASI Pharmaceuticals