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MAIA Biotechnology Accepted for Poster Presentation at American Society of Clinical Oncology (ASCO) 2025 Annual Meeting

1. MAIA's THIO-101 trial data accepted for ASCO 2025 poster presentation. 2. CEO claims ateganosine could challenge NSCLC treatment standards. 3. Poster focuses on overall survival with ateganosine in resistant NSCLC cases. 4. ASCO 2025 will feature over 5,000 presentations on cancer care advancements. 5. Ateganosine shows promise in enhancing immune responses in cancer treatment.

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Why Bullish?

Acceptance at ASCO is a positive indicator for future interest and validation in MAIA's treatment approach, similar to past cases where presentation success led to stock price increases.

How important is it?

ASCO presentations often lead to increased visibility, investor interest, and potential collaborations, impacting MAIA's valuation significantly.

Why Long Term?

The results shared at ASCO could attract investors and facilitate partnerships, with effects likely visible in the market in 6 months or more.

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CEMIPJNJBMY
CHICAGO--(BUSINESS WIRE)--MAIA Biotechnology, Inc. (NYSE American: MAIA), a clinical-stage biopharmaceutical company focused on developing targeted immunotherapies for cancer, today announced that an abstract about the efficacy data from the Phase 2 THIO-101 clinical trial was accepted for poster presentation at the 2025 Annual Meeting of the American Society of Clinical Oncology (ASCO), taking place May 30 to June 3, 2025, in Chicago, Illinois. The poster is scheduled for presentation on May 31, 2025, from 01:30pm to 04:30pm CDT in the Lung Cancer track. “We continue to believe that our telomere targeting agent ateganosine (THIO) could become a best-in-class anticancer treatment with the potential to challenge the standard of care for NSCLC,” said MAIA CEO Vlad Vitoc, M.D. “Treatment with ateganosine has shown excellent efficacy in third-line NSCLC to date and we look forward to presenting our findings at ASCO 2025 on May 31st.” Poster Presentation Details Poster title: “Phase 2 Study of Telomere-Targeting Agent THIO Sequenced With Cemiplimab in Third-Line Immune Checkpoint Inhibitor–Resistant Advanced NSCLC: Evaluation of Overall Survival” Session date and time: May 31, 2025, 01:30pm to 04:30pm CDT Presenter: Tomasz Jankowski, M.D. MAIA’s poster will be available on the Publications page of MAIA’s website on the day of the presentation. About ASCO 2025 The 2025 ASCO Annual Meeting will feature over 200 sessions and more than 5,000 posters complementing the theme, “Driving Knowledge to Action: Building a Better Future,” reflecting the meeting’s tradition of inspiring and advancing the oncology field with the power of the latest knowledge in cancer care. About Ateganosine Ateganosine (THIO, 6-thio-dG or 6-thio-2’-deoxyguanosine) is a first-in-class investigational telomere-targeting agent currently in clinical development to evaluate its activity in non-small cell lung cancer (NSCLC). Telomeres, along with the enzyme telomerase, play a fundamental role in the survival of cancer cells and their resistance to current therapies. The modified nucleotide 6-thio-2’-deoxyguanosine induces telomerase-dependent telomeric DNA modification, DNA damage responses, and selective cancer cell death. Ateganosine-damaged telomeric fragments accumulate in cytosolic micronuclei and activates both innate (cGAS/STING) and adaptive (T-cell) immune responses. The sequential treatment with ateganosine followed by PD-(L)1 inhibitors resulted in profound and persistent tumor regression in advanced, in vivo cancer models by induction of cancer type–specific immune memory. Ateganosine is presently developed as a second or later line of treatment for NSCLC for patients that have progressed beyond the standard-of-care regimen of existing checkpoint inhibitors. About THIO-101, a Phase 2 Clinical Trial THIO-101 is a multicenter, open-label, dose finding Phase 2 clinical trial. It is the first trial designed to evaluate ateganosine’s anti-tumor activity when followed by PD-(L)1 inhibition. The trial is testing the hypothesis that low doses of ateganosine administered prior to cemiplimab (Libtayo®) will enhance and prolong immune response in patients with advanced NSCLC who previously did not respond or developed resistance and progressed after first-line treatment regimen containing another checkpoint inhibitor. The trial design has two primary objectives: (1) to evaluate the safety and tolerability of ateganosine administered as an anticancer compound and a priming immune activator (2) to assess the clinical efficacy of ateganosine using overall response rate (ORR) as the primary clinical endpoint. The expansion of the study will assess ORR in advanced NSCLC patients receiving third line (3L) therapy who were resistant to previous checkpoint inhibitor treatments (CPI) and chemotherapy. Treatment with ateganosine followed by cemiplimab (Libtayo®) has been generally well-tolerated to date in a heavily pre-treated population. For more information on this Phase 2 trial, please visit ClinicalTrials.gov using the identifier NCT05208944. About MAIA Biotechnology, Inc. MAIA is a targeted therapy, immuno-oncology company focused on the development and commercialization of potential first-in-class drugs with novel mechanisms of action that are intended to meaningfully improve and extend the lives of people with cancer. Our lead program is ateganosine, a potential first-in-class cancer telomere targeting agent in clinical development for the treatment of NSCLC patients with telomerase-positive cancer cells. For more information, please visit www.maiabiotech.com. Forward Looking Statements MAIA cautions that all statements, other than statements of historical facts contained in this press release, are forward-looking statements. Forward-looking statements are subject to known and unknown risks, uncertainties, and other factors that may cause our or our industry’s actual results, levels or activity, performance or achievements to be materially different from those anticipated by such statements. The use of words such as “may,” “might,” “will,” “should,” “could,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “project,” “intend,” “future,” “potential,” or “continue,” and other similar expressions are intended to identify forward looking statements. However, the absence of these words does not mean that statements are not forward-looking. For example, all statements we make regarding (i) the initiation, timing, cost, progress and results of our preclinical and clinical studies and our research and development programs, (ii) our ability to advance product candidates into, and successfully complete, clinical studies, (iii) the timing or likelihood of regulatory filings and approvals, (iv) our ability to develop, manufacture and commercialize our product candidates and to improve the manufacturing process, (v) the rate and degree of market acceptance of our product candidates, (vi) the size and growth potential of the markets for our product candidates and our ability to serve those markets, and (vii) our expectations regarding our ability to obtain and maintain intellectual property protection for our product candidates, are forward looking. All forward-looking statements are based on current estimates, assumptions and expectations by our management that, although we believe to be reasonable, are inherently uncertain. Any forward-looking statement expressing an expectation or belief as to future events is expressed in good faith and believed to be reasonable at the time such forward-looking statement is made. However, these statements are not guarantees of future events and are subject to risks and uncertainties and other factors beyond our control that may cause actual results to differ materially from those expressed in any forward-looking statement. Any forward-looking statement speaks only as of the date on which it was made. We undertake no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by law. In this release, unless the context requires otherwise, “MAIA,” “Company,” “we,” “our,” and “us” refers to MAIA Biotechnology, Inc. and its subsidiaries. More News From MAIA Biotechnology, Inc.

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