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Precision Oncology Through Synthetic Lethality Transforming DDR Inhibition into Patient Benefit September 2025 2 © 2025 Aprea Therapeutics, Inc. All Rights Reserved Forward-Looking Statements Certain information con

Key Takeaway: Tranche B warrants to purchase up to 1,097,394 shares of common stock at a cash exercise price of $9.1125 per share for an aggregate of up to $10.0 million and will expire at the earlier of (i) 30 days following the announcement of the RP2D for the Company's WEE1 inhibitor progra

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Tranche B warrants to purchase up to 1,097,394 shares of common stock at a cash exercise price of $9.1125 per share for an aggregate of up to $10.0 million and will expire at the earlier of (i) 30 days following the announcement of the RP2D for the Company's WEE1 inhibitor program, APR-1051, and the daily VWAP of the Company's common stock equaling or exceeding $18.225 per share for 30 consecutive trading days following the announcement and (ii) five years from the date of issuance 1. 400,000,000 common shares authorized 21 2025 Aprea Therapeutics, Inc.
Patent 10,301,324 Family 3: ATR Inhibitor Pharmaceutical Composition and Methods - International application filed on Apr. 14th, 2023 - Pharmaceutical formulation and composition of our lead molecule in the clinic - Nationalizations pending for US, AU, BR, CA, CN, EA, EP, IL, IN, JP, KR, MX, NZ, PH, SG, ZA Family 4: WEE1 Inhibitor Pharmaceutical Compositions and Methods - International Application filed on Jun. 3rd, 2022 - Composition of our lead WEE1 inhibitor compounds - Nationalizations in US, AU, BR, CA, CN, EP, IL, IN, JP, KR, MX, ZA Family 5: Methods of Treating Cancer - U.S.
Patent 9,663,535 - 1.2: Issued on May 29, 2018 as U.S. Patent 9,981,989 - 1.3: Issued on Feb. 5, 2019 as U.S. Patent 10,196,405 Family 2: ATR Inhibitors and Methods of Use - Carboxylic acid-containing macrocyclic ATR inhibitors, and prodrugs; methods of using these inhibitors to treat various cancers; filed on Apr. 12th, 2017 - Issued on May 28th , 2019 as U.S.
Patient continues on treatment with manageable toxicity profile Human Papillomavirus (HPV) Head and Neck Squamous Cell Carcinoma (HNSCC) Pre-clinical studies with APR-1051 Collaboration with MD Anderson APR-1051 shows single agent activity in HPV+ head and neck tumor cells APR-1051 shows single agent activity in head and neck tumor cells 12 2025 Aprea Therapeutics, Inc.
Securities and Exchange Commission. For all these reasons, actual results and developments could be materially different from those expressed in or implied by our forward-looking statements. You are cautioned not to place undue reliance on these forward-looking statements, which are made only as of the date of this presentation. We undertake no obligation to update such forward-looking statements for any reason, except as required by law. 3 2025 Aprea Therapeutics, Inc.
Any or all of the forward-looking statements may turn out to be wrong or be affected by inaccurate assumptions we might make or by known or unknown risks and uncertainties. These forward-looking statements are subject to risks and uncertainties including, without limitation, risks related to the success, timing, and cost of our ongoing clinical trials and anticipated clinical trials for our current product candidates, including statements regarding the timing of initiation, pace of enrollment and completion of the trials (including our ability to fully fund our disclosed clinical trials, which assumes no material changes to our currently projected expenses), futility analyses, presentations at conferences and data reported in an abstract, and receipt of interim or preliminary results (including, without limitation, any preclinical results or data), which are not necessarily indicative of the final results of our ongoing clinical trials, our understanding of product candidates mechanisms of action and interpretation of preclinical and early clinical results from its clinical development programs, our ability to continue as a going concern, and the other risks, uncertainties, and other factors described under Risk Factors, Management's Discussion and Analysis of Financial Condition and Results of Operations and elsewhere in the documents we file with the U.S.
All statements contained in this presentation other than statements of historical fact are forward-looking statements, including statements regarding our ability to develop, commercialize, and achieve market acceptance of our current and planned products and services, our research and development efforts, including timing considerations and other matters regarding our business strategies, use of capital, results of operations and financial position, and plans and objectives for future operations.
We may, in some cases use terms such as future, predicts, believes, potential, continue, anticipates, estimates, expects, plans, intends, targeting, confidence, may, could, might, likely, will, should or other words that convey uncertainty of the future events or outcomes to identify these forward-looking statements. Our forward-looking statements are based on current beliefs and expectations of our management team and on information currently available to management that involve risks, potential changes in circumstances, assumptions, and uncertainties.
Last updated: Sep 8, 2025