MBRX MOLECULIN BIOTECH INC.

Moleculin to Participate in the Virtual Investor Closing Bell Series

Moleculin to Participate in the Virtual Investor Closing Bell Series

Live video webcast with Walter Klemp, Chairman and Chief Executive Officer, on Tuesday, December 2nd at 4:00 PM ET

HOUSTON, Nov. 26, 2025 (GLOBE NEWSWIRE) -- Moleculin Biotech, Inc., (Nasdaq: MBRX) (“Moleculin” or the “Company”), a late-stage pharmaceutical company with a broad portfolio of drug candidates targeting hard-to-treat tumors and viruses, today announced that of Moleculin will participate in the on Tuesday, December 2, 2025 at 4:00 PM ET.

As part of the event, Mr. Klemp will provide a corporate overview and business outlook. In addition to the prepared remarks, interested parties will have the opportunity to submit questions live during the event. Mr. Klemp will answer as many questions as possible in the time allowed.

A of the event will be available on the  page under the  section of the Company’s website (). A webcast replay will be available two hours following the live event and will be accessible for 90 days.

About Moleculin Biotech, Inc.

Moleculin Biotech, Inc. is a Phase 3 clinical stage pharmaceutical company advancing a pipeline of therapeutic candidates addressing hard-to-treat tumors and viruses. The Company’s lead program, Annamycin, is a next-generation highly efficacious and well tolerated anthracycline designed to avoid multidrug resistance mechanisms and to lack the cardiotoxicity common with currently prescribed anthracyclines. Annamycin is currently in development for the treatment of relapsed or refractory acute myeloid leukemia (AML) and soft tissue sarcoma (STS) lung metastases.



The Company has begun the MIRACLE (Moleculin R/R AML AnnAraC Clinical Evaluation) Trial (MB-108), a pivotal, adaptive design Phase 3 trial evaluating Annamycin in combination with cytarabine, together referred to as AnnAraC, for the treatment of relapsed or refractory acute myeloid leukemia. Following a successful Phase 1B/2 study (MB-106), with input from the FDA, the Company believes it has substantially de-risked the development pathway towards a potential approval for Annamycin for the treatment of AML. This study remains subject to appropriate future filings with potential additional feedback from the FDA and their foreign equivalents.



Additionally, the Company is developing WP1066, an Immune/Transcription Modulator capable of inhibiting p-STAT3 and other oncogenic transcription factors while also stimulating a natural immune response, targeting brain tumors, pancreatic and other cancers. Moleculin is also engaged in the development of a portfolio of antimetabolites, including WP1122 for the potential treatment of pathogenic viruses, as well as certain cancer indications.

For more information about the Company, please visit and connect on , and .

Investor Contact:

JTC Team, LLC

Jenene Thomas

(908) 824-0775



EN
26/11/2025

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