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Moleculin to Highlight its Ongoing Phase 3 Acute Myeloid Leukemia “MIRACLE” Clinical Trial at the 14th Annual Acute Leukemia Meeting

Key Takeaway: Moleculin Biotech, Inc. will present its ongoing Phase 3 MIRACLE trial at the 14th Annual Acute Leukemia Meeting. The trial evaluates Annamycin in combination with cytarabine for adult patients with relapsed or refractory acute myeloid leukemia. Annamycin has received FDA Fast Track Status and Orphan Drug Designation, indicating its potential in treating this challenging condition.

Market Sentiment Analysis

POSITIVE FACTORS

  • Moleculin's Annamycin shows promise in treating relapsed AML.
  • The ongoing MIRACLE trial has received FDA Fast Track Status.
  • The presentation at the Acute Leukemia Meeting highlights significant advancements.

CONCERNS & RISKS

  • Moleculin requires significant additional financing for clinical trials.
  • Future outcomes are uncertain and depend on securing timely financing.

Full Press Release Details

HOUSTON, Oct. 30, 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 cancers and viral infections, today announced it will present at the14thAnnual Acute Leukemia Meetingbeing held October 30-31, 2025 at the MD Anderson Cancer Center Spain Foundation in Madrid, Spain.
Details of the presentation are as follows:
Title:L-Annamycin - Non-Cardiotoxic Anthracycline; MIRACLE Pivotal AML StudySession:Lunch Session: MoleculinPresenter:Dr. Paul Waymack, Senior Chief Medical Officer of MoleculinDate and Time:Thursday, October 30that 2:35 PM CEST
As part of the presentation, Dr. Waymack will discuss the Company’s ongoing pivotal Phase 2B/3, multi-center, randomized, double-blind, placebo-controlled, adaptive design study of Annamycin in combination with cytarabine (also known as “Ara-C” and for which the combination of Annamycin and Ara-C is referred to as “AnnAraC”) for the treatment of adult patients with acute myeloid leukemia (AML) who are refractory to or relapsed (R/R) after induction therapy (R/R AML). This Phase 3 “MIRACLE” trial (derived fromMoleculinR/R AMLAnnAraCClinicalEvaluation) is a global approval trial, including sites in the US, Europe and the Middle East (clinicaltrials.govNCT06788756;euclinicaltrials.eu2024-518359-47-00).
Annamycin, also known by its non-proprietary name of naxtarubicin, currently has Fast Track Status and Orphan Drug Designation from the FDA for the treatment of relapsed or refractory AML, in addition to Orphan Drug Designation for the treatment of STS lung mets. Furthermore, Annamycin has Orphan Drug Designation for the treatment of relapsed or refractory AML from the EMA.
For more information about the 14thAnnual Acute Leukemia Meeting, please visit themeeting website.

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 (MoleculinR/R AMLAnnAraCClinicalEvaluation) 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 also has in its pipeline 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 visitwww.moleculin.comand connect onX,LinkedInandFacebook.
Forward-Looking StatementsSome of the statements in this release are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, Section 21E of the Securities Exchange Act of 1934 and the Private Securities Litigation Reform Act of 1995, which involve risks and uncertainties. Moleculin will require significant additional financing, for which the Company has no commitments, in order to conduct its clinical trials as described in this press release, and the milestones described in this press release assume the Company’s ability to secure such financing on a timely basis. Although Moleculin believes that the expectations reflected in such forward-looking statements are reasonable as of the date made, expectations may prove to have been materially different from the results expressed or implied by such forward-looking statements. Moleculin has attempted to identify forward-looking statements by terminology including ‘believes,’ ‘estimates,’ ‘anticipates,’ ‘expects,’ ‘plans,’ ‘projects,’ ‘intends,’ ‘potential,’ ‘may,’ ‘could,’ ‘might,’ ‘will,’ ‘should,’ ‘approximately’ or other words that convey uncertainty of future events or outcomes to identify these forward-looking statements. These statements are only predictions and involve known and unknown risks, uncertainties, and other factors, including those discussed under Item 1A. “Risk Factors” in our most recently filed Form 10-K filed with the Securities and Exchange Commission (SEC) and updated from time to time in our Form 10-Q filings and in our other public filings with the SEC. Any forward-looking statements contained in this release speak only as of its date. We undertake no obligation to update any forward-looking statements contained in this release to reflect events or circumstances occurring after its date or to reflect the occurrence of unanticipated events.

Investor Contact:JTC Team, LLCJenene Thomas(908) 824-0775MBRX@jtcir.com

Frequently Asked Questions

What is the MIRACLE trial?

The MIRACLE trial is a Phase 2B/3 study evaluating Annamycin with cytarabine for relapsed AML.

Where will the Acute Leukemia Meeting take place?

The meeting will be held at the MD Anderson Cancer Center Spain Foundation in Madrid.

What design does the MIRACLE trial follow?

The trial is a multi-center, randomized, double-blind, placebo-controlled study.

What designations has Annamycin received?

Annamycin has received FDA Fast Track Status and Orphan Drug Designation for AML.

Who is presenting at the Acute Leukemia Meeting?

Dr. Paul Waymack, Senior Chief Medical Officer of Moleculin, will present.

Last updated: Oct 30, 2025