On November 13, 2025 Cellectar Biosciences, Inc. (NASDAQ: CLRB), a late-stage clinical biopharmaceutical company focused on the discovery and development of drugs for the treatment of cancer, reported financial results for the quarter ended September 30, 2025, and provided a corporate update.
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"Our productive engagement with the European Medicines Agency (EMA) highlighted by confirmation of eligibility to submit for a conditional marketing authorization marks a significant step forward in our global regulatory strategy, bringing us closer to potential approval and commercialization of iopofosine I-131 for WM in 2027. In parallel, additional data from the CLOVER WaM study and the receipt of breakthrough designation from the FDA continues to support a path toward a New Drug Application for accelerated approval," stated James Caruso, president and CEO of Cellectar. "We believe this regulatory pathway, combined with the compelling clinical results we’ve seen to date, reinforces the value of iopofosine and positions it as a highly attractive asset for collaboration or strategic partnership.
"Looking ahead, we are excited to further advance our promising radioconjugate pipeline of auger- and alpha-emitting drug candidates and have initiated a Phase 1b trial for CLR 125 in triple-negative breast cancer, which builds on strong preclinical data showing reduction or inhibition of solid tumor growth. We are also progressing our early-stage asset, CLR 225, which has shown robust anti-tumor activity in pancreatic cancer models, and has recently completed IND-enabling studies. Each of these achievements brings us closer to our goal of transforming the outlook for patients facing aggressive and life-threatening cancers," concluded Mr. Caruso.
Third Quarter and Subsequent Corporate Highlights
Advised by the Scientific Advice Working Party (SAWP) of the European Medicines Agency (EMA) that filing for a Conditional Marketing Approval (CMA) for iopofosine I 131 as a treatment for post-Bruton Tyrosine Kinase inhibitor (BTKi) refractory patients with Waldenstrom macroglobulinemia (WM) could be acceptable for CMA.
Plans to submit a New Drug Application (NDA) to the U.S. Food and Drug Administration (FDA) for the accelerated approval of iopofosine I 131 as a treatment for WM once the confirmatory trial is underway, which is subject to sufficient funding.
The Phase 3 study for iopofosine I 131, a potentially first-in-class, targeted radiotherapeutic candidate for the treatment of relapsed/refractory WM will be a comparator, randomized controlled study with approximately 100 patients per arm with full patient enrollment projected within 18-24 months of the first patient admitted to the study.
The Company has received clearance for its Investigational New Drug application for CLR 125, the Company’s lead Auger-emitting (iodine-125) PRC for a Phase 1b/2a dose finding study in triple-negative breast cancer. CLR 125 provides the greatest precision in targeted radiotherapy as emissions only travel a few nanometers.
The Company announced a partnership with Evestia Clinical to provide CRO services to support their upcoming Phase 1b study evaluating CLR 125 for the treatment of triple-negative breast cancer (TBNC).
Received rare pediatric drug designation (RPDD) for iopofosine I 131 in inoperable relapsed or refractory pediatric high-grade glioma (r/r pHGG).
Interim data from the Phase 1b dose and optimization study, CLOVER-2, was highlighted in an oral presentation at the American Association for Cancer Research (AACR) (Free AACR Whitepaper) Special Conference on Pediatric Cancer. Results showed extended progression-free survival along with overall survival, and iopofosine I 131 was well tolerated and its toxicity profile was consistent with the Company’s previously reported safety data.
Presented preclinical data from CLR 121225 (CLR 225), a novel actinium-based radio conjugate alpha-emitter for treatment of hypoxic pancreatic ductal adenocarcinoma (PDAC) at the American Association for Cancer Research (AACR) (Free AACR Whitepaper) Special Conference on Pancreatic Cancer Research. In three separate pancreatic cancer xenograft models, CLR 225 demonstrated inhibition of tumor growth or reduction in tumor volume, dependent on dose, with potential survival benefit following treatment.
The Company has entered into a supply agreement with ITM Isotope Technologies Munich (ITM) for Actinium-225 (Ac-225), which will support clinical development of Cellectar’s actinium-labeled compound CLR 225.
CLR 225 has completed the required Investigational New Drug (IND)-enabling studies and the company maintains the option to move into a Phase 1 study. Previous data from CLR 225 has demonstrated activity in multiple solid tumor animal models, including pancreatic, colorectal and breast cancer.
Raised approximately $12.7 million. These funds will be used to advance the Company’s TNBC study and to complete the EMA Conditional Marketing Authorization application for iopofosine I 131 for WM.
Third Quarter 2025 Financial Highlights
Cash and Cash Equivalents: As of September 30, 2025, the company had cash and cash equivalents of $12.6 million, compared to $23.3 million as of December 31, 2024. The company believes its cash balance as of September 30, 2025, is adequate to fund its budgeted operations into the third quarter of 2026. Following the close of the third quarter in October 2025, several institutional investors exercised certain existing warrants for gross proceeds to the company of approximately $5.8 million prior to deducting placement agent fees and estimated offering expenses.
Research and Development Expenses: R&D expenses for the three months ended September 30, 2025, were approximately $2.5 million, compared to approximately $5.5 million for the three months ended September 30, 2024. The overall decrease was primarily a result of reduced clinical trial costs.
General and Administrative Expenses: G&A expenses for the three months ended September 30, 2025, were approximately $2.3 million, compared to approximately $7.8 million for the same period in 2024. The decrease was primarily driven by lower commercialization and personnel costs.
Net Loss: The net loss attributable to common stockholders for the three months ended September 30, 2025, was $4.4 million, or $1.41 per basic and diluted share, compared to a net loss of $14.7 million, or $11.18 per basic and $12.13 per diluted share in the three months ended September 30, 2024.
Conference Call & Webcast Details
Cellectar management will host a conference call and webcast today, November 13, 2025, at 8:30 AM Eastern Time to discuss these results and answer questions. Stockholders and other interested parties may participate in the conference call by dialing 1-800-717-1738. A live webcast of the conference call can be accessed in the "Events & Presentations" section of Cellectar’s website at www.cellectar.com. A recording of the webcast will be available and archived on the Company’s website for approximately 90 days.
(Press release, Cellectar Biosciences, NOV 13, 2025, View Source [SID1234661043])