• Study data also showed prolonged progression-free survival with ¹⁷⁷Lu-edotreotide compared to everolimus across patient subgroups

Berlin, Germany, October 18, 2025 – ITM Isotope Technologies Munich SE (ITM), a leading radiopharmaceutical biotech company, today announced a higher objective response rate (ORR) and prolonged median progression-free survival (mPFS) across subgroups in patients treated with non-carrier-added (n.c.a) ¹⁷⁷Lu-edotreotide (also known as ITM-11 or ¹⁷⁷Lu-edotreotide) compared to everolimus from its Phase 3 COMPETE trial in Grade 1 or Grade 2 somatostatin receptor (SSTR)-positive gastroenteropancreatic neuroendocrine tumors (GEP-NETs). Study investigator Jaume Capdevila, MD, PhD, presented the data in an oral presentation at the European Society for Molecular Oncology (ESMO) Congress, held October 17-21, 2025 in Berlin, Germany.

As announced in January and at ENETS in March 2025, the Phase 3 COMPETE trial met its primary endpoint, demonstrating a statistically significant improvement in mPFS (p<0.022) in patients treated with investigational radiotherapeutic agent n.c.a. ¹⁷⁷Lu-edotreotide compared with everolimus. The mPFS was centrally assessed by a Blinded Independent Central Review (BICR). A total of 309 patients were randomized to either ¹⁷⁷Lu-edotreotide (n=207) or everolimus (n=102).

Key findings included:

• ORR, a key secondary endpoint, was significantly higher in the ¹⁷⁷Lu-edotreotide arm vs. everolimus
• mPFS, by central assessment, was longer in the ¹⁷⁷Lu-edotreotide arm in patient subgroups: gastroenteric NET, pancreatic NET, Grade 1, Grade 2, 1st line, 2nd line ​
• Frequency of patients who experienced treatment-emergent adverse events (TEAEs) leading to premature study discontinuation was lower in the ¹⁷⁷Lu-edotreotide arm
  

“The prolonged PFS observed across patient subgroups reinforces the consistent therapeutic effect and safety profile of ¹⁷⁷Lu-edotreotide,” said Dr. Capdevila, senior medical oncologist at Vall d'Hebron University Hospital, Barcelona.“Importantly, the low rate of discontinuations due to treatment-emergent adverse events underscores ¹⁷⁷Lu-edotreotide's tolerability.”

“These additional results, in particular meeting a key secondary endpoint of objective response rate, reinforce ¹⁷⁷Lu-edotreotide's potential as an important treatment option for GEP-NET patients,” said Dr. Andrew Cavey, chief executive officer of ITM.“The COMPETE trial demonstrated that many patients experienced partial or complete responses with ¹⁷⁷Lu-edotreotide.”

Recently, ITM presented dosimetry data from the COMPETE trial in an oral presentation at the European Association of Nuclear Medicine (EANM) Annual Congress, in Barcelona, Spain. The data showed that ¹⁷⁷Lu-edotreotide delivered targeted radiation to tumors while minimizing exposure to healthy tissue, supporting its efficacy and safety profile. The presentation by Dr. Emmanuel Deshayes, COMPETE study investigator and nuclear medicine physician, received the Marie Curie Award, in recognition of exceptional scientific quality and contribution to the field of nuclear medicine.
Oral Presentation Information:
Title:“Efficacy, safety and subgroup analysis of ¹⁷⁷Lu-edotreotide vs everolimus in patients with Grade 1 or Grade 2 GEP-NETs: Phase 3 COMPETE trial“
Date and Time : October 18, 2025, 11:05-11:15 am CEST, followed by Q&A and discussion
Session and Room Number: NETs and endocrine tumours Proffered Paper session , Karlsruhe Auditorium - Hall 5.2
Presenter: Jaume Capdevila, MD, PhD, study investigator and senior medical oncologist at Vall d'Hebron University Hospital, Barcelona
About the COMPETE Trial
The COMPETE trial (NCT03049189) evaluated ¹⁷⁷Lu-edotreotide (ITM-11), a proprietary, synthetic, targeted radiotherapeutic investigational agent compared to everolimus, a targeted molecular therapy, in patients with inoperable, progressive Grade 1 or Grade 2 gastroenteropancreaticneuroendocrine tumors (GEP-NETs). This trial met its primary endpoint, with ¹⁷⁷Lu-edotreotide demonstrating clinically and statistically significant improvement in progression-free survival (PFS) compared to everolimus. ¹⁷⁷Lu-edotreotide is also being evaluated in COMPOSE, a Phase 3 study in patients with well-differentiated, aggressive Grade 2 or Grade 3, SSTR-positive GEP-NET tumors.

About GEP-NETS
Neuroendocrine tumors (NETs) are a rare form of cancer, with an estimated 8 new cases per 100,000 individuals diagnosed each year in the U.S. and 9 cases per 100,000 in Europe. The incidence of NETs has steadily increased over recent decades, resulting, in part, from improved diagnosis. Gastroenteropancreatic neuroendocrine tumors (GEP-NETS) originate in the neuroendocrine system and are made up of nerve cells and hormone-producing cells. They can occur anywhere in the GI tract and pancreas, including the stomach, small intestine, colon, rectum, and appendix. There is still a high unmet medical need for treatment options, as many patients are asymptomatic and diagnosed at a late stage with metastatic disease.

About ITM Isotope Technologies Munich SE
ITM, a leading radiopharmaceutical biotech company, is dedicated to providing a new generation of radiopharmaceutical therapeutics and diagnostics for hard-to-treat tumors. We aim to meet the needs of cancer patients, clinicians and our partners through excellence in development, production and global supply of medical radioisotopes. With improved patient benefit as the driving principle for all we do, ITM advances a broad precision oncology pipeline, including multiple phase 3 studies, combining the company's high-quality radioisotopes with a range of targeting molecules. By leveraging our two decades of pioneering radiopharma expertise, central industry position and established global network, ITM strives to provide patients with more effective targeted treatment to improve clinical outcome and quality of life.

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• 20251018_ITM Announces Phase 3 COMPETE Data Demonstrating a Statistically Significant Higher Objective Response Rate with n.c.a. 177Lu-edotreotide (ITM-11) vs. Everolimus in Patients with Gastroenteropancreatic Neuroendocrine Tumors at ESMO 2025

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