Additional Positive Data from Phase 1 of BEXMAB

Inside Information: Additional Positive Data from the Phase 1 Part of the BEXMAB Study in Both Higher-Risk HMA-Failed MDS and r/r AML

Company announcement, 18 March 2024 at 7:00 a.m. GMT / 9:00 a.m. EET

Key highlights

• Latest readout of the BEXMAB study shows more responding patients and good durability of remission amongst HR HMA-failed MDS patients.
• 4/5 of the initial Phase 1 HR HMA-failed MDS patients were still alive after eight months of follow-up.
• While data do not yet allow the precise estimation of median overall survival, the survival benefit seen with the current follow-up already for these 5 first patients is very encouraging. This compares favorably to what has been seen with contemporary comparators.
• 3 additional HMA-failed HR MDS patients have been enrolled in Phase 1 part, leading to a total of 7 out of 8 patients responding, an overall response rate of 87.5%.
• Faron will be hosting a virtual webinar to discuss the additional data tomorrow, Tuesday, 19 March at 11.00 EET/9am GMT.

TURKU, Finland / BOSTON, Massachusetts - Faron Pharmaceuticals Ltd. (AIM: FARN, First North: FARON), a clinical-stage biopharmaceutical company pursuing a CLEVER approach to reprogramming myeloid cells to activate anti-tumor immunity in hematological and solid tumor microenvironments, today provided further data from patients treated during the Phase 1 part of the ongoing BEXMAB trial that has moved into Phase 2 for higher-risk (HR) myelodysplastic syndrome (MDS) patients failed on previous hypomethylating agent (HMA).

Previous BEXMAB study results indicated a high overall response rate (ORR) of 5/5 amongst HR HMA-failed MDS patients, for whom there is no approved treatment. The majority of the initial Phase 1 patients have now been on treatment with bexmarilimab together with azacitidine for more than six months, and only one patient has been lost due to transformation of their HR MDS into acute myeloid leukemia (AML). Out of these initial 5 patients, 4 remain alive after eight months. Normally, patients with relapsed or refractory HR MDS have a median overall survival (mOS) of fewer than six months. The mOS of patients treated in the BEXMAB trial is not yet available but, based on the current data, it is estimated to be significantly higher than traditionally seen with current standard of care (or with current approved treatments).

After the already reported 5 HMA-failed HR MDS patients, 3 new HMA-failed HR MDS patients were enrolled, filling the remaining Phase 1 slots. Whilst it is too early to assess these patients for survival or durability, the previously seen high ORR has been corroborated with 2/3 responders. The third patient dropped out of the study early in cycle two due to an unrelated serious adverse event (SAE), bringing the current ORR to 7/8 patients (87.5%) in the HMA-failed HR MDS population. The best responses for these 8 patients are as follows: 1 complete response (CR), 3 marrow complete remissions (mCR), 1 partial response (PR), 2 hematological improvements, and 1 stable disease (SD) that dropped out early due to an unrelated SAE.

Mika Kontro, MD, PhD, Associate Professor at the Helsinki University Hospital Comprehensive Cancer Center and Principal Investigator of the BEXMAB trial, said: "We are continuing to see encouraging data from the BEXMAB trial with usually unresponsive patients going into remission after treatment with bexmarilimab and azacitidine. Whilst we don't have median overall survival rates yet, it is encouraging to see that some patients are alive and, importantly, enjoying a good quality of life even up to 12+ months after treatment initiation. I continue to be very excited about the potential of bexmarilimab to considerably improve outcomes for patients suffering from these aggressive conditions."

• Markku Jalkanen, Chief Executive Officer of Faron, said: "These data are really remarkable and confirm our belief that we may finally have a treatment for this underserved patient population. The data are strongly supportive that a registrational trial would be positive against any contemporary comparator when the final endpoint is survival. We eagerly await completion of the Phase 2 part of the BEXMAB study so we can take these data to the FDA as soon as possible."

For the 5 frontline HR MDS patients with 100% ORR previously reported at the American Society of Hematology (ASH) Annual Meeting last year, mOS has also not yet been reached. For the r/r AML patient cohort reported at ASH, which is bigger in size (n= 18) and more mature in follow-up (median follow-up six months), the mOS is currently estimated to be over 8 months (still subject to change as some patients are still ongoing). The historical mOS for this population is around six months, which means that the current data would support running a registrational trial with mOS also as the endpoint in this population.

Faron will be hosting a virtual webinar to discuss these data tomorrow, Tuesday, 19 March, at 11.00 EET/9am GMT.

There will be an opportunity to ask questions during the webcast. To register for the event visit: https://faron.videosync.fi/bexmab-study-update/ or contact the IR team for more information at investor.relations@faron.com.

About Bexmarilimab

About Faron Pharmaceuticals Ltd.