PRESS RELEASE AB SCIENCE ANNOUNCES A NEW PUBLICATION ON BIORXIV THAT IDENTIFIES AND CHARACTERIZES A NOVEL SMALL SYNTHETIC MOLECULE, AB8939, AS A PROMISING DRUG CANDIDATE FOR TREATING REFRACTORY ACUTE MYELOID LEUKEMIA (AML) AND POTENTIALLY OTHER CANCERS AB8939 is a promising drug candidate for refractory AML, especially for cases with poor prognoses such as complex karyotypes, MECOM rearrangements, and TP53 mutations AB8939 has dual action against both proliferating tumor cells (via tubulin disruption) and q ...

PRESS RELEASE AB SCIENCE ANNOUNCES A NEW PUBLICATION ON BIORXIV THAT IDENTIFIES AND CHARACTERIZES A NOVEL SMALL SYNTHETIC MOLECULE, AB8939, AS A PROMISING DRUG CANDIDATE FOR TREATING REFRACTORY ACUTE MYELOID LEUKEMIA (AML) AND POTENTIALLY OTHER CANCERS AB8939 is a promising drug candidate for refractory AML, especially for cases with poor prognoses such as complex karyotypes, MECOM rearrangements, and TP53 mutations AB8939 has dual action against both proliferating tumor cells (via tubulin disruption) and q ...

PRESS RELEASE AB SCIENCE ANNOUNCES NEW PUBLICATION ON MEDRXIV HIGHLIGHTING CLINICAL BENEFIT WITH MASITINIB IN AMYOTROPHIC LATERAL SCLEROSIS PATIENTS PRIOR ANY COMPLETE LOSS OF FUNCTION Significant improvement in functional decline measured by the ALSFRS-R score, with a 4.04-point difference favoring masitinib over placebo (p=0.0065)Significant benefit on CAFS (relative benefit +20.2%, p=0.0290)Median progression-free survival (PFS) extended by 9 months (p=0.0057)Median overall survival (OS) increased by 12 ...

Core Viewpoint - AB Science has successfully completed a private placement raising EUR 2.8 million to finance the clinical development of its drug candidate AB8939 for acute myeloid leukemia (AML) [2][4]. Use of Proceeds - The net proceeds from the private placement will primarily be used to complete phase 1 of the AB8939 program and to initiate an expansion study involving approximately 15 AML patients [4][5]. Financial Impact - The private placement strengthens the company's cash position, allowing it to meet its financing needs for 2025 and beyond [5]. Private Placement Details - The private placement involved the issuance of 2,477,877 new ordinary shares, each accompanied by a share warrant (BSA), without preferential subscription rights [6][7]. - The issue price of one ABSA is set at EUR 1.13, reflecting a 24.99% discount to the volume-weighted average price over the preceding three trading days [8][9]. Shareholding Structure - Post-private placement, the company's total share capital will amount to EUR 729,474.72, consisting of 66,184,793 ordinary shares, with potential dilution from the exercise of BSAs [13][15]. Trading Information - The new shares are expected to be admitted to trading on Euronext Paris on October 22, 2025, and will be assimilated to existing shares [18]. Company Overview - AB Science specializes in the research, development, and commercialization of protein kinase inhibitors, targeting diseases with high unmet medical needs [25]. - The lead compound, masitinib, is already registered for veterinary use and is being developed for human medicine across various disease areas [25]. Drug Candidate Information - AB8939 is a synthetic microtubule-destabilizing drug candidate with broad anticancer activity, showing potential to overcome drug resistance commonly seen in chemotherapy [24].

Core Viewpoint - AB Science S.A. successfully completed a private placement raising EUR 1.8 million to finance ongoing activities, particularly focusing on the clinical development of the AB8939 program [1][3]. Group 1: Private Placement Details - The private placement involved the issuance of 1,538,463 new ordinary shares, each with one share warrant attached, without preferential subscription rights [4]. - The issue price of one ABSA was set at EUR 1.17, reflecting a 24.8% discount to the volume-weighted average price over the three trading days prior [6][7]. - The total share capital post-placement will be EUR 661,764.30, comprising 59,368,757 ordinary shares, with potential increases if all BSAs are exercised [11]. Group 2: Use of Proceeds - The net proceeds from the private placement will primarily be allocated to the clinical development of the AB8939 program [3]. Group 3: Shareholder Impact - The issuance of ABSAs will result in a dilution of existing shareholders' stakes, with specific percentages outlined for major shareholders before and after the placement [12][14]. - The theoretical value of each BSA is estimated at EUR 0.4053, based on a volatility of 34.355% [9]. Group 4: Trading and Listing - The new shares are expected to be admitted to trading on Euronext Paris on May 22, 2025, and will be assimilated to existing shares [16]. - The BSAs are anticipated to be listed on Euronext Growth Paris by May 26, 2025 [10]. Group 5: Company Overview - AB Science specializes in the research, development, and commercialization of protein kinase inhibitors, targeting diseases with high unmet medical needs [25]. - The lead compound, masitinib, is being developed for various medical applications, including oncology and inflammatory diseases [25][23].

Financial and Corporate Situation - AB Science reported an operating deficit of €6.1 million as of December 31, 2024, a decrease of 55% compared to €13.4 million in 2023 [6][26] - The cash position stood at €8.0 million as of December 31, 2024 [6] - Operating income increased by 10% to €1.072 million in 2024 from €0.970 million in 2023 [27] - Operating expenses decreased by 50%, amounting to €7.244 million less than in 2023 [27][28] Clinical Development - AB Science provided updates on the AB8939 microtubule program, which targets relapsed/refractory acute myeloid leukaemia (AML) [3][4] - The Phase 1 study of AB8939 included 28 patients, assessing the maximum tolerated dose after 3 consecutive days of treatment, with a second stage nearing completion for 14 consecutive days [4][5] - AB8939 showed a 50% response rate against the MECOM gene rearrangement, which is associated with poor prognosis in AML [7][8] Masitinib Platform - Positive results were reported from the Phase 2 study of masitinib in COVID-19, with an odds ratio of 2.4 in favor of the treatment arm after 15 days [16][18] - The European Medicines Agency (EMA) issued a negative opinion for the conditional marketing authorization of masitinib in ALS [19] - A new confirmatory study for masitinib in ALS will be launched, targeting the best responders [21] Intellectual Property Developments - AB Science secured intellectual property rights for AB8939 in AML until 2036 and potentially until 2044 for specific chromosomal abnormalities [8] - New patents were granted for masitinib in the treatment of severe systemic mastocytosis, sickle cell disease, and other indications, extending protection until 2041 or 2042 [23][25][24] Capital Increase and Financial Strategy - A capital increase of €5 million was announced through the issuance of 5,368,725 new ordinary shares [31][34] - The proceeds from the capital increase will support AB Science's activities over the next twelve months [36] - The company has engaged in a Term Capital Increase Program (PACT) with Alpha Blue Ocean, which has provided additional funding [37] Market Position and Analyst Coverage - AB Science has received coverage initiation from DNA Finance and In Extenso Finance, with strong buy opinions indicating a compelling investment opportunity in the biotech sector [41][42]