Tasquinimod

“We are pleased to have enrolled the first patient into the study where tasquinimod will be evaluated in a patient population with high unmet medical need for new treatment options with a different mechanism of action. I am excited to follow the study progress,” said Dr. Erik Vahtola, CMO of Active Biotech. The single-arm, multi-center open-label study will evaluate the safety and efficacy of tasquinimod given as monotherapy. The run-in safety part (phase I) will determine dose-limiting toxicity during 28 days of treatment in the first patients whereafter enrolment into the efficacy phase II part will begin. The primary efficacy endpoint is the proportion of patients who achieve at least a 35% reduction in spleen volume after six 4-week cycles of tasquinimod. Further, the study will determine the effect of tasquinimod on changes in bone marrow fibrosis, myelofibrosis-related symptoms, changes in variant allele frequency and overall survival. The study will be conducted at the Stichting Haemato-Oncologie Volwassenen Netherland (HOVON) network of study centers in the Netherlands and Germany and HOVON is the legal sponsor of the study. Active Biotech has a global patent license agreement with Oncode Institute for tasquinimod in myelofibrosis since February 2022. Oncode Institute will be the main financier of the study. For more information on the study, see clinicaltrials.gov (NCT06605586), the HOVON website www.hovon.nl and the previously recorded interview with lead principal investigator Rebekka Schneider, connected to Oncode Institute and Erasmus MC https://ir.financialhearings.com/active-biotech-2023.

Lund, June 1, 2022 - Active Biotech (NASDAQ STOCKHOLM: ACTI) and its partner NeoTX announce today the successful completion of the first stage of a Simon 2 stage phase IIa clinical trial of naptumomab estafenatox (NAP, naptumomab), in combination with docetaxel in patients with advanced or metastatic non-small cell lung cancer (NSCLC) who have been previously treated with chemotherapy and checkpoint inhibitors (CPIs). In the study, the patients are treated with NAP for 4 consecutive days and with docetaxel at a standard dose on day 5 in 21-day treatment cycles. The first stage of this trial required a minimum of two responses out of ten patients to move to the second stage of the trial, which is now enrolling. For more information about the trial, visit www.clinicaltrials.gov. NCT04880863 We are pleased by these early encouraging observations and are excited to follow the progress of the trial, which is now enrolling in its second stage, says Erik Vahtola, Chief Medical Officer at Active Biotech. Patients with advanced NSCLC who have progressed on CPI and standard chemotherapy currently have limited treatment options and new treatment alternatives are needed.See also www.neotx.com for NeoTX’s communication related to this information. Helén Tuvesson President & CEO For further information, please contact: Helén Tuvesson, CEO, +46 46 19 21 56, helen.tuvesson@activebiotech.com Hans Kolam, CFO, +46 46 19 20 44, hans.kolam@activebiotech.com This information is information that Active Biotech is obliged to make public pursuant to the EU Market Abuse Regulation. This information was submitted for publication, through the agency of the contact person set out above, at 14.00 pm. CET on June 1, 2022. Active Biotech AB (publ) (NASDAQ Stockholm: ACTI) is a biotechnology company that deploys its extensive knowledge base and portfolio of compounds to develop first-in-class immunomodulatory treatments for specialist oncology and immunology indications with a high unmet medical need and significant commercial potential. Following a portfolio refocus, the business model of Active Biotech aims to advance projects to the clinical development phase and then further develop the programs internally or pursue in partnership. Active Biotech currently holds three projects in its portfolio: The wholly owned small molecule immunomodulators, tasquinimod and laquinimod, both having a mode of actions that includes modulation of myeloid immune cell function, are targeted towards hematological malignancies and inflammatory eye disorders, respectively. Tasquinimod, is in clinical phase Ib/IIa for treatment of multiple myeloma. Laquinimod is in a clinical phase I study with a topical ophthalmic formulation, to be followed by phase II for treatment of non-infectious uveitis. Naptumomab, a targeted anti-cancer immunotherapy, partnered to NeoTX Therapeutics, is in a phase Ib/II clinical program in patients with advanced solid tumors. Please visit www.activebiotech.com for more information. About NeoTX NeoTX is a clinical-stage immuno-oncology company which is developing targeted anticancer immunotherapies utilizing its proprietary Tumor Targeted Superantigen (TTS) platform. TTS binds a genetically engineered bacterial determinant to the tumor surface while simultaneously activating and expanding tumor specific immune cells that are then redirected from the periphery to the tumor to mount an effective response. The company’s lead TTS molecule, naptumomab estafenatox is currently in clinical development for advanced solid tumors (clinicaltrials.gov/NCT039883954 and NCT04880863). Please visit www.neotx.com for more information. Naptumomab was licensed from Active Biotech to NeoTX Therapeutics Ltd in 2016. NeoTX is responsible for the global development and commercialization of naptumomab for the treatment of cancer under the license agreement. Active Biotech AB(Corp. Reg. No. 556223-9227)Scheelevägen 22, SE-223 63 Lund, SwedenTel: +46 (0)46 19 20 00 Attachment 220601_phase IIa clinical trial naptumomab in combination with docetaxel