Trastuzumab pamirtecan, an investigational HER2-targeted antibody-drug conjugate, met the primary efficacy endpoint in a Phase 2 cohort of heavily pre-treated patients with HER2-expressing, recurrent endometrial cancer, an area of high unmet medical need Trastuzumab pamirtecan 是一种研究性的 HER2 靶向抗体药物偶联物,在一项针对 HER2 表达、复发性子宫内膜癌且经过多轮治疗的患者的 2 期队列研究中达到了主要疗效终点,这一领域存在高度未满足的医疗需求。Data demonstrated clinically meaningful antitumor activity across all HER2 expression levels and a manageable safety profile, with centrally 数据表明,在所有 HER2 表达水平上都显示出具有临床意义的抗肿瘤活性,并且安全性可控,集中分析显示。i iHER2-tested patients showing a confirmed objective response rate of 47.9% in all evaluable patients, 49.3% in patients with prior immune checkpoint inhibitor treatment, and a median progression-free survival of 8.1 months HER2检测患者在所有可评估患者中确认的客观缓解率为47.9%,在既往接受过免疫检查点抑制剂治疗的患者中为49.3%,中位无进展生存期为8.1个月。Largest trial to date to report results for a HER2-targeted 迄今为止报告HER2靶向结果的最大试验antibody-drug conjugate 抗体药物偶联物in this indication supports potential of trastuzumab pamirtecan in real-world patient populations, including patients with lower HER2 expression levels and prior checkpoint inhibitor treatment 在此适应症中,支持曲妥珠单抗帕米特坎在真实世界患者群体中的潜力,包括HER2表达水平较低的患者和既往接受过检查点抑制剂治疗的患者。MAINZ, Germany, April 11, 2026 德国美因茨,2026年4月11日– –BioNTech SE BioNTech SE(Nasdaq: BNTX, “BioNTech” or “the Company”) today announced positive results from the primary analysis of a Phase 2 cohort evaluating trastuzumab pamirtecan (BNT323/DB-1303) in patients with HER2-expressing, advanced endometrial cancer whose disease progressed on or after first-line chemotherapy with or without prior checkpoint inhibitor treatment. (纳斯达克:BNTX,“BioNTech”或“公司”)今天宣布了对一项二期队列主要分析的积极结果,该研究评估了曲妥珠单抗帕米特坎(BNT323/DB-1303)在HER2表达的晚期子宫内膜癌患者中的疗效,这些患者的疾病在一线化疗后或之后出现进展,无论是否接受过先前的检查点抑制剂治疗。This cohort is part of a global Phase 1/2a clinical trial (. 该队列是全球 1/2a 期临床试验的一部分 (。NCT05150691 NCT05150691) investigating the HER2-targeted antibody-drug conjugate (“ADC”) candidate trastuzumab pamirtecan in multiple solid tumors. )研究HER2靶向抗体药物偶联物(“ADC”)候选药物曲妥珠单抗帕米特坎在多种实体瘤中的应用。The data demonstrated clinically meaningful efficacy and a manageable safety profile for trastuzumab pamirtecan monotherapy across all HER2 immunohistochemistry (“IHC”) expression levels (IHC1+, IHC2+, IHC3+) 数据显示,曲妥珠单抗帕密特康单药治疗在所有HER2免疫组化(“IHC”)表达水平(IHC1+、IHC2+、IHC3+)上均具有临床意义的疗效和可控的安全性。ii ii. Outcomes were consistent among patients regardless of prior checkpoint inhibitor treatment. The data will be presented today in an oral session at the 2026 Society of Gynecologic Oncology (“SGO”) Annual Meeting on Women’s Cancers in San Juan, Puerto Rico. . 无论患者之前是否接受过检查点抑制剂治疗,结果都是一致的。这些数据将在波多黎各圣胡安举行的2026年妇科肿瘤学会(“SGO”)女性癌症年度会议上以口头报告的形式呈现。“Endometrial cancer is one of the few cancers with an increasing mortality rate, “子宫内膜癌是少数几种死亡率不断上升的癌症之一,1 1and there is an urgent need for new treatment options, especially for patients with recurrent disease with lower HER2 expression levels where current standard-of-care chemotherapy offers only a 15 % response rate 急需新的治疗方案,特别是对于HER2表达水平较低的复发性疾病患者,目前标准的化疗方案仅能提供15%的缓解率。2 2,” said “,”说Bhavana Pothuri, M.D., Medical Director of the Clinical Trials Office (CTO) and Director of Gynecologic Oncology Research at the NYU Langone Perlmutter Cancer Center 纽约大学朗格尼医学中心珀尔穆特癌症中心临床试验办公室(CTO)医学主任兼妇科肿瘤研究主任 Bhavana Pothuri 医学博士. “We are encouraged by these results for trastuzumab pamirtecan, which showed clinically meaningful responses across all HER2 levels. Importantly, these results were seen in a broad patient population that reflects real-world clinical practice, including patients who have received prior immune checkpoint inhibitor treatment and those with visceral metastases.”. “我们对trastuzumab pamirtecan的结果感到鼓舞,该药物在所有HER2水平上均显示出具有临床意义的反应。重要的是,这些结果出现在反映真实世界临床实践的广泛患者群体中,包括那些曾经接受过免疫检查点抑制剂治疗的患者以及有内脏转移的患者。”The analysis of the Phase 2 cohort included 145 patients with advanced or metastatic HER2-expressing endometrial cancer whose disease had progressed following first- or later lines of therapy. This cohort met its primary efficacy endpoint of objective response rate (“ORR”) evaluated in 73 patients previously treated with checkpoint inhibitor therapy and confirmed HER2 status by central testing, showing a confirmed ORR of 49.3% (95% CI: 37.4, 61.3). 第二阶段队列的分析包括145名晚期或转移性HER2表达的子宫内膜癌患者,这些患者的疾病在第一线或后续治疗后有所进展。该队列达到了其主要疗效终点,即在73名先前接受过检查点抑制剂治疗并经中心检测确认HER2状态的患者中评估的客观缓解率(“ORR”),显示出49.3%的确证客观缓解率(95%置信区间:37.4,61.3)。In all centrally tested patients (n=96) the confirmed ORR was 47.9% (95% CI: 37.6, 58.4) with a median progression-free survival (“mPFS”) of 8.1 months (95% CI: 5.5, 11.8).. 在所有中心试验的患者(n=96)中,确认的客观缓解率(ORR)为47.9%(95%置信区间:37.6, 58.4),中位无进展生存期(mPFS)为8.1个月(95%置信区间:5.5, 11.8)。Among the 143 efficacy-evaluable patients by local 在143名通过局部评估的有效患者中i 我HER2 status testing, the confirmed ORR was 44.1% (95% CI: 35.8, 52.6). Trastuzumab pamirtecan consistently demonstrated encouraging antitumor activity across all HER2 expression levels, with comparable results whether HER2 testing was conducted locally or centrally. Among patients with local HER2 testing, the confirmed ORR was 33.9% (IHC1+) and 40.4% (IHC2+) in patients with lower levels of HER2 expression, and 73.1% (IHC3+) in patients with higher HER2 expression levels. HER2状态检测中,确认的客观缓解率(ORR)为44.1%(95%置信区间:35.8, 52.6)。Trastuzumab pamirtecan在所有HER2表达水平上均显示出令人鼓舞的抗肿瘤活性,无论HER2检测是本地进行还是集中进行,结果均相似。在本地进行HER2检测的患者中,低HER2表达水平的患者确认的ORR为33.9%(IHC1+)和40.4%(IHC2+),而高HER2表达水平的患者确认的ORR为73.1%(IHC3+)。The median duration of response (“mDoR”) was 10.3 months. mPFS for all evaluable patients (n=145), whether they had received prior checkpoint inhibitor treatment or not, was 8.0 months (95% CI: 5.6, 8.3).. 应答持续时间 (“mDoR”) 的中位数为 10.3 个月。所有可评估患者 (n=145) 的 mPFS,无论是否接受过先前的检查点抑制剂治疗,为 8.0 个月 (95% CI: 5.6, 8.3)。The safety profile was manageable and as expected for HER2-targeted ADCs. The most common treatment-related adverse events (TRAEs) were low-grade nausea, anemia, platelet count decrease, and low-grade fatigue. Grade ≥3 treatment-related adverse events (TRAEs) were reported in 68 of 145 (46.9%) patients. 安全性特征是可管理的,并且与针对HER2的ADC药物预期相符。最常见的治疗相关不良事件(TRAE)为低级别的恶心、贫血、血小板计数减少和低级别疲劳。在145名患者中,有68名(46.9%)报告了等级≥3的治疗相关不良事件(TRAE)。Adjudicated cases of interstitial lung disease (“ILD”) or pneumonitis of grade ≥3 occurred in 4.8% of patients and were consistent with the known safety profile of HER2-targeted ADC therapies. The majority of events grade 3 or higher were efficiently manageable with appropriate medical interventions.. 经判定的间质性肺病(“ILD”)或3级及以上肺炎病例发生在4.8%的患者中,与已知的HER2靶向ADC疗法的安全性一致。大多数3级或以上的事件通过适当的医疗干预可以有效管理。“These positive results in patients with endometrial cancer including those with lower HER2 expression levels support the potential of trastuzumab pamirtecan,” said “这些在子宫内膜癌患者中的积极结果,包括那些HER2表达水平较低的患者,支持了trastuzumab pamirtecan的潜力,”表示Prof. Özlem Türeci, M.D., Co-Founder and Chief Medical Officer at BioNTech Özlem Türeci教授,医学博士,BioNTech联合创始人兼首席医疗官. “HER2 remains an important therapeutic target, particularly in gynecologic cancers and breast cancer. We are continuing to advance trastuzumab pamirtecan, both as a monotherapy and in novel-novel treatment combination approaches, with the aim to address the significant unmet medical needs in the treatment of patients with HER2-driven tumors.”. “HER2仍然是一个重要的治疗靶点,特别是在妇科癌症和乳腺癌中。我们正在继续推进曲妥珠单抗帕米特康的开发,既作为单一疗法,也用于创新的联合治疗方案,目标是满足HER2驱动肿瘤患者在治疗中的显著未满足医疗需求。”Trastuzumab pamirtecan received Fast Track and Breakthrough Therapy designations from the U.S. Food and Drug Administration (“FDA”) for the treatment of endometrial cancer in 2023. A global confirmatory Phase 3 clinical trial Fern-EC-01 ( Trastuzumab pamirtecan 在2023年获得了美国食品药品监督管理局(“FDA”)的快速通道和突破性疗法认定,用于治疗子宫内膜癌。一项全球关键性三期临床试验 Fern-EC-01 (NCT06340568 NCT06340568) evaluating trastuzumab pamirtecan monotherapy compared to chemotherapy in previously treated patients with HER2-expressing, recurrent endometrial cancer is ongoing. BioNTech and DualityBio plan to file a biologics license application (“BLA”) in 2026, subject to regulatory feedback from the FDA. )正在评估曲妥珠单抗帕米特坎单药疗法与化疗在既往接受过治疗的HER2表达、复发性子宫内膜癌患者中的疗效。BioNTech和DualityBio计划在2026年提交生物制品许可申请(“BLA”),但需根据FDA的监管反馈而定。About trastuzumab pamirtecan 关于曲妥珠单抗帕米尔替康Trastuzumab pamirtecan (BNT323/DB-1303) is a third-generation topoisomerase-1 inhibitor-based ADC targeting HER2 and is being developed by BioNTech and Duality Biologics. Trastuzumab pamirtecan was built from DualityBio’s proprietary Duality Immune Toxin Antibody Conjugates (“DITAC”) platform. HER2 is a surface-expressed protein on solid tumors and has been linked to the aggressive growth and spread of cancer cells. Trastuzumab pamirtecan(BNT323/DB-1303)是一种基于第三代拓扑异构酶1抑制剂的抗体药物偶联物(ADC),靶向HER2,由BioNTech和Duality Biologics共同开发。Trastuzumab pamirtecan源自DualityBio专有的双效免疫毒素抗体偶联物(“DITAC”)平台。HER2是一种在实体瘤表面表达的蛋白质,与癌细胞的侵袭性生长和扩散有关。Preclinical data and preliminary clinical data for trastuzumab pamirtecan indicate its potential to target HER2 receptors on solid tumors irrespective of expression level with a manageable safety profile and a potentially expanded therapeutic window.. 临床前数据和初步临床数据表明,曲妥珠单抗帕米特康有望针对实体瘤上的HER2受体,无论其表达水平如何,同时具有可控的安全性特征和潜在扩大的治疗窗口。Trastuzumab pamirtecan is being evaluated in an ongoing Phase 1/2 trial ( Trastuzumab pamirtecan 正在一项正在进行的 1/2 期试验中进行评估 (NCT05150691 NCT05150691) in patients with advanced/metastatic solid tumors, and in two global Phase 3 clinical trials. Fern-EC-01, a randomized Phase 3 clinical trial ( 晚期/转移性实体瘤患者中,以及两项全球三期临床试验中。Fern-EC-01,一项随机三期临床试验(NCT06340568 NCT06340568) evaluating trastuzumab pamirtecan compared with investigator's choice of single agent chemotherapy in previously treated patients with HER2-expressing advanced recurrent endometrial cancer, is currently enrolling patients. DYNASTY-Breast02, a Phase 3 clinical trial ( )评估曲妥珠单抗帕米特坎与研究者选择的单药化疗在既往接受过治疗的HER2表达阳性的晚期复发性子宫内膜癌患者中的疗效,目前正在招募患者。DYNASTY-Breast02,一项三期临床试验(NCT06018337 NCT06018337) evaluating trastuzumab pamirtecan in patients with Hormone Receptor-positive (“HR+”) and Human Epidermal Growth Factor Receptor 2 (“HER2”)-low, metastatic breast cancer that have progressed on hormone and/or cyclin-dependent kinase 4/6 (“CDK4/6”) therapy, is fully enrolled and expected to read out this year. )评估曲妥珠单抗帕米特康在激素受体阳性(“HR+”)和人表皮生长因子受体2(“HER2”)低表达、已在接受激素和/或细胞周期蛋白依赖性激酶4/6(“CDK4/6”)治疗后进展的转移性乳腺癌患者中的疗效,目前已完成入组,预计今年将公布结果。. 。About the Phase 1/2a trial 关于第1/2a阶段试验The global, multi-cohort Phase 1/2a clinical trial ( 全球多队列 1/2a 期临床试验 (NCT05150691 NCT05150691) evaluated the safety and tolerability of trastuzumab pamirtecan in patients with advanced solid tumors that express HER2. Cohort 2b is a Phase 2 expansion cohort which enrolled 145 patients with advanced/metastatic HER2-expressing endometrial cancer whose disease had progressed after first- and later lines of therapy. )评估了曲妥珠单抗帕米特坎在表达HER2的晚期实体瘤患者中的安全性和耐受性。队列2b是一个二期扩展队列,纳入了145名晚期/转移性HER2表达的子宫内膜癌患者,这些患者的疾病在一线及后续治疗后出现进展。The HER2 status was determined for all patients through local testing and, where possible, confirmed via central testing. The primary endpoints were objective response rate in patients with prior checkpoint inhibitor treatment with HER2 expression, confirmed by retrospective central testing, and safety. 通过局部检测确定所有患者的 HER2 状态,并在可能的情况下通过中央检测确认。主要终点是由回顾性中心检测确认的 HER2 表达且既往接受过检查点抑制剂治疗的患者的客观缓解率,以及安全性。Secondary endpoints included ORR, DoR, DCR, PFS and OS. . 次要终点包括ORR、DoR、DCR、PFS和OS。About BioNTech 关于BioNTechBiopharmaceutical New Technologies (BioNTech) is a global next generation immunotherapy company pioneering novel investigative therapies for cancer and other serious diseases. BioNTech exploits a wide array of computational discovery and therapeutic modalities with the intent of rapid development of novel biopharmaceuticals. 生物制药新技术公司(BioNTech)是一家全球下一代免疫治疗公司,致力于开发针对癌症和其他严重疾病的新型研究性疗法。BioNTech利用广泛的计算发现和治疗模式,旨在快速开发新型生物制药。Its diversified portfolio of oncology product candidates aiming to address the full continuum of cancer includes mRNA cancer immunotherapies, next-generation immunomodulators and targeted therapies such as antibody-drug conjugates (ADCs) and innovative chimeric antigen receptor (CAR) T cell therapies. 其多元化的肿瘤学候选产品组合旨在应对癌症的整个连续过程,包括mRNA癌症免疫疗法、下一代免疫调节剂和靶向疗法,如抗体药物偶联物(ADC)和创新的嵌合抗原受体(CAR)T细胞疗法。Based on its deep expertise in mRNA development and in-house manufacturing capabilities, BioNTech and its collaborators are researching and developing multiple mRNA vaccine candidates for a range of infectious diseases alongside its diverse oncology pipeline. BioNTech has established a broad set of relationships with multiple global and specialized pharmaceutical collaborators, including Bristol Myers Squibb, Duality Biologics, Genentech, a member of the Roche Group, Genmab, MediLink, OncoC4, Pfizer and Regeneron.. 基于其在mRNA开发方面的深厚专业知识和内部生产能力,BioNTech及其合作伙伴正在研究和开发多种针对一系列传染病的mRNA疫苗候选产品,同时推进其多样化的肿瘤学管线。BioNTech已与多家全球性和专业制药合作伙伴建立了广泛的合作关系,其中包括百时美施贵宝、Duality Biologics、罗氏集团旗下的基因泰克、Genmab、MediLink、OncoC4、辉瑞和再生元。For more information, please visit 欲了解更多信息,请访问 www.BioNTech.com www.BioNTech.com. 。BioNTech Forward-Looking Statements BioNTech前瞻性声明This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not be limited to, statements concerning: the collaboration between BioNTech and DualityBio to jointly clinically develop antibody-drug conjugates (ADCs) including trastuzumab pamirtecan (BNT323/DB-1303); timing of the Phase 1/2a trial for trastuzumab pamirtecan in advanced/metastatic solid tumors and the global Phase 3 trials as well as any subsequent data readouts; the registrational potential of any trial we may initiate for trastuzumab pamirtecan; the timing of any planned BLA submissions for trastuzumab pamirtecan in any indication; the nature and characterization of and timing for release of clinical data across BioNTech’s platforms, which is subject to peer review, regulatory review and market interpretation; the planned next steps in BioNTech’s pipeline programs, including, but not limited to, statements regarding timing or plans for initiation or enrollment of clinical trials, or submission for and receipt of product approvals with respect to BioNTech’s product candidates; the ability of BioNTech’s mRNA technology to demonstrate clinical efficacy outside of BioNTech’s infectious disease platform; the potential safety and efficacy of BioNTech’s other product candidates; and BioNTech’s anticipated market opportunity and size for its product candidates. 本新闻稿包含1995年《私人证券诉讼改革法案》(经修订)意义上的前瞻性声明,包括但不限于以下声明:BioNTech与DualityBio之间的合作,共同临床开发抗体药物偶联物(ADC),包括曲妥珠单抗帕米尔特坎(BNT323/DB-1303);曲妥珠单抗帕米尔特坎针对晚期/转移性实体瘤的1/2a期试验以及全球3期试验的时间安排及任何后续数据发布;我们可能为曲妥珠单抗帕米尔特坎启动的任何试验的注册潜力;曲妥珠单抗帕米尔特坎在任何适应症中的计划BLA提交时间;BioNTech平台临床数据的性质、特征及发布时间,这些数据需经过同行评审、监管审查和市场解读;BioNTech管线项目计划的下一步行动,包括但不限于关于临床试验启动或招募时间的声明,或关于BioNTech候选产品的审批提交与接收;BioNTech的mRNA技术在非传染病平台之外展示临床效力的能力;BioNTech其他候选产品的潜在安全性和有效性;以及BioNTech对其候选产品的预期市场机会和规模。Any forward-looking statements in this press release are based on BioNTech’s current expectations and beliefs of future events and are subject to a number of risks and uncertainties that could cause actual results to differ materially and adversely from those set forth in or implied by such forward-looking statements. 本新闻稿中的任何前瞻性声明均基于BioNTech当前对未来事件的预期和信念,并受多种风险和不确定性的影响,这些风险和不确定性可能导致实际结果与这些前瞻性声明中所述或暗示的结果存在重大且不利的差异。These risks and uncertainties include but . 这些风险和不确定性包括但不限于 。You should review the risks and uncertainties described under the heading “Risk Factors” in BioNTech’s Report on Form 20-F for the period ended December 31, 2025 and in subsequent filings made by BioNTech with the SEC, which are available on the SEC’s website at 您应当查阅 BioNTech 在截至 2025 年 12 月 31 日的 20-F 表格年报中“风险因素”标题下描述的风险和不确定性,以及 BioNTech 随后向美国证券交易委员会提交的文件,这些文件可在美国证券交易委员会的网站上找到。www.sec.gov www.sec.gov.These forward-looking statements speak only as of the date hereof. Except as required by law, BioNTech disclaims any intention or responsibility for updating or revising any forward-looking statements contained in this press release in the event of new information, future developments or otherwise.. 这些前瞻性声明仅截至本日期有效。除非法律要求,否则BioNTech不承担任何更新或修改本新闻稿中包含的任何前瞻性声明的责任或意图,无论是否出现新信息、未来发展或其他情况。CONTACTS 联系人BioNTech 生物新技术公司Media Relations 媒体关系Jasmina Alatovic 雅斯米娜·阿拉托维奇Media@biontech.de 媒体@biontech.deInvestor Relations 投资者关系Douglas Maffei, PhD 道格拉斯·马费伊,博士Investors@biontech.de 投资者@biontech.dei 我Central testing refers to HER2 expression level analysis performed at a single, designated laboratory, whereas local testing refers to analysis performed at a patient’s individual trial site or local laboratory. 中央检测是指在单一指定实验室进行的HER2表达水平分析,而局部检测是指在患者的个别试验地点或当地实验室进行的分析。ii 二HER2 immunohistochemistry (“IHC”) expression levels: IHC1+ = low expression, IHC2+ = moderate expression, IHC3+ = high expression HER2免疫组织化学(“IHC”)表达水平:IHC1+ = 低表达,IHC2+ = 中度表达,IHC3+ = 高表达1 1National Cancer Institute. Cancer Stat Facts: Uterine Cancer. https://seer.cancer.gov/statfacts/html/corp.html. Accessed March 17, 2026. 国家癌症研究所。癌症统计资料:子宫癌。https://seer.cancer.gov/statfacts/html/corp.html。访问日期:2026年3月17日。2 2Makker V, et al. J Clin Oncol. 2023 Apr 14;41(16):2904–2910. 马凯尔 V 等。《临床肿瘤学杂志》。2023年4月14日;41(16):2904–2910。