GLPG US, Inc.

Adaptimmune and Galapagos to conduct clinical proof-of-concept trial to evaluate the safety and efficacy of uza-cel (next-generation MAGE-A4 TCR T-cell therapy) produced on Galapagos' decentralized manufacturing platform in patients with head & neck cancer Uza-cel has shown encouraging results in head & neck cancer with partial responses in four out of five patients to date in a Phase 1 trial using Adaptimmune's centralized manufacturing platform Initial in vitro testing of uza-cel produced on Galapagos' decentralized manufacturing platform has shown encouraging data that support further clinical development Adaptimmune to receive initial payments of $100 million, comprising $70 million upfront and $30 million of R&D funding, option exercise fees of up to $100 million, additional development and sales milestone payments of up to a maximum of $465 million, plus tiered royalties on net sales Galapagos has been granted an option to exclusively license uza-cel for global development and commercialization in head & neck cancer, and potential future solid tumor cancer indications Adaptimmune will hold a conference call tomorrow (May 31st) at 8 a.m. EDT (webcast link here and more details below) Philadelphia, Pennsylvania and Oxford, United Kingdom--(News - May 30, 2024) - Adaptimmune Therapeutics plc (NASDAQ: ADAP), and Galapagos NV (NA: GLPG) (NASDAQ: GLPG) announced today that they have entered into a clinical collaboration agreement with an option to exclusively license Adaptimmune's next-generation TCR T-cell therapy (uza-cel) targeting MAGE-A4 for head & neck cancer and potential future solid tumor indications, using Galapagos' decentralized cell manufacturing platform. Uza-cel is a next-generation clinical-stage engineered TCR T-cell therapy developed by Adaptimmune, targeting the MAGE-A4 cancer antigen expressed in various solid tumors. Uza-cel is engineered to express the CD8α co-receptor alongside the engineered TCR that targets MAGE-A4. Data indicate that co-expression of CD8α may broaden and increase the immune response against solid tumors.1 The Adaptimmune sponsored Phase 1 SURPASS trial with centrally manufactured uza-cel has shown encouraging results in head & neck cancer with an overall response rate of 80%. Initial in vitro results suggest that uza-cel, produced on Galapagos' decentralized manufacturing platform, yields early phenotype T-cells that could improve efficacy and durability compared to uza-cel centrally manufactured on Adaptimmune's platform.2 In addition, Galapagos' decentralized manufacturing platform offers the potential for the delivery of fresh, fit cells with a vein-to-vein time of seven days in a patient population in which rapid access to treatment is vital. Adrian Rawcliffe, Adaptimmune's Chief Executive Officer: "Data with uza-cel from our Phase 1 SURPASS trial has demonstrated compelling early results in ovarian, bladder, and head & neck cancers. In head & neck cancer, we have seen reductions in target lesions across all five patients treated to date, and there have been four confirmed partial responses. Combining uza-cel with Galapagos' unique decentralized manufacturing platform is a natural synergy and has the potential to deliver an even more effective TCR T-cell therapy for people with critical late-stage cancers." Dr. Paul Stoffels3, Galapagos' Chief Executive Officer and Chairman: "We are excited to partner with Adaptimmune, a pioneer in TCR T-cell therapy, as this fully aligns with our strategic vision to advance novel cell therapies. This collaboration enables us to expand our oncology cell therapy portfolio to include treatments for solid tumors and next-generation therapies, leveraging our innovative, decentralized cell therapy manufacturing platform. For patients with head & neck cancer, an area with significant unmet medical needs, this collaboration offers the promise for faster access to a potentially transformative treatment." Under the terms of the agreement, Adaptimmune will receive an upfront exclusivity payment of $70 million, plus $15 million in R&D funding at signing. A further $15 million in R&D funding will follow subject to the start of dosing in the proof-of-concept trial. Adaptimmune will be responsible for the clinical proof-of-concept trial in head & neck cancer and the supply of the vector for the manufacturing of uza-cel. Galapagos will be responsible for the delivery of fresh uza-cel product for the head & neck cancer proof-of-concept trial using its innovative, decentralized cell therapy manufacturing platform. Adaptimmune will retain the right to develop, manufacture, commercialize, and otherwise exploit uza-cel for platinum-resistant ovarian cancer (currently being developed in the SURPASS-3 trial). Following completion of the proof-of-concept trial, Galapagos has an exclusive option to license global rights to uza-cel for a maximum of $100 million, depending on the number of indications in relation to which the option is exercised. In addition, Adaptimmune is eligible to receive development, regulatory and sales milestone payments of up $465 million, unless the agreement is terminated, and tiered royalties on net sales in the mid-single to low-double digit range. Conference call / webcast details - 8 a.m. EDT May 31st A live webcast and replay can be accessed at . Call in information is as follows: 1-844-763-8274 (US or Canada) or +1-647-484-8814. Callers should dial in 5-10 minutes prior to the scheduled start time and simply ask to join the Adaptimmune call. About Galapagos' T-cell manufacturing platform Galapagos' decentralized, innovative T-cell manufacturing platform has the potential for the administration of fresh, fit cells within a median vein-to-vein time of seven days, greater physician control and improved patient experience. The platform consists of an end-to-end xCellit™ workflow management and monitoring software system, a decentralized, functionally closed, automated manufacturing platform for cell therapies (using Lonza's Cocoon®) and a proprietary quality control testing and release strategy. About Galapagos We are a biotechnology company with operations in Europe and the US dedicated to developing transformational medicines for more years of life and quality of life. Focusing on high unmet medical needs, we synergize compelling science, technology, and collaborative approaches to create a deep pipeline of best-in-class small molecules, CAR-T therapies, and biologics in oncology and immunology. With capabilities from lab to patient, including a decentralized CAR-T manufacturing network, we are committed to challenging the status quo and delivering results for our patients, employees and shareholders. For additional information, please visit or follow us on LinkedIn or X (formerly Twitter). About Adaptimmune Adaptimmune is a clinical-stage biopharmaceutical company focused on designing, developing, and delivering cell therapies to transform the lives of people with cancer. The Company's unique engineered T-cell receptor (TCR) platform enables the engineering of T-cells to target and destroy cancers across multiple solid tumor types. Forward-looking statement This release contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 (PSLRA). These forward-looking statements involve certain risks and uncertainties. Such risks and uncertainties could cause our actual results to differ materially from those indicated by such forward-looking statements, and include, without limitation: the success, cost and timing of our product development activities and clinical trials and our ability to successfully advance our TCR therapeutic candidates through the regulatory and commercialization processes. For a further description of the risks and uncertainties that could cause our actual results to differ materially from those expressed in these forward-looking statements, as well as risks relating to our business in general, we refer you to our Annual Report on Form 10-K filed with the Securities and Exchange Commission for the year ended 31 December, 2023, our Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and other filings with the Securities and Exchange Commission. The forward-looking statements contained in this press release speak only as of the date the statements were made and we do not undertake any obligation to update such forward-looking statements to reflect subsequent events or circumstances. Adaptimmune Contacts Investor Relations Juli P. Miller, Ph.D. - VP, Corporate Affairs and Investor Relations M : +1 215 460 8920 Juli.Miller@adaptimmune.com Media Relations Dana Lynch, Senior Director of Corporate Communications M: +1 267 990 1217 Dana.Lynch@adaptimmune.com 1 Poster presentation ESMO 2021: Safety and efficacy from the SURPASS trial with ADP-A2M4CD8, a SPEAR T-cell therapy incorporating a CD8α co-receptor and an affinity optimized TCR targeting MAGE-A4, Annals of Oncology, vol. 32, suppl. 5, pp. S604-S605. Poster presentation SITC 2021: Enhancement of TCR-engineered T-cells targeting MAGE-A4 antigen by co-expression of CD8α and inhibition of AKT signaling during ex vivo T-cell expansion. SITC Annual Meeting. Nov. 10-14, 2021. Washington, DC and virtual. Emily Schmidt, PhD, et al. 2 Data on > 3 Throughout this press release, 'Dr. Paul Stoffels' should be read as 'Dr. Paul Stoffels, acting via Stoffels IMC BV' To view the source version of this press release, please visit

Thermo Fisher Scientific to provide CAR-T manufacturing and kitting services for Galapagos’ point-of-care CAR-T product candidate in the San Francisco areaAgreement follows previously announced collaboration with Landmark Bio for decentralized CAR-T manufacturing in the Boston area Mechelen, Belgium; 4 January 2024, 22:01 CET; Galapagos NV (Euronext & NASDAQ: GLPG) today announced that it has entered into a strategic collaboration agreement with Thermo Fisher Scientific, Inc. (NYSE: TMO) (“Thermo Fisher”) for the decentralized manufacturing of Galapagos’ point-of-care CAR-T product candidate in the San Francisco area. Under the terms of the agreement, Thermo Fisher will provide GMP manufacturing as well as BioServices and Specialty Logistics for Galapagos’ CAR-T hemato-oncology clinical program in the San Francisco area, effective January 2024. Galapagos will initiate the technology transfer to enable Thermo Fisher’s manufacturing activities. This collaboration follows Galapagos’ agreement with Landmark Bio for decentralized CAR-T manufacturing in the Boston area announced in November 2023. “As we continue to execute on our global CAR-T expansion strategy, we are very pleased to collaborate with Thermo Fisher, a leader in accelerating life sciences research and the development of life-changing therapies,” said Dr. Paul Stoffels1, CEO and Chairman of Galapagos. “Together we will establish a decentralized CAR-T manufacturing network in the San Francisco area to support the rollout of our pivotal clinical trials and enhance our market readiness. This collaboration will advance Galapagos’ commitment to better meeting patient needs and making CAR-T therapies available to more patients through the rapid delivery of fit CAR-T cells.” ​“This collaboration marks the start of an exciting journey to support Galapagos with their decentralized manufacturing strategy,” stated Jennifer Cannon, president of Commercial Operations for Thermo Fisher Scientific's Pharma Services organization. “As a continued investment in our broad range of cell and gene therapy capabilities, our recently opened San Francisco site provides expertise and flexibility in manufacturing, as well as BioServices & Specialty Logistics, to support customers such as Galapagos from early development work through commercialization.” Financial terms of the agreement are not disclosed. About Galapagos’ decentralized CAR-T manufacturing platformGalapagos’ decentralized, innovative point-of-care CAR-T manufacturing platform offers the potential for the administration of fit cells within a median vein-to-vein time of 7 days, greater physician control and exceptional patient experience. The platform consists of an end-to-end xCellit™ workflow management and monitoring software system, a decentralized, functionally closed, automated manufacturing platform for cell therapies (using Lonza’s Cocoon®) and a proprietary quality control testing and release strategy. About GalapagosWe are a global biotechnology company with operations in Europe and the US dedicated to developing transformational medicines for more years of life and quality of life. Focusing on high unmet medical needs, we synergize the most compelling science, technology, and collaborative approaches to create a deep pipeline of best-in-class small molecules, CAR-T therapies, and biologics in oncology and immunology. With capabilities from lab to patient, including a decentralized, point-of-care CAR-T manufacturing network, we are committed to challenging the status quo and delivering results for our patients, employees and shareholders. For additional information, please visit www.glpg.com or follow us on LinkedIn or X (formerly Twitter). Contact Media inquiries:Marieke Vermeersch +32 479 490 603 media@glpg.com Investor inquiries:Sofie Van Gijsel +1 781 296 1143ir@glpg.comSandra Cauwenberghs ir@glpg.com Forward-looking statements This press release includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended. These statements are often, but not always, made through the use of words or phrases such as “will,” “aim,” “goal,” and any similar expressions. Forward-looking statements contained in this release include, but are not limited to, statements regarding Galapagos’ collaboration with Thermo Fisher. Forward-looking statements may involve unknown and known risks, uncertainties and other factors which might cause actual results to differ materially from those referred to in the forward-looking statements and, therefore, the reader should not place undue reliance on them. These risks, uncertainties and other factors include, without limitation, the risk that Galapagos’ expectations regarding the collaboration with Thermo Fisher, including the potential benefits of such [collaboration], may be incorrect, the inherent uncertainties associated with competitive developments, and regulatory approval requirements, risks associated with Galapagos' reliance on collaborations with third parties (including its collaboration partner Lonza), as well as those risks and uncertainties identified in Galapagos’ Annual Report on Form 20-F for the year ended 31 December 2022 and its subsequent filings with the Securities and Exchange Commission. All statements other than statements of historical fact are statements that could be deemed forward-looking statements. The forward-looking statements contained herein are based on Galapagos management’s current expectations and beliefs and speak only as of the date hereof, and Galapagos makes no commitment to update or publicly release any revisions to forward-looking statements in order to reflect new information or subsequent events, circumstances or changes in expectations, unless required by law or regulation. 1 Throughout this press release, ‘Dr. Paul Stoffels’ should be read as ‘Dr. Paul Stoffels, acting via Stoffels IMC BV’ Attachment Galapagos enters into strategic collaboration agreement with Thermo Fisher Scientific to further expand its decentralized CAR-T manufacturing network in the U.S.

Transaction expected to close in the first quarter of 2024, subject to customary closing conditionsMichele Manto, Galapagos’ Chief Commercial Officer, to join Alfasigma Mechelen, Belgium; 02 January 2024, 07:00 CET; Galapagos NV (Euronext & NASDAQ: GLPG) and Alfasigma S.p.A. today announced that they have signed an agreement to transfer Galapagos’ Jyseleca® (filgotinib) business to Alfasigma, marking a significant milestone in Galapagos’ transformation into an innovative biotechnology company with a best-in-class research and development pipeline aimed at addressing high unmet patient needs in immunology and oncology. The agreement follows the signing of a letter of intent as announced on 30 October 2023. Subject to, and as part of the closing of the transaction, Michele Manto, Galapagos’ Chief Commercial Officer, will join Alfasigma, and has resigned from his position as Chief Commercial Officer and Executive Committee member at Galapagos at the end of December 2023. “Michele has been instrumental in the execution of our commercial strategy and has been a key contributor to the development and success of Jyseleca®, making a difference to over 20,000 patients across Europe,” said Dr. Paul Stoffels1, CEO and Chairman of Galapagos. “We would like to thank Michele for his contributions to Galapagos and are confident that his planned transition to Alfasigma will ensure business continuity through his close collaboration with the Jyseleca® team. We are very pleased that the agreement with Alfasigma will enable the continued availability of Jyseleca® to patients, while supporting a promising future for the Jyseleca® business and its dedicated employees.” In connection with the transaction, Galapagos expects to realize substantial savings ranging between €150 million and €200 million and will prioritize investments in its existing technology platforms of small molecules, CAR-T cell therapies and biologics, as well as the scale-up of its innovative decentralized CAR-T manufacturing network. In addition, Galapagos plans to invest in licensing and acquisition opportunities ranging from late preclinical to mid-stage clinical assets in its strategic therapeutic areas to drive value across its pipeline. As previously announced, under the terms of the agreement, Alfasigma will acquire the entire Jyseleca® business, including the European and UK Marketing Authorizations, the commercial, medical affairs and development activities for Jyseleca® and approximately 400 Galapagos positions in 14 European countries. Galapagos will receive a €50 million upfront payment, potential sales-based milestone payments totaling €120 million and mid-single to mid-double-digit royalties on European sales. Galapagos will contribute up to €40 million to Alfasigma by June 2025 for Jyseleca® related development activities. About filgotinib Filgotinib is marketed as Jyseleca® in Europe and Japan for the treatment of adults with moderate to severe active RA who have responded inadequately or are intolerant to one or more disease modifying anti-rheumatic drugs. Filgotinib is also marketed as Jyseleca® in Europe and Japan for the treatment of adult patients with moderate to severe active ulcerative colitis (UC) who have had an inadequate response with, lost response to, or were intolerant to either conventional therapy or a biologic agent. Jyseleca® 100mg and 200mg are registered in the above-mentioned territories. The European Summary of Product Characteristics for filgotinib, which includes contraindications and special warnings and precautions, is available at www.ema.europa.eu. The Great Britain Summary of Product Characteristics for filgotinib can be found at www.medicines.org.uk/emc and the Northern Ireland Summary of Product Characteristics for filgotinib can be found at www.emcmedicines.com/en-GB/northernireland, respectively. The interview form from the Japanese Ministry of Health, Labour and Welfare is available at www.info.pmda.go.jp. Jyseleca® is a trademark of Galapagos NV and Gilead Sciences, Inc. or its related companies. Except for filgotinib’s approval as Jyseleca® for the treatment of moderate to severe active RA and UC by the relevant regulatory authorities in the European Union, Great Britain, and Japan, our drug candidates are investigational; their efficacy and safety have not been fully evaluated by any regulatory authority. About GalapagosWe are a global biotechnology company with operations in Europe and the US dedicated to developing transformational medicines for more years of life and quality of life. Focusing on high unmet medical needs, we synergize the most compelling science, technology, and collaborative approaches to create a deep pipeline of best-in-class small molecules, CAR-T therapies, and biologics in oncology and immunology. With capabilities from lab to patient, including a decentralized, point-of-care CAR-T manufacturing network, we are committed to challenging the status quo and delivering results for our patients, employees, and shareholders. For additional information, please visit www.glpg.com or follow us on LinkedIn or X (formerly Twitter). About AlfasigmaAlfasigma is one of Italy's leading pharmaceutical companies with a strong international positioning. The Group has a worldwide presence in over 100 countries where about 3000 people work in research, development, production and distribution. In Italy, Alfasigma is a leader in the prescription products market where, in addition to its strong focus on gastro-intestinal products, it is present in several primary care therapeutic areas. It is popular with the consumer public for a number of nutraceuticals & food supplements that respond to different needs, and that are well known and deeply rooted in the Italian families’ experience. Its historical headquarters is in Bologna, to which is added Milan, while the production sites are: in Italy, in Pomezia (RM), Alanno (PE), Sermoneta (LT) and Trezzano Rosa (MI) and abroad in Tortosa in Spain and in Shreveport (Louisiana) in the United States. The R&D laboratories are in Pomezia and in the Parco Scientifico Tecnologico Kilometro Rosso in Bergamo. Alfasigma's mission is to improve people's health and quality of life by offering caregivers and healthcare personnel therapeutic solutions according to the highest standards of quality and safety. Contact Media inquiries: Marieke Vermeersch  +32 479 490 603  media@glpg.com   Investor inquiries: Sofie Van Gijsel  +1 781 296 1143 ir@glpg.com Sandra Cauwenberghs  ir@glpg.com Forward-looking statements This press release includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including statements related to the contemplated transaction between Galapagos and Alfasigma, including potential payments and royalties and the expected timing for closing of the transaction, statements related to the expected cost savings and efficiencies resulting from the foregoing, statements related to Galapagos’ anticipated future research and development and business development activities, and statements regarding the announced changes in our Executive Committee and key personnel. Forward-looking statements are subject to risks, uncertainties and other factors that could cause actual results to differ materially from those referred to in the forward-looking statements and, therefore, the reader should not place undue reliance on them. These risks, uncertainties and other factors include, without limitation, the risk that the contemplated transaction between Galapagos and Alfasigma may be delayed or never consummated, the risk that the expected cost savings and efficiencies described in this press release will not be realized, the risk that Galapagos will not successfully achieve its anticipated future research and development and business development activities, the possibility that Galapagos will encounter challenges retaining or attracting talent, that our leadership transition may be disruptive to our business operations, our ability to effectively transfer knowledge during this period of transition, as well as those risks and uncertainties identified in our Annual Report on Form 20-F for the year ended 31 December 2022 and our subsequent filings with the Securities and Exchange Commission. All statements other than statements of historical fact are statements that could be deemed forward-looking statements. The forward-looking statements contained herein are based on management’s current expectations and beliefs and speak only as of the date hereof, and Galapagos makes no commitment to update or publicly release any revisions to forward-looking statements in order to reflect new information or subsequent events, circumstances or changes in expectations. 1 Throughout this press release, ‘Dr. Paul Stoffels’ should be read as ‘Dr. Paul Stoffels, acting via Stoffels IMC BV’ Attachment GLPG Alfasigma Agreement Press Release_FINAL_ENG