University Hospital Mannheim

Houston, Texas and Tuebingen, Germany, October 4, 2024 – Immatics N.V. (NASDAQ: IMTX, “Immatics” or the “Company”), a clinical-stage biopharmaceutical company active in the discovery and development of T cell-redirecting cancer immunotherapies, today announced upcoming oral and poster presentations at the 39th Annual Meeting of the Society for Immunotherapy of Cancer in Houston, Texas from November 6 - 10, 2024. Full abstracts will be available on November 5, 2024, at 9:00 am EST in the JITC Supplement. Oral Presentations Date / Time: November 8, 2024 / 3:50 – 5:25 pm Central Standard TimeSession: Oral Abstract Session 1Abstract Number: 687Title: ACTengine IMA203 TCR-T targeting PRAME shows deep and durable anti-tumor activity in heavily pretreated solid cancer patients Presenter: Martin Wermke, M.D. (University Hospital Dresden, Germany) Date / Time: November 9, 2024 / 12:30 PM - 1:30 pm Central Standard TimeSession: Rapid Oral - Clinical 2Abstract Number: 661Title: Enhanced pharmacology data of next-generation IMA203CD8 TCR-T monotherapy targeting PRAMEPresenter: Dejka M. Araujo, M.D. (MD Anderson Cancer Center, Houston, Texas, USA) Poster Presentations Date: November 8, 2024 Poster Number: 355 Title: An approach to bridging starting materials to monitor T cell persistence in adoptive T cell therapyPresenter: Jourdan Andersson, Ph.D. (Immatics) Date: November 9, 2024 Poster Number: 226 Title: An effective donor screening program for manufacturing of allogeneic γδ T cell productsPresenter: Inbar Azoulay Alfaguter, Ph.D. (Immatics) Date: November 9, 2024 Poster Number: 228 Title: Optimizing and streamlining the manufacturing of Vγ9Vδ2 γδ T cells for allogeneic therapyPresenter: Pooja Mehta, Ph.D. (Immatics) Date: November 9, 2024 Abstract Number: 360 Title: Combination of a TCR-engineered autologous PRAME-targeting T cell therapy with a PRAME-encoding mRNA for the treatment of solid tumorsPresenter: Fabian Brunk, Ph.D. (Immatics) Date: November 9, 2024 Poster Number: 372 Title: TCR-engineered T cells exhibit enhanced persistence and serial killing ability when armored with membrane-bound IL-15Presenter: Justin Gunesch, Ph.D. (Immatics) About IMA203 and Target PRAMEACTengine® IMA203 T cells are directed against an HLA-A*02-presented peptide derived from preferentially expressed antigen in melanoma (PRAME), a protein frequently expressed in a large variety of solid cancers, thereby supporting the program’s potential to address a broad cancer patient population. Immatics’ PRAME peptide is present at a high copy number per tumor cell and is homogeneously and specifically expressed in tumor tissue. The peptide has been identified and characterized by Immatics’ proprietary mass spectrometry-based target discovery platform, XPRESIDENT®. Through its proprietary TCR discovery and engineering platform XCEPTOR®, Immatics has generated a highly specific T cell receptor (TCR) against this target for its TCR-based cell therapy approach, ACTengine® IMA203. ACTengine® IMA203 TCR-T is currently being evaluated in Phase 1 IMA203 monotherapy, and IMA203CD8 (GEN2) monotherapy, where IMA203 engineered T cells are co-transduced with a CD8αβ co-receptor. About ImmaticsImmatics combines the discovery of true targets for cancer immunotherapies with the development of the right T cell receptors with the goal of enabling a robust and specific T cell response against these targets. This deep know-how is the foundation for our pipeline of Adoptive Cell Therapies and TCR Bispecifics as well as our partnerships with global leaders in the pharmaceutical industry. We are committed to delivering the power of T cells and to unlocking new avenues for patients in their fight against cancer. Immatics intends to use its website www.immatics.com as a means of disclosing material non-public information. For regular updates you can also follow us on X, Instagram and LinkedIn. For more information, please contact: Media Trophic Communications Phone: +49 171 3512733 immatics@trophic.eu Immatics N.V. Jordan Silverstein Head of Strategy Phone: +1 346 319-3325 InvestorRelations@immatics.com Attachment PDF Version

Houston, Texas and Tuebingen, Germany, September 06, 2024 – Immatics N.V. (NASDAQ: IMTX, “Immatics” or the “Company”), a clinical-stage biopharmaceutical company active in the discovery and development of T cell-redirecting cancer immunotherapies, today announced that updated clinical data on its lead cell therapy candidate, ACTengine® IMA203 targeting PRAME, will be presented at the 21st International Congress of the Society for Melanoma Research. Oral presentation Date / Time: October 11, 2024 / 8:00 – 8:20 am Central Daylight TimeSession: Plenary Session 1 – Developmental Immunotherapy (Cellular Immunotherapy, Vaccines, and New Checkpoints)Title: ACTengine IMA203 TCR-T targeting PRAME in PD1-refractory metastatic melanoma – Clinical UpdatePresenter: Martin Wermke, M.D. (University Hospital Dresden, Germany) About IMA203 ACTengine® IMA203 T cells is an autologous T cell product with a genetically modified, pairing-enhanced TCR directed against an HLA-A*02-presented peptide derived from preferentially expressed antigen in melanoma (PRAME). This peptide is frequently expressed in a large variety of solid cancers, thereby supporting the program’s potential to address a broad cancer patient population. Immatics’ PRAME peptide is present at a high copy number per tumor cell and is homogeneously and specifically expressed in tumor tissue. The peptide has been identified and characterized by Immatics’ proprietary mass spectrometry-based target discovery platform, XPRESIDENT®. Through its proprietary TCR discovery and engineering platform XCEPTOR®, Immatics has generated a highly specific T cell receptor (TCR) against this target for its TCR-based cell therapy approach, ACTengine® IMA203. ACTengine® IMA203 TCR-T is currently being evaluated in a Phase 1 trial as IMA203 monotherapy, and as a second-generation IMA203CD8 (GEN2) monotherapy, where IMA203-engineered T cells are co-transduced with a CD8αβ co-receptor, thereby leveraging the power of both CD4+ and CD8+ T cells. As previously reported, IMA203 in combination with an immune checkpoint inhibitor has been deprioritized. About ImmaticsImmatics combines the discovery of true targets for cancer immunotherapies with the development of the right T cell receptors with the goal of enabling a robust and specific T cell response against these targets. This deep know-how is the foundation for our pipeline of Adoptive Cell Therapies and TCR Bispecifics as well as our partnerships with global leaders in the pharmaceutical industry. We are committed to delivering the power of T cells and to unlocking new avenues for patients in their fight against cancer. Immatics intends to use its website www.immatics.com as a means of disclosing material non-public information. For regular updates you can also follow us on X, Instagram and LinkedIn. For more information, please contact: Media Trophic Communications Phone: +49 171 3512733 immatics@trophic.eu Immatics N.V. Jordan Silverstein Head of Strategy Phone: +1 346 319-3325 InvestorRelations@immatics.com Attachment PDF Version

Houston, Texas and Tuebingen, Germany, July 18, 2024 – Immatics N.V. (NASDAQ: IMTX, “Immatics”), a clinical-stage biopharmaceutical company active in the discovery and development of T cell-redirecting cancer immunotherapies, today announced that the first proof-of-concept clinical data for its next-generation, half-life extended TCR Bispecific molecule, TCER® IMA401 (MAGEA4/8), will be presented during an oral presentation at the European Society for Medical Oncology (ESMO) Congress 2024 on Monday, September 16, 2024 at 11:25 CEST. Full abstracts will be available on the ESMO website on Monday, September 9, 2024, at 00:05 CEST. Oral presentation Date / Time: September 16, 2024 / 11:25 CESTSession: Investigational ImmunotherapyTitle: Initial safety, pharmacokinetics, and anti-tumor activity data of TCER IMA401, a MAGEA4/8-directed half-life extended TCR Bispecific, in Phase 1 dose escalationPresenting author: Martin Wermke, MD (University Hospital Dresden, Germany)Room: Granada Auditorium - Hall 6 About IMA401 IMA401 is Immatics’ most advanced TCER® molecule that targets an HLA-A*02-presented (human leukocyte antigen) peptide derived from two different cancer-associated proteins, melanoma-associated antigen 4 and/or 8 (“MAGEA4/8”). The MAGEA4/8 peptide has been identified and validated by Immatics’ proprietary mass spectrometry-based target discovery platform XPRESIDENT® and is presented at a 5-fold higher copy number per tumor cell than the MAGEA4 peptide targeted in other clinical trials. Following preclinical proof-of-concept data, including complete remissions of transplanted human-derived tumors in xenograft mouse models, the Phase 1 trial investigates IMA401 in patients with tumors of high MAGEA4/8 prevalence, such as squamous non-small cell lung carcinoma (sqNSCLC), small cell lung cancer (SCLC), head and neck squamous cell carcinoma (HNSCC), bladder, uterine, esophageal and ovarian carcinomas, as well as melanoma, sarcoma subtypes and other solid cancer types. About TCER® Immatics’ next-generation half-life extended TCER® molecules are antibody-like “off-the-shelf” biologics that leverage the body’s immune system by redirecting and activating T cells towards cancer cells expressing a specific tumor target. The design of the TCER® molecules enables the activation of any T cell in the body to attack the tumor, regardless of the T cells’ intrinsic specificity. Immatics proprietary biologics are engineered with two binding regions: a TCR domain and a T cell recruiter domain. The TCER® format is designed to maximize efficacy while minimizing toxicities in patients. It contains a high-affinity TCR domain that is designed to bind specifically to the cancer target peptide on the cell surface presented by an HLA molecule. The antibody-derived, low-affinity T cell recruiter domain is directed against the TCR/CD3 complex and recruits a patient’s T cells to the tumor to attack the cancer cells. With a low-affinity recruiter aiming for optimized biodistribution and enrichment of the molecule at the tumor site instead of the periphery, TCER® are engineered to reduce the occurrence of immune-related adverse events, such as cytokine release syndrome. In addition, the TCER® format consists of an Fc-part conferring half-life extension, stability, and manufacturability. TCER® are “off-the-shelf” biologics and thus immediately available for patient treatment. They can be distributed through standard pharmaceutical supply chains and provide the opportunity to reach a large patient population without the need for specialized medical centers. About ImmaticsImmatics combines the discovery of true targets for cancer immunotherapies with the development of the right T cell receptors with the goal of enabling a robust and specific T cell response against these targets. This deep know-how is the foundation for our pipeline of Adoptive Cell Therapies and TCR Bispecifics as well as our partnerships with global leaders in the pharmaceutical industry. We are committed to delivering the power of T cells and to unlocking new avenues for patients in their fight against cancer. Immatics intends to use its website www.immatics.com as a means of disclosing material non-public information. For regular updates you can also follow us on X, Instagram and LinkedIn. For more information, please contact: Media Trophic Communications Phone: +49 171 3512733 immatics@trophic.eu Immatics N.V. Jordan Silverstein Head of Strategy Phone: +1 346 319-3325 InvestorRelations@immatics.com Attachment PDF Version