Press Release

• ACTengine® IMA203: First patients treated at RP2D in Phase 1b cohort A with IMA203 monotherapy as well as Phase 1b cohort B with IMA203/checkpoint inhibitor combination. IND for Phase 1b cohort C with 2^nd-generation IMA203CD8 granted
• Phase 1 clinical trial initiated with the first T cell engaging receptor TCER® IMA401 targeting MAGEA4/8 for patients with recurrent and/or refractory solid tumors
• New multi-program collaboration with Bristol Myers Squibb to develop allogeneic TCR-T/CAR-T programs; agreement includes $60 million upfront payment to Immatics and up to $700 million per program in milestone payments as well as tiered royalties
• Bristol Myers Squibb and Immatics are also including an additional target to their autologous TCR-T collaboration signed in 2019, Immatics to receive an upfront payment of $20 million and eligibility for milestone payments and royalties
• Cash and cash equivalents as well as other financial assets of $280.5 million¹ (€252.7 million) as of March 31, 2022. With the upfront payment from the new collaboration agreement with Bristol Myers Squibb, cash reach into 2H 2024

Tuebingen, Germany and Houston, Texas, June 2, 2022 – Immatics N.V. (NASDAQ: IMTX, “Immatics”), a clinical-stage biopharmaceutical company active in the discovery and development of T cell-redirecting cancer immunotherapies, today reported financial results and provided a business update for the quarter ended March 31, 2022.

Harpreet Singh, Ph.D., CEO and Co-Founder of Immatics commented, “Immatics has continued to build positive momentum in the first quarter of 2022. We have started treatment in two of three Phase 1b cohorts advancing our IMA203 TCR-T studies targeting PRAME. We have reached a key milestone by entering the first-in-human trial with our first TCR Bispecifics candidate directed against MAGEA4/A8 and have set the stage for further advancing our TCER® pipeline. We have also further strengthened our pipeline portfolio to address the needs of cancer patients by joining forces with Bristol Myers Squibb to develop multiple off-the-shelf TCR-T and/or CAR-T programs based on our allogeneic gamma-delta cell therapy platform ACTallo®.”

First Quarter 2022 and Subsequent Company Progress

Adoptive Cell Therapy Programs

• ACTallo® and Autologous TCR-T – Immatics entered into a strategic multi-program collaboration with Bristol Myers Squibb to develop allogeneic TCR-T/CAR-T programs combining Immatics’ proprietary gamma-delta T cell-derived, allogeneic Adoptive Cell Therapy (ACT) platform ACTallo®, with a suite of next-generation technologies developed by Bristol Myers Squibb. Immatics will receive an upfront payment of $60 million and is eligible for up to $700 million per Bristol Myers Squibb program through development, regulatory and commercial milestone payments and tiered royalty payments up to low double-digit percentages on net sales. The new collaboration covers development and commercialization of two programs for Bristol Myers Squibb. Both companies have an option to develop up to four additional programs each. In addition, Bristol Myers Squibb and Immatics will expand their autologous T cell receptor-based therapy (TCR-T) collaboration signed in 2019 by including one additional TCR-T target discovered by Immatics. Immatics will receive a payment of $20 million and eligibility for milestone payments as well as tiered royalties.
   
• ACTengine® IMA203 (PRAME) – Update on Phase 1b expansion cohorts:
   
  • Cohort A – IMA203 as monotherapy: First patient treated at provisional Recommended Phase 2 Dose (RP2D) in March
  • Cohort B – IMA203 in combination with an immune checkpoint inhibitor: First patient treated at RP2D in May
  • Cohort C – IMA203CD8, a 2^nd generation monotherapy where IMA203 is co-transduced with a CD8 co-receptor: IND granted by FDA, patient enrollment planned for Q2 2022

The next data read-out for the IMA203 monotherapy cohort is planned for 2H 2022. An initial data read-out for the IMA203/immune checkpoint inhibitor combination therapy cohort and the IMA203CD8 cohort is planned for YE2022.

• ACTengine® IMA201 (MAGEA4/A8) – Dose escalation is ongoing, target dose level to commence.
   
• ACTengine® IMA202 (MAGEA1) – A preliminary interim analysis from 16 patients treated in the dose escalation cohort demonstrated a favorable tolerability profile for IMA202. Signs of clinical and biological activity were observed, but were not reaching the threshold of objective responses as per RECIST1.1. Treatment-emergent adverse events for IMA202 were transient and manageable. No dose-limiting toxicities or signs of auto-immune toxicities were observed. 11 out of 16 patients (69%) showed disease control and 5 out of 16 patients (31%) showed tumor shrinkage. Maximum change of target lesion was minus 35%. Following final evaluation, Immatics plans to present the full data set at a later timepoint. Immatics management has decided not to further progress the IMA202 program into Phase 1b dose expansion and is evaluating development options and partnering opportunities for the program and the target MAGEA1.
   

TCR Bispecifics Programs

• TCER® IMA401 (MAGEA4/8) – Immatics initiated a Phase 1 clinical trial with its T cell engaging receptor (TCER®) IMA401 for patients with recurrent and/or refractory solid tumors. IMA401 is the most advanced TCER® candidate and targets an HLA-A*02-presented peptide derived from both MAGEA4 and/or MAGEA8. TCER® IMA401 is being developed in collaboration with Bristol Myers Squibb. Immatics is responsible for conducting the Phase 1 clinical trial with approximately 50 patients at up to 15 centers in Germany.

• TCER® IMA402 (PRAME) – Manufacturing of the clinical batch is on track for the 2H 2022 and initiation of the Phase 1 trial is planned in 2023.
   

Corporate Developments

Board of Directors Update

• Nancy Valente, M.D., was appointed to Immatics’ Board of Directors in March 2022 and will be nominated for election at Immatics’ Annual General Meeting in June 2022. She brings over 20 years of experience in oncology and hematology drug development. Additional information on all members of Immatics’ Board of Directors can be found on the Immatics website.
   

First Quarter 2022 Financial Results

Cash Position: Cash and cash equivalents as well as other financial assets total €252.7 million ($280.5 million¹) as of March 31, 2022 compared to €145.1 million ($161.1 million¹) as of December 31, 2021. The increase is mainly due to the receipt of the upfront payment in connection with the collaboration agreement with Bristol Myers Squibb on IMA401, partly offset by the financing of our ongoing research and development activities. This does not include $60 million cash to be received from the collaboration agreement signed with Bristol Myers Squibb in May 2022 or the $20 million cash to be received as a result of Bristol Myers Squibb’s decision to add one additional autologous TCR-T target as part of a 2019 collaboration agreement. With the addition of these upfront payments, the Company projects a cash runway into 2H 2024.

Revenue: Total revenue, consisting of revenue from collaboration agreements, was €102.9 million ($114.2 million¹) for the three months ended March 31, 2022, compared to €7.4 million ($8.2 million¹) for the three months ended March 31, 2021. The increase is mainly related to the recognition of revenue for the license portion of the collaboration agreement with Bristol Myers Squibb on IMA401.

Research and Development Expenses: R&D expenses were €25.1 million ($27.9 million¹) for the three months ended March 31, 2022, compared to €23.0 million ($25.5 million¹) for the three months ended March 31, 2021.

General and Administrative Expenses: G&A expenses were €9.3 million ($10.3 million¹) for the three months ended March 31, 2022, compared to €8.4 million ($9.3 million¹) for the three months ended March 31, 2021.

Net Income/Loss: Net income was €85.7 million ($95.1 million¹) for the three months ended March 31, 2022, compared to a net loss of €22.8 million ($25.3 million¹) for the three months ended March 31, 2021. The increase mainly resulted from a one-time revenue in connection with the partial recognition of the upfront payment from the collaboration with Bristol Myers Squibb on IMA401.

Full financial statements can be found in the current report on Form 6-K filed with the Securities and Exchange Commission (SEC) and published on the SEC website under www.sec.gov.

¹ All amounts translated using the exchange rate published by the European Central Bank in effect as of March 31, 2022 (1 EUR = 1.1101 USD).

Upcoming Investor Conferences

• Jefferies Global Healthcare Conference (in-person) New York, NY – June 8-10, 2022
• Jefferies London Healthcare Conference, London, U.K. – November 15-17, 2022

To see the full list of events and presentations, visit www.investors.immatics.com/events-presentations.

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About Immatics
Immatics 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.

For regular updates about Immatics, visit www.immatics.com. You can also follow us on Instagram, Twitter and LinkedIn.

Forward-Looking Statements:
Certain statements in this press release may be considered forward-looking statements. Forward-looking statements generally relate to future events or Immatics’ future financial or operating performance. For example, statements concerning the timing of product candidates and Immatics’ focus on partnerships to advance its strategy are forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as “may”, “should”, “expect”, “intend”, “will”, “estimate”, “anticipate”, “believe”, “predict”, “potential” or “continue”, or the negatives of these terms or variations of them or similar terminology. Such forward-looking statements are subject to risks, uncertainties, and other factors which could cause actual results to differ materially from those expressed or implied by such forward looking statements. These forward-looking statements are based upon estimates and assumptions that, while considered reasonable by Immatics and its management, are inherently uncertain. New risks and uncertainties may emerge from time to time, and it is not possible to predict all risks and uncertainties. Factors that may cause actual results to differ materially from current expectations include, but are not limited to, various factors beyond management's control including general economic conditions and other risks, uncertainties and factors set forth in filings with the SEC. Nothing in this presentation should be regarded as a representation by any person that the forward-looking statements set forth herein will be achieved or that any of the contemplated results of such forward-looking statements will be achieved. You should not place undue reliance on forward-looking statements, which speak only as of the date they are made. Immatics undertakes no duty to update these forward-looking statements. All the scientific and clinical data presented within this press release are – by definition prior to completion of the clinical trial and a clinical study report – preliminary in nature and subject to further quality checks including customary source data verification.

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