<img src="https://ml.globenewswire.com/Resource/Download/a84ce25b-a774-4635-9b79-d45241f5decc?size=2" nborder="0" align="left" hspace="5" vspace="5" title="Cellectis Logo.png" alt="Cellectis Inc."/>NEW YORK, May 20, 2026 (GLOBE NEWSWIRE) -- Cellectis (the “Company”) (Euronext Growth: ALCLS- NASDAQ: CLLS), a clinical-stage biotechnology company using its pioneering gene-editing platform to develop life-saving cell and gene therapies, announced today that it will hold its annual general meeting on June 25, 2026 at 2:30 p.m. CET at the Biopark auditorium, 11 rue Watt, 4th floor, 75013 Paris, France. The notice of meeting is available on the Cellectis website: <a href="https://www.globenewswire.com/Tracker?data=hj9hMQEBksutEg_3kdSbjzy-NzYUceiOVsRvXkyQ4Zy8dDgI8t4Vcq1Mdw7PvvZa6Wwa_i1ZHLazeD8zQJDFf75mpiGAOGQcBA8lrhJOdDdfqupjtE1bSOtCTO23CJAPG8tPVbpEWeXrx5KA0lE1KST3fJptiYKBahziQ6TafhNEk2gmoEMvXe3tTtwnvcT3" rel="nofollow" target="_blank" title="">https://www.cellectis.com/en/investors/general-meetings/</a> About Cellectis      Cellectis is a clinical-stage biotechnology company using its pioneering gene-editing platform to develop life-saving cell and gene therapies. The company utilizes an allogeneic approach for CAR T immunotherapies in oncology, pioneering the concept of off-the-shelf and ready-to-use gene-edited CAR T-cells to treat cancer patients, and a platform to develop gene therapies in other therapeutic indications. With its in-house manufacturing capabilities, Cellectis is one of the few end-to-end gene editing companies that controls the cell and gene therapy value chain from start to finish.           Cellectis’ headquarters are in Paris, France, with locations in New York and Raleigh, NC. Cellectis is listed on the Nasdaq Global Market (ticker: CLLS) and on Euronext Growth (ticker: ALCLS). To find out more, visit <a href="https://www.globenewswire.com/Tracker?data=l4bvuh5aIWuL8vEX46UAzAWo46aOYHJFbAv7aHZk2eAeFtYWLVySaT8YzTAljn0xEgsDK5Y0RBsakWe27ShWy5eJasY4Huyhj_Tb0VrNZek=" rel="nofollow" target="_blank" title="www.cellectis.com">www.cellectis.com</a> and follow Cellectis on <a href="https://www.globenewswire.com/Tracker?data=O-drREOzm3u8kE-T_oxOpVvJgDu641-8VLZ2P9TWHMNErxuUbTF0BOoiYW9PqQ5ZnlFk1d1dB1CX8LUgTGfQK42xFJS5o7dGhSbT3EOnUanXrLFyX97wlmTx8Fs8yrxT" rel="nofollow" target="_blank" title="LinkedIn">LinkedIn</a> and <a href="https://www.globenewswire.com/Tracker?data=y2XqZtXm5DsteqVtOo7Qb4xNNzGoopq6xJ3IPz0rSLOa9_SueHyyhuSGFWM_IYjxHMLrnWqk0udENFi5A0_7rA==" rel="nofollow" target="_blank" title="X">X</a>.   For further information on Cellectis, please contact:                Media contacts:               Pascalyne Wilson, Director, Communications, + 33 (0)7 76 99 14 33, <a href="https://www.globenewswire.com/Tracker?data=zOYwBXFeoaZEDhKkyP1tGbQS7J1rkptnAEEynMkqImRjfQoT0YG38ba35zcKFYF_BngG7Jma3pWgfAskidTf-rFC37lR3N8mwi60AHdoTgE=" rel="nofollow" target="_blank" title="media@cellectis.com">media@cellectis.com</a> Patricia Sosa Navarro, Chief of Staff to the CEO, +33 (0)7 76 77 46 93       Investor Relations contact:            Arthur Stril, Chief Financial Officer &amp; Chief Business Officer, <a href="https://www.globenewswire.com/Tracker?data=BuQ-BMpnIjqXNE0WtiWranz4fK4x-Fr9bjr0J22Ju78_66mVRyFjJrNyh9YJ00SKc56j3ZJvcEMZnO3_OJzW5-8a0fpmLzlxl8lMdurEri8=" rel="nofollow" target="_blank" title="investors@cellectis.com">investors@cellectis.com</a> Attachment <ul id="gnw_attachments_section-items"><li><a href="https://www.globenewswire.com/Tracker?data=E4EGHZKQiHbZOaw-BtkKr6wmXQLDH44lArhSAMg7IvxblUI6rOv5xz4IctHFry-0_I4BdpIMaYF_nXSRF5-z7Glr81lEqRiTJfZXOxyi__6cjrcjV76gsd4PzspkLJ3b3g_7pzIdCjUy2WhyzZ67RrdEtwwIK6PjmotwKB9smNXNC_4DpU54fM5d4YT1BtDocB4Ll3sWlSXqjrWyekhsEQ==" rel="nofollow" target="_blank" title="Shareholder's meeting announcement PR_ENGLISH.pdf">Shareholder's meeting announcement PR_ENGLISH.pdf</a></li></ul> <img alt="" src='https://ml.globenewswire.com/media/MGQzZTNkODYtZGUxOS00YTI2LTk0ZmQtY2I4ZWUwNTk0OTEwLTEwNjE0NDgtMjAyNi0wNS0yMC1lbg==/tiny/Cellectis-Inc-.png' referrerpolicy='no-referrer-when-downgrade' />

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Cellectis’ Annual Shareholders General Meeting to be Held on June 25, 2026

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