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Immutep Announce Japanese Patent Grant for LAG525 Antibody

SYDNEY, AUSTRALIA – 17 September 2019 Immutep Limited (ASX: IMM; NASDAQ: IMMP) ("Immutep” or “the Company”) is pleased to announce the grant of patent no. 6576962 entitled “Antibody molecules to LAG-3 and uses thereof” by the Japanese Patent Office.

The claims of the patent are directed to LAG525, and to the use of LAG525 in the treatment of cancer and infectious disease. LAG525 is a humanised form of Immutep’s IMP701 antibody that
was originally developed by Immutep S.A. (now Immutep S.A.S.), a wholly owned subsidiary of the Company. The patent is co-owned by Novartis AG and Immutep S.A.S. and will expire on 13 March
2035.

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