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Appendix 3Y Change of Director's Interest Notice + See chapter 19 for defined terms. 01/01/2011 Appendix 3Y Page 1 Rule 3.19A.2 Appendix 3Y Change of Director's Interest Notice Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX's property and may be made public. Introduced 30/09/01 Amended 01/01/11 Name of entity Mesoblast Limited ABN 68 109 431 870 We (the entity) give ASX the following information under listing rule 3.19A.2 and as agent for the director for the purposes of section 205G of the Corporations Act. Name of Director Dr Silviu Itescu Date of last notice 16 January 2025 Part 1 - Change of director's relevant interests in securities In the case of a trust, this includes interests in the trust made available by the responsible entity of the trust Note: In the case of a company, interests which come within paragraph (i) of the definition of "notifiable interest of a director" should be disclosed in this part. Direct or indirect interest Direct interest Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest. Not applicable Date of change 1 April 2025 No. of securities held prior to change 78,958,928 ordinary shares, held as follows: Direct: 67,756,838 ordinary shares; and Indirect: 11,202,090 ordinary shares 13,341,558 options Class Options Number acquired 3,108,000 options Number disposed Not applicable Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation Nil Exhibit 99.1
Appendix 3Y Change of Director's Interest Notice + See chapter 19 for defined terms. Appendix 3Y Page 2 01/01/2011 No. of securities held after change 78,958,928 ordinary shares, held as follows: Direct: 67,756,838 ordinary shares; and Indirect: 11,202,090 ordinary shares 16,449,558 options Nature of change Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy-back Issue of options with approval by shareholders at the 2024 AGM Part 2 - Change of director's interests in contracts Note: In the case of a company, interests which come within paragraph (ii) of the definition of "notifiable interest of a director" should be disclosed in this part. Detail of contract Not applicable Nature of interest Not applicable Name of registered holder (if issued securities) Not applicable Date of change Not applicable No. and class of securities to which interest related prior to change Note: Details are only required for a contract in relation to which the interest has changed Not applicable Interest acquired Not applicable Interest disposed Not applicable Value/Consideration Note: If consideration is non-cash, provide details and an estimated valuation Not applicable Interest after change Not applicable Part 3 - +Closed period Were the interests in the securities or contracts detailed above traded during a +closed period where prior written clearance was required? No If so, was prior written clearance provided to allow the trade to proceed during this period? Not applicable
Appendix 3Y Change of Director's Interest Notice + See chapter 19 for defined terms. 01/01/2011 Appendix 3Y Page 3 If prior written clearance was provided, on what date was this provided? Not applicable
Appendix 3Y Change of Director's Interest Notice + See chapter 19 for defined terms. 01/01/2011 Appendix 3Y Page 1 Rule 3.19A.2 Appendix 3Y Change of Director's Interest Notice Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX's property and may be made public. Introduced 30/09/01 Amended 01/01/11 Name of entity Mesoblast Limited ABN 68 109 431 870 We (the entity) give ASX the following information under listing rule 3.19A.2 and as agent for the director for the purposes of section 205G of the Corporations Act. Name of Director Dr Eric Rose Date of last notice 7 March 2025 Part 1 - Change of director's relevant interests in securities In the case of a trust, this includes interests in the trust made available by the responsible entity of the trust Note: In the case of a company, interests which come within paragraph (i) of the definition of "notifiable interest of a director" should be disclosed in this part. Direct or indirect interest Direct interest Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest. Eric Rose Date of change 1 April 2025 No. of securities held prior to change 6,107,293 ordinary shares (including 71,472 ADS) 6,048,102 options Class Options Number acquired 946,000 options Number disposed Not applicable Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation Nil
Appendix 3Y Change of Director's Interest Notice + See chapter 19 for defined terms. Appendix 3Y Page 2 01/01/2011 No. of securities held after change 6,107,293 ordinary shares (including 71,472 ADS) 6,994,102 options Nature of change Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy-back Issue of options with approval by shareholders at the 2024 AGM Part 2 - Change of director's interests in contracts Note: In the case of a company, interests which come within paragraph (ii) of the definition of "notifiable interest of a director" should be disclosed in this part. Detail of contract Not applicable Nature of interest Not applicable Name of registered holder (if issued securities) Not applicable Date of change Not applicable No. and class of securities to which interest related prior to change Note: Details are only required for a contract in relation to which the interest has changed Not applicable Interest acquired Not applicable Interest disposed Not applicable Value/Consideration Note: If consideration is non-cash, provide details and an estimated valuation Not applicable Interest after change Not applicable Part 3 - +Closed period Were the interests in the securities or contracts detailed above traded during a +closed period where prior written clearance was required? No If so, was prior written clearance provided to allow the trade to proceed during this period? Not applicable
Appendix 3Y Change of Director's Interest Notice + See chapter 19 for defined terms. 01/01/2011 Appendix 3Y Page 3 If prior written clearance was provided, on what date was this provided? Not applicable
Appendix 3Y Change of Director's Interest Notice + See chapter 19 for defined terms. 01/01/2011 Appendix 3Y Page 1 Rule 3.19A.2 Appendix 3Y Change of Director's Interest Notice Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX's property and may be made public. Introduced 30/09/01 Amended 01/01/11 Name of entity Mesoblast Limited ABN 68 109 431 870 We (the entity) give ASX the following information under listing rule 3.19A.2 and as agent for the director for the purposes of section 205G of the Corporations Act. Name of Director Philip R.Krause Date of last notice 16 January 2025 Part 1 - Change of director's relevant interests in securities In the case of a trust, this includes interests in the trust made available by the responsible entity of the trust Note: In the case of a company, interests which come within paragraph (i) of the definition of "notifiable interest of a director" should be disclosed in this part. Direct or indirect interest Direct interest Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest. Not applicable Date of change 1 April 2025 No. of securities held prior to change 28,750 American Depository Shares 1,725,000 options Class Options Number acquired 785,000 options Number disposed Not applicable Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation Nil No. of securities held after change 28,750 American Depository Shares 2,510,000 options
Appendix 3Y Change of Director's Interest Notice + See chapter 19 for defined terms. Appendix 3Y Page 2 01/01/2011 Nature of change Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy-back Issue of options with approval by shareholders at the 2024 AGM Part 2 - Change of director's interests in contracts Note: In the case of a company, interests which come within paragraph (ii) of the definition of "notifiable interest of a director" should be disclosed in this part. Detail of contract Not applicable Nature of interest Not applicable Name of registered holder (if issued securities) Not applicable Date of change Not applicable No. and class of securities to which interest related prior to change Note: Details are only required for a contract in relation to which the interest has changed Not applicable Interest acquired Not applicable Interest disposed Not applicable Value/Consideration Note: If consideration is non-cash, provide details and an estimated valuation Not applicable Interest after change Not applicable Part 3 - +Closed period Were the interests in the securities or contracts detailed above traded during a +closed period where prior written clearance was required? No If so, was prior written clearance provided to allow the trade to proceed during this period? Not applicable If prior written clearance was provided, on what date was this provided? Not applicable