ASM share buyback update May 20

ASM share buyback update May 20 – 24, 2024

Almere, The Netherlands May 27, 2024, 5:45 p.m. CET

ASM International N.V. (Euronext Amsterdam: ASM) reports the following transactions, conducted under ASM's current share buyback program.

Date	Repurchased shares	Average price	Repurchased value
May 20, 2024	4,700	€ 647.93	€ 3,045,285
May 21, 2024	4,600	€ 655.52	€ 3,015,399
May 22, 2024	4,300	€ 659.11	€ 2,834,181
May 23, 2024	3,500	€ 669.69	€ 2,343,923
May 24, 2024	5,100	€ 661.17	€ 3,371,953
Total	22,200	€ 658.14	€ 14,610,741

These repurchases were made as part of the €150 million share buyback program which started on May 15, 2024. Of the total program, 16.2% has been repurchased. For further details including individual transaction information please visit: www.asm.com/investors/dividends-share-buybacks.

About ASM International

ASM International N.V., headquartered in Almere, the Netherlands, and its subsidiaries design and manufacture equipment and process solutions to produce semiconductor devices for wafer processing, and have facilities in the United States, Europe, and Asia. ASM International's common stock trades on the Euronext Amsterdam Stock Exchange (symbol: ASM). For more information, visit ASM's website at www.asm.com.

This press release contains inside information within the meaning of Article 7(1) of the EU Market Abuse Regulation.

Contact Investor and media relations Victor BareñoT: +31 88 100 8500 E: investor.relations@asm.com

Investor relations Valentina FantigrossiT: +31 88 100 8502E: investor.relations@asm.com

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