ASM share buyback update May 27 – 31, 2024

Almere, The Netherlands
June 3, 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 27, 2024	4,400	€ 664.38	€ 2,923,253
May 28, 2024	3,200	€ 666.14	€ 2,131,648
May 29, 2024	8,200	€ 657.93	€ 5,394,989
May 30, 2024	8,300	€ 654.92	€ 5,435,812
May 31, 2024	11,500	€ 647.12	€ 7,441,931
Total	35,600	€ 655.27	€ 23,327,633

These repurchases were made as part of the €150 million share buyback program which started on May 15, 2024. Of the total program, 31.8% 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 Bareño T: +31 88 100 8500 E: [email protected]

Investor relations Valentina Fantigrossi T: +31 88 100 8502 E: [email protected]

20240603 ASM Share Buyback Update May 27 - 31 2024