ASM share buyback update June 23 – 27, 2025

June 30, 2025, 5:45 p.m. CET ASM International N.V. (Euronext Amsterdam: ASM) reports the following transactions, conducted under ASM's current share buyback program.DateRepurchased sharesAverage priceRepurchased valueJune 23, 20259,874€ 517.47€ 5,109,461June 24, 202511,169€ 533.12€ 5,954,417June 25, 202510,980€ 545.59€ 5,990,567Total32,023€ 532.57€ 17,054,445 These repurchases were made as part of...

June 30, 2025, 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
June 23, 2025	9,874	€ 517.47	€ 5,109,461
June 24, 2025	11,169	€ 533.12	€ 5,954,417
June 25, 2025	10,980	€ 545.59	€ 5,990,567
Total	32,023	€ 532.57	€ 17,054,445

These repurchases were made as part of the €150 million share buyback program which started on April 30, 2025. Of the total program, 40.0% 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]

Attachment

• 20250630 ASM Share Buyback Update June 23 - 27, 2025