Avantor stockholders re-elect all nine directors, approve exec pay, ratify auditor

3. The stockholders approved, on an advisory basis, one year as the frequency of the non-binding advisory vote to approve executive compensation, based on the following voting results: 1 Year 2 Years 3 Years Abstentions Broker Non-Votes Advisory Vote on the Frequency of Future Advisory Votes on Executive Officer Compensation 605,480,159 9,225 14,892,420 139,666 17,687,677

1. The stockholders elected nine directors to serve for a one-year term expiring at the Company’s 2027 Annual Meeting of Stockholders, subject to election and qualification of their successors, based on the following voting results: Votes For Votes Against Abstentions Broker Non-Votes Nominee Simon Dingemans 597,767,916 2,626,150 20,127,404 17,687,677 Emmanuel Ligner 588,992,737 11,392,819 20,135,914 17,687,677 Gregory Lucier 585,865,815 14,527,528 20,128,127 17,687,677 Louise Makin 593,540,559 26,641,131 339,780 17,687,677 Joseph Massaro 590,921,914 29,353,354 246,202 17,687,677 Sanjeev Mehra 596,961,853 3,421,597 20,138,020 17,687,677 Mala Murthy 594,916,679 25,361,252 243,539 17,687,677 Michael Severino 588,864,758 31,415,688 241,024 17,687,677 Gregory Summe 522,018,929 78,326,277 20,176,264 17,687,677

4. The stockholders ratified the appointment of Deloitte & Touche LLP as the Company’s independent registered public accounting firm for the year ending December 31, 2026, based on the following voting results: Votes For Votes Against Abstentions Ratification of Appointment of Independent Registered Public Accounting Firm 629,271,458 8,805,313 132,376

2. The stockholders approved, on an advisory basis, the 2025 compensation of the Company’s named executive officers, based on the following voting results: Votes For Votes Against Abstentions Broker Non-Votes Advisory Vote on Named Executive Officer Compensation 601,462,107 18,474,344 585,019 17,687,677