Avantor, Inc.

AVTR·NYSE·$8.14Share Price as of 11/2·$6BMarket Cap as of 11/2

Financials

10-QQ3 ended 09/30/2610/28/26 10-QQ2 ended 06/30/2607/29/26 10-QQ1 ended 03/31/2604/29/26 10-KFY 202502/11/26 10-QQ3 ended 09/30/2510/29/25

Disclosures

8-KCurrent report10/28/26 8-KCurrent report09/21/26 8-KCurrent report09/21/26 8-K/ACurrent report (amended)08/27/26 8-KCurrent report07/29/26

Prospectuses and Registrations

424B5Prospectus supplement09/15/21 424B5Prospectus supplement09/13/21 POSASRProspectus / registration09/13/21 424B7Prospectus11/09/20 424B7Prospectus11/04/20

Proxies

DEF 14ADefinitive proxy03/27/26 DEFA14AAdditional proxy materials03/27/26 DEF 14ADefinitive proxy03/28/25 DEFA14AAdditional proxy materials03/28/25 DEF 14ADefinitive proxy03/29/24

Ownership

Form 3Initial insider ownership09/23/26 Form 4Insider transaction09/23/26 Form 4Insider transaction08/20/26 Form 4Insider transaction08/18/26 Form 4Insider transaction08/04/26

Other

SDConflict Minerals disclosure05/29/26 UPLOADLetter from the SEC05/06/26 CORRESPCorrespondence with the SEC04/27/26 UPLOADLetter from the SEC04/13/26 ARSAnnual report to shareholders03/27/26