| Exhibit Number | | | Description | | |
| 3.1 | | | Our Amended and Restated Articles of Incorporation, effective May 6, 2025 (incorporated by reference to Exhibit 5.7 to the Company's Form 8-K, filed May 8, 2025). | | |
| 3.2 | | | Our Amended and Restated Bylaws, effective October 23, 2023 (incorporated by reference to Exhibit 3.2 to the Company's Form 10-Q report for the quarter ended September 30, 2023, filed October 26, 2023). | | |
| 4.1 | | | Articles 5, 8(c) and 9 of our Amended and Restated Articles of Incorporation, effective May 6, 2025 (incorporated by reference to Exhibit 5.7 to the Company's Form 8-K, filed May 8, 2025). | | |
| 4.2 | | | Articles I and IV of our Bylaws, as amended through October 23, 2023 (incorporated by reference to Exhibit 3.2 to the Company's Form 10-Q report for the quarter ended September 30, 2023, filed October 26, 2023). | | |
| 4.3 | | | Description of Registered Securities (incorporated by reference to Exhibit 4.3 to the Company's Form 10-K report for the year ended December 31, 2025, filed February 17, 2026) | | |
| 4.4 (1) | | | Instruments defining the rights of holders of long-term debt securities of West and its subsidiaries have been omitted. | | |
| 10.1 | | | Executive Employment Agreement between West Pharmaceutical Services, Inc. and Michel Lagarde, dated May 31, 2026 (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed June 1, 2026). | | |
| 31.1 | | | Certification by the Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. | | |
| 31.2 | | | Certification by the Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. | | |
| 32.1* | | | Certification by the Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. | | |
| 32.2* | | | Certification by the Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. | | |
| 101.INS | | | The instance document does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document. | | |
| 101.SCH | | | Inline XBRL Taxonomy Extension Schema Document | | |
| 101.CAL | | | Inline XBRL Taxonomy Extension Calculation Linkbase Document | | |
| 101.LAB | | | Inline XBRL Taxonomy Extension Label Linkbase Document | | |
| 101.PRE | | | Inline XBRL Taxonomy Extension Presentation Linkbase Document | | |
| 101.DEF | | | Inline XBRL Taxonomy Extension Definition Linkbase Document | | |
| 104 | | | Inline XBRL for the cover page of this Quarterly Report on Form 10-Q, included in the Exhibit 101 Inline XBRL Document Set. | | |
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