| Exhibit Number | | | Description | | |
| 3.1 | | | Our Amended and Restated Articles of Incorporation (incorporated by reference to Exhibit 3.1 to the Company's Form 10-Q report for the quarter ended June 30, 2020, filed July 24, 2020). | | |
| 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 | | | Form of stock certificate for common stock (incorporated by reference to Exhibit 4 to the Company's 1998 Form 10-K, filed May 6, 1999). | | |
| 4.2 | | | Article 5, 6, 8(c) and 9 of our Amended and Restated Articles of Incorporation (incorporated by reference to Exhibit 3.1 to the Company's Form 10-Q report for the quarter ended June 30, 2020, filed July 24, 2020). | | |
| 4.3 | | | Article I and V of our Bylaws, as amended through February 23, 2021 (incorporated by reference from our Form 8-k, filed March 1, 2021). | | |
| 4.4 (1) | | | Instruments defining the rights of holders of long-term debt securities of West and its subsidiaries have been omitted. | | |
| 10.1 | | | Form of 2024 Stock Option Agreement, Performance Stock Unit Agreement and Restricted Stock Unit Agreement, issued pursuant to the 2016 Omnibus Incentive Compensation Plan | | |
| 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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