Modern Slavery Act Disclosure Statement Approval, Communication and Review Effective March 2023 This Modern Slavery Act Disclosure Statement is subject to annual review and approval by the Mimecast Board of Directors, or sooner in response to significant changes in Mimecast’s business practices or applicable law and regulations. The Modern Slavery Statement for financial year ending March 31, 2024 is approved by Mimecast’s Board of Directors as of April 1, 2024. 4 © 2022 MIMECAST | ALL RIGHTS RESERVED