Publications Memos Go Back SEC Amends Issuer Common Stock Repurchase Safe Harbor 12.19.03 This memo explains the SEC amendments to Rule 10b-18 which provides a limited safe harbor from claims of market manipulation in the context of issuers repurchasing their own common stock. Related Insights 03.16.26 | Publications Simpson Thacher Sustainability and ESG: Regulatory Update – March 2026 03.12.26 | Publications DOJ’s Department-Wide Corporate Enforcement Policy 03.06.26 | Publications The Ad Standard: Monthly Update - March 2026 Related Services Related Practice Areas Corporate Capital Markets Debt