Publications Memos Go Back Final Rules Detailing Merger Filing Thresholds for New Competition Law In China Issued August 4, 2008 08.06.08 Related Insights 12.23.25 | Publications The New York LLC Transparency Act Will Become Effective on January 1, 2026, With a Limited Scope 12.15.25 | Publications Simpson Thacher Sustainability and ESG: Regulatory Update – December 2025 12.10.25 | Publications CARB Issues Proposed Regulations Implementing SB 253 and SB 261 Related Services Related Practice Areas Corporate Mergers and Acquisitions Antitrust and Trade Regulation