S&P Global completes acquisition of OpenZeppelin

On October 26, 2026, financial rating giant S&P Global completed its acquisition of blockchain security firm OpenZeppelin, less than six weeks after announcing the deal on September 17. OpenZeppelin, which has completed over 900 security reviews and maintains code supporting $38 trillion in digital asset transfers, will operate as a standalone unit under founder Demian Brener. The transaction aims to strengthen S&P Global's technology risk assessment capabilities for on-chain financial products while keeping OpenZeppelin Contracts free and open source.

Transaction details and advisors

• ▪Jefferies LLC and Clifford Chance advised S&P Global on the OpenZeppelin transaction, while FT Partners and Cooley served as financial and legal advisors to OpenZeppelin
• ▪S&P Global completed its acquisition of blockchain security firm OpenZeppelin on October 26, 2026, less than six weeks after initially announcing the transaction on September 17, 2026
• ▪OpenZeppelin publicly confirmed the completion of S&P Global's acquisition of OpenZeppelin via an official post on X

OpenZeppelin's background and achievements

• ▪The OpenZeppelin Contracts library underpins over $38 trillion in transferred digital asset value, including major stablecoins and tokenized funds
• ▪Founded in 2015, OpenZeppelin has conducted over 900 security engagements and uncovered more than 10,000 code vulnerabilities before production

Strategic benefits

• ▪Through S&P Global's acquisition of OpenZeppelin, OpenZeppelin receives the backing of S&P Global's brand, institutional relationships, and global distribution network
• ▪S&P Global acquired OpenZeppelin to expand its capabilities in assessing technology layer risks for on-chain financial products and to develop new security benchmarks