S&P Global (NYSE: SPGI) today announced it has completed its acquisition of OpenZeppelin, the security standard for onchain finance.
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The transaction, first announced on September 17, 2026, complements S&P Global’s risk assessment capabilities in digital asset markets and brings OpenZeppelin's deep expertise in onchain ecosystem development, enhancing its ability to create the next generation of onchain security assessments and benchmarks, and deliver essential intelligence as capital markets transition onchain.
Founded in 2015, OpenZeppelin combines leading onchain security assessments and secure development services with one of the world’s leading open-source smart contract libraries, OpenZeppelin Contracts. Its security team has conducted 900+ engagements for the protocols and institutions defining digital asset markets, surfacing 10,000+ vulnerabilities before production, while OpenZeppelin Contracts underpin over $38 trillion in value transferred, including many of the largest stablecoins and tokenized funds. Alongside its security and open-source work, OpenZeppelin’s engineering team builds secure onchain infrastructure for leading blockchain networks and institutions.
The acquisition expands S&P Global’s risk assessment capabilities into the onchain technology-risk layer that underpins onchain financial products, while S&P Global’s trusted brand, deep institutional relationships, and global distribution accelerate OpenZeppelin’s reach into traditional finance.
“Completing this acquisition is an important step for our digital assets strategy,” said Yann Le Pallec, President, S&P Global Ratings. “As more of the financial system moves onchain, market participants need a clear view of the technology risk that sits beneath the assets they hold. OpenZeppelin’s expertise, from blockchain and smart contract security assessments and secure development to its widely used open-source library, is already foundational to that infrastructure. Together, we can help traditional financial institutions and DeFi-native companies alike understand and manage those risks with greater confidence.”
“Today OpenZeppelin begins its next chapter as part of S&P Global,” said Demian Brener, Founder, OpenZeppelin. “Our team will keep doing what it does best: security assessments and secure development for the world’s leading protocols, networks and institutions building onchain finance, while OpenZeppelin Contracts remain open source, free and publicly maintained. With S&P Global, we can expand the reach and impact of those standards across global markets.”
OpenZeppelin will continue to operate as its own business unit under the OpenZeppelin name. Brener will continue to lead the business, reporting to Yann Le Pallec, President, S&P Global Ratings.
Financial terms of the transaction were not disclosed. The transaction is not expected to have a material impact on the financial results of S&P Global.
Jefferies LLC served as financial advisor to S&P Global; Clifford Chance acted as S&P Global’s legal advisor. FT Partners served as exclusive financial and strategic advisor to OpenZeppelin; Cooley acted as OpenZeppelin’s legal advisor.