S&P Global announced an agreement to acquire OpenZeppelin on September 17, saying the transaction would expand its digital asset risk assessment capabilities into smart contract and onchain technology risk. The companies did not disclose financial terms. S&P Global said OpenZeppelin would remain a separate unit led by Demian Brener, and that closing is still subject to customary conditions.
That structure matters for Midnight because OpenZeppelin is developing tools specifically for its privacy focused smart contract environment. In its September network update, Midnight said OpenZeppelin is building a dedicated Compact smart contract library and application starter pack. The same update said OpenZeppelin contracts have secured more than $37 trillion in transferred value.
The figure establishes OpenZeppelin’s scale, but it does not by itself answer the question Midnight users will care about most: who sets the priorities for the code, standards and applications that support private transactions?
A security layer with institutional weight
OpenZeppelin’s work with Midnight began before the acquisition announcement. In February 2025, Midnight announced its partnership with OpenZeppelin to develop Compact libraries, standards and starter applications. The planned areas included decentralized finance, identity, nonfungible tokens and real world asset tokenization.
Compact is central to Midnight’s effort to make privacy preserving applications practical for developers. A dedicated library and starter applications can reduce the work required to build on the network, while common standards can make applications easier to audit and use together. That creates an adoption advantage, but it also gives the organization maintaining those tools influence over how applications are designed.
The acquisition therefore brings two institutional roles closer together. OpenZeppelin provides security infrastructure and development standards. S&P Global evaluates risk for financial and corporate users. Its stated interest in smart contract and onchain technology risk could help translate blockchain security into language institutions already understand. It could also make OpenZeppelin’s work more relevant to tokenized assets and regulated financial products.
Those possibilities are not identical. Security tooling that serves a broad open source ecosystem should not become narrowly optimized for the needs of large financial institutions. Midnight’s planned Compact tools will be most valuable if they remain useful to independent developers, smaller applications and users who choose privacy for reasons beyond institutional compliance.
The governance question
The immediate issue is not whether S&P Global can bring capital or distribution to OpenZeppelin. It is whether the acquisition changes the incentives around an open source security layer.
The terms of the transaction were not disclosed, so the public record does not show how commercial priorities will be balanced against community needs. S&P Global’s announcement says OpenZeppelin will remain a separate unit, but operational separation is not the same as technical independence. For Midnight, the practical indicators will be decisions about licensing, maintenance, audit priorities and whether Compact development continues at the pace and scope previously promised.
The only outside reaction identified for this report came from The Block, which reported comments from Strobe Ventures’ Thomas Klocanas and S&P executive Maria Drinkwater. Klocanas said preserving OpenZeppelin’s open source libraries was particularly important and warned that an exploit involving a trusted financial brand could create reputational damage. Drinkwater said S&P’s onchain services would follow existing governance, independence and analytical standards.
No opposing public view was found in the supplied sources. That absence should not be mistaken for proof that users have no concerns. It simply means the available record contains a warning about preserving openness and a response from S&P, but not a documented dispute over the deal.
Midnight’s privacy proposition will ultimately be judged through working applications, not partnership language. The acquisition becomes strategically positive if S&P Global’s resources strengthen Compact security while preserving broad access and independent standards. It becomes a constraint if institutional risk priorities narrow the tools or governance that Midnight developers can rely on.
Until the transaction closes and those choices become visible, the central fact is straightforward: Midnight has gained a potentially powerful security partner, but that partner is entering a company whose business is measuring and managing financial risk. The next test is whether privacy preserving infrastructure can remain a public ecosystem resource while serving that institutional agenda.
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