Citigroup has activated a platform that allows wealthy and institutional clients outside the United States to buy tokenized exposure to private company shares, using blockchain infrastructure operated by Switzerland's regulated SIX Digital Exchange (SDX). The bank completed its first live transaction on the platform at launch, with clients investing in Kaleido, an institutional tokenization and digital-asset infrastructure firm, marking the move from pilot to active client onboarding.

The product uses a structure called a tokenized depositary receipt (TDR). Rather than transferring actual shares, Citi issues a digital token on the SDX blockchain that represents a regulated claim on an underlying depositary receipt, which is itself backed by private company shares held in Citi's custody. The model mirrors how American Depositary Receipts (ADRs) give non-US investors access to foreign public equities, but replaces paper-based settlement with on-chain settlement. That shift enables near-instant settlement compared to the two or more days typical in traditional markets, and allows automated compliance checks and cap table tracking via smart contract. Clients access the product on a transaction- and maintenance-based fee structure.

Citi acts as both issuer and custodian on the platform. SDX, the digital arm of the SIX Group that runs the Swiss stock exchange, provides the regulated distributed ledger technology (DLT) clearing and settlement layer. The two firms announced their partnership at the Point Zero Forum in Zurich in May 2025, with SDX Head David Newns describing the goal as making "the efficient distribution of shares in mature international private companies, which are expected to generate strong investor interest" accessible through regulated blockchain infrastructure. Citi's Ryan Marsh, Head of Innovation and Strategic Partnerships, said at the time that the bank would "support global clients with end-to-end servicing of tokenized assets" in its roles as tokenization agent and digital custodian.

The platform was designed to launch for non-US investors first, with any expansion to US clients contingent on regulatory approval. Distribution is being handled through two regional partners: SBI Digital Markets, a subsidiary of Japan's SBI Holdings with significant reach across South and Southeast Asia, and Sygnum, a European digital-asset firm. Standard Chartered joined SDX as a central securities depository member in March 2025. Citi has said it is in discussions with large private companies about listing on the platform but has not disclosed names. Investor appetite is being driven in part by demand for pre-IPO exposure to technology firms approaching public markets; companies such as SpaceX, Anthropic, and OpenAI are among the demand drivers that industry participants cite, though the bank has not confirmed any specific listings. Institutional clients evaluating this category should note that OpenAI previously issued a public clarification stating it had not endorsed certain tokenized share products circulating under its name, a conduct risk that warrants inclusion in due diligence for any product marketed on the basis of pre-IPO demand.

For institutional investors and high-net-worth clients in South Asia and Africa, the platform's non-US-first architecture is a meaningful structural shift. Secondary market platforms that have historically offered private company shares, including Hiive, EquityZen (owned by Morgan Stanley), and Forge (owned by Charles Schwab), are primarily designed for US-accredited investors. Citi's TDR structure creates a bank-intermediated channel that is built for international clients from launch. In Asia, SBI Digital Markets as a named distribution partner suggests the platform was designed with regional institutional access in mind from the outset. In India, the relevance extends to regulatory momentum: SEBI Chairman Tuhin Kanta Pandey announced in May 2026 that the regulator is running a blockchain pilot for tokenized corporate bond settlement, with a 6 to 9 month implementation timeline. That pilot, which involves a permissioned DLT system co-overseen by SEBI and the Reserve Bank of India, creates domestic regulatory infrastructure that could eventually be extended to equity tokenization. In Africa, Nigeria's Investments and Securities Act 2025 formally recognized digital assets as securities under SEC oversight; Nigeria also recorded approximately $92.1 billion in crypto transaction volume between July 2024 and June 2025, illustrating the depth of institutional and retail demand in that market. South Africa now has more than 300 licensed crypto firms. Kenya's draft VASP Bill introduces additional regulatory structure for digital asset service providers, and Mauritius is advancing its own digital asset licensing framework. None of these jurisdictions has yet produced a framework that explicitly covers foreign tokenized securities products like TDRs, meaning institutional clients in those markets still need to satisfy Citi's eligibility criteria and navigate local securities law independently.

The on-chain data provides context for how large this market is becoming. Tokenized real-world assets (RWA), excluding stablecoins, are estimated at approximately $17 billion as of mid-2026 according to Citi's own Tokenization 2030 research; broader third-party market estimates from sources including Spaziocrypto and RWA.xyz place the figure between $27.6 billion and $32 billion, reflecting differences in methodology and asset scope. By any measure, the figure has grown roughly 589 percent since early 2025. Ethereum hosts approximately 56 percent of tokenized asset value by current estimates, with tokenized US Treasuries making up roughly $8.7 billion of the total. Citi's research arm projects the broader tokenized securities market reaching $5.5 trillion by 2030, with a range of $2.7 trillion to $8.2 trillion depending on regulatory conditions. Within that projection, tokenized private equity and private credit are each expected to reach around $100 billion by that date, tokenized real estate funds are projected at approximately $200 billion, and stablecoin-linked tokenized stocks are projected to reach $2.6 trillion. Citi's move sits within a broad industry wave: BlackRock, JPMorgan, Franklin Templeton, Morgan Stanley, DTCC, Nasdaq, and NYSE (ICE) are all active or planning tokenized asset initiatives, positioning this as an industry-wide structural shift rather than an isolated product launch.

Citi has stated publicly that it intends the platform to become an industry standard that other financial institutions can adopt. For fintech builders in South Asia and Africa who service wealth managers or custody providers, that open-architecture ambition may signal integration opportunities ahead, particularly as regional regulators build out their own DLT frameworks for securities settlement. The platform's use of smart contract automation for cap table management and compliance logic (covering KYC checks, transfer restrictions, and investor eligibility) offers a concrete technical reference for regional developers, and the SDX central securities depository model provides a potential reference architecture for regulated settlement infrastructure. Precedents for analogous structures are already emerging locally: DAMREV's $330 million copper mine tokenization deal in Namibia in 2024 demonstrates that African fintechs are already building TDR-like instruments adapted to regional asset classes and regulatory contexts.