Swiss CSD Crypto Custody Approved as SIX Merges Digital Exchange

FINMA has cleared SIX to fold its digital-asset venue SIX Digital Exchange into its traditional central securities depository SIX SIS, and to offer crypto custody directly through that consolidated CSD. The decision makes Switzerland one of the first jurisdictions where regulated institutional investors can settle tokenised securities and hold native crypto assets inside the same licensed post-trade entity.

For banks, asset managers, and custodians, it removes a structural barrier that has kept digital assets parked outside core securities operations for most of the past decade.

What exactly did FINMA approve?

Two separate decisions, taken together. The first authorises the legal merger of SIX Digital Exchange AG, the standalone DLT-based CSD launched in 2021 under Switzerland's DLT Act, into SIX SIS AG, the conventional CSD that already settles the bulk of Swiss-franc securities flows. The second authorises SIX SIS, post-merger, to provide crypto custody services for non-tokenised digital assets such as bitcoin and ether under its existing CSD licence.

Until now, regulated CSDs across Europe have largely been confined to traditional securities and tokenised instruments issued on permissioned ledgers; bringing native crypto into that perimeter is the more novel of the two approvals.

Why does merging two CSDs matter for institutional investors?

The practical answer is operational simplification. Institutions currently dealing with SIX in both worlds maintain duplicate accounts, duplicate connectivity, and duplicate reconciliation processes, one for SIX SIS and one for SDX. Under the merged structure, SIX is marketing what it calls a "one plug to two worlds" model: a single membership, single connection, and single legal counterparty covering Swiss equities, bonds, ETFs, tokenised securities, and now crypto custody.

For a mid-sized private bank that today runs separate workflows for digital assets, that consolidation can materially reduce the cost of offering crypto exposure to wealth clients, an offering that has become competitive table stakes in Zurich and Geneva.

How does this compare to the rest of Europe?

Most European CSDs remain mono-asset by design. Euroclear and Clearstream have launched digital-asset initiatives, including Clearstream's D7 platform and Euroclear's DLT-based issuance pilots, but neither currently offers native crypto custody under a CSD licence.

The European Central Bank's ongoing work on a wholesale DLT settlement solution, due for a decision later in 2026, is moving in a similar direction but on a longer timeline. SIX's approval therefore gives Switzerland a roughly 12 to 24 month head start on the EU framework, which itself sits alongside the Markets in Crypto-Assets Regulation (MiCA) that took full effect across the bloc in December 2024.

What does it mean for SIX's 2030 strategy?

The merger is the clearest signal yet that SIX intends to compete as a pan-European post-trade provider rather than a domestic Swiss champion. Rafael Moral Santiago, Head of Securities Services and a member of the SIX Executive Board, framed the decision as a step toward becoming "a pan-European provider of integrated and digital post-trade solutions by 2030."

That ambition puts SIX on a collision course with Euroclear and Clearstream, both of which dwarf it in assets under custody, but neither of which holds a comparable consolidated digital and traditional remit under a single licence. Whether SIX can convert its regulatory lead into market share will depend on pricing, on connectivity to non-Swiss issuers, and on whether large European banks are willing to route digital-asset flows through Zurich rather than Frankfurt or Brussels.

Why this matters to FinanceX readers

Crypto custody is no longer a parallel universe operated by specialist firms. With FINMA placing native digital assets inside the same licensed perimeter as Swiss government bonds, the question for banks, asset managers, and pension funds shifts from whether to offer regulated crypto exposure to which infrastructure provider to use.

Expect competitive pressure on Euroclear, Clearstream, and the ECB's wholesale settlement timeline to accelerate over the next 18 months, and expect crypto custody fees, currently a high-margin business for specialist custodians, to compress as CSD-grade infrastructure enters the market.

By Koen Vanderhoydonk - FinanceX Magazine