SIX Group
Financial Infrastructure
SIX is what happens when a country's banks decide to own their own plumbing. Formed in 2008 from the merger of the SWX Swiss Exchange, SIS and Telekurs, SIX Group Ltd is owned by around 120 Swiss and international financial institutions — the same banks that use it — and operates the infrastructure on which the Swiss financial centre runs: the stock exchange, securities settlement and custody, interbank payment processing, and the financial data that prices everything else. The name stands for Swiss Infrastructure and Exchange, and the ownership structure explains the strategy. A consortium-owned utility optimises for reliability and long-term position rather than for quarterly earnings, which is why SIX has been able to make acquisitions that took years to pay off.
The largest of those reshaped the company. SIX acquired Bolsas y Mercados Españoles — the operator of the Spanish stock exchange — in 2020, giving a Swiss, non-EU company a substantial regulated presence inside the European Union, and it followed in 2025 with the acquisition of the UK's Aquis Exchange. The strategic direction is explicitly pan-European: SIX has said it intends to combine SIX x-clear with BME to create a unified multi-asset central counterparty across Europe, and the stated ambition is to be a genuinely European infrastructure provider rather than a Swiss one with foreign subsidiaries. The group runs four business units — Exchanges, Securities Services, Financial Information, and Banking Services — with roughly 4,000 employees.
Operationally, 2025 was the strongest year in the company's history and the accounts still showed a loss. Net operating income rose 4.7% to CHF 1,496.5 million, EBITDA excluding transformation costs jumped 22.2% to CHF 542.3 million, and adjusted group net profit reached CHF 247.2 million, up 20.9%. The reported group result was a loss of CHF 313.7 million — entirely because of CHF 560.9 million in value adjustments on the Worldline stake. That holding is the residue of the 2018 sale of SIX's card business to Worldline, paid for in shares, and it has been written down repeatedly as Worldline's price collapsed: roughly CHF 862 million in 2023, CHF 168 million in 2024, and CHF 561 million in 2025. In November 2025 SIX reclassified the participation from an associate to a financial investment and declined to take part in Worldline's capital increase, accepting dilution from 10.5% to roughly 1.3%. The stake can no longer materially damage the accounts, which is the point. Bjørn Sibbern, the Danish former Nasdaq and OMX executive who became CEO on 1 January 2025 succeeding Jos Dijsselhof, is running a group-wide programme called Scale Up 2027 targeting an EBITDA margin above 40% by the end of 2027.
The part of SIX most relevant to fintech buyers is Financial Information, a business with over a thousand staff and around CHF 418 million in revenue whose roots run back to Ticker AG in 1930. It supplies reference data, pricing, indices, and — increasingly — regulatory and tax services, competing with Bloomberg, LSEG and SIX's own owners' internal capabilities. Within that unit sits a product worth noting because it addresses a compliance gap that the mainstream AML vendors mostly don't: the Sanctioned Securities Monitoring Service, which screens securities, issuers and investment restrictions rather than individuals and entities. Most sanctions screening in this directory — ComplyAdvantage, World-Check and their peers — answers the question of whether a person is sanctioned. Whether a specific ISIN is caught by an investment prohibition, or whether an issuer's ownership structure triggers a restriction, is a different data problem, and one that got considerably harder after 2022 as sanctions regimes moved from named individuals to sectoral and securities-level prohibitions. It is the kind of unglamorous, high-consequence dataset that a 95-year-old financial data business is well placed to maintain.
Founded 2008