Chainlink Brings SIX Equities Data Covering €2T in Market Cap Onchain

Chainlink has added SIX Group, the operator of Switzerland's and Spain's stock exchanges, to its DataLink platform, making equities data covering more than €2 trillion in combined market capitalization available onchain for the first time.

The integration, announced Wednesday, means smart contracts across more than 75 blockchains can now programmatically access real-time market data from the SIX Swiss Exchange and BME (Bolsas y Mercados Españoles). The data reaches over 2,600 applications within the Chainlink ecosystem.

What Is Chainlink DataLink and How Does It Work?

Chainlink DataLink is an institutional-grade data publishing service built on Chainlink's oracle infrastructure. Oracles are the bridge between off-chain data, such as stock prices, and on-chain environments like smart contracts. Without oracles, blockchains have no native way to read external data.

DataLink is designed specifically for large, regulated data providers that need to maintain control over entitlements and distribution rights when moving data onto public or private blockchains. In plain terms, a financial data firm can publish its proprietary data onchain without losing control of who can access it or how it is used.

“Chainlink DataLink provides globally trusted data providers like SIX a secure, scalable path to commercialize high-quality market data on-chain while preserving the integrity, entitlements, and distribution controls required by regulated financial institutions,” said Fernando Vázquez, president, capital markets, Chainlink Labs.

What Data Is SIX Making Available Onchain?

SIX Group operates two major exchanges: the SIX Swiss Exchange in Switzerland and BME in Spain. Together, these exchanges list equities with a combined market capitalization exceeding €2 trillion.

Through the Chainlink integration, developers can now access:

• Real-time equities pricing from the SIX Swiss Exchange
• Market data from BME (Bolsas y Mercados Españoles)
• Standardized data formatted for smart contract environments at scale

“Through this integration with Chainlink’s institutional-grade data publishing service, SIX delivers real-time, high-value market data while bringing flagship Swiss and Spanish blue-chip equities onchain via Chainlink’s DataLink,” Matthew Nurse, Head of Market Data at SIX, said. “This enables digital asset applications to access trusted market data through proven, secure infrastructure, fostering trust and innovation across global financial ecosystems.” 

Who Else Has Joined Chainlink DataLink?

SIX is the latest in a growing list of major financial data providers to plug into DataLink. Other notable names include:

• FTSE Russell – the global index provider
• Deutsche Börse – Germany's main stock exchange operator
• S&P Global – the U.S.-based financial data and ratings firm
• BX Digital and BX Swiss – both part of the Boerse Stuttgart Group, which partnered with Chainlink last week
• Coinbase – feeding DataLink its order book and futures trading data

Why Does Onchain Equities Data Matter for Tokenization?

Tokenization refers to the process of creating blockchain-based assets that mirror or officially represent real-world equivalents, such as stocks, bonds, or indices. Some analysts project the tokenized asset market could eventually reach the multi-trillion-dollar range.

For tokenized products to function accurately, they need access to trusted, real-time price feeds from the underlying assets. That is where equities data from exchanges like SIX becomes essential.

Use Cases the SIX Integration Enables

With equities data from SIX now readable by smart contracts, developers can build:

• Tokenized stock indices based on Swiss and Spanish blue-chip equities
• Structured products that reference real exchange prices
• Compliant DeFi applications that use regulated market data
• Prediction markets tied to actual equity performance
• New trading primitives built directly within blockchain environments

SIX's Background in Blockchain and Digital Assets

SIX is not new to blockchain infrastructure. The company launched the SIX Digital Exchange (SDX) in 2020, one of the first regulated digital asset exchanges in the world. SDX operates as a digital asset central securities depository (CSD), the type of institution that settles and holds securities.

SIX has also collaborated with central banks and commercial banks on distributed ledger technology (DLT) experiments. Its early positioning in both traditional market infrastructure and digital assets makes it a natural fit for DataLink, which sits at the intersection of both.

Conclusion

The SIX and Chainlink integration extends onchain access to equities data from two of Europe's largest exchange operators, covering more than €2 trillion in combined market cap. The data is now readable by smart contracts across 75-plus blockchains via DataLink, supporting use cases that include tokenized indices, structured products, and DeFi applications. 

SIX joins a roster of institutional data providers including FTSE Russell, Deutsche Börse, and S&P Global that have connected to Chainlink's infrastructure as demand for reliable, regulated financial data onchain continues to grow.

Resources

1. Press release: SIX and Chainlink Bring Data of Swiss and Spanish Equities with a Combined Market Value of €2 Trillion Onchain

2. Report by The Block: DLT is finding favor among financial market infrastructures and participants

3. Report by The Trade: SIX brings equities data on-chain via Chainlink integration