May Street

MayStreet was a market data technology company that built the world's premier system for capital markets data management. Founded in 2012 by software engineers with deep expertise in building market data systems for some of the world's most performance-dependent market makers and proprietary trading firms, MayStreet developed low latency market data feed handlers and financial market analysis solutions.

The company combined ultra-low latency platform architecture with high-precision, full depth-of-book data to enable clients to gain deeper insights into how global capital markets operate. MayStreet was unique in delivering both real-time and instant intraday historical data through a single API, supporting firm-wide workflows from trade execution and surveillance to instant market analysis, end-of-day reporting, compliance and performance analysis, risk analysis, and historical back testing.

MayStreet served many of the world's leading financial institutions, including banks, asset managers, and hedge funds. The company also operated the US Securities and Exchange Commission's (SEC) Market Information Data Analytics System (MIDAS) since 2019. In 2022, MayStreet was acquired by the London Stock Exchange Group (LSEG) and became part of their enterprise data solutions business within the data and analytics division.