London Stock Exchange Group

Global leader in financial markets infrastructure and data, with significant data and analytics assets relevant to identity and audience intelligence markets

London Stock Exchange Group (LSEG) is one of the world's leading financial markets infrastructure and data businesses, headquartered in London. Originally founded as a stock exchange, LSEG has transformed into a diversified financial data and analytics powerhouse through a series of strategic acquisitions, most notably the £27 billion acquisition of Refinitiv from Blackstone and Thomson Reuters in January 2021. This acquisition dramatically expanded LSEG's data, analytics, and technology capabilities, making it a major competitor to Bloomberg in financial data services. LSEG's connection to the AdTech ecosystem stems primarily through its data and identity infrastructure assets. Through Refinitiv and related acquisitions, LSEG operates data connectivity and analytics platforms that intersect with programmatic advertising, identity resolution, and audience data markets. The group's data assets — including financial, behavioral, and identity-linked datasets — have relevance to advertisers, agencies, and data-driven marketing platforms seeking premium audience intelligence. In the AdTech lineage context, LSEG has served as a parent or acquirer of companies operating in data connectivity, identity, and analytics spaces that overlap with advertising technology. The group's scale, global reach across 190+ countries, and deep data infrastructure position it as a significant institutional player whose subsidiaries and portfolio companies touch the broader data-driven marketing ecosystem.