One of the world's most aggressive activist investors has set its sights on the London Stock Exchange Group, building a significant stake and urging management to prioritise shareholder returns and competitive edge.

Elliott's Stake and Demands

Elliott Management, the hedge fund founded by billionaire Paul Singer in 1977, has taken a position in LSEG and is actively engaging with the company, a person familiar with the matter told Reuters on 11 February 2026. Managing approximately $79.8 billion in assets as of late 2025, Elliott is renowned for its forceful campaigns targeting underperforming firms across sectors.

Sources indicate Elliott is encouraging LSEG to launch a new share buyback programme and intensify efforts to close the gap with rivals. Notably, the activist does not support a full sale or spin-off of LSEG's core stock exchange business, distinguishing this intervention from more radical restructuring proposals.

Context in Elliott's UK Campaign Trail

This development marks Elliott's latest foray into UK markets, following high-profile engagements with energy giants BP and Anglo American, as well as engineering firm Smiths Group. In BP's case, disclosed in April 2025, Elliott pressed for debt reduction and operational simplification to address perceived undervaluation.

Earlier stakes in Saga Plc and Shell underscore Elliott's pattern of targeting undervalued or strategically adrift British firms. The fund's interventions have often yielded concessions, such as board changes or asset disposals, enhancing shareholder value.

Implications for LSEG and UK Finance

LSEG, operator of the FTSE indices and owner of data provider Refinitiv, has faced scrutiny over growth amid global competition from exchanges like NYSE and Nasdaq. Elliott's involvement could pressure executives to accelerate capital returns, potentially through buybacks funded by strong cash flows from data services.

City analysts view the stake as a vote of confidence in LSEG's underlying assets but a call to streamline amid macroeconomic headwinds. Shares in LSEG reacted positively in early trading, reflecting investor anticipation of value-unlocking measures.

For the broader UK financial sector, Elliott's push highlights ongoing activist interest in London's markets infrastructure, at a time when post-Brexit competitiveness remains a focal point for policymakers and investors.