Elliott Management is said to be pushing for the breakup of British utility SSE after building a large stake in the company, according to news reports.

The activist investor has been holding talks with SSE representatives and some of its major shareholders to discuss the separation of the utility’s renewable portfolio from its regulated electricity business, according to Bloomberg News, citing people familiar with the matter.

SSE’s share price has surged since Elliott’s position in the utility was first reported in August, and is up around 34% over the last 12 months.

Elliott has track record of investing in utilities, having targeted FirstEnergy, Sempra Energy, and Evergy in the U.S. and EDP-Energias de Portugal and Uniper in Europe. Most recently it called on Duke Energy to pursue a breakup.

The activist has also called on pharma company GlaxoSmithKline to review the position of its CEO Emma Walmsley. However, GSK said in July that it strongly believes Walmsley is the right leader for its plan to spin off its consumer healthcare venture division.

Shares in SSE were up 1% at market close Monday on the London Stock Exchange.