A document released on Wednesday shows that the USA asset management giant Vanguard Group recently purchased over 4 million shares of the independent power producer Talen Energy, increasing its stake from 9.9% to 10.4%. As large technology companies invest heavily in AI technology, the demand for electricity to power data centers has also grown. This has propelled Talen Energy's stock price to rise more than threefold last year. Vanguard Group is Talen Energy's second largest shareholder.