microsoft on monday said it was investing in the london stock exchange in a deal that will see the stock exchange use the software giant’s data and cloud infrastructure microsoft msft is going to buy a 4 stake in the london stock exchange lseg valued at £15 billion 18 billion using friday’s closing price from blackstone bx and thomson reuters tri  which hold a stake from the refinitiv deal in addition scott guthrie who is an executive vice president of cloud and artificial intelligence will join the lse as a board member over the next three years the lse will be spending an additonal between £250 million and £300 million which will hit ebitda margins by between 50 and 100 basis points the lse will commit to spending at least 28 billion with microsoft on cloud consumption amazon’s amzn aws has previously identified the lse as a customer