European competition authorities will decide on London Stock Exchange Group PLC's proposed acquisition of Refinitiv Holdings Ltd. for roughly $27 billion "around the summer," Reuters reported, citing Raffaele Jerusalmi, a board member at the British bourse.

Earlier in January, sources told the Financial Times that LSE will file the deal with EU authorities within weeks for competition assessment.

Meanwhile, Jerusalmi, who also serves as CEO of LSE-owned Borsa Italiana SpA, reiterated that the Italian stock exchange is a "strategic asset" for the U.K. company and is "not up for sale at the moment."

Borsa Italiana has been the subject of purported interest from Euronext NV, as well as reports that LSE would need to offload assets for antitrust approval and to fund the Refinitiv transaction.