"The stock [has become] a show-me story," for LSEG to prove its targets are achievable, he said. In April, Refinitiv's Eikon data terminals, which compete against Bloomberg's equivalent, suffered an outage that one user said lasted about five hours. A similar event, lasting less time, followed in June. Mr. Schwimmer, an architect of the Refinitiv deal, blamed the June service disruption on a corrupted index and authentication system. But he said it had nothing to do with the underlying products. He said the problem was being fixed. Investors will be able to judge for themselves the progress of Refinitiv's integration when LSEG reports its half-year results on Aug. 6. The process includes absorbing almost 18,000 employees—more than triple the LSEG head count. The company is also rolling out Refinitiv's updated Workspace platform, which will help users adapt to the post-pandemic world of remote work.