LSEG

Founded in 1967

link - lseg.com/en/data-analytics 

2021 - LSEG acquires Refinitiv
2013 - datastream integrated into Eikon
2008 - thomson (canada) buys reuters (british)
2001 - thomson buys primark
1992 - Primark acquires Datastream from Dun & Bradstreet
1984 - Dun & Bradstreet buys DataStream
1967 - Datastream is launched

Breakdown

blackstone bought 55% of thomson reuters
thomson reuters had 45%
thomson reuters business was divided into 3 businesses
(financial markets and risk) - which was spun off and called Refinitiv
(news)
(legal & accounting/tax)