Emerdata is a British company that lists the two daughters of right-wing American hedgefund billionaire Robert Mercer - Rebekah Mercer and Jennifer Mercer - as directors, alongside Alexander Nix,the former chief executive of disgraced data analytics firm Cambridge Analytica, and British venture capitalist Julian Wheatland.
Wheatland was appointed Emerdata's chief operating officer in August 2017 when the company was first set up. He is the chairman of Cambridge Analytica's parent company SCL Group. Emerdata shares an address in Canary Wharf, London with SCL.
Companies House filings show that the Mercers were appointed on 16 March 2018.
Emerdata also lists Johnson Chun Shun Ko, who according to Business Insider is a Chinese executive from Frontier Services Group, the military firm chaired by prominent Trump supporter Erik Prince. 
It isn't clear what Emerdata does, though the company is listed under "data processing, hosting, and related activities." It shares an address in Canary Wharf with Cambridge Analytica's parent, SCL Group.
- Companies House, Emerdata officers], accessed 21 March 2018
- Shona Gosh, The power players behind Cambridge Analytica have set up a mysterious new data company, Business Insider, 21 March 2018