Jupiter announced the increase in an RNS notification on the London Stock Exchange on Friday afternoon.
Silchester, which was formed in 1994 to specialise in international equity investment primarily on behalf of institutional investors, first bought into Jupiter in 2014 and has been gradually increasing its stake since.
On 27 February, the day Jupiter published its annual results, it was announced that Silchester had increased its holding in Jupiter from just over 5% to 10.1%.
It now owns 12.04%.
Silchester’s website says it “seeks to earn an attractive long-term investment return through investment in quoted international equities”.
Jupiter said it could not comment further.
