Kidnapped Exmo Bitcoin exchange manager Pavel Lerner was freed by his abductors in Ukraine on Friday, the Financial Times reported.
Lerner, 40, was released after paying a ransom of more than $1m in Bitcoins (Bitcoin), according to Anton Gerashchenko, an adviser to the Ukrainian interior minister.
According to Ukrainian media reports, Mr Lerner was "thrown out on a motorway" by his abductors.
Exmo confirmed that their employee is safe and "there was no physical harm inflicted on him".
Exmo said: "Pavel is currently in a state of major stress, therefore, he will not provide any official comments in the coming days.
"The case is currently under investigation of the state security authorities," it added.
Mr Lerner, a leading analyst at the cryptocurrency company, was kidnapped on 26 December while leaving his office in Kiev's Obolon district.