going through papers of my fathers estate and he h

going through papers of my fathers estate and he has shares in this company from back in 2009 along with a lot of promotional material. Can anyone tell me how much he would have paid for the shares in 2009. I found print outs from his email, only name on there is Boris, who was telling him they were going to begin flying later that year, all was set to go and there were emails of confirmation of money transfers, wire instructions, that kind of thing. The best I can figure is he sent them jut under $300K USD during that time which surprises me as he normally was careful about investing too much in any one thing. Any information you guys have would be helpful. Trying to find out if these were issued in share certificates or if he had an account somewhere. His other accounts do not show this at all.