It is type O, Rh minus.
For some reason, there is no blood type information on English Wikipedia.
The following is another source.
For your information, Time Cook, Apple's present CEO is O-, too.
According to this video, most of billionares are O. 你的血型決定你的命運，O型血最有錢？AB型血最稀少？ | 老高與小茉 Mr & Mrs Gao Mark Zuckerberg O - Facebook Steve...