S: (n) share (any of the equal portions into which the capital stock of a corporation is divided and ownership of which is evidenced by a stock certificate) "he bought 100 shares of IBM at the market price"
S: (n) parcel, portion, share (the allotment of some amount by dividing something) "death gets more than its share of attention from theologians"
S: (n) contribution, part, share (the effort contributed by a person in bringing about a result) "I am proud of my contribution in advancing the project"; "they all did their share of the work"