"Share purchase" refers to the act of buying stocks or shares of a company. It means investing money to become an owner of a portion of that company's ownership. Full definition
She frequently advises and acts in disputes in relation to share purchase agreements, shareholder agreements, the construction of partnership agreements and claims of breach of fiduciary duties against directors. (11kbw.com)
Also, I am part of share purchase plan which is somewhat risky but, I do get a 5 % discount which is good. (getrichslowly.org)
Share purchase plans offer eligible employees the chance to purchase shares, sometimes through a loan from their employer. (moneysmart.gov.au)