Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

What percent of a company are you buying when you purchase stock?
What percent of a company are you buying when you purchase stock? The percent of a company represented by a single share can be calculated by percent = 1/number_of_shares*100% Apple comprises 5,250,000,000 shares, so one share makes up about 1.9e-8% of a company, or 0.000000019% of Apple.