Final answer:
The company's bylaws or regulations are the documents where Grant can find the date of Big Co.'s annual shareholders meeting. These bylaws govern the scheduling of such meetings.
Step-by-step explanation:
Grant is looking for the date of the annual shareholders meeting of Big Co. The document that will contain this information is the company's bylaws or regulations. These set forth the rules and guidelines for how the company operates, including the scheduling and conduct of shareholder meetings.
Articles of incorporation and articles of organization are initial documents filed to legally form a corporation or limited liability company (LLC) respectively, and they don't typically include details about annual meetings. An operating agreement is used by LLCs and it primarily outlines the business and financial arrangements of the members, but may not necessarily specify the details of shareholder meetings.