N.C. Gen. Stat. § 58-7-182

In addition to other investments eligible under this Chapter, a title insurer may invest and have invested an amount not exceeding the greater of three hundred thousand dollars ($300,000) or fifty percent (50%) of that part of its policyholders' surplus that exceeds the minimum surplus required by G.S. 58-7-75 in its abstract plant and equipment, in loans secured by mortgages on abstract plants and equipment, and, with the Commissioner's consent, in stocks of abstract companies.