Md. Code, Insurance § 11–324

On or before August 15 of each year, the Commissioner shall:

(1) prepare a list of insurers that are major insurers;

(2) compute each insurer’s market share in the State in the preceding calendar year;

(3) notify in writing each insurer that has been designated as a major insurer; and

(4) compute each insurer’s market share in Baltimore City.