Md. Code, Fin. Inst. § 4-101

(a) In this title the following words have the meanings indicated. (b) “Mutual holding company” means the corporation which holds more than 50% of the stock of a subsidiary savings bank pursuant to a reorganization under Subtitle 8 of this title. (c) (1) “Savings bank” means an institution that: (i) Is incorporated under the laws of this State as a savings bank; and (ii) Engages only in the business of savings banking. (2) The term “savings bank” includes a subsidiary savings bank for the purpose of applying the provisions of this article. (d) “Subsidiary savings bank” means an institution that: (1) Is incorporated under the laws of this State as a subsidiary savings bank, all of the stock of which is owned by a mutual holding company; (2) Engages only in the business of savings banking; (3) Is a member of the Federal Deposit Insurance Corporation; and (4) Is organized to receive assets and liabilities of a mutual holding company in accordance with this subtitle and Subtitle 9 of this title.