Wis. Stat. § 214.305: Annual and special meetings.

The date of the annual meeting of members or stockholders shall be specified in the bylaws. Failure to hold an annual meeting may not cause a dissolution of the savings bank. Special meetings may be called by the board of directors, by stockholders of not less than 20 percent of the outstanding stock, by members constituting not less than 20 percent of the eligible votes or by any other person designated in the bylaws. The division may call a special meeting with not less than 7 days’ written or oral notice. An annual or special meeting shall be held at the home office of the savings bank or at another place within a county in which the savings bank maintains an office if specifically designated in the notice of the meeting.