Wis. Stat. § 225.03

At least 25 percent of the capital stock authorized in the articles of incorporation shall be paid into the treasury of the corporation in cash before the corporation shall be authorized to transact any business other than such as relates to its organization. At least a majority of the common stock shall at all times be held by residents of this state or by persons, firms or corporations engaged in doing business therein. Common stock shall at all times be held by stockholder members who have their residences or principal places of business in not less than 36 counties in this state.