S.D. Codified Laws § 47-1A-721
Voting entitlement of shares
Except as provided in §§ 47-1A-721.1 and 47-1A-721.2 or unless the articles of incorporation provide otherwise, each outstanding share, regardless of class, is entitled to one vote on each matter voted on at a shareholders' meeting. Only shares are entitled to vote.
Source: SL 2005, ch 239, § 96.