S.D. Codified Laws § 58-30-187
Any documents, materials, or other information in the control or possession of the Division of Insurance that is furnished by the insurer, insurance producer, or an employee or agent thereof acting on behalf of the insurer or insurance producer, or obtained by the director in an investigation pursuant to §§ 58-30-180 to 58-30-193, inclusive, are confidential by law and privileged, are not subject to open records, freedom of information, sunshine, or other related laws, are not subject to subpoena, and are not subject to discovery or admissible in evidence in any private civil action. The director is authorized to use the documents, materials, or other information in the furtherance of any regulatory function or legal action brought as a part of the director's duties.
SDCL 58-30-187