How to search South Dakota business entities online

What the search covers

The database covers all entity types registered with the Secretary of State: domestic and foreign LLCs (including series LLCs), corporations (profit and nonprofit), LLPs, limited partnerships, cooperatives, and DBA/fictitious name registrations for sole proprietorships and other businesses. Trademarks are searchable through a separate tool, the Trademark Search, also on sosenterprise.sd.gov.

Search options

Two primary search modes are available:

• Business Name — with "Starts With" or "Contains" match options; an "Active Entities Only" checkbox filters to currently active records
• Business ID — direct lookup by the SOS-assigned entity identifier

Registered agent searches use a separate portal, the RA Search, which searches by agent name or RA number. No officer or director search is available in the public portal.

Annual report — anniversary-month due date

South Dakota annual reports are due on the first day of the entity's anniversary month each year (limited partnerships and business trusts are exempt from this requirement). An entity formed on July 20 has its annual report due July 1 each subsequent year. Reports may be filed starting two months before the due date. Entities that have not filed become delinquent two months after the due date, at which point a $55 late fee applies per the Secretary of State's fee schedule, and continued non-filing can lead to administrative dissolution. Nonprofit corporations must still file but are exempt from the late fee.