How to search South Dakota business entities online
Updated August 2026
Official Resource
South Dakota Official SOS WebsiteSouth Dakota business entity records are searchable through the SOSEnterprise portal at sosenterprise.sd.gov, operated by the South Dakota Secretary of State. Public searching requires no account; filing and ordering certificates require a free SOSEnterprise registration.
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.
Frequently Asked Questions
How do I search South Dakota business registered agents?
Through a separate tool called RA Search on sosenterprise.sd.gov, which looks up entities by registered agent name or RA number — separate from the main business entity search, which has no officer or director lookup.
Can I filter South Dakota business search results to active entities only?
Yes. South Dakota's Business Name search includes an 'Active Entities Only' checkbox that filters out dissolved or inactive records, along with Starts With and Contains matching options for the name itself.
When are South Dakota annual reports due?
On the first day of the entity's anniversary month each year (limited partnerships and business trusts are exempt). Entities become delinquent two months after the due date, triggering a $55 late fee — though nonprofit corporations are exempt from that fee.
This guide is informational only and is not affiliated with the South Dakota Secretary of State's office. Verify current procedures at the official state website. Last verified: August 2026.