SOS Business Search

Secretary of State Business Entity Search

Step-by-step guides for searching business registrations through every state's official Secretary of State lookup tool.

What is a Secretary of State business entity search?

Every state maintains a public registry of the businesses formed or registered to do business there. The Secretary of State's office — or an equivalent agency in some states — is typically the custodian of that registry. A business entity search is the public-facing lookup tool that lets anyone query it by business name, registered agent, or entity ID number.

People use these searches for a few different reasons. Someone forming a new LLC checks whether their preferred name is already taken before filing. A vendor or potential partner runs a search to confirm a company is in good standing before signing a contract. Attorneys, lenders, and due-diligence researchers pull entity details — registered agent address, formation date, officer names — as part of routine background work. Consumers sometimes use them to verify whether a business they're dealing with is legitimately registered.

Registration is handled at the state level, so the search tool, the fees, and the formation rules differ from one jurisdiction to the next. This site publishes step-by-step guides for all 51 jurisdictions — all 50 states plus Washington, D.C. It is an independent informational resource, not affiliated with any government agency.

Browse by State

Alabama
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
District of Columbia
Florida
Georgia
Illinois
Indiana
Kentucky
Louisiana
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Oklahoma
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming