How to search Wisconsin business entities online
Updated August 2026
Quick Answer
Wisconsin has no Secretary of State for business filings — search at apps.dfi.wi.gov/apps/corpsearch/search.aspx, run by the Department of Financial Institutions. Search by entity name (exact phrase, all words, or starts with) or, in Advanced Search, registered agent name — free, no account or CAPTCHA. The older wdfi.wi.gov domain no longer resolves — use dfi.wi.gov for general information and apps.dfi.wi.gov specifically for the entity search itself.
- Go to apps.dfi.wi.gov/apps/corpsearch/search.aspx.
- Search by entity name, or use Advanced Search for registered agent name.
- Review the result — note DFI doesn't index officer or member names.
Wisconsin has no Secretary of State for business filings
Wisconsin does not have a Secretary of State that handles business entity registration. That role belongs to the Department of Financial Institutions (DFI), Division of Corporate and Consumer Services — the agency that operates the entity search and processes filings.
What the search covers
The database covers dozens of entity type classifications registered with the DFI: domestic and foreign corporations (including close corporations and cooperatives), LLCs, LPs, LLPs, common law trusts, and other registered types. The DFI does not register sole proprietorships, general partnerships, or DBAs — those are not state-registered entities in Wisconsin.
Search options
Basic search supports entity name lookup with three match modes — exact phrase, all words, or starts with these words. The Advanced Search adds:
- Registered Agent Name
- Entity Type Filter — dozens of classification codes
- Entity Status Filter — currently in existence, no longer in existence, or both
- Current vs. Historical Names — whether to search former entity names
- Registration Date Range
A separate Name Availability Search tool is available for proposed name checks. There is no officer or member name search — the DFI explicitly does not store officer names, member names, federal EINs, or phone numbers in its public database.
Annual report due dates — quarter-based system
Wisconsin annual reports are due by the last day of the calendar quarter in which the entity's formation anniversary falls. A corporation formed in February has its anniversary in the first quarter, so its annual report is due March 31. An LLC formed in August has its anniversary in the third quarter and is due September 30. Foreign entities always file by March 31 regardless of their registration date.
How Wisconsin's administrative dissolution actually works
Wisconsin's search only shows a binary status — currently in existence or no longer in existence — but the process behind it is more specific. The DFI checks quarterly for entities that haven't filed an annual report in a few years, and works through a notice sequence: first a mailed notice to the registered agent, then to the principal office if that's returned undeliverable, and if both fail, the entity's name goes on a public Notice of Administrative Dissolution list. From that publication date, there's a 60-day window to file the missing report before the entity is actually dissolved and moves to Wisconsin's Certificate of Administrative Dissolution list.
Two things trip people up here. First, Wisconsin charges no late fees or penalties for the dissolution itself, unlike most states. Second, filing a final tax return with the Wisconsin Department of Revenue or the IRS does not dissolve an entity — only filing Articles of Dissolution with DFI does, so a business that simply stopped filing taxes can still show up as active for years until DFI's own notice process catches up to it.
Frequently Asked Questions
Does Wisconsin's DFI register sole proprietorships or DBAs?
No. The Wisconsin Department of Financial Institutions does not register sole proprietorships, general partnerships, or DBAs — these are not state-registered entities in Wisconsin, so they won't appear in the entity search.
Can I search Wisconsin businesses by officer or member name?
No. Wisconsin's DFI explicitly does not store officer names, member names, federal EINs, or phone numbers in its public database, so there is no officer or member name search option available.
When is a Wisconsin LLC's annual report due?
Wisconsin uses a quarter-based system: the report is due by the last day of the calendar quarter containing the entity's formation anniversary. An LLC formed in August, for example, falls in the third quarter and owes its report by September 30.
How long does Wisconsin give a business to respond before administrative dissolution?
60 days from the date the entity's name is published on DFI's Notice of Administrative Dissolution list — DFI reaches that point only after a mailed notice to the registered agent and then the principal office both go unanswered.
Does filing a final tax return dissolve a Wisconsin business?
No — filing a final return with the Wisconsin Department of Revenue or the IRS doesn't dissolve anything. Only filing Articles of Dissolution with the DFI actually ends the entity, so a business that just stopped filing taxes can still show as active in the search for years.