Wisconsin Business Entity Search

Find Wisconsin LLCs, corporations, and registered businesses. Cross-referenced with the Wisconsin DFI and 12+ state registries.

Browse the Wisconsin registry →

How to search Wisconsin business entities

Every business that operates legally in Wisconsin files a public record with the Wisconsin Department of Financial Institutions (DFI). That record names the entity, identifies its registered agent for service of process, and tracks every formal filing through dissolution. Those records are open to anyone — that is the legal definition of a public registry.

Corporate.AI is a free, structured front door to Wisconsin's public business filings. We mirror the state's data, normalize it against records from 49 other jurisdictions, and add the cross-state intelligence (shared officers, shared registered agents, NAICS sector classification, beneficial-ownership signals) that a single-state portal cannot provide. Use the search above to look up any Wisconsin entity by name, by primary filing number, or by officer.

For absolute freshness — same-day filings, formal certificates of good standing, certified document copies — you should also have the Wisconsin DFI portal bookmarked. We link directly to it from this page.

About the Wisconsin DFI

The Wisconsin Department of Financial Institutions (DFI) is the office of record for every business entity formally registered in Wisconsin. They maintain the public registry, accept new filings, and issue certificates of good standing. Corporate.AI mirrors and normalizes this data alongside records from 49 other jurisdictions.

Domestic LLC filing fee
~$130
Domestic Corp filing fee
~$100

Wisconsin business entity search FAQ

How do I search Wisconsin business entities?▶

Use the search box above to query Corporate.AI for any Wisconsin-registered LLC, corporation, nonprofit, or partnership. You can also search directly at the Wisconsin DFI's public registry portal. Corporate.AI consolidates Wisconsin entity records with cross-state filings (foreign registrations, officer overlap, registered-agent networks) so a single search returns more context than the state portal alone.

Is Wisconsin business entity search free?▶

Yes. Public Wisconsin business filings are open records. Corporate.AI never charges to look up an entity, its registered agent, officers, or filing history. The Wisconsin DFI also offers free public search; premium services (certified copies, certificates of good standing) typically cost $130 or more depending on document type.

What information is included in a Wisconsin entity search?▶

Each Wisconsin entity record on Corporate.AI includes the registered legal name, entity type (LLC, Corporation, LP, Nonprofit), formation date, current status, primary filing number assigned by the Wisconsin DFI, registered agent (when published), officer roster (when published), and full filing history. We also surface entities that share officers, registered agents, or NAICS sector classifications across all 50 states.

How do I get a Wisconsin certificate of good standing?▶

A certificate of good standing (sometimes called a certificate of existence or status certificate) must be issued by the Wisconsin DFI directly — Corporate.AI does not issue official certificates. You can typically request one online from the Wisconsin DFI for $33–$50 with same-day or 24-hour turnaround. The certificate confirms the entity is in good standing as of the issuance date.

How do I look up a registered agent in Wisconsin?▶

Every Wisconsin business entity is required to designate a registered agent — a person or company authorized to receive service of process at a Wisconsin street address. Corporate.AI's registered-agent index lets you reverse-search: given an agent name, see every Wisconsin entity that has designated them. This pattern is useful for due diligence, beneficial-ownership analysis, and competitive research. The Wisconsin DFI's portal supports forward lookup (entity → agent) but typically not reverse lookup.

What's the difference between an LLC and a corporation in Wisconsin?▶

A Wisconsin LLC (limited liability company) is the most common entity type for small businesses — it offers liability protection with pass-through taxation and minimal corporate formalities. A Wisconsin corporation (typically a C-corp or S-corp) is owned by shareholders, governed by a board, and is the standard vehicle for raising outside investment. Formation fees are similar — $130 for an LLC vs $100 for a corporation in Wisconsin as of 2026 — but the tax, governance, and capital-raising profiles differ significantly.

How recent is the Wisconsin business data on Corporate.AI?▶

Wisconsin entity records on Corporate.AI are refreshed from the Wisconsin DFI's public feed on the cadence the state publishes — daily, weekly, or monthly depending on jurisdiction. Each entity page displays a "last refreshed" timestamp so you can verify how recent the underlying record is. For absolute freshness, cross-check against the Wisconsin DFI's live portal (linked above) before relying on a record for legal or contractual purposes.

Can I download Wisconsin business entity data?▶

Yes. Corporate.AI's REST API and MCP server expose Wisconsin entity records in machine-readable form for licensed use cases — KYC/AML programs, sales prospecting, journalism, academic research. Bulk downloads of the Wisconsin DFI's underlying data are typically available directly from the state, sometimes free and sometimes for a fee. See our /api page for licensing terms.