EnglishEspañol
Wisconsin flag

Wisconsin

Wisconsin Trade Secret Laws: UTSA, Remedies & Deadlines

Independently fact-checked against primary sources (last audited August 17, 2026). · Reviewed by the RecordingLaw editorial team. · Law checked current as of August 17, 2026. · 3 primary sources cited on this page. How we verify our legal content

Wisconsin Trade Secret Laws: UTSA, Remedies & Deadlines

Frequently Asked Questions

What is Wisconsin's limitations period for a trade secret claim?

Three years from the date the misappropriation was discovered or, by the exercise of reasonable diligence, should have been discovered. The federal DTSA provides the same three-year period from discovery (18 U.S.C. § 1836(d)), so both windows align and run concurrently.

What types of information qualify as trade secrets in Wisconsin?

Under Wis. Stat. § 134.90(1)(c), any formula, pattern, compilation, program, device, method, technique, or process can qualify if it derives independent economic value from not being generally known or readily ascertainable and the owner takes reasonable steps to protect it. Customer lists, pricing strategies, manufacturing processes, source code, and proprietary algorithms are common candidates, each subject to the two-part test.

Can a Wisconsin employer sue a former employee for misappropriating trade secrets?

Yes. If a former employee discloses or uses protectable Wisconsin trade secrets in breach of a confidentiality agreement or other duty of confidentiality, the employer may bring a civil claim under Wis. Stat. § 134.90. General skills, experience, and industry knowledge an employee develops during employment are not trade secrets and cannot be restricted. The distinction between protected information and general know-how is often disputed and depends on specific facts.

Is reverse engineering a trade secret legal in Wisconsin?

Wis. Stat. § 134.90(1)(a) gives a nonexclusive list of improper means, including theft, bribery, misrepresentation, espionage and breach or inducement of a confidentiality duty. It does not expressly identify reverse engineering or independent development as safe harbors. The distinction between proper and improper means supports examining how information was obtained, including whether confidentiality or use restrictions apply.

What does the DTSA whistleblower-immunity notice require for Wisconsin employers?

Under 18 U.S.C. § 1833(b)(3), any Wisconsin employer who enters into or updates a confidentiality agreement, NDA, or employment agreement after May 11, 2016 must notify the individual that they may disclose a trade secret in confidence to a government official or attorney to report a suspected legal violation without civil or criminal liability. Omitting this notice forfeits the employer's right to seek exemplary damages and attorney fees in a DTSA action against that individual.

Updates

Clarified state trade secret rules, remedies, and applicable deadlines.

Independently fact-checked against the cited primary sources; governing law re-checked for recent changes

Governing law re-checked for recent changes

Re-pinned Wisconsin's trade secret statute citations to the bundle-confirmed structure of Wis. Stat. 134.90 (misappropriation is subsection (2), injunctive relief (3), damages/exemplary damages (4)(a)/(4)(b), tort-displacement (6)), corrected the attorney-fee standard from "willful and malicious" to the statute's actual "willful and deliberate" wording, and removed the unconfirmed section pincite from the three-year limitations-period claim (that specific subsection remains unverified) while keeping the underlying claim.

Removed an incorrect subsection pin: the reverse-engineering discussion cited Wis. Stat. 134.90(1)(b), which is the definition of readily ascertainable information, not a reverse-engineering provision.

Governing law re-checked for recent changes

Reviewed and approved by an editor

Sources and References

  1. Wisconsin Uniform Trade Secrets Act, Wis. Stat. § 134.90(docs.legis.wisconsin.gov).gov
  2. Defend Trade Secrets Act, 18 U.S.C. §§ 1836-1839(law.cornell.edu)
  3. Uniform Trade Secrets Act (Uniform Law Commission)(uniformlaws.org)
  4. Economic Espionage Act, 18 U.S.C. §§ 1831-1832(law.cornell.edu)
  5. Wis. Stat. § 134.90(docs.legis.wisconsin.gov).gov
  6. Wis. Stat. § 943.205(docs.legis.wisconsin.gov).gov
Share: