Where did the inevitable disclosure doctrine come from?
From PepsiCo, Inc. v. Redmond, 54 F.3d 1262 (7th Cir. 1995), which the United States Patent and Trademark Office describes in its October 2021 publication The Defend Trade Secrets Act at Five as the seminal case on the doctrine. Applying the Illinois Trade Secrets Act, 765 ILCS 1065/3(a), the Seventh Circuit held at 1269 that “a plaintiff may prove a claim of trade secret misappropriation by demonstrating that defendant’s new employment will inevitably lead him to rely on the plaintiff’s trade secrets.”
The facts mattered. A senior PepsiCo beverage executive had moved to Quaker Oats, had signed confidentiality agreements at both companies, and told the court that if he faced a situation at Quaker involving PepsiCo information he would seek advice from Quaker’s in-house counsel and refrain from deciding. The Seventh Circuit affirmed anyway. It recorded that the district court “concluded on the basis of that presentation that unless Redmond possessed an uncanny ability to compartmentalize information, he would necessarily be making decisions about Gatorade and Snapple by relying on his knowledge of PCNA trade secrets,” and it compared the former employer’s position to that of “a coach, one of whose players has left, playbook in hand, to join the opposing team before the big game.” The order the Seventh Circuit affirmed enjoined him “from assuming his responsibilities at Quaker through May, 1995,” while “preventing him forever from disclosing PCNA trade secrets and confidential information” — and the court noted that if the injunction “permanently enjoined Redmond from assuming these duties at Quaker, the defendants’ argument would be stronger.”
The underlying tension is older than PepsiCo. The United States Patent and Trademark Office publication The Defend Trade Secrets Act at Five traces the framing through Milgrim on Trade Secrets to E. I. du Pont de Nemours & Co. v. American Potash & Chemical Corp., 200 A.2d 428 (Del. Ch. 1964), which set an employer’s rights in its trade secrets against an individual’s right to exploit his talents and pursue his calling without undue hindrance from a prior employer.
What does the inevitable disclosure doctrine actually require a plaintiff to show?
It varies by state, and in the jurisdictions that entertain it at all the showing is considerably more than “this person knows things.” EarthWeb, Inc. v. Schlack, 71 F. Supp. 2d 299, 310 (S.D.N.Y. 1999), set out three factors: whether the employers “are direct competitors providing the same or very similar products or services”; whether “the employee’s new position is nearly identical to his old one, such that he could not reasonably be expected to fulfill his new job responsibilities without utilizing the trade secrets of his former employer”; and whether “the trade secrets at issue are highly valuable to both employers.” The same passage says that “in its purest form, the inevitable disclosure doctrine treads an exceedingly narrow path through judicially disfavored territory” and that, absent evidence of actual misappropriation, “the doctrine should be applied in only the rarest of cases.”
Courts applying it have also tended to have something else in the record. The United States Patent and Trademark Office publication The Defend Trade Secrets Act at Five notes that the Seventh Circuit in PepsiCo affirmed the injunction “in acknowledgement of other bad acts by the defendant,” and a court applying Georgia law in Cotiviti, Inc. v. Deagle, 501 F. Supp. 3d 243, 262 (S.D.N.Y. 2020), refused relief in part because of the plaintiff’s “failure to provide factual support for its bare assertions that misappropriation is inevitable.”
The statute points the same way. The Defend Trade Secrets Act permits an injunction against threatened misappropriation, but provides at 18 U.S.C. section 1836(b)(3)(A)(i)(I) that conditions placed on employment “shall be based on evidence of threatened misappropriation and not merely on the information the person knows.” On that reading the doctrine is not a separate cause of action — it is one route to proving threatened misappropriation, and it inherits that element’s evidentiary demands.
Which states have rejected the inevitable disclosure doctrine, and which have applied it?
California has rejected it as completely as a court can. Bayer Corp. v. Roche Molecular Systems, Inc., 72 F. Supp. 2d 1111, 1120 (N.D. Cal. 1999), stated that “California trade-secrets law does not recognize the theory of inevitable disclosure; indeed, such a rule would run counter to the strong public policy in California favoring employee mobility,” and required “an actual use or an actual threat.” Three years later Whyte v. Schlage Lock Co., 101 Cal. App. 4th 1443 (2002), closed the question, quoting Del Monte Fresh Produce Co. v. Dole Food Co., 148 F. Supp. 2d 1326, 1337 (S.D. Fla. 2001), for the proposition that “a court should not allow a plaintiff to use inevitable disclosure as an after-the-fact noncompete agreement to enjoin an employee from working for the employer of his or her choice,” and adding at 1463: “Lest there be any doubt about our holding, our rejection of the inevitable disclosure doctrine is complete.”
Maryland’s highest court reached the same destination by a different route. In LeJeune v. Coin Acceptors, Inc., 381 Md. 288, 849 A.2d 451 (2004), a case of first impression under the Maryland Uniform Trade Secrets Act, the Court of Appeals of Maryland found Whyte’s reasoning persuasive, observed that “Maryland has a policy in favor of employee mobility similar to that of California,” noted that the employer there “decided not to enter into a confidentiality agreement or a covenant not to compete” with the employee at all, and concluded “that the theory of ‘inevitable disclosure’ cannot serve as a basis for granting a plaintiff injunctive relief under MUTSA.” It vacated the preliminary injunction while leaving the trial court’s misappropriation finding intact.
Illinois is on the other side, because Illinois is where PepsiCo, Inc. v. Redmond lives and the Illinois Trade Secrets Act, 765 ILCS 1065/3(a), is the statute it applied. Even so, federal courts in Illinois read the theory narrowly. Packaging Corp. of America, Inc. v. Croner, 419 F. Supp. 3d 1059, 1070 (N.D. Ill. 2020), dismissed the trade secret counts that carried it, noting that plaintiffs who have stated such claims in that district alleged that the defendant “could not operate or function” in the new position without relying on the trade secrets — a phrase the court drew from Strata Marketing, Inc. v. Murphy, 317 Ill. App. 3d 1054, 740 N.E.2d 1166, 1179 (1st Dist. 2000). Beyond California, Maryland, New York and Illinois, this Institute names no state here without a decision or statute of that state to point to.
The practical point is the one the United States Patent and Trademark Office publication The Defend Trade Secrets Act at Five makes plainly: “States vary in their acceptance and application of the doctrine.” A summary that says the doctrine “is” or “is not” the law without naming a state is not telling you anything, and which state’s law governs is itself frequently contested.
How does the inevitable disclosure doctrine interact with noncompete law and the Federal Trade Commission’s noncompete rule?
The central objection to the doctrine is that it produces a noncompete nobody negotiated. Whyte v. Schlage Lock Co. described the result as “not merely an injunction against the use of trade secrets, but an injunction restricting employment,” and located the defect in its timing: “The covenant is imposed after the employment contract is made and therefore alters the employment relationship without the employee’s consent.” EarthWeb made the same point from the bargaining side, observing that a confidentiality agreement “may be wielded as a restrictive covenant, depending on how the employer views the new job its former employee has accepted.”
That is why the doctrine tends to fail hardest in states that are hostile to restraints on mobility as a matter of statute. California Business and Professions Code section 16600(a) provides that “Except as provided in this chapter, every contract by which anyone is restrained from engaging in a lawful profession, trade, or business of any kind is to that extent void.” Two sections added effective January 1, 2024 go further. Section 16600.1(a), added by Stats. 2023, ch. 828 (AB 1076), provides that “It shall be unlawful to include a noncompete clause in an employment contract, or to require an employee to enter a noncompete agreement, that does not satisfy an exception in this chapter.” Section 16600.5(a), added by Stats. 2023, ch. 157 (SB 699), provides that “Any contract that is void under this chapter is unenforceable regardless of where and when the contract was signed,” and section 16600.5(c) provides that an employer “shall not enter into a contract with an employee or prospective employee that includes a provision that is void under this chapter.” A doctrine whose output is a court-imposed employment restraint has little room to operate against that.
The federal picture is settled, and it is narrower than it briefly appeared. The Federal Trade Commission published its Non-Compete Clause Rule at 89 Fed. Reg. 38342 (May 7, 2024). The United States District Court for the Northern District of Texas held the rule unlawful and set it aside in Ryan, LLC v. Federal Trade Commission, 746 F. Supp. 3d 369 (N.D. Tex. 2024), having concluded that the Commission promulgated it in excess of its statutory authority and that the rule was arbitrary and capricious. On September 5, 2025 the Commission voted 3-1 to dismiss its appeals in Ryan, LLC v. FTC, No. 24-10951 (5th Cir.), and Properties of the Villages v. FTC, No. 24-13102 (11th Cir.), and to accede to that vacatur. The Commission then conformed the regulations to the courts: a final rule published at 91 Fed. Reg. 6507 (Feb. 12, 2026), effective on publication, removed and reserved 16 C.F.R. part 910. So as of September 2026 there is no federal noncompete rule to interact with, and the mobility question remains in state law — the same law that decides whether an inevitable disclosure theory is available at all.
Does the Defend Trade Secrets Act permit an inevitable disclosure injunction?
The statute does not embrace the doctrine, and it does not clearly abolish it either. The Defend Trade Secrets Act provides at 18 U.S.C. section 1836(b)(3)(A)(i)(I) that a court may grant an injunction to prevent actual or threatened misappropriation, provided the order does not “prevent a person from entering into an employment relationship, and that conditions placed on such employment shall be based on evidence of threatened misappropriation and not merely on the information the person knows.” Subsection (II) adds that the order may not “otherwise conflict with an applicable State law prohibiting restraints on the practice of a lawful profession, trade, or business.” Read together, those two clauses aim directly at an injunction resting on nothing but knowledge.
Congress knew the states disagreed. The Senate Judiciary Committee report, S. Rep. No. 114-220 (2016), noted that “courts interpreting State trade secret laws have reached different conclusions on the applicability of the inevitable disclosure doctrine,” and said that the remedies provided in the injunction provision “are intended to coexist with, and not to preempt, influence, or modify applicable State law governing when an injunction should issue in a trade secret misappropriation matter.”
Federal courts have accordingly split, and have usually resolved the question through the state law in the case rather than through the federal text. The United States Patent and Trademark Office publication The Defend Trade Secrets Act at Five describes UCAR Technology (USA) Inc. v. Li, No. 5:17-cv-01704-EJD (N.D. Cal. Dec. 15, 2017), in which the court struck inevitable disclosure allegations from a complaint because “California courts have resoundingly rejected claims based on the ‘inevitable disclosure’ theory,” relying on California law rather than on the Defend Trade Secrets Act; Packaging Corp. of America v. Croner analyzing the issue under the Illinois PepsiCo factors; and Cotiviti, Inc. v. Deagle denying relief under the federal statute on the same grounds it denied relief under the Georgia Trade Secrets Act. The publication’s own summary is that plaintiffs “may improve their chances of obtaining injunctions in DTSA cases where they include a state trade secret claim and the state recognizes the inevitable disclosure doctrine.”
None of this is a substitute for the evidence. Whether a departure produced a record of anything is a forensic question, and the material that answers it expires quickly — see what to preserve in the first week after a departure and misappropriation evidence. A claim also still has to identify what is said to be secret, covered in how specifically you have to identify a trade secret and what counts as reasonable measures. What any of it is worth is a damages question for the Economic Damages Institute at economicdamagesinstitute.com.