Mo. Rev. Stat. » Chapter 417
Missouri Revised Statutes

Mo. Rev. Stat. § 417.455 (2026)

Misappropriation, actual or threatened may be enjoined

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  417.455.  Misappropriation, actual or threatened may be enjoined — injunction terminates, when — exceptional circumstances, defined. — 1.  Actual or threatened misappropriation may be enjoined.  Upon application to the court, an injunction shall be terminated when the trade secret has ceased to exist, but the injunction may be continued for an additional reasonable period of time in order to eliminate commercial advantage that otherwise would be derived from the misappropriation.

  2.  In exceptional circumstances, an injunction may condition future use upon payment of a reasonable royalty for no longer than the period of time for which use could have been prohibited.  Exceptional circumstances include, but are not limited to, a material and prejudicial change of position prior to acquiring knowledge or reason to know of misappropriation that renders a prohibitive injunction inequitable.

  3.  In appropriate circumstances, affirmative acts to protect a trade secret may be compelled by court order.

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(L. 1995 S.B. 80 & 88 § 3)

Notes of Decisions
Cited in 8 cases (4 in the last 5 years), 1997–2026 · leading case: Am. Fam. Mut. Ins. Co. v. Missouri Dep't of Ins., 169 S.W.3d 905 (Mo. Ct. App. 2005).
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Am. Fam. Mut. Ins. Co. v. Missouri Dep't of Ins., 169 S.W.3d 905 (Mo. Ct. App. 2005). · cites it 2× “Section 417.455 authorizes the courts of this State to grant an injunction to prohibit the misappropriation of a trade secret.”
Carboline Co. v. Lebeck, 990 F. Supp. 762 (E.D. Mo. 1997). “§ 417.455. The Act defines "trade secret" as information, including but not limited to, technical or nontechnical data, a formula, pattern, compilation, program, device, method, technique, or process, that (a) [d]erives independent economic value .”
Whiteside Biomechanics v. Sofamor Danek Grp., 88 F. Supp. 2d 1009 (E.D. Mo. 2000). “provides that "[u]pon application to the court, an injunction shall be terminated when the trade secret has ceased to exist, but the injunction may be continued for an additional reasonable period of time in order to eliminate commercial advantage that otherwise would be derived…”
C. Pepper Logistics, LLC v. Lanter Delivery Sys., LLC, No. 4:20-cv-01444, 2021 WL 3725680 (E.D. Mo. Aug. 23, 2021). · cites it 2× “§ 1836 (b)(1) (Count IX); injunction pursuant to Mo. Rev. Stat. § 417.455 and 765 Ill. Comp.”
MWG Enter., LLC v. ETS Wound Care, LLC, 586 F. Supp. 3d 946 (E.D. Mo. 2022). · cites it 2× “§ 417.455 for the proposition that the DTSA and MUTSA make it illegal to misappropriate trade secrets “for the purpose [of receiving an] economic benefit.”
Perficient, Inc. v. Munley, No. 4:19-cv-01565, 2019 WL 4247056 (E.D. Mo. Sept. 5, 2019). “§417.455 . The owner of a misappropriated trade secret may bring a civil action for injunctive relief and damages.”
LifeScience Tech. LLC v. Mercy Health, 632 F. Supp. 3d 949 (E.D. Mo. 2022). “STAT § 417.455. To state a claim for misappropriation of a trade secret under the DTSA, a plaintiff must show that “the trade secret is related to a product or service used in, or intended for use in, interstate or foreign commerce.”
Control Tech. & Solutions, LLC v. Omni Energy Partners, LLC, No. 4:21-cv-00686 (E.D. Mo. May 22, 2026). “§ 417.455 (1) (providing injunctive relief as a remedy), Defendants “reincorporate their earlier argument that the relevant materials are not trade secrets.”
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