Minnesota's Antitrust Act Copies the Sherman Act, Then Breaks From It in the One Place Plaintiffs Care About

Read the two operative prohibitions of the Minnesota Antitrust Law of 1971 next to the two operative prohibitions of the Sherman Act and the family resemblance is unmistakable. One forbids contracts, combinations, and conspiracies in restraint of trade. The other forbids monopolizing. Minnesota shortened the sentences and dropped the interstate-commerce language, and that is most of the difference.

Then the act reaches its damages section, and the resemblance stops.

Minn. Stat. § 325D.57 gives treble damages to a person “injured directly or indirectly.” Four words that put Minnesota on the opposite side of the most consequential standing question in American antitrust law. This article walks the act — what it prohibits, who enforces it, what it exempts, and how long you have — and then spends the time where it belongs, on the divergence.

Two sections that mirror two federal ones

Two textual differences are worth pausing on.

Minnesota’s § 325D.51 contains the word “unreasonable” on its face. The federal section says “in restraint of trade,” and the reasonableness limitation is a product of judicial construction. Minnesota’s Legislature wrote it into the statute.

Minnesota’s § 325D.52 states a purpose element. Monopoly power is unlawful when established, maintained, used, or attempted “for the purpose of affecting competition or controlling, fixing, or maintaining prices.” The federal section has no comparable phrase in its text.

And the definitions are deliberately expansive. Section 325D.50 defines “trade or commerce” as “any economic activity of any type whatsoever involving any commodity or service whatsoever,” “service” as “any kind of activity performed in whole or in part for financial gain,” and “contract, combination, or conspiracy” as “any agreement, arrangement, collusion, or understanding.”

Section 325D.54 then sets the territorial reach: the act applies to any contract, combination, or conspiracy “when any part thereof was created, formed, or entered into in this state,” and to any such agreement “wherever created, formed, or entered into,” and to any establishment, maintenance, use, or attempted use of monopoly power, “whenever any of the foregoing affects the trade or commerce of this state.”

And § 325D.66 forecloses the obvious removal-adjacent argument in one sentence: “No action under sections 325D.49 to 325D.66 shall be barred on the ground that the activity or conduct complained of in any way affects or involves interstate or foreign commerce.”

The harmony rule is not in the statute

It is commonly said that Minnesota’s antitrust act is to be construed in harmony with federal antitrust law where the language is similar. That proposition is worth stating carefully, because the direction to do so does not appear in the act.

For this article I retrieved the text of §§ 325D.49, 325D.50, 325D.51, 325D.52, 325D.53, 325D.54, 325D.55, 325D.56, 325D.57, 325D.58, 325D.59, 325D.62, 325D.64, and 325D.66 from the Office of the Revisor of Statutes. None of them contains a construction provision directing courts to follow federal antitrust law or judicial interpretations of comparable federal statutes. Section 325D.49 is a one-sentence citation provision: “Sections 325D.49 to 325D.66 may be cited as the ‘Minnesota Antitrust Law of 1971.’” That is all it says.

This matters, and not as a technicality. Whatever weight federal antitrust doctrine carries in a Minnesota antitrust case, it does not come from a legislative command inside the act. It is a product of how Minnesota courts have treated statutory language that resembles federal language — a body of decisional law this article does not summarize and states no rule about. The practical consequence is that a party arguing federal doctrine into a Minnesota antitrust case is making a persuasive argument about parallel text, not invoking a statutory instruction. And on any point where the Minnesota text is not parallel, the argument for importing federal doctrine has to be made from something other than the resemblance.

Section 325D.57 is exactly such a point.

What the statute declares unreasonable without further proof

Section 325D.53, subd. 1 is a legislative per se list. Its opening line is the operative move:

Without limiting section 325D.51, the following shall be deemed to restrain trade or commerce unreasonably and are unlawful:

Then three categories:

(1) Horizontal agreements between persons in competition — “for the purpose or with the effect of affecting, fixing, controlling or maintaining the market price, rate, or fee of any commodity or service”; agreements “affecting, fixing, controlling, maintaining, limiting, or discontinuing the production, manufacture, mining, sale or supply” of a commodity or service “for the purpose or with the effect of” affecting price; and agreements “allocating or dividing customers or markets, functional or geographical, for any commodity or service.”

(2) Bid rigging on public contracts — an agreement whereby, in the letting of any public contract, “(a) the price quotation of any bid is fixed or controlled, (b) one or more persons refrains from the submission of a bid, or (c) competition is in any other manner restrained.”

(3) Concerted refusals to deal — “[a] contract, combination, or conspiracy between two or more persons refusing to deal with another person,” excepting a refusal to deal “by associations, trading boards, or exchanges when predicated upon a failure to comply with rules of membership.”

Note the “or with the effect of” language in clause (1). Price fixing under the Minnesota statute does not require proof that raising price was the purpose. Effect will do, on the face of the text.

Subdivisions 2 and 3 are an unusual feature of the Minnesota act: a set of anti-boycott provisions declaring it an unreasonable restraint to exclude a United States person from a business transaction on the basis of sex, race, color, religion, ancestry, national origin, or on the basis of that person’s business with persons of a particular characteristic or a particular country — together with certifications, letters of credit, and compliance agreements implementing such a policy. Subdivision 3 voids agreements requiring a party to violate subdivision 2 and bars recovery on them. These sit inside the antitrust chapter and carry its remedies.

The divergence: § 325D.57 and the indirect purchaser

Here is the section, in full:

Any person, any governmental body, or the state of Minnesota or any of its subdivisions or agencies, injured directly or indirectly by a violation of sections 325D.49 to 325D.66, shall recover three times the actual damages sustained, together with costs and disbursements, including reasonable attorneys’ fees. In any subsequent action arising from the same conduct, the court may take any steps necessary to avoid duplicative recovery against a defendant.

Four features.

1. Treble damages are mandatory in form. “[S]hall recover three times the actual damages sustained.” Plus costs and disbursements, plus reasonable attorney fees.

2. The plaintiff class is wide. Any person, any governmental body, the State, and its subdivisions and agencies.

3. The injury may be indirect. This is the divergence. The federal treble-damages provision, 15 U.S.C. § 15(a), provides that “any person who shall be injured in his business or property by reason of anything forbidden in the antitrust laws may sue therefor . . . and shall recover threefold the damages by him sustained, and the cost of suit, including a reasonable attorney’s fee.” That text does not say “directly.” The limitation came from the Supreme Court’s construction of it in Illinois Brick Co. v. Illinois, 431 U.S. 720 (1977), which reasoned from its earlier refusal to let defendants use a pass-on defense: “If a pass-on theory may not be used defensively by an antitrust violator (defendant) against a direct purchaser (plaintiff) that theory may not be used offensively by an indirect purchaser (plaintiff) against an alleged violator (defendant).” Id. at 720.

Minnesota’s statute says “directly or indirectly” in its own text. Whatever a federal court would do with a purchaser two or three levels down the distribution chain, § 325D.57 addresses that plaintiff expressly. (Minnesota courts have construed the scope of this language, including how far down the chain a plaintiff’s injury can be and still support recovery. This article does not state a rule on that question, and the presence of the words is not a promise that any particular plaintiff recovers.)

4. The second sentence is the answer to the objection. The central worry behind the federal rule is duplicative liability — the direct purchaser and the indirect purchaser each recovering for the same overcharge. Minnesota’s Legislature added, by amendment in 1984, that “[i]n any subsequent action arising from the same conduct, the court may take any steps necessary to avoid duplicative recovery against a defendant.” The statute identifies the problem and assigns it to the trial court rather than solving it by eliminating a category of plaintiff.

That is the whole design, and it is the reason the Minnesota act is worth reading in a case that also has a federal claim. The state statute is not a redundant add-on. In a distribution-chain case it can be the only claim that reaches the plaintiff who actually paid the overcharge.

Exemptions — and one that is broader than it looks

Section 325D.55 contains three.

Subdivision 1 exempts labor, electrical, agricultural, and horticultural organizations, “including organizations that operate aquatic farms, as defined in section 17.47, subdivision 3, that are instituted for the purpose of mutual help, and not conducted for profit,” and their members “when lawfully carrying out the legitimate objects” of the organization.

Subdivision 3 exempts agreements among employers or among labor unions made to further their position “in the course of the collective bargaining process.”

Subdivision 2(a) is the one to read first in any regulated industry:

Nothing contained in sections 325D.49 to 325D.66, shall apply to actions or arrangements otherwise permitted, or regulated by any regulatory body or officer acting under statutory authority of this state or the United States.

Read “or regulated” as a separate condition from “otherwise permitted.” On its face this reaches conduct that a state or federal regulator regulates, not merely conduct a regulator has authorized. That is a wide exemption, and in a case against a defendant in insurance, utilities, telecommunications, banking, health care, or transportation it is the first defense that will be raised. Paragraph (b) adds a specific inclusion for supreme-court-supervised reduced-fee legal services programs.

One targeted carve-back: § 325D.53, subd. 2 provides that “[t]he exemption contained in section 325D.55, subdivision 2, shall not apply to actions made unlawful under this subdivision” — the anti-boycott provisions.

Four years, continuing violations, and the government’s clock

Section 325D.64, subd. 1: “An action under sections 325D.49 to 325D.66, shall be forever barred unless commenced within four years of the date upon which the cause of action arose.” The same subdivision adds a rule that does real work in a long-running conspiracy case: “For purposes of this section, a cause of action for a continuing violation is deemed to arise at any time during the period of the violation.”

Subdivision 2 is the provision a private plaintiff should check before concluding a claim is stale. If the attorney general commences a proceeding under the act on behalf of the State, its departments or agencies, or its political subdivisions, the running of the limitations period “in respect of every right of action arising under sections 325D.49 to 325D.66, and based in whole or in part on any matter complained of in the aforementioned proceeding shall be suspended during the pendency thereof and for one year thereafter.” Where that suspension applies, the action is barred “unless commenced within the greater of either the period of suspension or four years after the date upon which the cause of action arose.”

A pending state antitrust enforcement action is therefore a tolling event for private claims based on the same matter. So is its first year of aftermath.

Enforcement and the follow-on case

The attorney general. Section 325D.59 authorizes the attorney general to investigate any alleged violation and, on reasonable cause to believe a violation “is imminent, is occurring or has occurred,” to bring an action on behalf of the State, its departments and agencies, or its political subdivisions. The section adds that the investigatory authority “shall include, but not be limited to, the authority provided for in section 8.31.”

Which cuts both ways. Minn. Stat. § 8.31, subd. 1 lists among the laws the attorney general investigates “the Antitrust Act (sections 325D.49 to 325D.66).” Subdivision 3a then provides that “[i]n addition to the remedies otherwise provided by law, any person injured by a violation of any of the laws referred to in subdivision 1 may bring a civil action and recover damages, together with costs and disbursements, including costs of investigation and reasonable attorney’s fees, and receive other equitable relief as determined by the court.” So the private-attorney-general remedy reaches an antitrust violation, alongside § 325D.57’s own treble-damages-and-fees provision. (The showing a private plaintiff must make to use § 8.31, subd. 3a is a matter of Minnesota decisional law that this article does not address. For the same statute in a different setting, see The UCC Gives Buyers Warranties, Then Hands Sellers Three Ways to Take Them Back.)

Penalties. Section 325D.56, subd. 1 sets a civil penalty of not more than $50,000 for a violation, and not more than $100,000 for failure to comply with a final judgment or decree issued for a violation. Subdivision 2 makes willful commission of any act enumerated in § 325D.53 a felony, punishable by a fine of not more than $50,000, imprisonment for not more than seven years, or both.

Injunctions. Section 325D.58 gives Minnesota courts jurisdiction to grant “such temporary, interlocutory, or permanent injunctive relief as is necessary to prevent and restrain violations.”

And the follow-on tool. Section 325D.62 provides that a final judgment or decree in a civil or criminal proceeding under the act brought by or on behalf of the State, its departments or agencies, or its political subdivisions, holding that a defendant violated the act, “shall be prima facie evidence against such defendant in any action or proceeding brought by any other party against such defendant under said sections as to all matters respecting which said judgment or decree would be an estoppel as between the parties thereto” — with a proviso: “this section shall not apply to consent judgments or decrees entered before any testimony has been taken.”

Read § 325D.62 together with § 325D.64, subd. 2 and the shape of a Minnesota follow-on case appears. A state enforcement action suspends the private limitations period while it is pending and for a year after; if it produces a litigated judgment rather than an early consent decree, that judgment is prima facie evidence for every private plaintiff who follows. The private case is built to be brought second.

What to do

If you think you have been overcharged by a cartel or squeezed by a monopolist:

1. Plead the state claim, not just the federal one. Section 325D.57’s “directly or indirectly” language is the reason. If you are not the defendant’s immediate customer, it may be the only provision that addresses you.
2. Check what the attorney general is doing. A pending state enforcement action under §§ 325D.49–325D.66 suspends your limitations period on claims based on the same matter, and for a year after — and a litigated judgment is prima facie evidence in your case under § 325D.62.
3. Date the conduct carefully. Four years under § 325D.64, subd. 1, with a continuing violation deemed to arise “at any time during the period of the violation.”
4. Get the fee provisions right. Section 325D.57 provides costs, disbursements, and reasonable attorney fees on top of treble damages, and § 8.31, subd. 3a supplies an additional statutory route.

If you are a business receiving one of these claims:

1. Start with § 325D.55, subd. 2. If a state or federal regulator permits or regulates the conduct, the exemption is written broadly and it is the shortest path out of the case.
2. Test the “unreasonable” element on the face of § 325D.51 — unless the conduct is one of the § 325D.53, subd. 1 categories, which the Legislature deemed unreasonable by statute.
3. Do not assume a federal doctrine transfers. The act contains no instruction to follow federal law, and on § 325D.57 the texts point in opposite directions.
4. Watch the criminal exposure. Section 325D.56, subd. 2 makes willful conduct within § 325D.53 a felony. Compliance counsel should be involved before litigation counsel is.

The observation

The interesting thing about the Minnesota Antitrust Law of 1971 is not that it copies federal law. Most state antitrust statutes do. It is where it stops copying.

The Legislature took the federal prohibitions nearly verbatim, kept the federal remedy structure — treble damages, costs, fees — and then, in 1984, amended the damages section to say “directly or indirectly” and to give trial courts the tool to prevent double recovery. That is a targeted, deliberate departure from a rule the Supreme Court had announced seven years earlier, and it is the only place in the act where Minnesota went out of its way to write something the federal statute does not say.

The design reads as a judgment about who antitrust law is for. Federal doctrine limits the treble-damages remedy to the defendant’s immediate customer largely for administrability reasons — apportioning an overcharge down a distribution chain is hard, and letting everyone sue risks paying the same damages twice. Minnesota’s answer was that those are real problems and that they are the trial court’s problems, not a reason to tell the consumer who actually paid the inflated price that the injury belongs to someone else.

Whether that is the better policy is contestable. What is not contestable is the drafting: on the question of who gets to sue, the Minnesota act and the federal act say different things, and the Minnesota act says it in the text. In a distribution-chain case brought in this state, that sentence is frequently the entire reason the case exists.

Madgett Law, LLC handles Minnesota business and competition disputes, including claims under the Minnesota Antitrust Law of 1971 and the related unfair-practices statutes in chapter 325D. If you believe your business or your customers have been harmed by price fixing, bid rigging, market allocation, or exclusionary conduct, send us a message or call 612-470-6529.

Sources: Minnesota Antitrust Law of 1971, Minn. Stat. §§ 325D.49–325D.66 — § 325D.49 (citation); § 325D.50, subds. 2–6 (definitions of commodity, service, contract/combination/conspiracy, person, and trade or commerce); § 325D.51 (unreasonable restraint of trade or commerce); § 325D.52 (establishment, maintenance, or use of monopoly power; purpose element); § 325D.53, subds. 1(1)–(3) (price fixing, output restriction, market and customer allocation, public-contract bid rigging, concerted refusals to deal, and the trading-board exception), subd. 2 (discriminatory acts; carve-back of the § 325D.55, subd. 2 exemption), and subd. 3 (discriminatory agreements void); § 325D.54 (scope of act; territorial reach); § 325D.55, subds. 1, 2(a)–(b), and 3 (exemptions); § 325D.56, subds. 1 and 2 (civil penalties of not more than $50,000 and $100,000; felony for willful § 325D.53 conduct, fine of not more than $50,000, imprisonment not more than seven years, or both) (History: 1971 c 865 s 8; 1977 c 173 s 2; 1989 c 290 art 6 s 4); § 325D.57 (damages; “injured directly or indirectly”; treble damages, costs and disbursements, reasonable attorneys’ fees; avoidance of duplicative recovery) (History: 1971 c 865 s 9; 1984 c 458 s 1); § 325D.58 (injunctive relief); § 325D.59 (authority of the attorney general; investigatory authority includes that provided in § 8.31); § 325D.62 (final judgment for the state as prima facie evidence; consent-judgment proviso); § 325D.64, subds. 1 and 2 (four-year limitations period; continuing violations; suspension during an attorney general proceeding and for one year thereafter); § 325D.66 (action not barred as affecting or involving interstate or foreign commerce). Minn. Stat. § 8.31, subd. 1 (the attorney general investigates, among others, “the Antitrust Act (sections 325D.49 to 325D.66)”) and subd. 3a (private civil action; damages, costs and disbursements, costs of investigation, reasonable attorney’s fees, and equitable relief). All Minnesota statutes from the Minnesota Office of the Revisor of Statutes, 2025 Minnesota Statutes. Federal: 15 U.S.C. § 1 (first sentence), 15 U.S.C. § 2, and 15 U.S.C. § 15(a), Office of the Law Revision Counsel, uscode.house.gov. Illinois Brick Co. v. Illinois, 431 U.S. 720 (1977) (quoted sentence verified against the official U.S. Reports text; see Lee’s citation review — the quotation is the Reporter’s Syllabus at page 720, not opinion text at page 729). Currency check: the sections of the act cited here carry History lines no later than 2008 (§ 325D.55), 1989 (§ 325D.56), and 1984 (§ 325D.57); the Recent History panel for § 325D.57 shows only 1971 c 865 s 9 and 1984 c 458 s 1. The § 8.31 History line includes a 2025 first-special-session entry (1Sp2025 c 13 art 8 s 8), confirmed to amend subdivision 2c only (consumer protection restitution account) — subdivisions 1 and 3a, as quoted here, are unaffected. No 2026 session entries appear on any page retrieved. The Revisor’s Table 2 filtered query is JavaScript-driven and was not retrievable; per-section History and Recent History panels were used instead.

This article is general legal information about Minnesota and federal law, not legal advice, and reading it does not create an attorney–client relationship. Whether particular conduct violates the Minnesota Antitrust Law, whether a particular plaintiff may recover under § 325D.57, and whether an exemption or limitations defense applies all depend on the facts, the market, and the parties. No outcome is promised or implied.