Templates Class Action Antitrust Class Action Complaint
Antitrust Class Action Complaint
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ANTITRUST CLASS ACTION COMPLAINT

TABLE OF CONTENTS

  1. Caption
  2. Nature of the Action
  3. Jurisdiction and Venue
  4. Parties
  5. Industry Background
  6. The Anticompetitive Conspiracy
  7. Effects of the Conspiracy
  8. Class Action Allegations
  9. Causes of Action
  10. Prayer for Relief
  11. Jury Demand

1. CAPTION

UNITED STATES DISTRICT COURT
[________________________________] DISTRICT OF [________________________________]

[________________________________], individually and on behalf of all others similarly situated, Case No.: [________________________________]
Plaintiff,
v. CLASS ACTION COMPLAINT
[________________________________]; [________________________________]; [________________________________]; and DOES 1-50, FOR VIOLATIONS OF FEDERAL ANTITRUST LAWS
Defendants.

2. NATURE OF THE ACTION

  1. This is a class action for treble damages and injunctive relief under Sections 4 and 16 of the Clayton Act, 15 U.S.C. §§ 15 and 26, arising from Defendants' conspiracy to [________________________________] (e.g., fix prices, allocate markets, rig bids, restrain trade) in the market for [________________________________] (product or service), in violation of Section 1 of the Sherman Act, 15 U.S.C. § 1.

  2. Beginning at least as early as [__/__/____] and continuing through [__/__/____] (the "Conspiracy Period"), Defendants and their co-conspirators entered into and implemented an agreement to [________________________________], resulting in artificially inflated prices paid by Plaintiff and Class members.

  3. As a direct result of Defendants' anticompetitive conspiracy, Plaintiff and Class members paid supra-competitive prices for [________________________________] and suffered damages.


3. JURISDICTION AND VENUE

  1. This Court has subject matter jurisdiction under 28 U.S.C. §§ 1331 and 1337 because this action arises under the federal antitrust laws, 15 U.S.C. §§ 1, 15, and 26.

  2. This Court has jurisdiction under the Class Action Fairness Act, 28 U.S.C. § 1332(d), because the aggregate amount in controversy exceeds $5,000,000 and at least one Class member is diverse from at least one Defendant.

  3. Venue is proper under 15 U.S.C. § 22 and 28 U.S.C. § 1391 because [________________________________] (Defendants transact business, the conspiracy was directed at, or effects were felt in this District).

  4. Defendants are subject to personal jurisdiction because they transacted business, maintained agents, or committed overt acts in furtherance of the conspiracy in this District.


4. PARTIES

Plaintiff

  1. Plaintiff [________________________________] is a [________________________________] (individual/corporation/entity) located in [________________________________]. During the Conspiracy Period, Plaintiff purchased [________________________________] (product/service) directly from one or more Defendants and paid artificially inflated prices as a result of Defendants' conspiracy.

Defendants

  1. Defendant [________________________________] is a [________________________________] incorporated in [________________________________] with principal offices at [________________________________]. During the Conspiracy Period, Defendant manufactured/sold/distributed [________________________________] in the United States. Defendant's approximate market share is [____]%.

  2. Defendant [________________________________] is a [________________________________] incorporated in [________________________________] with principal offices at [________________________________]. Defendant's approximate market share is [____]%.

  3. [Additional Defendants as applicable.]

  4. Defendants DOES 1-50 are persons or entities whose identities are presently unknown to Plaintiff who participated in the conspiracy alleged herein.


5. INDUSTRY BACKGROUND

  1. [________________________________] (describe the relevant product market, including what the product/service is, how it is sold, and key market characteristics).

  2. The relevant geographic market is [________________________________] (e.g., the United States / North America / specific region).

  3. The market is highly concentrated, with Defendants collectively controlling approximately [____]% of the market. The market is characterized by: [________________________________] (e.g., high barriers to entry, standardized products, inelastic demand, opportunities for competitor interaction at trade associations).

  4. The following market conditions facilitated the conspiracy:
    - ☐ Small number of competitors
    - ☐ Homogeneous products
    - ☐ High barriers to entry
    - ☐ Transparent pricing
    - ☐ Frequent interaction among competitors (trade associations, conferences)
    - ☐ Inelastic demand
    - ☐ Other: [________________________________]


6. THE ANTICOMPETITIVE CONSPIRACY

  1. Beginning at least as early as [__/__/____], Defendants entered into a conspiracy to [________________________________] (describe the nature of the conspiracy: price-fixing, bid-rigging, market allocation, group boycott, output restriction).

  2. The conspiracy was effectuated through:
    - ☐ Direct communications among Defendants' executives
    - ☐ Meetings at industry trade association events: [________________________________]
    - ☐ Phone calls, emails, and electronic messages
    - ☐ Coordinated pricing announcements
    - ☐ Information exchanges through third-party intermediaries
    - ☐ Other: [________________________________]

  3. Evidence of the conspiracy includes:
    - ☐ Parallel pricing movements with no competitive explanation
    - ☐ Price increases announced in lockstep, with matching effective dates
    - ☐ Actions against individual economic self-interest
    - ☐ Unprecedented price stability in a competitive market
    - ☐ Government investigation or prosecution: [________________________________]
    - ☐ Guilty pleas or convictions by Defendants or co-conspirators
    - ☐ Confidential witness/whistleblower information
    - ☐ Other: [________________________________]

  4. [Specific factual allegations supporting the conspiracy — detail the "who, what, when, where" of conspiratorial communications or coordinated conduct.]


7. EFFECTS OF THE CONSPIRACY

  1. As a direct result of Defendants' conspiracy, prices for [________________________________] were artificially raised above competitive levels.

  2. During the Conspiracy Period, prices increased by approximately [____]% above the competitive benchmark.

  3. Plaintiff and Class members were injured because they paid supra-competitive prices and would have paid less absent the conspiracy.

  4. The effects of the conspiracy were felt throughout the United States.


8. CLASS ACTION ALLEGATIONS

  1. Plaintiff brings this action under Fed. R. Civ. P. 23(a) and 23(b)(3) on behalf of a class defined as:

All persons and entities in the United States who purchased [________________________________] directly from any Defendant or co-conspirator during the period from [__/__/____] through [__/__/____] (the "Class").

  1. Numerosity. The Class includes thousands of purchasers and is so numerous that joinder is impracticable.

  2. Commonality. Common questions include: (a) whether Defendants conspired to fix prices; (b) the scope, nature, and duration of the conspiracy; (c) whether the conspiracy caused prices to be artificially inflated; and (d) the appropriate measure of damages.

  3. Typicality. Plaintiff's claims are typical — Plaintiff purchased the same products from Defendants at the same inflated prices.

  4. Adequacy. Plaintiff will fairly and adequately protect Class interests and has retained experienced antitrust counsel.

  5. Predominance. Common questions of law and fact predominate.

  6. Superiority. A class action is superior because individual damage amounts may be small relative to litigation costs.


9. CAUSES OF ACTION

COUNT I: Violation of Section 1 of the Sherman Act (15 U.S.C. § 1)

(On behalf of the Class)

  1. Plaintiff incorporates all preceding paragraphs.

  2. Defendants entered into a contract, combination, or conspiracy in unreasonable restraint of interstate trade and commerce in violation of Section 1 of the Sherman Act, 15 U.S.C. § 1.

  3. The conspiracy constitutes a per se violation of Section 1 because [________________________________] (price-fixing, bid-rigging, and market allocation agreements are per se illegal).

  4. Alternatively, even under a rule of reason analysis, the anticompetitive effects of Defendants' conduct outweigh any purported procompetitive justifications.

  5. As a direct and proximate result, Plaintiff and Class members have been injured in their business or property in an amount to be proven at trial, which shall be trebled pursuant to 15 U.S.C. § 15.

COUNT II: Violation of State Antitrust and Consumer Protection Statutes

(On behalf of applicable State Subclasses)

  1. Defendants' conduct also violated the antitrust and consumer protection statutes of the following states, many of which have repealed the Illinois Brick indirect purchaser bar: [________________________________].

  2. [Detail applicable state statutory claims.]


10. PRAYER FOR RELIEF

WHEREFORE, Plaintiff, on behalf of the Class, respectfully requests:

a. Certification of this action as a class action under Fed. R. Civ. P. 23;

b. Treble damages under 15 U.S.C. § 15 for all overcharges paid by Plaintiff and the Class;

c. Reasonable attorneys' fees, costs, and expenses of suit under 15 U.S.C. § 15;

d. Pre-judgment and post-judgment interest;

e. Injunctive and equitable relief under 15 U.S.C. § 26, including an order prohibiting Defendants from continuing the conspiracy;

f. Such other and further relief as the Court deems just and proper.


11. JURY DEMAND

Plaintiff demands a trial by jury on all triable issues.

DATED: [__/__/____]

ATTORNEY FOR PLAINTIFF:

[________________________________]
Bar No.: [________________________________]
Firm: [________________________________]
Address: [________________________________]
Phone: [________________________________]
Email: [________________________________]


SOURCES AND REFERENCES

  • Sherman Act, 15 U.S.C. §§ 1-2
  • Clayton Act, 15 U.S.C. §§ 15, 26
  • Bell Atlantic Corp. v. Twombly, 550 U.S. 544 (2007) (plausibility pleading)
  • Illinois Brick Co. v. Illinois, 431 U.S. 720 (1977) (direct purchaser rule)
  • Leegin Creative Leather Products, Inc. v. PSKS, Inc., 551 U.S. 877 (2007)
  • DOJ Antitrust Division Leniency Program
  • 15 U.S.C. § 15b (4-year statute of limitations)
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ANTITRUST CLASS ACTION COMPLAINT

GENERAL TEMPLATE


Effective Date: [DATE]
Party A: [PARTY A NAME]
Address: [PARTY A ADDRESS]
Party B: [PARTY B NAME]
Address: [PARTY B ADDRESS]
Governing Law: [GOVERNING STATE]

This document is entered into by and between [PARTY A NAME] and [PARTY B NAME], effective as of the date set forth above, subject to the terms and conditions outlined herein and the laws of [GOVERNING STATE].
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About This Template

Jurisdiction-Specific

This template is drafted for general use across all U.S. jurisdictions. State-specific versions with local statutory references are also available.

How It's Made

Drafted using current statutory databases and legal standards for class action. Each template includes proper legal citations, defined terms, and standard protective clauses.

Important Notice

This template is provided for informational purposes. It is not legal advice. We recommend having an attorney review any legal document before signing, especially for high-value or complex matters.

Last updated: April 2026