Nearly every year over the past decade, the US Supreme Court has significantly changed the private antitrust litigation landscape. Starting with the establishment of a heightened plausibility pleading standard that governs whether a complaint survives a motion to dismiss,2 subsequent decisions have clarified that:

  1. conduct must be directly linked to cognisable harm or injury to give rise to an antitrust claim;3
  2. activities inextricably intertwined with US Securities and Exchange Commission regulatory activity are immune from antitrust attack;4
  3. plaintiffs bringing antitrust actions under state law in federal court may pursue class actions or class-action remedies not otherwise available in state court;5
  4. a federal court's denial of class certification for a proposed class does not preclude a state court from later adjudicating another plaintiff's proposed class;6
  5. arbitrators may not impose class arbitration on parties unless it is contractually permissible;7
  6. express arbitration clauses trump class-action rights, even in antitrust cases;8
  7. expert testimony does not overcome lack of commonality in class actions;9
  8. class certification requires that plaintiffs establish that damage can be proven with class-wide evidence to satisfy Federal Rule of Civil Procedure (FRCP) 23(b)(3)'s predominance requirement;10
  9. individual corporate entities that are part of a joint venture may be subject to antitrust rule-of-reason scrutiny;11
  10. an order disposing of one discrete case consolidated in a multi-district litigation under 28 USC Section 1407 is an appealable final decision under 28 USC Section 1291;12
  11. stare decisis may have less than 'usual force in cases involving the Sherman Act';13
  12. courts must include both sides of a two-sided credit-card market (merchants and cardholders) in defining a relevant market and evaluating anticompetitive effects;14 and
  13. US federal courts are not bound to defer to a foreign government's official interpretation of its own laws, but owe the foreign government's interpretation respectful consideration.15

The lower federal courts apply these Supreme Court cases, deciding issues related to antitrust injury, standing requirements, the statute of limitations, class actions, discovery and pleading standards.


Private plaintiffs may bring suit in federal court for violations of federal antitrust law under two provisions of the Clayton Act of 1914. Section 4 allows private plaintiffs to sue for money damages, including reasonable attorneys' fees as well as prejudgment interest on actual damages at a court's discretion if such an award is just under the circumstances.16 Section 16 allows private plaintiffs to sue for injunctive relief.17

i Statute of limitations limit the period of potential recovery

A four-year statute of limitations applies to Section 4 claims.18 The limitations period commences when the cause of action accrues, which generally occurs when the plaintiff suffers injury and damages become ascertainable.19 Section 16 claims may also be subject to a four-year statute of limitations. Some courts have held that the four-year limitation period also applies to Section 16 claims, while others have held that it does not.20 The defence of laches nevertheless bars Section 16 claims four years after accrual of the cause of action, unless the court finds equitable reasons to allow the claim.21

The statute of limitations may be tolled by government antitrust actions,22 the filing of a class action,23 fraudulent concealment,24 duress25 or equitable estoppel.26 Where a series of overt acts rather than one definitive act causes new injury to plaintiffs, the continuing violation doctrine restarts the statute of limitations period.27 Some courts allow the tacking of tolling periods.28

ii State antitrust claims

Most US states and territories have adopted antitrust statutes. They generally mirror the federal scheme, and prohibit monopolies and unreasonable agreements (like the Sherman and Clayton Acts) and unfair and deceptive trade practices (like the Federal Trade Commission (FTC) Act). The vast majority provide for private rights of action. Statute of limitations periods vary by state.

The statutes and courts' interpretations of them differ on various points, such as the availability of treble damages,29 restitution, class actions and availability of recovery for indirect purchasers.


i General jurisdictional rule

The Foreign Trade Antitrust Improvements Act of 1982 (FTAIA) limits the extraterritorial reach of the Sherman Act to foreign anticompetitive conduct that either involves US import commerce or has a direct, substantial, and reasonably foreseeable effect on US import or domestic commerce.30 Courts have construed this to require a reasonably proximate causal nexus between the conduct and the effect on US commerce or import commerce, a standard similar to a proximate causation standard.31 Additionally, a plaintiff's injury must occur in the US rather than a foreign market to give rise to a claim under the Sherman Act.32 Although the US effects requirement is sometimes characterised as a jurisdictional issue, it has been treated as a substantive element of the Sherman Act.33

When a plaintiff alleges other antitrust claims, such as under the Clayton Act, the extraterritoriality test applies,34 subject to territorial limitations found in the substantive provision asserted. For example, Section 3 of the Clayton Act only reaches transactions in which the products are sold for use, consumption or resale in the US.35 Additionally, the FTAIA extends the Sherman Act's extraterritoriality test to apply to the FTC Act.36

A circuit split has arisen as to whether the FTAIA bars Sherman Act claims arising out of foreign conduct of a cartel. While the Seventh Circuit has interpreted the FTAIA as barring Sherman Act claims,37 the Ninth Circuit has held that the conduct of the same cartel was within the reach of the Sherman Act.38 The US Supreme Court recently denied a petition for certiorari to resolve this issue, so lower courts will continue to develop the law to clarify how these decisions apply.

ii Comity considerations

A court may employ comity considerations to decline jurisdiction, even when the FTAIA's requirements have been satisfied.39 Comity considerations generally come into play when domestic and foreign law are in conflict, such as where one law requires a defendant to engage in acts prohibited by other laws.40

iii Exemptions

Foreign sovereigns are presumptively immune from US courts' jurisdiction under the Foreign Sovereign Immunities Act (FSIA).41 To rebut the presumption, a plaintiff must show that one of the FSIA's seven exceptions applies.42 The most common exemption in antitrust cases is the commercial activity exception, which precludes FSIA immunity where a foreign sovereign state's commercial activity has a nexus with the US.43 The scope of commercial activity, foreign state and the specific nexus required to meet this exception has been extensively litigated.44

The act-of-state doctrine requires US courts to recognise the validity of public acts performed by authorised agents of foreign sovereign states within their jurisdictions.45 Thus, where a plaintiff's claim depends on the invalidity of a foreign sovereign state's domestic act, the act-of-state doctrine may absolve the defendant of liability. Various exceptions apply, such as where an extant treaty provides applicable legal standards, where the act involves a commercial function or where US foreign policy interests would not be advanced by application of the doctrine.

A private party whose conduct was compelled (and not merely sanctioned or assisted) by a foreign sovereign state will generally be immune from antitrust liability under the assumption that the defendant's activity was effectively foreign sovereign state activity.46 US federal courts must give respectful consideration to a foreign government's official statement on the correct interpretation of its own laws, but are not bound to defer to the foreign government's interpretation.47


i Standing under Section 4 of the Clayton Act

To maintain a lawsuit under Section 4 of the Clayton Act, an antitrust plaintiff must allege:

  1. that the plaintiff is a person under Section 1 of the Clayton Act;48
  2. that the defendant violated the antitrust laws;49
  3. antitrust injury (impact or fact of damage),50 that is, harm to competition51 to a plaintiff's business or property proven by direct or circumstantial evidence or inference52 with a reasonable degree of certainty;53 and
  4. that the antitrust violation was a material and substantial cause of the injury.54

Finally, the plaintiff must satisfy the remoteness doctrine, which requires that a plaintiff's injury is not too remote from the defendant's conduct, by addressing five factors:55

  1. causal connection between the violation and the harm to the plaintiff, and whether defendants intended to cause the harm;
  2. the nature of the injury, including whether the plaintiff is a consumer or competitor;
  3. directness of the injury, and how speculative or tenuous the damages are;
  4. potential for duplication of recovery or complex apportionment of damages; and
  5. whether more direct victims exist.

The doctrine generally limits the plaintiff class to consumers and competitors, and denies standing to creditors, employees, officers, shareholders and suppliers of antitrust victims. The remoteness doctrine may bar an indirect purchaser56 from bringing a Section 4 claim unless it is a competitor.57 Some courts require that the plaintiff is an efficient enforcer or a potential competitor sufficiently prepared to enter the market.58

ii Standing under Section 16 of the Clayton Act

A plaintiff who has standing to bring an antitrust action under Section 4 will also have standing under the more lenient requirements of Section 16, which are as follows:59

  1. the plaintiff is a person, firm, corporation or association;60
  2. the defendant violated the antitrust laws;61
  3. the threatened loss or damage proximately results from the alleged antitrust violation;62 and
  4. the antitrust injury, that is threatened loss or injury, is due to harm to competition.63

However, there are differences. Section 16 requires threatened loss or damage64 that is a significant threat of injury from an impending violation of the antitrust laws or from a contemporary violation likely to continue or recur65 rather than actual loss.66 Unlike Section 4 claims, the threatened loss or injury in a Section 16 claim is not limited to injury to business or property.67 Finally, courts do not impose the remoteness doctrine on Section 16 claims, so indirect purchasers may sue for injunctive relief, even though they may not sue for monetary damages.68

iii Indirect purchaser standing

Generally, indirect purchasers who purchase from a defendant but indirectly through a downstream distributor cannot recover under federal antitrust laws unless69 the direct purchaser had a pre-existing cost-plus contract with an overcharge, shifting the entire overcharge to the indirect purchaser;70 there is an ownership-control exception, where the direct purchaser is owned or controlled by the defendant or the indirect purchaser;71 or the direct purchaser was a co-conspirator.72

Indirect purchasers may recover under the Illinois Brick repealer statutes of 26 states as well as state consumer protection statutes.73


The scope of discovery in antitrust cases is broad. FRCP 26 allows discovery of a reasonable time period, geographical scope, and subject matter if the requested information is relevant to any claim or defence, proportional to the needs of the case, and the burden of the proposed discovery on the responding party does not outweigh its benefit. What is relevant for discovery is broader than what is admissible as evidence at trial.

Courts may restrict unduly burdensome discovery requests where the burden and expense outweigh the prospective benefit of the requests.74 FRCP 26(c) allows courts to restrict discovery of confidential business information or trade secrets and privileged attorney–client communications or attorney work product. Grand jury materials are only discoverable if the party has strongly demonstrated a particularised need for the materials.75

In deciding whether to allow discovery from non-party market participants, courts consider the relevance of and need for the information, whether the information is protected as a trade secret or confidential commercial information, and whether the request will cause the non-party undue hardship.76 A party that refuses to comply with a court order may face sanctions.77

Courts generally grant requests to compel discovery from domestic or foreign affiliates or subsidiaries of corporations that are parties to the antitrust case.78 Generally, a foreign party subject to personal jurisdiction in the US is subject to discovery.79 Foreign blocking statutes do not allow a corporation present in the US to resist producing documents located abroad.80


Plaintiffs may use expert testimony to establish various elements of a private antitrust claim. Expert testimony is often key in certifying a class,81 and on substantive antitrust issues like market or monopoly power, anticompetitive harm, antitrust injury and damage.

Expert testimony is only admissible if 82 the expert has sufficient specialised knowledge and expertise with respect to the field in question; the methodology and data used to reach the expert's conclusions are sufficiently reliable; and the expert's testimony is sufficiently relevant to assist the trier of fact.

Reliability is the most common basis on which expert testimony is excluded. Several factors are considered to determine whether the proffered testimony is reliable, such as whether the expert's methodology has been tested, is subject to peer review or is widely accepted by the relevant scientific community.83


i Requirements

FRCP 23 governs class actions, where one representative sues on behalf of all other similarly situated plaintiffs. To proceed, a class must be certified under FRCP 23(a) and 23(b).

Rule 23(a) requires that the plaintiff establish that:84

  1. the class is so numerous that joinder of all members would be impracticable;
  2. common questions of law and fact apply to the class;
  3. the claims or defences of the representative parties are typical of the claims or defences of the class; and
  4. the representative parties will fairly and adequately protect the interests of the class.

Additionally, Rule 23(b) requires that the plaintiff establish one of the following:85

  1. separate actions would create a risk of 'inconsistent or varying adjudications with respect to individual class members that would establish incompatible standards of conduct for the party opposing the class';
  2. separate actions would create a risk of adjudications that 'would be dispositive of the interests of the other members not parties to the individual adjudications or would substantially impair or impede their ability to protect their interests';
  3. 'the party opposing the class has acted or refused to act on grounds that apply generally to the class, so that final injunctive relief or corresponding declaratory relief is appropriate respecting the class as a whole'; or
  4. 'questions of law or fact common to class members predominate over any questions affecting only individual members', and 'a class action is superior to other available methods for fairly and efficiently adjudicating the controversy'.

Most antitrust class action suits are certified under the fourth provision. Only common questions under 23(b)(2) are relevant to the 23(b)(3) predominance analysis.86

Plaintiffs must establish that damage can be proven with class-wide evidence, that is, the case is susceptible to resolution by common proof, to satisfy 23(b)(3)'s requirement that common issues predominate.87 In some cases, plaintiffs may have recourse to representative samples to establish class-wide liability.88 Plaintiffs also must prove class-wide impact – that all class members suffered injury to their business or their property – using common proof.89 Courts have recently required more rigorous qualitative and quantitative assessments of plaintiffs' proposed common methodology for analysing class-wide impact and merits-related issues related to class certification. While the depth and breadth of expert testimony and the scope of pre-certification discovery necessary is decided on a case-by-case basis,90 a rigorous analysis of expert opinions is required.91

Plaintiffs' ability to meet, rather than an intention to meet, the FRCP 23 requirements must be demonstrated by a preponderance of the evidence at the class certification stage. A plaintiff may meet FRCP 23 requirements even if the putative class includes a de minimis number of potentially uninjured parties.92 Thus, courts generally resolve all factual and legal disputes, including expert disputes, relevant to their certification decision at the time of class certification.

Class representatives may have to establish other threshold requirements, including that the class is in existence, ascertainable and definable with reasonable specificity,93 and that at least one class plaintiff is able to demonstrate standing.94

ii Appointment of class counsel

After certification, the court must appoint class counsel to adequately and fairly represent the interests of the entire class.95

iii Limitations on class-action settlements

Pre-certification settlements

Rule 23 also allows a settlement class to be certified prior to a ruling on class certification for trial purposes. To certify a settlement class, plaintiffs must satisfy the requirements of 23(a) and meet one requirement of 23(b). However, a district court need not inquire whether the case, if tried, would present intractable management problems, allowing settlement classes to be certified where potential conflicts would defeat class certification for trial.96

Court approval of class settlements required

To prevent abuse by class representatives, Rule 23(e) requires court approval of class action settlements and voluntary dismissals. Proposed class-action settlements, voluntary dismissals or compromise proposals are generally approved if the class meets the 23(a) and 23(b) requirements, and the settlement is fair, reasonable and adequate.97 Under the latter inquiry, relief under the settlement will be evaluated against the class's expected relief at trial and its likelihood of success.98 The settlement may be rejected if the court has concerns that the damages are inadequate or concerns regarding the class standing of the plaintiffs.99


Upon certification, 23(b)(3) requires notice to be provided100 in a reasonable manner to all class members who would be bound by the proposal.101 Typically, plaintiffs bear the cost of notice.


i Types of damages cognisable

A fact finder may assess damages where the plaintiff can provide probable and inferential proof of a just and reasonable estimate of damages.102 Damages cannot be proven through speculation or guesswork.103 The court will award the plaintiff triple the amount of damages claimed (treble damages). Courts do not allow punitive damage awards, because antitrust plaintiffs already receive treble damages.104

ii Calculation of damages

The appropriate measure of damages depends on the type of antitrust violation alleged. Common approaches to damages are as follows:

  1. The difference between the plaintiff's purchase price and the price the purchaser would have paid if not for the violation is a common approach where the alleged effect of the violation is an overcharge, such as cartel claims (e.g., price fixing, bid rigging, market allocations or output limitation agreements) or monopolisation.105
  2. The difference between the plaintiff's purchase price and the price the purchaser would have paid on the open competitive market is a common measure of damages in tying cases.106 A plaintiff may be entitled to recovery only when the fair market value of the tying and tied products exceeds their combined purchase price.107
  3. The plaintiff's lost profits are a common measure of damages in cases where the plaintiff is a competitor excluded from the market or is a disfavoured purchaser in a price discrimination case.108 Damages are usually limited to lost net profits, although some courts may award lost gross profits if lost net profits are negligible.109 When the plaintiff's business has been almost or completely destroyed, courts may measure damages by lost goodwill or going concern value (i.e., the current value of lost future profits).110

iii Mitigation

A plaintiff must mitigate damage and cannot recover losses that could have been avoided.111

iv Disaggregation

A plaintiff may only collect damages for losses caused by a defendant's antitrust violation. Therefore, the plaintiff must provide the fact finder a basis to disaggregate the losses caused by other factors.112 If it does not, a damages award may be overturned on the grounds it is based on speculation and guesswork.113

v Other costs

Section 4 also awards successful plaintiffs' court costs, reasonable attorneys' fees, prejudgment interest on actual damages (awarded at the court's discretion if the court finds it just in the circumstances) and mandatory post-judgment interest.114


Antitrust defendants are barred from asserting pass-on defences against direct purchasers. Therefore, defendants may not introduce evidence that indirect purchasers, rather than the direct purchasers,115 were in fact harmed by the defendants' antitrust violations. This bar against pass-on defences is analogous to the earlier-noted bar against claims by indirect purchasers, preventing the defensive and offensive use of the pass-on theory to prevent duplicate recovery against defendants.116

Lower courts, however, have recognised three narrow exceptions to this general ban against pass-on defences and indirect purchaser claims:

  1. for pre-existing, fixed-quantity, cost-plus contracts, because the plaintiff may show that the indirect purchaser, not the direct purchaser, was harmed by any anticompetitive overcharge;117
  2. where the direct purchaser (i.e., the intermediary) is owned or controlled by either the defendant or the indirect purchaser such that the relationship involved 'such functional economic or other unity between the direct purchaser and either the defendant or the indirect purchaser that there effectively has been only one sale';118 and
  3. where the intermediary is a direct participant in a conspiracy with the defendant, such that the intermediary and defendant are then viewed as a single entity from which the plaintiff is a direct purchaser.119


i Prima facie evidence

A government judgment or decree may be prima facie evidence in a private antitrust suit if the government judgment or decree is:

  1. final;
  2. rendered in a civil or criminal proceeding brought by or on behalf of the United States;
  3. under the antitrust laws to the effect that a defendant has violated said laws; and
  4. is not a consent judgment or decree entered before any testimony has been taken.120

Additionally, the private plaintiff must be injured in fact by the antitrust violation proven in the government action.121 Guilty pleas to a DOJ indictment generally are admissible as evidence in subsequent private litigation.122 Since DOJ and FTC consent decrees are typically for settlement purposes, they do not constitute an admission by the defendant that the law has been violated.123

The prima facie effect is given to all matters distinctly put in issue and directly determined and necessarily decided against the defendant in the government proceeding,124 but is limited to the period, products and geographical scope adjudicated in the prior government action.125

ii Collateral estoppel

The collateral estoppel doctrine applies in private antitrust suits.126 Generally, the doctrine bars the retrying of issues that have already been determined by a court, and gives them conclusive effect in subsequent suits that involve a party to the prior litigation.127 A defendant can use collateral estoppel doctrine defensively to prevent a plaintiff from re-litigating issues previously decided and lost by the government,128 while a plaintiff can use collateral estoppel offensively to bar a defendant from re-litigating issues lost in prior government actions. Collateral estoppel applies to prior DOJ actions, but not to findings made by the FTC.129

Section 213(a) of the Antitrust Criminal Penalty Enhancement and Reform Act of 2004 (ACPERA)130 offers criminal defendants who participate in the DOJ's corporate leniency programme the opportunity to limit civil liability to single rather than treble damages if they provide satisfactory cooperation to civil claimants. To qualify, defendants must provide a full account of relevant facts, furnish all relevant documents, and participate in interviews and depositions reasonably requested by the plaintiff. ACERPA does not affect the plaintiff's right to recover costs, attorneys' fees and prejudgment interest provided under the Clayton Act.


i Attorney–client privilege

Attorney–client privilege protects confidential communications between an attorney and client made for the purpose of rendering or receiving legal advice, and applies in the antitrust context to the same extent as in other contexts. The privilege extends to confidential communications between corporate employees and the corporation's lawyer when those communications are necessary to facilitate the provision of legal advice to the corporation,131 and covers communications with current and former employees,132 subsidiaries and affiliates.133 It does not extend to communications with a lawyer acting in a business capacity.134

ii Waiver of attorney–client privilege

Privilege is waived if a communication is voluntarily disclosed to a third party,135 unless disclosure is necessary to provide legal advice (e.g., a secretary or an interpreter) or is part of the community-of-interest (or joint defence) privilege.136 Privilege may be waived if the corporation voluntarily discloses communications to third-party government agencies.137

iii The crime-fraud exception

Communications made between clients and their attorneys for the purpose of furthering a current or future crime or fraud, such as an antitrust law violation, are not privileged.138 To invoke the exception, the moving party must make a prima facie showing that the allegation of a crime or fraud is founded in fact and was intended to further that crime or fraud.139

iv Foreign communications and documents

Attorney–client communications that occur in a foreign country or involve foreign attorneys or proceedings and attorney work for foreign proceedings are governed by common law principles.140 Principles of international comity dictate that the law of the country with the most predominant or direct and compelling interest in whether those communications should remain confidential applies, unless it would be contrary to public policy.141 The predominant jurisdiction is usually the jurisdiction in which the attorney–client relationship was formed or where the relationship was centred at the time the privileged communication was sent.142

The Hague Evidence Convention allows discovery of foreign evidence; however, Article 11 safeguards privileged and protected evidence under the law of the state of execution or state of origin.

v Attorney work product doctrine

The work product doctrine protects all documents and tangible materials prepared by or for an attorney in anticipation of litigation.143 Ordinary fact work product includes materials in which the attorney merely records or summarises information, while opinion work product includes materials that reflect the attorney's mental impressions, opinions, judgments or legal conclusions.144 While opinion work product is virtually immune from discovery,145 a discovering party may obtain fact work product if it shows substantial need for the work product and undue hardship in obtaining the information from another source.146 The crime-fraud exception applies to ordinary attorney fact work product, but courts will maintain the immunity given the more sacrosanct opinion work product if the lawyer had no knowledge of the client's crime or fraud.147


Federal policy generally favours settlement over continued litigation. FRCP 16 allows federal judges to mandate pretrial conferences among the parties to, inter alia, facilitate settlement, and allows them to impose sanctions on parties for failing to appear or for failing to participate in good faith at such conferences.148 With the exception of class action settlements, courts typically accept a party's stipulation to settle without review. However, FRCP 23 requires that proposed class-action settlements be reviewed and approved by the court only if they are fair, reasonable and adequate, as class section settlements affect the rights of all class members.149 A defendant's unaccepted offer of settlement to a class representative does not moot the plaintiff's claim.150 Due process requirements – giving notice to the absent class members and holding a hearing in which any such absent class member who wishes to may object to the proposed settlement – must be met prior to settlement approval.151


Federal policy favours arbitration, and federal antitrust claims arising out of both international and domestic transactions generally may be arbitrated.152 Arbitration clauses are construed broadly,153 and courts refuse to recognise attempts by parties to limit the statutory remedies and procedures available to arbitrators, invalidating, for example, portions of arbitration agreements where the parties attempted to waive rights to treble damages or class or consolidated actions.154 The Supreme Court will decide this year whether courts may decline to enforce arbitration agreements that delegate to an arbitrator the question of whether a dispute should be arbitrated if the argument in favour of arbitration is wholly groundless.155 In the context of class actions, however, the defendant's arbitration rights may be deemed waived if it seeks to compel arbitration only after the class is certified and extensive discovery has occurred.156 In addition, arbitrators may not impose class arbitration on parties unless it is contractually permissible.157 The Supreme Court has held that express arbitration clauses trump class-action rights, even in antitrust cases.158


i Joint and several liability

Under the doctrine of joint and several liability, each guilty defendant is liable for all the damage caused by the conduct of the entire conspiracy, not just that attributable to its own conduct.159 Antitrust co-conspirators can be held jointly and severally liable for damage predicated on sales by members of the conspiracy and damage caused by entities outside the conspiracy caused by the conspiracy.

ii No right to contribution

An antitrust defendant may not seek contribution from other participants in the anticompetitive scheme.160 Combined with joint and several liability for antitrust damages among defendants, the absence of the right to seek contribution from others has important practical consequences for defendants in their settlement strategies.

iii Indemnification

Most courts prohibit a defendant from seeking indemnification from other participants of an anticompetitive conspiracy, treating contribution and indemnification analogously.161 However, indemnification may be available to 'an innocent actor whose liability stems from some legal relationship with the truly culpable party'.162


Monetary judgments issued by US courts generally become enforceable promptly after entry, and taking an appeal from a judgment does not ordinarily stay enforcement.163 To stay enforcement pending appeal, the losing defendant (or judgment debtor) must ordinarily post a bond for the full amount of the monetary judgments.164 Enforcement of monetary judgments in US federal courts is governed by FRCP 69.165

The principal device contemplated by that rule is the writ of execution (i.e., an order authorising US marshals to seize and sell property of the judgment debtor within the territory of the district court).166 The holder of a monetary judgment (or judgment creditor) may register the judgment in other district courts, in which case the judgment is treated as though it had issued from the court in which it has been registered.167 Rule 69 authorises proceedings in aid of enforcement, including post-judgment discovery as to the judgment debtor's assets.168 The US Supreme Court recently held that such discovery may extend to assets held abroad, because the judgment creditor may be able to secure execution in the countries where the assets are held.169

US courts generally do not have authority to execute against assets outside the US.170 However, the enforcement law of the state of New York authorises orders requiring any judgment debtor or third party over which it has personal jurisdiction to bring money or personal property belonging to the judgment debtor into the state for execution.171 The constitutionality of this approach remains an open question.172


Private antitrust litigation continues to be active in the United States, both in class action litigation for consumers against companies that have engaged in anticompetitive conduct and for private companies challenging the practices of other companies as anticompetitive. Additionally, follow-on litigation to government enforcement action, particularly in cartel matters, continues to be a large part of US antitrust litigation.

US courts continuously evaluate the scope of the antitrust laws and the legal framework in which plaintiffs may bring private litigation. Likewise, the appellate courts continue to interpret Bell Atlantic v. Twombly173 and clarify what allegations are sufficient to create a reasonably grounded expectation that discovery will reveal relevant evidence of an illegal agreement to survive dismissal.174

The Supreme Court is slated to decide another antitrust case this term. Class action plaintiffs allege that Apple has monopolised the market for iPhone apps.175 The Court will decide whether the plaintiffs' claims are barred under Illinois Brick because Apple does not sell apps, but rather software distribution services for app developers (as Apple argues), or whether the plaintiffs purchase apps directly from Apple, and thus have standing as direct purchasers under Illinois Brick, as the Ninth Circuit held in 2017.176 Last term, the Court was scheduled to decide a case concerning whether a party may immediately appeal a denial of immunity under the state action doctrine, but the parties settled the case before oral arguments.177

Over the past two years, the Supreme Court has rendered several decisions concerning general litigation issues of potential relevance to antitrust disputes. In particular, in May 2017 the Court ruled that the Convention on the Service Abroad of Judicial and Extrajudicial Documents in Civil or Commercial Matters authorises service of process by mail.178 In another case, the Supreme Court further clarified the boundaries of personal jurisdiction: building upon its 2014 Daimler 179 decision, the Court explained that a state court cannot establish general jurisdiction over an out-of-state defendant that is not incorporated nor maintains its principal place of business in that state.180

Further developments in class action litigation and substantive antitrust law have come from the federal appellate courts in recent years. For example, in the context of settling patent infringement disputes between generic and brand-name drug manufacturers, there is still substantial disagreement between the circuits as to whether plaintiffs are required to prove that the pharmaceutical company who sought generic entry would have won the patent litigation had defendants not settled.181 The Third Circuit in In re Lipitor Antitrust Litigation rejected the heightened pleading standard the District Court applied in a recent reverse payments case.182 The panel explained that defendants – not plaintiffs – have the burden to justify the rather large reverse payment.183 In DeHoog v. Anheuser-Busch InBev SA/NV, the Ninth Circuit ruled that private plaintiffs could not challenge a merger as anticompetitive where the government had required the target to divest its business interest in the US beer market, reducing the likelihood of anticompetitive effects.184

The development of the law on the procedures for bringing antitrust actions, including the seeming relaxation of some of the stringent pleading and class certification standards, as well as the continued enforcement by the federal antitrust agencies and state authorities against cartel activities and monopolisation across industries, virtually assures that private litigation will remain a robust and complex area of activity in the United States.


1 Chul Pak is a partner and Daniel P Weick is an associate at Wilson Sonsini Goodrich & Rosati. The authors would like to thank Ken Edelson for his invaluable research and drafting assistance.

2 Bell Atlantic v. Twombly, 550 U.S. 544 (2007); Ashcroft v. Iqbal, 556 U.S. 662 (2009); see also Wood v. Moss, 134 S. Ct. 2056 (2014).

3 Pacific Bell Telephone Co v. Linkline Communications, Inc, 555 U.S. 438 (2009); WeyerHaeuser Co v. Ross-Simmons Hardwood Lumber Co, 549 U.S. 312 (2007); Leegin Creative Leather Products, Inc v. PSKS, Inc, 551 U.S. 877 (2007).

4 Credit Suisse Securities (USA) LLC v. Billing, 551 U.S. 264 (2007).

5 Shady Grove Orthopedic Associates, PA v. Allstate Insurance Co, 559 U.S. 393 (2010).

6 Smith v. Bayer, 564 U.S. 299 (2011).

7 Stolt-Nielsen v. Animal Feeds, 559 U.S. 662 (2010).

8 AT&T Mobility v. Concepcion, 563 U.S. 333 (2011); American Express Co v. Italian Colors Restaurant, 570 U.S. 228 (2013).

9 Wal-Mart Stores, Inc v. Dukes, 564 U.S. 338 (2011).

10 Comcast Corporation v. Behrend, 569 U.S. 27 (2013).

11 American Needle, Inc v. National Football League, 560 U.S. 183 (2010).

12 Gelboim v. Bank of America, 135 S. Ct. 897 (2015).

13 Kimble v. Marvel Entertainment, 135 S. Ct. 2401 (2015).

14 Ohio v. American Express Co, 138 S. Ct. 2274 (2018).

15 Animal Sci. Prods. v. Hebei Welcome Pharm. Co, 138 S. Ct. 1865 (2018).

16 15 U.S.C. Section 15(a).

17 Id. Section 26.

18 Id. Section 15(b).

19 E.g., Zenith Radio Corp v. Hazeltine Research, 401 U.S. 321, 338–39 (1971).

20 E.g., Weinberger v. Retail Credit Co, 498 F.2d 552, 556 (4th Cir. 1974).

21 E.g., ITT v. GTE, 518 F.2d 913, 929 (9th Cir. 1975), overruled on other grounds by California v. American Stores Co, 495 U.S. 271 (1990).

22 15 U.S.C. Section 16(i).

23 Crown, Cork & Seal Co v. Parker, 462 U.S. 345 (1983).

24 E.g., In re Scrap Metal Antitrust Litigation, 527 F.3d 517, 536–38 (6th Cir. 2008); In re Linerboard Antitrust Litigation, 305 F.3d 145, 160 (3d Cir. 2002).

25 E.g., Willmar Poultry Co v. Morton-Norwich Products, 1974-2 Trade Cas (CCH) Paragraph 75, 292, at 97, 896 (D. Minn. 1 October 1974), aff'd 520 F.2d 289 (8th Cir. 1975); PhilCo Corp v. RCA, 186 F. Supp. 155, 161–62 (E.D. Pa. 1960).

26 E.g., American Pipe & Construction Co v. Utah, 414 U.S. 538, 559 (1974).

27 Zenith Radio Corp v. Hazeltine Research, Inc, 401 U.S. 321, 338 (1971).

28 E.g., City of Detroit v. Grinnell Corp, 495 F.2d 448, 460–61 (2d Cir. 1974), abrogated on other grounds by Goldberger v. Integrated Resources Inc, 209 F.3d 43 (2d Cir. 2000).

29 Compare Cal Bus & Prof Code Sections 16750, 16761, 17070, & 17082 with NYS Gen Bus Law Sections 340(5) & 349(h). A plaintiff that brings a state-law claim brought in federal court has access to the procedures available under Federal Rule of Civil Procedure Rule 23. Shady Grove Orthopedic Associates, PA v. Allstate Insurance Co, 559 U.S. 393 (2010).

30 15 U.S.C. Section 6a. Where conduct involves import trade or commerce, the FTAIA does not apply and courts instead apply the common law intended effects test, requiring that the foreign anticompetitive conduct was intended to and actually affected US trade or commerce. Hartford Fire Insurance Co v. California, 509 U.S. 764, 796 (1993); United States v. Aluminum Co of America, 148 F.2d 416, 443–44 (2d Cir. 1945). Some courts supplement the effects test with considerations of comity. See Timberlane Lumber Co v. Bank of America National Trust & Savings Association, 549 F.2d 597, 611–15 (9th Cir. 1976).

31 Lotes Co, Ltd v. Hon Hai Precision Industry Co, 753 F.3d 395, 398 (2d Cir. 2014); Motorola Mobility LLC v. AU Optronics Corp, 683 F.3d 845, 857 (7th Cir. 2014) (en banc); Minn-Chem, Inc v. Agrium, Inc, 683 F.3d 845, 857 (7th Cir. 2012) (en banc); In re Dynamic Random Access Memory (DRAM), 546 F.3d 981 (9th Cir. 2008); In re Monosodium Glutamate Antitrust Litigation, 477 F.3d 535 (8th Cir. 2007); Empagran SA v. F Hoffmann-La Roche Ltd, 417 F.3d 1267, 1271 (D.C. Cir. 2005).

32 F Hoffmann-La Roche Ltd v. Empagran SA, 542 U.S. 155 (2004); Empagran SA, 417 F.3d at 1271.

33 Minn-Chem, Inc v. Agrium Inc, 683 F.3d 845 (7th Cir. 2012); Animal Science Products, Inc v. China Minmetals Corp, 654 F.3d 462 (3d Cir. 2011), cert denied, 565 U.S. 1260 (2012); In re TFT-LCD Antitrust Litigation, 781 F. Supp. 2d 955 (N.D. Cal. 2011); contra United Phosphorus, Ltd v. Angus Chemical Co, 322 F.3d 942 (7th Cir. 2003) (en banc) (the FTAIA's limitations are jurisdictional in nature).

34 E.g., United Phosphorus Ltd v. Angus Chemical Co, No. 94 C 2078, 1994 WL 577246, at *5 (N.D. Ill. 18 October 1994); The In Porters SA v. Hanes Printables Inc, 663 F. Supp. 494, 498 n4 (M.D.N.C. 11 June 1987).

35 15 U.S.C. Section 14.

36 Id. Section 45(a)(3).

37 Motorola Mobility v. AU Optronics Corp, 775 F.3d 816 (7th Cir. 2014).

38 United States v. Hui Hsiung, 778 F.3d 738 (9th Cir. 2015).

39 H.R. Rep. No. 97-686, at 13 (1982), reprinted in 1982 U.S.C.C.A.N. 2487, 2498.

40 Hartford Fire Insurance Co v. California, 509 U.S. 764, 798–99 (1993).

41 28 U.S.C. Section 1604.

42 Id. Section 1605.

43 The commercial activity exception, Section 1605(a)(2), states that immunity does not apply when 'the action is based upon a commercial activity carried on in the United States by the foreign state; or upon an act performed in the United States in connection with a commercial activity of the foreign state elsewhere; or upon an act outside the territory of the United States in connection with a commercial activity of the foreign state elsewhere and that act causes a direct effect in the United States'.

44 E.g., Kato v. Ishihara, 360 F.3d 106, 108 (2d Cir. 2004); General Electric Capital Corp v. Grossman, 991 F.2d 1376, 1380–82 (8th Cir. 1993); Tubular Inspectors Inc v. Petroleos Mexicanos, 977 F.2d 180, 183–86 (5th Cir. 1992).

45 WS Kirkpatrick & Co v. Environmental Tectonics Corp, 493 U.S. 400, 409 (1990); see also Alfred Dunhill of London Inc v. Republic of Cuba, 425 U.S. 682, 694 (1976).

46 E.g., Mannington Mills v. Congoleum Corporation, 595 F.2d 1287, 1293 (3d Cir. 1979).

47 Animal Sci Prods v. Hebei Welcome Pharm Co, 138 S. Ct. 1865, 1869–70 (2018).

48 15 U.S.C. Section 15. Section 12(a) defines persons as 'corporations and associations existing under or authorized by laws of either the United States, the laws of any of the Territories, the laws of any State, or the laws of any foreign country'. Courts have also interpreted persons to include individual consumers (e.g., Reiter v. Sonotone Corporation, 442 U.S. 330, 340–42 (1979)), partnerships (e.g., Coast v. Hunt Oil Co, 195 F.2d 870, 871 (5th Cir. 1952)), states (e.g., Standard Oil Co v. Arizona, 738 F.2d 1021, 1023 (9th Cir. 1984)) and foreign governments (Pfizer v. Government of India, 434 U.S. 308, 318–20 (1978)). Section 4 of the Clayton Act (15 U.S.C. Section 15(b)) generally limits recovery by foreign governments to actual, instead of treble, damages. While the United States and state attorneys general are not considered persons under the Clayton Act, they are nonetheless entitled to sue on their own behalf under Sections 4A and 4C of the Clayton Act (15 U.S.C. Sections 15a, 15c).

49 E.g., 15 U.S.C. Sections 12(a) and 15.

50 Story Parchment Co v. Paterson Parchment Paper Co, 282 U.S. 555, 563 (1931).

51 E.g., Brunswick Corp v. Pueblo Bowl-O-Mat Inc, 429 U.S. 477, 488 (1977); see, e.g., Southeast Missouri Hospital v. CR Bard, Inc, 616 F.3d 888 (3d Cir. 2010); Race Tires America v. Hoosier Racing Tire Corp, 614 F.3d 57 (3d Cir. 2010); but see Palmyra Park Hospital v. Phoebe Putney Memorial Hospital, 604 F.3d 1291 (11th Cir. 2010).

52 Zenith Radio Corp v. Hazeltine Research, 395 U.S. 100, 126 (1969).

53 Duty Free Americas, Inc v. Estee Lauder Companies, 797 F.3d 1248, 1272–73 (11th Cir. 2015); Mostly Media v. US W Communications, 186 F.3d 864, 865–66 (8th Cir. 1999); OK Sand & Gravel v. Martin Marietta Technologies, 36 F.3d 565, 573 (7th Cir. 1994).

54 E.g., Tal v. Hogan, 453 F.3d 1244, 1258 (10th Cir. 2006).

55 Associated General Contractors v. California State Council of Carpenters, 459 U.S. 519, 537-44 (1983). This year, the Third Circuit Court of Appeals addressed a novel standing issue and found that purchasers of products that include inputs made more expensive by the defendants' conspiracy – but not produced by the conspirators – had standing under the Clayton Act. In re Processed Egg Prods Antitrust Litig, 881 F.3d 262 (3d Cir. 2018).

56 Campos v. Ticketmaster Corp, 140 F.3d 1166, 1169 (8th Cir. 1998).

57 Illinois Brick Co v. Illinois, 431 U.S. 720, 735 (1977).

58 Sanger Insurance Agency v. Hub International Ltd, 802 F.3d 732 (9th Cir. 2015); Sunbeam Television Corp v. Nielson Media Research, Inc, 711 F.3d 1264 (11th Cir. 2013).

59 Palmyra Park Hospital v. Phoebe Putney Memorial Hospital, 604 F.3d 1291 (11th Cir. 2010).

60 15 U.S.C. Section 26.

61 Id.

62 Zenith Radio Corp v. Hazeltine Research, 395 U.S. 100, 130 (1969).

63 Cargill Inc v. Monfort of Colorado Inc, 479 U.S. 104, 112–13 (1986); Zenith, 395 U.S. at 130.

64 1675 U.S.C. Section 26.

65 395 U.S. at 130; but see Freedom Holdings v. Cuomo, 624 F.3d 38 (2d Cir. 2010), cert denied sub nom Freedom Holdings v. Schneider, 31 S. Ct. 1810 (2011).

66 15 U.S.C. Section 15.

67 Cargill, 479 U.S. at 111.

68 E.g., In re Relafen Antitrust Litigation, 221 F.R. D. 260, 273–74 (D. Mass. 12 May 2004).

69 Illinois Brick, 431 U.S. at 735.

70 Hanover Shoe, Inc v. United Shoe Machine Corp, 392 U.S. 481, 494 (1968); Illinois Brick, 431 U.S. at 736.

71 Illinois Brick, 431 U.S. at 736 n16.

72 E.g., Insulate SB, Inc v. Advanced Finishing Systems, 797 F.3d 538, 542 (11th Cir. 2015); Paper Systems v. Nippon Paper Industries Co, 281 F.3d 629, 631 (7th Cir. 2002); Campos v. Ticketmaster Corp, 140 F.3d 1166, 1171, n4 (8th Cir. 1998); Arizona v. Shamrock Foods, 729 F.3d 1208, 1212–14 (9th Cir. 1984).

73 E.g., Ciardi v. F Hoffmann-La Roche, 436 Mass. 53 (Mass. 2002).

74 FRCP 26(b)(1); e.g., In re ATM Fee Antitrust Litigation, No. C 04-02676 CRB, 2007-1 Trade Cas (CCH) Paragraph 75, 760 (N.D. Cal. 25 June 2007).

75 E.g., United States v. Sells Engineering, 463 U.S. 418, 443 (1983).

76 E.g., ACT Inc v. Sylvan Learning Sys, No. CIV A 99-63, 1999-1 Trade Cas (CCH) Paragraph 72, 527 (E.D. Pa. 14 May 1999).

77 FRCP 37.

78 E.g., In re ATM Fee Antitrust Litigation, 233 F.R. D. 542, 544–45 (N.D. Cal. 5 December 2005).

79 E.g., Société Nationale Industrielle Aerospatiale v. US Dist Court for Southern Dist of Iowa, 482 U.S. 522 (1987); Strauss v. Credit Lyonnais, 242 F.R. D. 199 (E.D.N.Y. 25 May 2007).

80 E.g., Arthur Andersen & Co v. Finesilver, 546 F.2d 338, 342 (10th Cir. 1976).

81 See Section VII.

82 FRCP 702; Daubert v. Merrell Dow Pharmaceuticals, 509 U.S. 579, 593–94 (1993).

83 Daubert, 509 U.S. at 593–94.

84 FRCP 23(a).

85 FRCP 23(b).

86 Wal-Mart Stores, Inc v. Dukes, 564 U.S. 338 (2011).

87 Comcast Corporation v. Behrend, 569 U.S. 27 (2013).

88 Tyson Foods, Inc v. Bouaphakeo, 136 S. Ct. 1036 (2016).

89 2A, P Areeda and H Hovenkamp, Antitrust Law, 398a, at 438–39 (3d ed 2007).

90 In re Hydrogen Peroxide Antitrust Litigation, 552 F.3d 305, 310 (3d Cir. 2009).

91 Comcast, 569 U.S. at 33–38; Wal-Mart, 564 U.S. at 352–55.

92 In re Nexium Antitrust Litigation, 777 F.3d 3, 25 (1st Cir. 2015). But see In re Asacol Antitrust Litigation, 907 F. 3d 42 (1st Cir. 2018) (overturning a lower court's grant of class certification where roughly 10 per cent of the class consisted of uninjured plaintiffs, and the plaintiffs proposed that uninjured class members could be removed after class certification).

93 Some courts have held that that a class is ascertainable when defined by objective criteria that are administratively feasible for the court to identify. Brecher v. Republic of Argentina, 802 F.3d 303 (2d Cir. 2015); Marcus v. BMW of North America, 687 F.3d 583 (3d Cir. 2012).

94 E.g., Prado-Steinman v. Bush, 221 F.3d 1266, 1279 (11th Cir. 2000).

95 FRCP 23(g).

96 FRCP 23(b)(3)(d); Amchem Products, Inc v. Windsor, 521 U.S. 591, 620 (1997); e.g., Sullivan v. DB Investments, Inc, 667 F.3d 273, 301 (3d Cir. 2011).

97 FRCP 23(e)(2); Amchem, 521 U.S. at 621.

98 E.g., Wal-Mart Stores Inc v. Visa USA Inc, 396 F.3d 96, 118–19 (2d Cir. 2005).

99 E.g., In re Refrigerant Compressors Antitrust Litigation, 795 F. Supp. 2d 647 (E.D. Mich. 2011).

100 FRCP 23(c)(2).

101 FRCP 23(e)(1).

102 Zenith Radio Corp v. Hazeltine Research, 395 U.S. 100, 123 (1969).

103 Bigelow v. RKO Radio Pictures, 327 U.S. 251, 264 (1946); Dopp v. Pritzker, 38 F.3d 1239, 1249 (1st Cir. 1994).

104 McDonald v. Johnson & Johnson Co, 722 F.2d 1370, 1381 (8th Cir. 1983).

105 E.g., Howard Hess Dental Labs Inc v. Dentsply International Inc, 424 F.3d 363, 374 (3d Cir. 2005).

106 E.g., Crossland v. Canteen Corp, 711 F.2d 714, 722 (5th Cir. 1983).

107 E.g., Will v. Comprehensive Accounting Corp, 776 F.2d 665, 672–73 (7th Cir. 1985).

108 E.g., Trabert & Hoeffer, Inc v. Piaget Watch Corp, 633 F.2d 477, 484 (7th Cir. 1980).

109 Id.

110 E.g., Faulkner's Auto Body Center Inc v. Covington Pike Toyota Inc, 50 Fed Appx 664, 667–69 (6th Cir. 2002).

111 E.g., Pierce v. Ramsey Winch Co, 753 F.2d 416, 436 (5th Cir. 1985); Litton Sys Inc v. AT&T Corp, 700 F.2d 785, 820 n47 (2d Cir. 1983).

112 E.g., Blue Cross & Blue Shield United v. Marshfield Clinic, 152 F.3d 588, 592–93 (7th Cir. 1998).

113 E.g., US Football League v. NFL, 842 F.2d 1355, 1377–79 (2d Cir. 1988).

114 15 U.S.C. Section 15(a); 28 U.S.C. Section 1961 (2000).

115 Hanover Shoe Inc v. United Machinery Corp, 392 U.S. 481, 491–94 (1968).

116 See Section IV; Illinois Brick, 431 U.S. at 730–31.

117 Illinois Brick, 431 U.S. at 735–36; Mid-West Paper Prods Co v. Continental Group Inc, 596 F.2d 573, 577 (3d Cir. 1979).

118 Jewish Hospital Association of Louisville v. Stewart Mechanical Enterprises Inc, 628 F.2d 971, 974–75 (6th Cir. 1980).

119 E.g., In re Brand Name Prescription Drugs Antitrust Litigation, 123 F.3d 599, 604 (7th Cir. 1997).

120 15 U.S.C. Section 16(a); Emich Motors Corp v. General Motors Corp, 340 U.S. 558, 569 (1951).

121 E.g., Theatre Enterprises Inc v. Paramount Film Distribution Corp, 346 US 537, 543 (1954).

122 FRE 410. A guilty plea is not admissible if a plea is later withdrawn or is a nolo contendere (no contest) plea.

123 United States v. ITT Continental Baking Co, 420 U.S. 223, 236 n10 (1975).

124 15 U.S.C. Section 16(a).

125 E.g., Dart Drug Corp v. Parke, Davis & Co, 344 F.2d 173, 184 (D.C. Cir. 1965); Michigan v. Morton Salt Co, 259 F. Supp. 35, 68, 74 (D. Minn. 1966).

126 15 U.S.C. Section 16(a) ('Nothing contained in this section shall be construed to impose any limitation on the application of collateral estoppel').

127 E.g., Montana v. United States, 440 U.S. 147, 153–54 (1979).

128 In re Microsoft Corp Antitrust Litigation, 355 F.3d 322, 325–26 (4th Cir. 2004).

129 15 U.S.C. Section 16(a).

130 Antitrust Criminal Penalty Enhancement & Reform Act of 2004, Section 213, 15 U.S.C. Section 1 note.

131 Upjohn Co v. United States, 449 U.S. 383, 394–95 (1981).

132 E.g., In re Allen, 106 F.3d 582, 605–06 (4th Cir. 1997).

133 E.g., United States v. AT&T Co, 86 F.R. D. 603, 616–18 (D. DC. 18 April 1979).

134 E.g., In re Allen, 106 F.3d at 600–05.

135 E.g., In re Qwest Communications International Inc, 450 F.3d 1179, 1185 (10th Cir. 2006).

136 E.g., In re Copper Market Antitrust Litigation, 200 F.R. D. 213, 217 (S.D.N.Y. 30 April 2001).

137 In re Qwest, 450 F.3d at 1187–88.

138 E.g., Clark v. United States, 289 U.S. 1, 15 (1933); In re Antitrust Grand Jury, 805 F.2d 155, 164–68 (6th Cir. 1986).

139 E.g., Clark v. United States, 289 U.S. at 15.

140 FRE 501.

141 E.g., Wultz v. Bank of China, 979 F. Supp. 2d 479, 486 (S.D.N.Y. 2013) (quoting Golden Trade SrL v. Lee Apparel Co, 143 FR.D. 514, 522 (S.D.N.Y. 17 August 1992)).

142 Id.

143 FRCP 26(b)(2); Hickman v. Taylor, 329 U.S. 495 (1947).

144 E.g., 805 F.2d at 163.

145 E.g., 329 U.S. at 513.

146 FRCP 26(b)(3)(A).

147 E.g., 805 F.2d at 163-64.

148 FRCP 16(a)(5), (f)(1).

149 FRCP 23(e).

150 Campbell-Ewald Co v. Gomez, 136 S. Ct. 663 (2016).

151 FRCP 23(e).

152 E.g., Mitsubishi Motors Corp v. Soler Chrysler-Plymouth, Inc, 473 U.S. 614 (1985).

153 E.g., JLM Industries, Inc v. Stolt-Nielsen SA, 387 F.3d 163 (2d Cir. 2004).

154 Kristian v. Comcast Corp, 446 F.3d 25, 46–48, 55–62 (1st Cir. 2006).

155 Archer and White Sales, Inc v. Henry Schein, Inc, 878 F. 3d 488 (5th Cir. 2017), cert granted, No. 17-1272, 2018 U.S. LEXIS 3879 (U.S. 25 June 2018).

156 Healy v. Cox Communications, Inc, 790 F.3d 1112, 1118–21 (10th Cir. 2015).

157 Stolt-Nielsen SA v. AnimalFeeds Int'l Corp, 559 U.S. 662 (2010).

158 AT&T Mobility v. Concepcion, 563 U.S. 333 (2011); American Express Co v. Italian Colors Restaurant, 570 U.S. 228 (2013).

159 E.g., Texas Indus v. Radcliff Materials, Inc, 451 U.S. 630 (1981).

160 Id. at 639–46.

161 Professional Beauty Supply, Inc v. National Beauty Supply, Inc, 594 F.2d 1179, 1186–87 (8th Cir. 1979), abrogated on other grounds by Texas Industries v. Radcliff Materials, 451 US 630 (1981); Mortgages, Inc v. US District Court for District of Nevada, 934 F.2d 209, 212 n3 (9th Cir. 1991).

162 Wills Trucking, Inc v. Baltimore & Ohio RR Co, No. 97-4067, 1999 US App. LEXIS 9832, at 7–8 (6th Cir. 1999).

163 FRCP 62(a).

164 FRCP 62(d).

165 Judgments awarding injunctions are enforced by the issuing court through its power to hold a party that violates its orders in contempt. See 18 U.S.C. Section 401.

166 See Aetna Cas & Sur Co v. Markarian, 114 F 3d 346, 349 (1st Cir. 1997).

167 See 28 U.S.C. Section 1963.

168 See Fed R Civ P 69(a)(2).

169 Republic of Argentina v. NML Capital, Ltd, 134 S. Ct. 2250 (2014).

170 Id.

171 Koehler v. Bank of Bermuda, 12 N.Y.3d 533, 538-41 (2009); Gryphon Dom VI, LLC v. APP Intl Fin Co, BV, 41 AD3d 25, 31 (N.Y. App. Div. 1st Dep't 2007).

172 Koehler, 12 NY3d at 544–45 (Smith, J, dissenting) (noting potential constitutional objections).

173 550 U.S. 544 (2007).

174 Evergreen Partnering Group, Inc v. Forrest, 720 F.3d 33 (1st Cir. 2013); Starr v. Sony BMG Music Entm't, 592 F.3d 314 (2d Cir. 2010).

175 In re Apple iPhone Antitrust Litig, 846 F.3d 313 (2017), cert granted, No. 17-204, 2018 U.S. LEXIS 3800 (U.S., 18 June 2018).

176 Id. at 322–25.

177 SolarCity Corp v. Salt River Project Agric, 859 F. 3d 720 (9th Cir. 2018), cert granted, No. 17-368 2017 U.S. LEXIS 7091 (U.S., 1 December 2017), dismissed, No. 17-368, 2018 U.S. LEXIS 1916 (U.S. 22 March 2018).

178 Water Splash, Inc v. Menon, 137 S. Ct. 1504 (2017).

179 Daimler AG v. Bauman, 134 S. Ct. 746 (2014).

180 BNSF Ry v. Tyrrell, 137 S. Ct. 1549 (2017).

181 Compare In re Lidoderm Antitrust Litigation, 2017 U.S. Dist. LEXIS 182940, at *50 (N.D. Cal. 3 November 2017) (holding that plaintiffs must only show some evidence that the pharmaceutical entrant could have won at trial) with In re Wellbutrin XL Antitrust Litig, 868 F.3d 132, 167 n58 (3d Cir. 2017) (explaining that the panel cannot solve the antitrust issue without considering the underlying parent dispute).

182 In re Lipitor Antitrust Litig, 868 F.3d 231 (3d Cir. 2017).

183 Id. at 256.

184 DeHoog v. Anheuser-Busch InBev SA/NV, 899 F. 3d. 758 (9th Cir. 2018).