Compendium

Antitrust and Competition Law Deep Dive

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Antitrust and Competition Law Deep Dive

United States antitrust rests on a three-statute foundation enacted between 1890 and 1914 — the Sherman Act, the Clayton Act, and the FTC Act — interpreted and reinterpreted by federal courts across 135 years. The body of law operates on a sliding scale from per-se condemnation (price fixing, market allocation, bid rigging) through structured rule-of-reason analysis (most vertical restraints, mergers, monopolization) to per-se legality (unilateral refusals to deal in most circumstances). Enforcement is shared by the Antitrust Division of the Department of Justice (DOJ), the Federal Trade Commission (FTC), state attorneys general, and private plaintiffs (treble damages plus attorney’s fees under Clayton Act § 4, 15 USC § 15). The EU runs a parallel regime under TFEU Articles 101 and 102 with the European Commission as primary enforcer; the UK Competition and Markets Authority (CMA) operates an increasingly divergent post-Brexit framework; and a global patchwork of competition authorities (China SAMR, Japan JFTC, Korea KFTC, Brazil CADE, India CCI, Australia ACCC) review large transactions.

This note covers the doctrinal core (horizontal and vertical restraints, monopolization, mergers), the economic toolkit (market definition, HHI, critical-loss analysis, vGUPPI), and the 2017-2026 wave of platform antitrust cases (Ohio v American Express, Epic v Apple, NCAA v Alston, DOJ v Google search and ad-tech, FTC v Meta, FTC v Amazon) that have driven both doctrinal renewal and enforcement-policy contention.

See also

The Three Foundational Statutes

Sherman Act of 1890 (15 USC §§ 1-7)

Authored by Senator John Sherman (R-OH), signed by President Benjamin Harrison July 2, 1890. Drafted in the lingering wake of the rise of Standard Oil, the sugar trust, and other late-19th-century trusts, and against a populist backdrop of railroad rate discrimination.

  • Section 1 (15 USC § 1) — “Every contract, combination in the form of trust or otherwise, or conspiracy, in restraint of trade or commerce among the several States, or with foreign nations, is declared to be illegal.” Requires (a) concerted action — an agreement between two or more economic actors; and (b) unreasonable restraint of trade. Standard Oil Co of New Jersey v United States, 221 U.S. 1 (1911) read in the “rule of reason” gloss, holding that only unreasonable restraints fall within § 1.
  • Section 2 (15 USC § 2) — “Every person who shall monopolize, or attempt to monopolize, or combine or conspire with any other person or persons, to monopolize any part of the trade or commerce among the several States, or with foreign nations, shall be deemed guilty of a felony.” Reaches unilateral conduct (unlike § 1).
  • Section 3 — applies §§ 1-2 to the District of Columbia and US territories.
  • Penalties — currently 1 million individual / 10 years imprisonment per count under the Antitrust Criminal Penalty Enhancement and Reform Act 2004 (with criminal fines uncapped under 18 USC § 3571(d) if pegged to gain or loss).

Clayton Act of 1914 (15 USC §§ 12-27)

Enacted in response to early Sherman Act enforcement difficulty, particularly the perception that judicial rule-of-reason analysis under Standard Oil had weakened the statute.

  • Section 2 — Robinson-Patman Act amendment 1936 (15 USC § 13) — price discrimination between competing buyers in commodity sales. Largely dormant after the 1970s; FTC restarted enforcement 2022-24 with cases against PepsiCo and Southern Glazer’s (filed Jan and Dec 2024).
  • Section 3 (15 USC § 14) — exclusive dealing and tying in commodity sales (parallel to § 1 Sherman Act analysis under most modern decisions).
  • Section 4 (15 USC § 15) — private treble damages plus reasonable attorney’s fees. The fee-shifting plus tripling produces the engine for private antitrust litigation.
  • Section 7 (15 USC § 18) — the merger statute — prohibits acquisitions where “the effect of such acquisition may be substantially to lessen competition, or to tend to create a monopoly.” Amended by Celler-Kefauver 1950 (closing the assets loophole) and Hart-Scott-Rodino 1976 (premerger notification).
  • Section 8 (15 USC § 19) — interlocking directorates between competitors above thresholds (currently 4,855,900 capital thresholds for FY2025, indexed annually). DOJ pursued interlock cases against Pinterest, SoFi, Solar Mosaic, Crisp, Network Insight 2022-23.

Federal Trade Commission Act of 1914 (15 USC §§ 41-58)

Created the FTC and prohibited “unfair methods of competition” (UMC, § 5(a)(1), 15 USC § 45(a)(1)) plus “unfair or deceptive acts or practices” (UDAP, § 5(a)(1) consumer-protection prong).

  • FTC § 5 is broader than the Sherman Act on its face — FTC v Sperry & Hutchinson, 405 U.S. 233 (1972) recognized standalone § 5 authority. Modern FTC has reasserted standalone § 5 UMC authority via the November 2022 Statement of Enforcement Policy (Khan/Slaughter/Bedoya).
  • The FTC cannot bring criminal cases; the DOJ Antitrust Division does.
  • AMG Capital Management v FTC, 593 U.S. 67 (2021) held that § 13(b) does not authorize FTC equitable monetary relief, eliminating a key remedies tool and pushing the FTC toward Magnuson-Moss rulemaking and § 19 administrative remedies.

Per Se vs Rule of Reason vs Quick Look

The choice of analytical framework drives every § 1 case.

Per se rules

A restraint is “manifestly anticompetitive” and condemned without inquiry into its actual effects or business justifications. The per se categories:

  • Horizontal price fixing — United States v Socony-Vacuum Oil, 310 U.S. 150 (1940); Catalano v Target Sales, 446 U.S. 643 (1980) (including agreements on terms of credit).
  • Horizontal market allocation — Palmer v BRG of Georgia, 498 U.S. 46 (1990) (bar review market split).
  • Bid rigging — United States v Brown, 936 F.2d 1042 (9th Cir 1991); persistent DOJ criminal docket on construction, road paving, generic drug, packaged seafood (StarKist/Bumble Bee/Chicken of the Sea 2017-19), broiler chicken (Pilgrim’s Pride / Tyson / Koch / Mar-Jac 2020-21) cartels.
  • Group boycotts in some settings — Klor’s v Broadway-Hale, 359 U.S. 207 (1959); but Northwest Wholesale Stationers v Pacific Stationery, 472 U.S. 284 (1985) restricted per se status for joint-venture expulsions.

Criminal prosecution under Sherman § 1 is reserved for per se categories — hardcore cartels (price fixing, bid rigging, market/customer allocation).

Quick look (truncated rule of reason)

For restraints that are “facially anticompetitive” but not in a recognized per se category, the burden shifts: the defendant must offer a procompetitive justification. California Dental Association v FTC, 526 U.S. 756 (1999); NCAA v Board of Regents, 468 U.S. 85 (1984).

Rule of reason

The default. A three-step burden shift articulated in Ohio v American Express, 585 U.S. 529 (2018):

  1. Plaintiff must show the restraint causes substantial anticompetitive effect in a relevant market.
  2. Defendant must offer a procompetitive justification.
  3. Plaintiff must show the justification could be achieved by less restrictive means or that the harm outweighs the benefit.

Market Definition

Every rule-of-reason and § 2 case turns on market definition. Two relevant markets must be defined: the product (or service) market and the geographic market.

Brown Shoe and the practical-indicia approach

Brown Shoe Co v United States, 370 U.S. 294 (1962) — listed factors: industry or public recognition of the submarket as a separate economic entity, the product’s peculiar characteristics and uses, unique production facilities, distinct customers, distinct prices, sensitivity to price changes, and specialized vendors. “Practical indicia” still cited in modern courts despite economic critiques.

The cellophane fallacy

United States v du Pont (Cellophane), 351 U.S. 377 (1956) — the Supreme Court accepted du Pont’s argument that cellophane competed with all flexible packaging materials and so du Pont lacked monopoly power. The error: at the prevailing (monopoly) price, substitutes appeared close; at a competitive baseline, cellophane was its own market. The “cellophane fallacy” is the canonical caution against using prevailing-price cross-elasticity to define a market for a suspected monopolist.

Hypothetical monopolist test (HMT / SSNIP)

Introduced in the 1982 DOJ Merger Guidelines and refined in subsequent revisions (most recently the 2023 Merger Guidelines).

The HMT asks: would a hypothetical monopolist over a candidate set of products profitably impose a Small but Significant Non-transitory Increase in Price (SSNIP, typically 5%)? If yes, the set is a market. If not, expand by adding the next best substitute and re-test. The HMT operationalizes Brown Shoe’s search for the smallest collection of products and locations within which power could be exercised.

Critical loss analysis — given a candidate market and known margins, what fraction of unit sales must be lost for the SSNIP to be unprofitable, and does observed diversion meet that threshold? Polypore International v FTC, 686 F.3d 1208 (11th Cir 2012); FTC v H.J. Heinz, 246 F.3d 708 (D.C. Cir 2001).

Two-sided platforms

Ohio v American Express (2018) — Justice Thomas’s majority held that two-sided transaction platforms (credit card networks, ride-hailing, dating apps) must be analyzed as a single market, requiring plaintiffs to show net harm across both sides. The dissent (Breyer) argued the majority confused the rule of reason’s burden-shift sequence with market definition. Heavily contested in academic commentary; Apple v Pepper, 587 U.S. 273 (2019) on Illinois Brick stood up to AmEx in part.

Monopolization — Sherman Act § 2

The two-element framework from United States v Grinnell, 384 U.S. 563 (1966):

  1. Possession of monopoly power in the relevant market.
  2. “The willful acquisition or maintenance of that power as distinguished from growth or development as a consequence of a superior product, business acumen, or historic accident.”

Monopoly power

Generally proven by direct evidence (ability to control prices or exclude competition) or by market share + barriers to entry. Shares above ~70% generally suffice; 50-70% may suffice depending on entry conditions; below 50% rarely. United States v Aluminum Co of America (Alcoa), 148 F.2d 416 (2d Cir 1945) (Judge Learned Hand) — 90% “is enough to constitute a monopoly; it is doubtful whether sixty or sixty-four percent would be enough; and certainly thirty-three per cent is not.”

Conduct — “anticompetitive” vs “competition on the merits”

The hard question. The Supreme Court’s most sustained recent engagement:

  • Aspen Skiing v Aspen Highlands, 472 U.S. 585 (1985) — refusal to deal with a smaller rival in a joint lift-ticket arrangement was § 2 conduct; the monopolist sacrificed short-term profit, supporting an inference of anticompetitive intent. The high-water mark of the duty to deal.
  • Verizon Communications v Trinko, 540 U.S. 398 (2004) — significantly narrowed Aspen Skiing to its facts. Per Justice Scalia: “Aspen Skiing is at or near the outer boundary of § 2 liability.” The default rule: no general duty to deal with rivals; antitrust does not require sharing.
  • Pacific Bell v linkLine, 555 U.S. 438 (2009) — no price-squeeze claim where there is no duty to deal.

United States v Microsoft, 253 F.3d 34 (D.C. Cir 2001) (en banc per curiam)

The leading modern monopolization case. The D.C. Circuit en banc:

  • Affirmed monopoly power in the market for Intel-compatible PC operating systems (95%+ share, applications-barrier-to-entry).
  • Affirmed liability under § 2 for: contractual restrictions on OEMs (preventing removal of Internet Explorer icon); commingling IE and Windows code (preventing OEMs from offering a Windows configuration without IE); restrictions on Apple, Intel, and ISVs.
  • Reversed the per se tying claim and remanded for rule-of-reason analysis (platform software cases require nuanced analysis).
  • Reversed the conduct-based remedy (breakup) and remanded.
  • Adopted a structured rule-of-reason for § 2 conduct: plaintiff prima facie shows anticompetitive effect; defendant offers procompetitive justification; plaintiff rebuts as pretext or shows harm outweighs benefit.

Final consent decree in 2002, modified 2006, expired 2011. The D.C. Circuit’s Microsoft framework remains the template for modern unilateral-conduct cases.

DOJ v Google search (D.D.C., Mehta J)

Filed October 2020. Trial September-November 2023. Judge Amit Mehta’s August 5, 2024 liability ruling found Google liable under § 2 for monopolization of the markets for general search services and general search text advertising. Default-distribution agreements with Apple ($20 billion/year Safari), Android OEMs, and browser makers (Mozilla) were the anticompetitive conduct. Remedies trial concluded August 2025; Judge Mehta ordered Google to share certain search-index data, ended default-payments structurally, and declined a Chrome divestiture. Google appealed to the D.C. Circuit November 2025.

DOJ v Google ad tech (E.D. Va., Brinkema J)

Filed January 2023, after the DOJ had broken out a separate complaint from a multi-state coalition. Tried September-November 2024. Judge Leonie Brinkema’s April 17, 2025 ruling found Google liable for monopolization of publisher ad servers and ad exchanges and tied them together; declined to find monopolization of the advertiser ad network market. Remedies phase ongoing 2025-26 with potential structural divestiture of the Google Ad Manager stack.

Tying and Bundling

Tying — conditioning the sale of a tying product on purchase of a tied product.

The classical per se test (Northern Pacific Ry v United States, 356 U.S. 1 (1958); Jefferson Parish Hospital District No 2 v Hyde, 466 U.S. 2 (1984)): (i) two separate products; (ii) sufficient market power in the tying product; (iii) substantial commerce affected.

Microsoft (D.C. Cir 2001, en banc) modified — for platform-software cases, rule-of-reason applies because per se rules misjudge integration efficiencies.

Illinois Tool Works v Independent Ink, 547 U.S. 28 (2006) — eliminated the presumption that a patent confers market power, requiring proof of power on the merits.

Bundling — discounts conditioned on buying multiple products. LePage’s v 3M, 324 F.3d 141 (3d Cir 2003) (en banc) — bundled rebates can be anticompetitive under § 2. Cascade Health Solutions v PeaceHealth, 515 F.3d 883 (9th Cir 2008) — adopted a “discount attribution” test: if subtracting the entire bundled discount from the competitive product would price below cost, the bundle is anticompetitive.

Vertical Restraints

Agreements up and down the distribution chain.

Resale price maintenance (RPM)

  • Dr Miles Medical Co v John D Park & Sons, 220 U.S. 373 (1911) — held minimum RPM per se illegal. The rule prevailed for nearly a century.
  • Leegin Creative Leather Products v PSKS, 551 U.S. 877 (2007) — overruled Dr Miles; minimum RPM analyzed under rule of reason. 5-4 majority (Kennedy). The dissent (Breyer) emphasized stare decisis and Congressional reliance on Dr Miles.
  • State variation — Maryland, California, Kansas have rejected Leegin as a matter of state antitrust law and retained per se treatment.

Maximum RPM and vertical non-price

  • Albrecht v Herald Co, 390 U.S. 145 (1968) — overruled by State Oil v Khan, 522 U.S. 3 (1997) — maximum RPM rule of reason.
  • Continental TV v GTE Sylvania, 433 U.S. 36 (1977) — vertical territorial / customer restraints (non-price) rule of reason. Overruled United States v Arnold Schwinn, 388 U.S. 365 (1967).

Exclusive dealing

Rule of reason. Tampa Electric v Nashville Coal, 365 U.S. 320 (1961) — “foreclosure” of substantial share of the relevant market is the key inquiry. ZF Meritor v Eaton, 696 F.3d 254 (3d Cir 2012); McWane v FTC, 783 F.3d 814 (11th Cir 2015) — affirmed FTC § 5 exclusive-dealing case in domestic iron pipe fittings.

Mergers — Clayton Act § 7

Hart-Scott-Rodino premerger notification

Adopted 1976 (15 USC § 18a). Transactions above thresholds must file with FTC + DOJ and observe a 30-day waiting period (15 days for cash tender offers). Thresholds indexed annually — for 2025: size-of-transaction 25.3 million / $252.9 million.

The agencies issue a Second Request when concerns warrant detailed investigation; merger cannot close until substantial compliance plus a 30-day post-compliance period (10 for cash tender). HSR amendments effective February 2024 substantially expanded the information required at first filing — labor markets, prior acquisitions in the last 10 years, supply relationships.

Horizontal Merger Guidelines — 2023 revision

The DOJ/FTC issued joint Merger Guidelines in December 2023, the first comprehensive rewrite since 2010. Combining horizontal and vertical guidance into 13 substantive guidelines. Key thresholds:

  • HHI (Herfindahl-Hirschman Index) — sum of squared market shares (in percentage points).
    • Unconcentrated: HHI < 1,000 (down from 2010’s < 1,500).
    • Moderately concentrated: 1,000-1,800 (down from 1,500-2,500).
    • Highly concentrated: > 1,800 (down from > 2,500).
    • A merger producing HHI > 1,800 with delta > 100 is presumptively unlawful (tightened from 2010’s > 2,500 / > 200).
  • Reverted to lower thresholds approximating those used through the 1980s.
  • Added labor monopsony, multi-sided platforms, vertical input foreclosure, serial acquisitions, partial-acquisitions, and acquisition-of-nascent-competitor as standalone guidelines.

Courts and the guidelines

  • United States v Philadelphia National Bank, 374 U.S. 321 (1963) — the structural presumption: a merger producing an undue percentage share of the relevant market (30%) and a significant share increase is presumptively unlawful; the defendant must rebut.
  • FTC v H.J. Heinz, 246 F.3d 708 (D.C. Cir 2001) — modernized the rebuttable-presumption framework; remains the canonical articulation.
  • United States v Anthem-Cigna, 855 F.3d 345 (D.C. Cir 2017); FTC v Sysco, 113 F. Supp 3d 1 (D.D.C. 2015); FTC v Whole Foods, 548 F.3d 1028 (D.C. Cir 2008) — recent applications.
  • FTC v Meta Platforms (Within), 2:22-cv-01378 (N.D. Cal. 2023) — D.C.-style preliminary injunction sought against Meta’s acquisition of Within (VR fitness). Judge Davila denied PI February 2023; FTC dropped administrative case.
  • FTC v Microsoft / Activision — Judge Corley denied PI July 2023; deal closed October 2023. FTC continued administrative trial through 2024 dismissed June 2025.
  • FTC v Tapestry / Capri, 1:24-cv-03109 (S.D.N.Y.) — Judge Rochon enjoined the Tapestry-Capri (Coach-Michael Kors) deal October 2024 — the FTC’s first major win post-Meta/Within; parties abandoned the merger November 2024.

Vertical mergers

  • United States v AT&T / Time Warner, 916 F.3d 1029 (D.C. Cir 2019) — DOJ lost both at trial (Judge Leon) and on appeal; the court applied Nash bargaining models with skepticism. The major recent vertical-merger loss for enforcers.
  • FTC v Illumina / Grail — Fifth Circuit December 2023 vacated FTC’s order requiring divestiture, finding FTC’s vertical-foreclosure theory insufficiently supported; Illumina divested Grail December 2023 anyway.
  • 2020 Vertical Merger Guidelines withdrawn by FTC September 2021 (DOJ retained until 2023 superseded).

Failing firm and weakened-competitor defenses

The failing firm defense (originating in International Shoe v FTC, 280 U.S. 291 (1930)) requires: (i) the firm is unable to meet financial obligations; (ii) cannot reorganize successfully under bankruptcy; (iii) good-faith efforts to find alternative purchasers have failed; (iv) absent the merger, the firm’s assets would exit the market. Rarely successful in litigation but commonly invoked at FTC clearance stage.

Labor and Monopsony

The 2023 Merger Guidelines explicitly extend Clayton § 7 analysis to labor markets (Guideline 11).

No-poach agreements

The DOJ Antitrust Division’s October 2016 Antitrust Guidance for Human Resource Professionals announced that naked no-poach and wage-fixing agreements are per se illegal and subject to criminal prosecution. Cases:

  • United States v Jindal (E.D. Tex. 2022) — first criminal wage-fixing trial; acquitted on antitrust charges; convicted of obstruction.
  • United States v DaVita (D. Colo. 2022) — acquitted on no-poach.
  • United States v Surgical Care Affiliates (N.D. Tex. 2023) — dismissed by DOJ.
  • The DOJ has lost most criminal labor cases at trial — but the legal theory survives, and civil litigation continues.

Franchise no-poach

Deslandes v McDonald’s, 81 F.4th 699 (7th Cir 2023) — reversed dismissal of a § 1 class against McDonald’s franchise no-hire clause; suggested rule of reason rather than per se for intra-brand franchise restraints. Settlements followed at multiple chains 2018-23.

Non-compete clauses

Most non-compete agreements have been treated as employment-law issues, not antitrust. The FTC promulgated a final rule in April 2024 (16 CFR § 910) banning most worker non-competes nationwide. Ryan LLC v FTC, 746 F. Supp 3d 369 (N.D. Tex. Aug 20, 2024) — Judge Brown vacated the rule nationwide as exceeding the FTC’s § 6(g) substantive rulemaking authority and as arbitrary and capricious. Appeal pending in Fifth Circuit; the FTC withdrew the appeal in early 2025 under the Trump administration.

State law continues to evolve. California (Cal Bus & Prof Code § 16600), North Dakota, Oklahoma, Minnesota (effective July 1, 2023), and others have effectively banned worker non-competes.

Platform and Digital-Markets Antitrust

The 2017-2026 docket has been dominated by Big Tech.

Epic Games v Apple, 67 F.4th 946 (9th Cir 2023), cert denied 144 S.Ct 681 (2024)

Filed August 2020 after Apple removed Fortnite from the App Store. Judge Yvonne Gonzalez Rogers (N.D. Cal.) September 2021:

  • Defined market as “digital mobile gaming transactions” — narrower than all mobile platforms but broader than iOS alone.
  • Found Apple did not have monopoly power in that market (App Store ~57% share).
  • Rejected Sherman Act § 1 and § 2 federal claims.
  • Found California Unfair Competition Law violation regarding Apple’s anti-steering rule that prohibited developers from telling users about alternative payment methods. Issued nationwide injunction.

Ninth Circuit affirmed April 2023. Supreme Court denied cert January 2024. Apple’s compliance plan (charging a 27% commission on external payments) was contested in contempt proceedings; Judge Gonzalez Rogers found Apple in civil contempt April 30, 2025 and referred for criminal-contempt investigation. Apple’s revised plan permits external payments without commission as of late 2025.

Epic Games v Google (N.D. Cal.)

Tried November-December 2023. Jury verdict for Epic December 11, 2023 (rare antitrust jury verdict). Judge James Donato issued remedies October 2024 requiring Google to permit alternative app stores within Google Play and to share its app catalog. Google appealed; Ninth Circuit stayed remedies November 2024 pending appeal; arguments February 2025.

NCAA v Alston, 594 U.S. 69 (2021)

Unanimous Court (Gorsuch) affirming Ninth Circuit injunction against NCAA caps on education-related benefits to student-athletes. Applied a rigorous rule-of-reason analysis; rejected NCAA’s argument for “deferential” review of amateurism rules. Justice Kavanaugh’s concurrence — “The NCAA’s business model would be flatly illegal in almost any other industry in America” — invited broader challenges, leading to the 2024 House v NCAA settlement (S.D. Cal., final approval June 2025) restructuring college athletics around revenue sharing.

Ohio v American Express, 585 U.S. 529 (2018)

Two-sided platform decision. 5-4 (Thomas) majority held that plaintiffs must show net anticompetitive effect across both sides of a transaction platform before the rule-of-reason burden shifts. Anti-steering rules (preventing merchants from steering customers to lower-fee networks) were not anticompetitive on this analysis because the merchant fees funded cardholder rewards. The decision’s reasoning has been narrowly cabined in subsequent cases (Apple v Pepper 2019; Visa v Osborn) but its market-definition holding controls platform analysis.

FTC v Meta Platforms, 1:20-cv-03590 (D.D.C.)

Filed December 2020 (re-filed amended complaint August 2021 after first complaint dismissed). Challenges Meta’s Instagram (2012) and WhatsApp (2014) acquisitions as anticompetitive in the “personal social networking” market. Trial began April 14, 2025; closing arguments July 2025; Judge James Boasberg’s decision pending late 2025.

FTC v Amazon.com, 2:23-cv-01495 (W.D. Wash.)

Filed September 2023 by FTC plus 17 state AGs. Alleges Amazon monopolization of two markets — online superstore for shoppers and online marketplace services for sellers. Theories: anti-discounting and fair-pricing policies; Prime tying and Buy Box manipulation; coerced advertising. Judge John Chun denied most motion-to-dismiss arguments September 2024; trial scheduled February 2026.

Other notable platform cases

  • Spotify EU Commission case (€1.8B fine March 2024) on Apple anti-steering for music streaming.
  • DOJ v Visa (S.D.N.Y. 2024) — debit card monopolization.
  • DOJ v RealPage (M.D. Tenn. 2024) — algorithmic price-fixing for multifamily rental housing.
  • In re Generic Pharmaceuticals Pricing Antitrust Litigation (E.D. Pa., MDL 2724) — large multi-state cartel case.

EU Competition — Comparison

TFEU Articles 101 and 102

  • Article 101(1) prohibits agreements between undertakings, decisions by associations, and concerted practices that may affect trade between Member States and have as their object or effect the prevention, restriction, or distortion of competition.
  • Article 101(2) voids such agreements automatically.
  • Article 101(3) provides an exemption for agreements that contribute to economic efficiency and pass benefits to consumers without eliminating competition for a substantial part of the products.
  • Article 102 prohibits abuse of a dominant position. Unlike US monopolization, no requirement of “willful acquisition or maintenance” — mere abuse of existing dominance suffices.

Vertical Block Exemption Regulation (VBER)

Regulation (EU) 2022/720, effective June 1, 2022 — exempts vertical agreements with combined market shares below 30% if they do not contain hardcore restrictions (resale price maintenance, absolute territorial protection, etc.).

Major EU 102 cases

  • Intel v Commission, Case T-286/09 RENV (Gen. Ct. 2022) — €1.06B fine annulled; loyalty rebates may be abusive but require “as-efficient-competitor” (AEC) economic test. Pending re-appeal at CJEU as of 2026.
  • Google Shopping, Case T-612/17 (Gen. Ct. November 2021) — €2.42B fine upheld; self-preferencing of Google Shopping over rival comparison-shopping services. CJEU affirmed September 2024 (Case C-48/22 P).
  • Google Android, Case T-604/18 (Gen. Ct. September 2022) — €4.34B fine (reduced from €4.34B to €4.125B) upheld; tying of Google Search and Chrome to Play Store on Android phones. CJEU appeal pending.
  • Google AdSense, Case T-334/19 — €1.49B fine annulled by Gen. Ct. September 2024; Commission appealing.
  • Apple App Store / Music Streaming — Commission decision March 2024, €1.8 billion fine for restrictions on alternative payment methods; appeal pending Gen. Ct.

Merger Regulation 139/2004

Phase I (25 working days, extended to 35 with commitments) and Phase II (90 working days, extended to 105 or 125 with commitments) review. Jurisdictional thresholds based on combined and per-party EU and worldwide turnover. The 2024 Illumina/Grail judgment (CJEU Case C-611/22 P, September 2024) invalidated the Commission’s use of Article 22 referral to take jurisdiction over below-threshold deals; the Commission shifted to encouraging Member State call-ins.

Digital Markets Act (DMA)

Regulation (EU) 2022/1925, in force November 1, 2022, applied to designated gatekeepers from March 2024.

  • Gatekeeper criteria — providers of “core platform services” meeting quantitative thresholds (€7.5 billion EEA turnover or €75 billion market cap; 45 million EU monthly active end users + 10,000 yearly business users; entrenched and durable position) and qualitative confirmation.
  • Designations (September 2023) — Alphabet, Amazon, Apple, ByteDance, Meta, Microsoft, with 22 core platform services (Apple App Store, Apple Safari, iOS, Google Search, Chrome, Play, Maps, Ads, YouTube, Android, Amazon Marketplace, Amazon Ads, Facebook, Instagram, WhatsApp, Messenger, Meta Marketplace, Meta Ads, LinkedIn, TikTok, Windows, Microsoft Ads). Booking.com added May 2024.
  • Substantive obligations (Arts 5-7) — interoperability of messaging, ban on self-preferencing, ban on combining personal data across services without consent, free choice of default browser/search/voice assistant, sideloading (Apple iOS) and alternative app stores, business-user data portability.
  • Penalties — up to 10% of total worldwide turnover; up to 20% for repeat infringements; periodic penalty payments up to 5% of average daily worldwide turnover.

Enforcement actions opened March 2024:

  • Apple (default browser, App Store steering).
  • Alphabet (Search self-preferencing, Play steering).
  • Meta (consent for combining data).

First non-compliance decisions issued April 2025: Apple €500M for App Store steering; Meta €200M for pay-or-consent model. Apple and Meta appealing.

Digital Services Act (DSA)

Regulation (EU) 2022/2065, in force November 16, 2022, applied to designated VLOPs/VLOSEs from August 2023.

  • VLOPs (Very Large Online Platforms) and VLOSEs (Very Large Online Search Engines) — ≥ 45M EU monthly active users.
  • Designations August 2023 — 19 platforms including Amazon Store, Apple App Store, Booking, Facebook, Google (Search, Play, Maps, Shopping, YouTube), Instagram, LinkedIn, Pinterest, Snapchat, TikTok, X (Twitter), Wikipedia, Zalando, Bing. Adult content sites Pornhub, Stripchat, XVideos designated December 2023.
  • Obligations — content-moderation transparency, ad-targeting limits, dark-patterns prohibition, recommender-system explanations and choice, illegal-content responsiveness, risk assessment and audit, crisis response, data access for researchers.
  • Penalties — up to 6% of worldwide annual turnover.

DSA enforcement actions opened 2024:

  • TikTok (TikTok Lite addictive features) — TikTok Lite withdrawn April 2024.
  • X (content moderation, blue check verification, ad repository).
  • Meta (content moderation, deceptive design).

UK CMA Post-Brexit

The Competition and Markets Authority (CMA) has emerged as a parallel global gatekeeper. Notable divergences:

  • Microsoft / Activision — CMA Phase 2 decision April 2023 blocked the deal on cloud-gaming theory; Microsoft restructured (Ubisoft acquired cloud rights ex-EEA outside Microsoft) and CMA cleared revised deal October 2023.
  • Meta / Giphy — CMA ordered divestiture November 2021, upheld by Competition Appeal Tribunal 2022; Meta sold to Shutterstock May 2023.
  • Adobe / Figma — abandoned December 2023 after CMA Phase 2 substantial-lessening-of-competition finding.
  • Apple / Google mobile browsers market investigation — Final Order March 2024 imposing conduct remedies; broader DMCC Act 2024 strategic market status investigations opened January 2025 on Apple and Google.

The Digital Markets, Competition and Consumers Act 2024 (DMCC Act), in force January 2025, gives CMA strategic-market-status (SMS) designation power analogous to DMA gatekeepers, with conduct requirements and pro-competition interventions.

Remedies

Civil remedies

  • Injunction — primary remedy. California v ARC America, 490 U.S. 93 (1989) — state indirect-purchaser actions allowed alongside Illinois Brick v Illinois, 431 U.S. 720 (1977) federal direct-purchaser rule.
  • Damages — Clayton § 4 treble damages plus reasonable attorney’s fees and costs.
  • Disgorgement — historically available under § 13(b) FTC Act, eliminated by AMG Capital (2021).
  • Structural — divestiture in merger and conduct cases. Microsoft initial breakup remedy (vacated). AT&T 1984 breakup. Standard Oil 1911 breakup.

Criminal remedies

Reserved for hardcore cartels. Sherman § 1 individual maximum 10 years; corporate $100 million per count or twice gain/loss under 18 USC § 3571(d). DOJ leniency program (1993, revised 1993 + 2008 + 2017 + 2022) — first-in cooperators receive amnesty.

Class actions

The 23(b)(3) damages class action drives most private antitrust litigation. Wal-Mart Stores v Dukes, 564 U.S. 338 (2011) and Comcast v Behrend, 569 U.S. 27 (2013) tightened class certification (commonality, predominance). Tyson Foods v Bouaphakeo, 577 U.S. 442 (2016) permitted representative-evidence proof in some contexts.

Statutes of Limitations and Procedure

  • Sherman/Clayton civil: 4 years (15 USC § 15b); accrual generally at injury, continuing-violation doctrine can extend.
  • Sherman criminal: 5 years (18 USC § 3282).
  • FTC § 5: no statute of limitations for administrative actions; § 13(b) injunctions subject to laches.
  • Twombly + Iqbal plausibility pleading particularly significant in antitrust — Bell Atlantic v Twombly, 550 U.S. 544 (2007) was an antitrust case requiring plausible allegation of conspiracy (parallel conduct + plus factors).

Recurring Doctrinal Themes

  • State action immunity — Parker v Brown, 317 U.S. 341 (1943); North Carolina Board of Dental Examiners v FTC, 574 U.S. 494 (2015) — state-action protection requires clearly articulated state policy plus active supervision when private actors regulated.
  • Noerr-Pennington — petitioning government immune from antitrust unless “sham” — Eastern Railroad Presidents Conference v Noerr Motor Freight, 365 U.S. 127 (1961); California Motor Transport v Trucking Unlimited, 404 U.S. 508 (1972); Professional Real Estate Investors v Columbia Pictures, 508 U.S. 49 (1993).
  • Foreign Trade Antitrust Improvements Act (FTAIA) (15 USC § 6a) — Sherman Act reaches foreign conduct with “direct, substantial, and reasonably foreseeable effect” on US domestic, import, or export commerce. F. Hoffmann-La Roche v Empagran, 542 U.S. 155 (2004) — foreign-injured plaintiffs cannot sue for foreign harm; Animal Science Products v Hebei Welcome Pharmaceutical, 585 U.S. 33 (2018) — foreign sovereign legal-question deference is respectful not binding.
  • Antitrust standing — Associated General Contractors v California State Council of Carpenters, 459 U.S. 519 (1983) — multi-factor analysis: nature of injury, directness, speculative damages, duplicative recovery, complexity in apportionment.

Section 5 FTC Standalone Authority

The FTC’s November 10, 2022 Policy Statement Regarding the Scope of Unfair Methods of Competition Under Section 5 of the Federal Trade Commission Act reasserted standalone § 5 UMC authority distinct from Sherman / Clayton coverage. Test articulated:

  • Conduct may be coercive, exploitative, collusive, abusive, deceptive, predatory, or involve the use of economic power of a similar nature; and
  • Tend to negatively affect competitive conditions.

The policy expressly reaches conduct beyond Sherman + Clayton — invitations to collude, parallel-exclusionary conduct below conspiracy threshold, mergers below thresholds, loyalty rebates, certain non-competes. Courts gave mixed reception:

  • FTC v Facebook (Meta) — Judge Boasberg’s June 2021 dismissal noted skepticism of broad § 5 theory; second amended complaint refiled.
  • FTC v Endo Pharmaceuticals — settled 2024.

History — FTC v Cement Institute, 333 U.S. 683 (1948); FTC v Sperry & Hutchinson, 405 U.S. 233 (1972) — confirmed § 5 broader than Sherman. Boise Cascade v FTC, 637 F.2d 573 (9th Cir 1980); E.I. du Pont v FTC (Ethyl), 729 F.2d 128 (2d Cir 1984) — D.C. + 2d Cir narrowed in 1980s, holding facilitating practices required at least incipient Sherman violation.

State Attorney General Antitrust

State AGs have brought increasing antitrust enforcement in the post-2018 era:

  • Multi-state generic-drug cases — Connecticut-led coalition (50 AGs by 2023), In re Generic Pharmaceuticals Pricing Antitrust Litigation, MDL 2724.
  • Texas-led Google ad-tech — filed December 2020 alongside DOJ track.
  • California v Amazon — filed September 2022 challenging Amazon pricing parity.
  • D.C. v Amazon — filed May 2021, dismissed March 2022 on technicalities; D.C. did not refile (federal case followed).
  • NY v Facebook — filed December 2020 alongside FTC; dismissed June 2021 on laches but plaintiffs continued via federal vehicles.
  • Texas v Google search — initial complaint December 2020; merged into DOJ v Google on coordinated discovery + parallel tracks 2022-23.

Parens patriae authority under 15 USC § 15c (Hart-Scott-Rodino Title III amendment 1976) permits AGs to sue on behalf of natural-person citizens.

International Comity and Foreign Sovereign Compulsion

  • Hartford Fire Insurance v California, 509 U.S. 764 (1993) — reach of Sherman Act to foreign defendants; comity considered narrowly.
  • F. Hoffmann-La Roche v Empagran, 542 U.S. 155 (2004) — FTAIA precludes foreign-injured foreign purchasers’ suits for foreign harm.
  • Animal Science Products v Hebei Welcome Pharmaceutical, 585 U.S. 33 (2018) — Supreme Court held that federal courts owe Chinese government’s interpretation of its own law respectful but not binding consideration; Chinese vitamin C cartel rebuttal that conduct was state-compelled rejected on remand (Animal Science, 6th Cir 2021).
  • Foreign sovereign compulsion defense — extreme: conduct must be objectively required by foreign sovereign with sanction for non-compliance.
  • Act of state doctrine — separate from sovereign compulsion; bars judging legality of foreign sovereign’s official acts in own territory (Banco Nacional de Cuba v Sabbatino, 376 U.S. 398 (1964)).

Global Convergence and Divergence

Around 140 jurisdictions now have competition / antitrust laws. Major players:

  • EU Commission DG COMP — see eu-competition-and-regulation for depth.
  • UK CMA — diverging post-Brexit; DMCC Act 2024 strategic-market-status regime parallel to DMA.
  • China SAMR (State Administration for Market Regulation) — Anti-Monopoly Law 2008, revised 2022. Major cases: Alibaba (¥18.2 billion fine April 2021); Meituan (¥3.4 billion October 2021); Tencent restructuring orders. Mergers reviewed under AML; jurisdictional thresholds (RMB 4 billion global + RMB 800 million China parties).
  • Japan JFTC — Anti-Monopoly Act; Designated Digital Platform Operator framework.
  • Korea KFTC — Monopoly Regulation and Fair Trade Act; “Apple ITC and KFTC” April 2024 ruling on App Store rules.
  • Brazil CADE — Lei 12.529/2011; very active merger control.
  • India CCI (Competition Commission of India) — Competition Act 2002 (revised 2023); Google Android ₹1,338 crore fine October 2022 upheld by NCLAT 2023.
  • Australia ACCC — Competition and Consumer Act 2010; News Media Bargaining Code 2021 (Meta + Google news payments).
  • Canada Competition Bureau — Competition Act amended 2022 + 2024 (efficiencies defense narrowed; abuse-of-dominance reforms).

Key divergences from US:

  • Effects-based remedy — most non-US regimes accept lower threshold (Sherman § 1 “may” / EU 101 “may affect” vs US Clayton § 7 “may be substantially”).
  • Behavioral remedies more common abroad; structural remedies more common in US.
  • EU + UK + China openly accept self-preferencing as Article 102 / DMA / abuse — US courts more skeptical (Google Mehta decision more limited than EU).
  • Discovery and treble damages — uniquely US plaintiff-friendly; EU follow-on damages developing under Directive 2014/104.
  • Criminal antitrust — US (DOJ) + UK (Enterprise Act 2002 cartel offense) + Australia + Canada actively criminalize; EU does not (Commission only civil).

Practical Practice Notes

  • Merger clearance timeline — typical complex transaction now requires 9-15 months of antitrust review across DOJ/FTC + EU + UK + China SAMR + Brazil CADE + others. The era of “one-stop” review is over.
  • Document discipline — corporate documents drive every antitrust case. The cardinal rule for any in-house lawyer: assume every memo will be read aloud in court.
  • Compliance programs — DOJ Antitrust Division Evaluation of Corporate Compliance Programs (revised July 2019, updated 2023) — credit available for genuine programs.
  • Hot documents — DOJ + FTC + plaintiffs lean heavily on internal communications calling competitors “the enemy,” products to “kill,” prices to “set,” shares to “lock up.”
  • Privilege — particularly common-interest privilege in joint-defense and co-counsel contexts; carefully managed under Upjohn standards.
  • HSR filing strategy — 4(c)/4(d) ordinary-course documents are first-line discovery; deal teams routinely audit pre-merger communications for hot-document risk.
  • Second Requests — typical scope 50+ custodians, 5+ years, multiple million documents reviewed; TAR / predictive coding standard.
  • Vertical-deal counseling — post-AT&T/Time Warner defense bar more confident on vertical; agencies more skeptical particularly on input foreclosure + access to rivals’ information.
  • Labor antitrust — HR teams should audit hiring agreements + benchmarking + information exchange for naked no-poach risk; criminal-side caution.
  • Pricing-algorithm scrutiny — RealPage template + state AG follow-on litigation; algorithmic price-fixing emerging risk area.
  • Class action coordination — multi-district + multi-court coordination (federal MDL + state-court parallel + Canadian + EU follow-on damages) common in major cases.

Statutes Quick Reference

  • 15 USC § 1 — Sherman § 1 (combinations + conspiracies).
  • 15 USC § 2 — Sherman § 2 (monopolization, attempt, conspiracy).
  • 15 USC § 13 — Robinson-Patman Act (price discrimination).
  • 15 USC § 14 — Clayton § 3 (exclusive dealing, tying).
  • 15 USC § 15 — Clayton § 4 (treble damages + attorney’s fees).
  • 15 USC § 18 — Clayton § 7 (mergers).
  • 15 USC § 18a — Hart-Scott-Rodino (premerger notification).
  • 15 USC § 19 — Clayton § 8 (interlocking directorates).
  • 15 USC § 41-58 — FTC Act.
  • 15 USC § 45 — FTC § 5 (UMC + UDAP).
  • 15 USC § 6a — FTAIA (foreign-trade).
  • 15 USC § 12 — Clayton § 12 (nationwide service).
  • 28 USC § 1407 — MDL.

Algorithmic Pricing and Hub-and-Spoke Theories

The emerging frontier of antitrust attention is algorithmic / software-mediated coordination.

In re RealPage Rental Software Antitrust Litigation

MDL 3071 (M.D. Tenn., Judge Crenshaw). DOJ v RealPage filed August 2024 alleges algorithmic price-fixing — RealPage’s “Revenue Management” software aggregates competitively sensitive landlord pricing data and outputs coordinated rent recommendations. Hub-and-spoke theory — RealPage is the hub; participating landlords are the spokes; the rim is the shared algorithm. Cases against Yardi, AppFolio similar.

State AG follow-on: D.C. (October 2023), Arizona (February 2024), North Carolina (September 2024).

  • Interstate Circuit v United States, 306 U.S. 208 (1939) — hub-and-spoke conspiracy (Paramount movie studios + film distributor). Knowing parallel action + facilitation through hub.
  • Toys “R” Us v FTC, 221 F.3d 928 (7th Cir 2000) — vertical hub-and-spoke § 1 violation.
  • United States v Apple (e-books), 791 F.3d 290 (2d Cir 2015) — per se § 1 violation via hub-and-spoke MFN-architecture with publishers; Apple organized horizontal price-fixing.

Algorithmic / AI-driven pricing — separate concerns:

  • Tacit collusion via algorithmic best response (no explicit agreement).
  • Self-learning algorithms learning to collude (Calvano-Calzolari-Denicolò-Pastorello 2020 experimental work).
  • DOJ + FTC Joint Statement on Algorithmic Collusion (March 2024).

Antitrust Damages

Treble damages

Clayton § 4 — automatic trebling of actual damages plus reasonable attorney’s fees + costs. Powerful private-enforcement engine.

Damages methodology

  • But-for analysis — what would prices/quantities have been absent the violation? Yardstick (comparable market), before-and-after, econometric models (reduced-form, structural).
  • Pass-through — Hanover Shoe v United Shoe Machinery, 392 U.S. 481 (1968) — direct purchaser’s pass-through defense barred.
  • Direct-purchaser standing — Illinois Brick v Illinois, 431 U.S. 720 (1977) — indirect purchasers may not sue under federal antitrust.
  • State Illinois Brick repealers — many states (Cal, NY, FL, IL) permit indirect-purchaser claims.
  • Apple v Pepper, 587 U.S. 273 (2019) — iOS App Store users were direct purchasers from Apple for Illinois Brick purposes; opened iOS App Store user litigation.

Joint and several liability

Antitrust co-defendants jointly and severally liable. Modern reform proposals (de-trebling, no joint-and-several) have not advanced.

Settlements

Often dwarfing trial verdicts — Visa/MasterCard interchange (3.4B class action 2020); Forex Antitrust (1.86B 2014); LIBOR ($1B+ across cases).

Key Modern Cases — Quick Index

  • Twombly, 550 U.S. 544 (2007) — plausibility pleading (antitrust).
  • Leegin, 551 U.S. 877 (2007) — RPM rule of reason.
  • Pacific Bell v linkLine, 555 U.S. 438 (2009) — price squeeze.
  • Brunswick Corp v Pueblo Bowl-O-Mat, 429 U.S. 477 (1977) — antitrust injury.
  • Cargill v Monfort, 479 U.S. 104 (1986) — competitor standing.
  • Associated General Contractors v California State Council of Carpenters, 459 U.S. 519 (1983) — standing factors.
  • Trinko, 540 U.S. 398 (2004) — no general duty to deal.
  • Aspen Skiing, 472 U.S. 585 (1985) — limited duty to deal.
  • AmEx, 585 U.S. 529 (2018) — two-sided platforms.
  • Alston, 594 U.S. 69 (2021) — NCAA scholarship limits.
  • Mallory v Norfolk Southern, 600 U.S. 122 (2023) — consent-by-registration jurisdiction.
  • Sherman Act v Clayton Act distinction — Sherman criminal + civil; Clayton civil + treble damages.

Adjacent

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