Paul Saint-Antoine has 30 years of experience defending companies sued under the federal and state antitrust statutes. Clients also regularly seek his advice on an array of competition issues, including those relating to intellectual property licensing and standards-setting. Paul co-leads the firm’s antitrust practice team.


Paul’s antitrust practice covers products and services in the pharmaceutical, computer, software, paper, telecommunications, food and beverage, energy, transportation, insurance and health care sectors. He has litigated in high-profile antitrust matters throughout the country, involving claims such as:

  • Price-fixing and other cartel activity
  • Monopolization and attempted monopolization
  • Unlawful tying and bundling
  • Anticompetitive distribution agreements
  • Unlawful patent settlements
  • Group boycotts
  • Price discrimination
  • Unlawful mergers and acquisitions

Representative Experience

  • Counsel to a large health care company and liaison counsel for defendants in an antitrust class action involving allegations of price fixing. In July 2018, the district court granted preliminary approval to a class action settlement. In re Blood Reagents Antitrust Litigation (E.D. Pa.).
  • Co-counsel to pharmaceutical company and liaison counsel for defendants in antitrust class action involving claims of anticompetitive patent settlements brought by direct and indirect purchasers of cholesterol medication. In re Niaspan Antitrust Litigation (E.D. Pa.).
  • Co-counsel for pharmaceutical company in enforcement action alleging violations of Section 5 of the FTC Act by brand name and generic manufacturers of testosterone medication. The district court dismissed the conspiracy claim, and the case proceeded to trial on a theory of “sham” patent litigation. Federal Trade Commission v. AbbVie, Inc. (E.D. Pa.). The judgment is on appeal to the Third Circuit.
  • Counsel for plaintiff wireless phone manufacturer in antitrust monopolization claim, alleging anticompetitive conduct by holder of patents declared to be essential to certain cellular standards. Settled. Microsoft Mobile, Inc., et al. v. InterDigital, Inc., et al. (D. Del.).
  • Counsel to pharmaceutical company and co-counsel to a pharmacy benefits manager in antitrust class action, alleging unlawful monopsony conduct in drug reimbursement rates. In re Pharmacy Benefit Managers Antitrust Litigation (E.D. Pa.).
  • Counsel to pharmaceutical company in California Superior Court, involving nationwide price-fixing allegations against numerous brand name drug manufacturers. Summary judgment granted to defendants on all counts, and decision upheld on appeal. Clayworth v. Pfizer, et al. (Cal. Sup. Ct.).
  • Counsel to a distributor of dental products in antitrust class action stemming from a DOJ enforcement action. The case involved allegedly unlawful exclusive distribution agreements. In re Dentsply Antitrust Litigation (D. Del.). Dismissal affirmed by Third Circuit.
  • Counsel to chemical company in litigation alleging an agreement to suppress generic competition in cough and cold medication. Summary judgment in favor of defendants on all antitrust claims. Hi-Tech Pharmacal v. Jame Fine Chemical and Carter Wallace (D.N.J.).
  • Counsel for trade association in antitrust action alleging unlawful exclusionary conduct. Settled. IDT Corporation, et al. v. Building Owners and Manager Association International, et al. (D.N.J.).
  • Counsel for hospital system and affiliated ambulance service in Section 1 tying and monopolization case. Offer of judgment accepted by the plaintiff. Med Alert Ambulance Inc. v. Atlantic Health System Inc., et al. (D.N.J.).
  • Co-counsel for leading paper manufacturer in price-fixing class action involving Oriented Strand Board. Settled. In re OSB Antitrust Litigation (E.D. Pa.).
  • Counsel for leading paper manufacturer in price-fixing class action and in related opt-out litigation. Settled. In re Linerboard Antitrust Litigation (E.D. Pa.).
  • Co-counsel for athletic association in a Sherman Act case brought by owners of for-profit basketball camps; summary judgement granted in favor of defendant. Pocono Invitational Sports Camp, Inc., et al. v. National Collegiate Athletic Association (E.D. Pa.).

Class Actions

Antitrust class actions are prominent among high-stakes civil cases, and they invariably involve complex procedural and substantive issues. Paul has served as liaison counsel and lead defense counsel in some of the largest antitrust class actions, within and outside the Third Circuit, and he has argued on behalf of antitrust defendants in a number of precedent-setting appeals, including the Third Circuit’s 2010 Dentsply decision and its 2015 Blood Reagents decision.

Representative Experience

  • Paul argued an appeal of a class certification decision on behalf of a leading health care company. The Third Circuit, in vacating the district court’s order, held for the first time that: “a plaintiff cannot rely on challenged expert testimony, when critical to class certification, to demonstrate conformity with Rule 23 unless the plaintiff also demonstrates, and the trial court finds, that the testimony satisfies the standard set out in Daubert.” Id. at 187. In re Blood Reagents Antitrust Litigation, 783 F.3d 183 (3d Cir. 2015).
  • Paul argued on behalf of a group of dental dealers, in an appeal of a dismissal order entered in their favor. In affirming the dismissal, the Third Circuit agreed with the district court that the plaintiffs had not adequately alleged a “hub and spoke” conspiracy. Id. at 257 (“The Plaintiffs have failed to allege any facts plausibly suggesting a unity of purpose, a common design and understanding, or a meeting of the minds between and among Dentsply and all of the dealers.”). In re Dentsply Antitrust Litigation, 602 F.3d 237 (3d Cir. 2010).


Bar Admissions

New Jersey

Court Admissions

New Jersey Supreme Court
Pennsylvania Supreme Court
U.S. Court of Appeals for the Third Circuit
U.S. District Court for the Eastern District of Michigan
U.S. District Court for the Eastern District of Pennsylvania
U.S. District Court for the District of New Jersey


Columbia Law School
J.D. (1989)

Kenyon College
A.B. summa cum laude (1986)

Insights & Events

Leadership & Community

Pro Bono

Paul has a long history of pro bono work since the 1990s when he represented Philadelphia’s foster children in the Baby Neal litigation. From 2006 to 2017, he was on the board of directors of the Public Interest Law Center of Philadelphia, and is currently a member of the advisory board of Pennsylvanians for Modern Courts. In 2016, the Education Law Center recognized Paul and his colleague, Chanda Miller, with a Pro Bono Award for their work representing special education students and their parents in the Philadelphia School District.

Professional Associations

  • Pennsylvanians for Modern Courts — Advisory Board, 2018-present
  • Public Interest Law Center — Board, 2006-17
  • American Bar Association  —  Antitrust Section (Vice Chair, Pricing Conduct Committee, 2018-present; Co-chair, Intellectual Property Committee, 2008-11)
  • Philadelphia Bar Association

Firm Leadership

  • Co-leader, Antitrust Practice Team 
  • Drinker Biddle & Reath LLP — Co-chair, Antitrust Team, 2003-20


  • Chambers USA — Pennsylvania, Antitrust, 2003-20
  • Benchmark Litigation — "Local Litigation Star," 2017-19
  • Faegre Drinker — Pro Bono Honor Roll, 2020
  • Education Law Center — Pro Bono Award, 2016
  • American Bar Foundation — Fellow
  • Litigation Counsel of America — Fellow

Awards Methodology

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