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Derek T. Ho

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Mr. Ho is a partner in the firm specializing in appellate and complex commercial litigation.  Mr. Ho has particular expertise and experience in class actions and MDL proceedings, antitrust law, the False Claims Act, and fiduciary litigation.  Mr. Ho also has unparalleled experience representing litigation finance firms and litigants that receive litigation funding.

Noteworthy Representations

Mr. Ho represented clients in three of the U.S. Supreme Court’s most significant recent class action decisions, and prevailed in all three.  See Amgen Inc. et al. v. Connecticut Retirement Plans and Trust Funds, 133 S. Ct. 1184 (2013); American Express Co. v. Italian Colors Restaurant, 133 S. Ct. 2304 (2013); Tyson Foods v. Bouaphakeo, 136 S. Ct. 1036 (2016).  In addition to his appellate work, Mr. Ho has also represented numerous clients at the district court level, both supporting and opposing class certification. 

Mr. Ho has served as lead counsel in numerous appeals in federal and state courts, including the First, Second, Fourth, Sixth, Eighth, Tenth, and Eleventh Circuits.  His notable representations include serving as appellate counsel hired by Plaintiffs’ Steering Committees to represent thousands of plaintiffs in several large MDLs.  See Juanita Hempstead v. Pfizer, Inc., No. 17-1140 (4th Cir. 2018); Chapman v. Procter & Gamble Distributing LLC, 766 F.3d 1296 (11th Cir. 2014); In Re: Zoloft, No. 16-2247 (3d Cir. 2017) (co-counsel with David Frederick).

Mr. Ho has extensive experience in antitrust litigation and counseling.  At the Supreme Court, he helped secure victories for his clients in three seminal antitrust cases, Ohio v. American Express Co., 138 S. Ct. 2274 (2018), American Express Co. v. Italian Colors Restaurant, 133 S. Ct. 2304 (2013), and Bell Atlantic Corp. v. Twombly, 550 U.S. 544 (2007).  He has represented both plaintiffs and defendants as lead counsel in federal appellate and district courts across the country.  In July 2017, Global Competition Review named Mr. Ho, along with his partners Michael Nemelka and Aaron Panner, “Litigators of the Week” for successfully obtaining a rare preliminary injunction on behalf of their client, Authenticom, Inc.  In April 2018, citing his extensive antitrust litigation experience, Judge Amy St. Eve named Mr. Ho MDL Co-Lead Counsel in In re Dealer Management Systems MDL, MDL No. 2817 (N.D. Ill.).  Mr. Ho has also successfully represented defendants in criminal antitrust investigations by the Department of Justice, helping to obtain rare non-prosecution agreements in two recent cases, and he regularly provides antitrust counseling to prominent U.S. companies.

Mr. Ho successfully represented the relators in Universal Health Servs. v. United States ex rel. Escobar, 136 S. Ct. 1989 (2016), which affirmed the “implied false certification” theory of liability under the False Claims Act.  The Supreme Court’s decision vindicated Mr. Ho’s prior victory on behalf of the relator in New York v. Amgen Inc., 652 F.3d 103 (1st Cir. 2011).  Mr. Ho also has extensive trial-level experience in FCA cases.  His work for relators has helped generate more than $1 billion in settlements, while his work for defendants has resulted in dismissal of FCA claims asserting multiple billions of dollars in damages. 

Mr. Ho has successfully represented litigation finance companies in precedent-setting cases affecting the litigation finance industry.  In a string of victories, Mr. Ho helped establish the principle that communications between a litigant and a litigation funder are protected by the attorney-client privilege and/or work-product doctrine.  See Viamedia, Inc. v. Comcast Corp., No. 16-C-5486, 2017 WL 2834535 (N.D. Ill. 2017); In re International Oil Trading Co., 548 B.R. 825 (Bankr. S.D. Fla. 2016); Charge Injection Techs., Inc. v. E.I. DuPont De Nemours & Co., No. 07C-12-134-JRJ, 2015 WL 1540520 (Del. Super. Ct. Mar. 31, 2015); Devon IT, Inc. v. IBM Corp., No. CIV.A. 10-2899, 2012 WL 4748160 (E.D. Pa. Sept. 27, 2012).  Mr. Ho has also successfully defended against allegations that litigation funding violates state-law champerty and maintenance doctrines.  See Charge Injection Techs., Inc. v. E.I. DuPont De Nemours & Co., No. 07C-12-134-JRJ, 2016 WL 937400 (Del. Super. Ct. Mar. 9, 2016).  

Mr. Ho has deep expertise in trust and fiduciary law (e.g., agency, business judgment rule).  His victories include a trial win and affirmance by the Delaware Supreme Court in a high-profile family trust lawsuit.  See In re Trust for Grandchildren, No. 1165-VCN, 2011 WL 3444569 (Del. Ch. July 29, 2011), aff’d sub nom. Otto v. Gore, 45 A.3d 120 (Del. 2012). 

Selected Appellate Experience

Mr. Ho has served as lead appellate counsel in numerous state and federal cases, including in the First, Second, Fourth, Sixth, Eighth, Tenth, and Eleventh Circuits, as well as state appellate and supreme courts.  He has also been the principal author of numerous merits and amicus briefs in the U.S. Supreme Court.

U.S. Supreme Court Merits Cases

  • Ohio v. American Express Co., 138 S. Ct. 2274 (2018)
  • Janus v. AFSCME, 138 S. Ct. 2448 (2018)
  • Universal Health Services v. United States ex rel. Escobar, 136 S. Ct. 1989 (2016)
  • Friedrichs v. California Teachers Ass’n, 136 S. Ct. 1083 (2016)
  • Tyson Foods, Inc. v. Bouaphakeo, 136 S. Ct. 1036 (2016)
  • American Express Co. v. Italian Colors, 133 S. Ct. 2304 (2013)
  • Amgen, Inc. v. Connecticut Retirement Plans, 133 S. Ct. 1184 (2013)
  • CSX Transp., Inc. v. McBride, 131 S. Ct. 2630 (2011)
  • Bruesewitz v. Wyeth, 131 S. Ct. 1068 (2011)
  • Mississippi v. City of Memphis, 130 S. Ct. 1317 (2010)
  • 14 Penn Plaza LLC v. Pyett, 556 U.S. 247 (2009)
  • Safeco Ins. Co. of Am. v. Burr, 551 U.S. 47 (2007)

U.S. Supreme Court Amicus Briefs   

Represented administrative law professors supporting the United States in United States v. Texas, 136 S. Ct. 2271, defending the Obama Administrations “DAPA Memo” from challenge under the APA.    

Represented U.S. historians supporting the United States and other respondents in Shelby County v. Holder, 133 S. Ct. 2612, defending the constitutionality of § 5 of the Voting Rights Act. 

Represented political science professors supporting challengers to Michigan’s Proposition 2, which bans state universities from considering race in admissions.  See Schuette v. Coalition to Defend Affirmative Action v. Regents of Univ. of Michigan, 134 S. Ct. 1623. 

Represented distinguished UT alumni defending the University of Texas’s admissions program against Equal Protection challenge in Fisher v. University of Texas, S. Ct. 2411.

Represented industrial-organizational psychologists supporting the City of New Haven in Ricci v. DeStefano. Amicus brief was cited repeatedly by the dissent. See 129 S. Ct. 2658, 2689 (2010) (op. of Ginsburg, J.).

Lower Appellate Cases

  • Wood v. Allergan, No. 17-2191 (2d Cir.) (pending)
  • Juanita Hempstead v. Pfizer, Inc., No. 17-1140 (4th Cir.) (pending)
  • Chapman v. Procter & Gamble Distributing LLC, 766 F.3d 1296 (11th Cir. 2014)
  • WFC Holdings v. United States, 728 F.3d 736 (8th Cir. 2013)
  • Otto v. Gore, 45 A.3d 120 (Del. 2012)
  • New York v. Amgen, Inc., 652 F.3d 103 (1st Cir. 2011)

Selected Trial Experience  

Serve as co-lead counsel and represent multiple individual plaintiffs in a major antitrust litigation against the two leading providers of dealer management systems, CDK Global, LLC and The Reynolds & Reynolds Company. See In re Dealer Management Systems Antitrust Litigation, MDL No. 2817 (N.D. Ill.) 

Represent Viamedia Corporation in an antitrust suit alleging unlawful tying and exclusive dealing in the local cable advertising representation market. The Court has denied Comcast’s motion to dismiss and the parties have completed discovery. See Viamedia Inc. v. Comcast Corp., No. 16-cv-05486 (N.D. Ill.) 

Represent relator in federal and state FCA litigation involving fraudulent upcoding at Florida skilled nursing facilities.  Argued summary judgment motion and Daubert motions.  Trial resulted in judgment of almost $350 million.  See United States ex rel. Ruckh v. Genoa Healthcare, LLC, No. 11-1303 (M.D. Fla.).  Currently lead counsel on appeal. 

In what has been hailed as an “important taxpayer victory,” represented Wells Fargo & Company in challenge to IRS subpoena seeking company’s “tax accrual workpapers” on the ground that the workpapers are protected by the work-product doctrine.  Conducted direct examination of Wells Fargo’s lead expert and cross-examined the government’s expert at multi-day evidentiary hearing.  The district court held that the measurement and analysis contained in those papers was protected from discovery.  See Wells Fargo & Co. v. United States, 2013 WL 2444639 (June 4, 2013). 

Trial counsel in Delaware Court of Chancery case involving the effect of a strategic adult adoption on the distribution of principal under a trust, as well as a dispute over the terms of the governing trust instrument.  Conducted direct examination of multiple witnesses, including all of our clients’ expert witnesses, during two-phase trial.  Court of Chancery ruled in favor of the firm’s clients on all issues.  See In re Trust for Grandchildren, No. 1165-VCN, 2011 WL 3444569 (Del. Ch. July 29, 2011).  Also represented co-trustees in related litigation, which settled on favorable terms. 

Represented relator in case alleging that Amgen, Inc. violated federal and state False Claims Acts by causing the submission of fraudulent claims to Medicare and Medicaid for “overfill” amounts in vials of its flagship anemia drug.  Successfully defeated multiple motions to dismiss, motion for judgment on the pleadings, and motion for summary judgment.  Took numerous depositions.  Case settled just prior to trial, resulting in criminal fines and civil damages of more than $700 million.  See

Represented Bank of New York Mellon in lawsuits alleging that BNYM violated federal mail and wire fraud laws, state False Claims Acts, and fiduciary and contractual duties by overcharging custody customers for foreign-exchange services.  Successfully obtained dismissal of FCA claims in Virginia and California alleging billions of dollars in damages.  

Represented relator in federal False Claims Act involving failure to pay natural gas royalties to the United States.  Conducted numerous depositions.  Briefed and argued discovery and other motions.  Case resulted in settlements totaling more than $275 million by major natural gas manufacturers, including ExxonMobil, ChevronTexaco, and BP. 

Selected Publications and Speaking Engagements


Co-author:  Penalizing Tax Petitions:  Why the Erroneous Refund Penalty in Section 6676 Violates Taxpayers’ First Amendment Rights, The Tax Lawyer, Vol. 68, No. 3 (Spring 2015)

Note, Restructuring the Modern Treaty Power, 114 Harv. L. Rev. 2478 (2001)

Recent Case, Made in the USA Foundation v. United States, 113 Harv. L. Rev. 1234 (2000)

Speaking Engagements

Presenter, Fifth Circuit Bar Association Appellate Advocacy Seminar, “The Attorney’s Perspective on Briefs and Oral Argument:  Substantive Tips on Brief Writing and Oral Argument” (Oct. 2, 2017),

Panelist, Perrin Class Action Conference, “Supreme Court Update,” (May 31, 2017),

Panelist, American Conference Institute Class Action Conference, “The Use of Representative or Statistical Evidence to Substantiate Class Claims Post-Tyson Foods v. Bouaphakeo” (Apr. 3, 2017),

Panelist, Perrin Class Action Conference, “Supreme Court Update,” (May 17, 2016),

Panelist, Bridgeport CLE Conference, “Consumer Class Action Litigation” (January 8, 2016), 

Co-Chair, LSI Conference on “Class Actions and Alternatives for Resolving Aggregate Claims” (June 17-18, 2013),

Panelist, CLE International Conference, “Class Actions:  The U.S. Supreme Court Speaks” (Oct. 3-4, 2013)

Invited Guest Speaker, Georgetown University Law Center (2014, 2015), Harvard Law School (2014)

Panelist, Strafford CLE webinar on “Defeating Rule 23(b)(3)'s Predominance Requirement Using Defenses and Counterclaims” (Aug. 25, 2015), 


Harvard Law School, J.D., magna cum laude, 2001

  • Treasurer, Harvard Law Review, 2000-2001
  • Finalist, Ames Moot Court competition

Yale University, M.A., 1998

Harvard College, B.A., magna cum laude, 1996 

  • Phi Beta Kappa


Law Clerk, Justice David H. Souter, U.S. Supreme Court, 2002-2003

Law Clerk, Judge Michael Boudin, U.S. Court of Appeals, First Circuit, 2001-2002

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