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Nathaniel C. Giddings


Nathaniel’s practice focuses on antitrust, consumer protection, financial services, and e-discovery. Nathaniel has litigated cases from inception through trial and appeal, and his work has contributed to the recovery of billions of dollars in compensation for the firm’s clients. Nathaniel is particularly well-versed in e-discovery issues and is an active member of The Sedona Conference’s Working Group on Electronic Document Retention and Production.


Nathaniel’s clients include businesses alleging antitrust violations in the financial, pharmaceutical, and agricultural markets; consumers alleging state and constitutional law violations by a private toll road operator; recording artists alleging underpayment of music royalties by their record labels; and local governments challenging the constitutionality of a federal law. Nathaniel has also defended corporate officers in commercial disputes.

Practice Areas

Antitrust / Competition

  • In re Contact Lens Antitrust Litigation – Nathaniel currently represents classes of consumers who purchased certain disposable contact lenses. The classes allege that the four leading contact lens manufacturers conspired among themselves and others to adopt, implement, and enforce resale price maintenance policies, which they called “Unilateral Pricing Policies” or “UPPs,” on these contact lenses.
  • In re Foreign Exchange Benchmarks Rates Antitrust Litigation – Nathaniel represents market participants in the foreign exchange market against international banks alleged to have fixed the price of foreign exchange instruments.
  • In re Libor-Based Financial Instruments Antitrust Litigation – Nathaniel currently represents a class of “over-the-counter” purchasers of certain financial instruments linked to LIBOR. The plaintiffs allege that the banks setting this rate conspired with one another to suppress the LIBOR during the global financial crisis, which resulted in the purchasers receiving less money on their investments than they would have absent the conspiracy.
  • In re Cedar Shake & Shingle Antitrust Litigation – Nathaniel currently represents a putative class of direct purchasers of certain cedar shakes and shingles. The plaintiff alleges that the manufacturers conspired with one another and their trade association to artificially inflate the price of cedar shakes and shingles.

Financial Services and Securities

  • MTB Investment Partners, LP v. Siemens Hearing Instruments, Inc. – Nathaniel represented sellers of HearUSA stock who alleged that the defendant artificially depressed the price of the stock in order to acquire the company at below market price.

Deceptive Business Practices and Consumer Protection

  • Brown v. Transurban USA, Inc. – Nathaniel represented users of high-occupancy tolls lanes (so-called “HOT lanes”) in Virginia that were assessed significant fines without being provided with adequate notice from the private toll road operator


  • Nathaniel is a member of The Sedona Conference, Working Group 1 (Electronic Document Retention and Production)

What Others Say

  • The American Antitrust Institute honored Nathaniel with its award for "Outstanding Antitrust Litigation Achievement by a Young Lawyer," for his innovative contributions to the In re Disposable Contact Lens Antitrust Litigation case, in which Hausfeld serves as co-lead counsel.
  • Nathaniel has been recognized by DC Super Lawyers as a “Rising Star” in Antitrust Litigation in since 2014.


The George Washington University Law School, J.D., 2011

Michigan State University, James Madison College of Public Affairs, B.A., Political Theory and Constitutional Democracy, 2008

Bar Admissions

District of Columbia

U.S.D.C., District of Columbia


U.S.D.C., Northern District of Illinois

U.S.C.A., Second Circuit

U.S.C.A., Sixth Circuit

U.S.C.A., Ninth Circuit

Affiliations & Memberships

The Sedona Conference, Working Group 1 (Electronic Document Retention and Production)

American Bar Association

 - Section of Antitrust Law

 - Young Lawyers Division

Young Lawyer Representative, Books and Treatises Committee of the ABA Section of Antitrust Law (2016-2017)

Senior Production Editor, George Washington Journal of Energy and Environmental Law (2010- 2011)


Drafting Team Member, The Sedona Conference Commentary on Rule 45 Subpoenas to Non-Parties, Second Edition (Oct. 2020)

Jeannine Kenney, Nathaniel C. Giddings, and Theodore DiSalvo, Hindsight Proportionality is an Illogical and Meaningless Idea, Law 360 (July 23, 2019)

Nathaniel C. Giddings & Aaron Patton, Social Media and Antitrust: A Discovery Primer, Antitrust Magazine (Summer 2018)

Nathaniel C. Giddings, Note, Go Offshore Young Man! The Categorical Exclusion Solution to Offshore Wind Farm Development on the Outer Continental Shelf, 2 Geo. Wash. J. Energy & Envtl. L. 75 (2011)

Nathaniel C. Giddings & Laurie Ristino, Proposal: A Uniform Act for Wind Rights, 8 A.B.A. Sec. Env’t Energy & Resources News (2011)

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