Jeff Hammel is Co-Chair of Latham & Watkins' New York Litigation & Trial Department and previously served as Global Co-Chair of the firm's Securities and M&A Litigation Practice for 10 years. He regularly represents Fortune 500 and other public companies, financial institutions, and officers and directors in their highest-stakes litigation matters.

Jeff is “acknowledged as one of the most experienced practitioners in the market” according to Legal 500 US. He was named as a 2025 MVP for Securities by Law360 and has also been recognized repeatedly in The American Lawyer’s “Litigator of the Week” columns and other publications. He is co-author of a definitive treatise on securities litigation, Federal Securities Litigation, 3d Edition, 2015.  

Jeff has delivered complete defense victories to clients in dozens of securities class actions throughout the United States, including:

  • Quinones v. Frequency Therapeutics, Inc., 106 F.4th 177 (1st Cir. 2024) – Won affirmance of dismissal of securities fraud claims against company and senior executives for alleged failure to disclose adverse product testing results
  • In re MINISO Grp. Holding Ltd. Sec. Litig., 2024 WL 759246 (S.D.N.Y. 2024) – Won dismissal of Securities Act of 1933 claims against underwriters
  • United Ass’n Nat’l Pension Fund v. Carvana Co., 2024 WL 863709 (D. Ariz. 2024) – Won dismissal of Securities Exchange Act of 1934 and Securities Act of 1933 claims
  • Schertz v. Garcia, C.A. No. 2023-0600-KSJM (Del. Ch. 2024) (Transcript) – Won dismissal of all derivative claims, including Caremark and Brophy insider trading claims
  • IAM Nat’l Pension Fund v. Farfetch Ltd., 2023 WL 2879304 (2d Cir. 2023) – Won affirmance of district court’s dismissal of Securities Exchange Act of 1934 and Securities Act of 1933 claims
  • Salim v. Mobile Telesystems PJSC, 2022 WL 966903 (2d Cir. 2022) – Won affirmance of district court’s dismissal of securities fraud claims alleging misrepresentations concerning a DOJ investigation and related FCPA violations
  • City of Warwick Ret. Sys. v. Carvana Co., Case No. CV2022-013054 (Sup. Ct. Ariz., Maricopa Cnty. 2023) – Won dismissal with prejudice of Securities Act of 1933 claims
  • Luongo v. Desktop Metal, Inc., 2023 WL 6142715 (D. Mass. 2023) – Won dismissal of securities fraud claims concerning alleged noncompliance with FDA regulations
  • Plumbers & Pipefitters Local Union v. Citrix, Systems et al., 2021 Fla. Cir. LEXIS 302 (Cir. Ct. Palm Beach Cty. 2021) – Won dismissal of Securities Act of 1933 claims brought in Florida state court
  • Wasson v. LogMeIn, Inc., 2020 WL 5946813 (D. Mass. 2020), 2021 WL 108021 (D. Mass. 2021) – Won dismissal of securities fraud claims alleging failure to disclose post-acquisition business plans
  • In re Eaton Corp. Securities Litigation, 2017 WL 4217146 (S.D.N.Y. 2017), 318 F. Supp. 3d 659 (S.D.N.Y. 2018) – Won dismissals of two complaints alleging securities fraud claims against Eaton and its senior executives based on alleged non-disclosure of tax consequences of a corporate transaction
  • Friedman v. Endo Pharmaceuticals, 2018 WL 446189 (S.D.N.Y 2018), aff’d, 771 Fed. App’x (2d Cir. 2019) – Won dismissal of securities fraud claims against pharmaceutical manufacturer and its senior executives based on alleged omission of post-acquisition integration issues. Dismissal affirmed by Second Circuit
  • Fries v. Northern Oil & Gas, Inc., 2018 WL 388915 (S.D.N.Y. 2018) and 2018 WL 6493097 (S.D.N.Y. 2018) – Won dismissals of two complaints alleging securities fraud claims against oil company and its executives based on alleged stock manipulation and misuse of company assets
  • Graham v. Fearon et al., (N.D. Ohio 2017), 2017 WL 1113358 (N.D. Ohio 2017), aff'd, 2018 WL 315098 (6th Cir. 2018) – Won dismissal of all ERISA claims against alleged fiduciaries of Eaton Corp. employee stock plan
  • In re OmniVision, Inc. Shareholder Litigation, (Cal. Sup. Ct. Sept. 12, 2016) – Won dismissal of aiding and abetting breach of fiduciary duty claim against JP Morgan as financial advisor in an M&A transaction
  • Dingee v. Wayfair Inc., 2016 U.S. Dist. LEXIS 68322 (S.D.N.Y. 2016) – Won dismissal of securities fraud claims against company and senior executives based on alleged material misrepresentations regarding competitors
  • Callan v. Motricity, Inc., 649 Fed. Appx. 526 (9th Cir. 2016) – Won affirmance of dismissal of Securities Act of 1933 claims against underwriters, including JP Morgan, Goldman Sachs, and Deutsche Bank based on alleged misrepresentations in IPO registration statement
  • Dempsey v. Vieau, 2015 U.S. Dist. LEXIS 119245 (S.D.N.Y. 2015) – Won dismissal of securities fraud claims against executives of a technology company based on alleged failure to disclose product defects and customer sales issues
  • Dudley v. Haub, 2013 U.S. Dist. LEXIS 61386 (D.N.J. 2013) – Won dismissal of securities fraud claims against private equity firm and its chairman relating to bankruptcy of A&P supermarket chain
  • In re A123 Systems, Inc. Securities Litigation, 2013 WL 987830 (D. Mass. 2013) – Won dismissal of securities fraud claims against manufacturer of electric vehicle batteries following disclosure of high-profile product defect and costly product replacement campaign
  • In re Herald, Primeo & Thema Funds Securities Litigation, 2011 WL 5928952 (S.D.N.Y. 2011) – Won dismissal of all claims in Madoff-related litigation
  • In re Omnicom Group Inc. Securities Litigation, 597 F.3d 501 (2d Cir. 2010) – Won summary judgment on securities fraud claims, which was affirmed by the Second Circuit, establishing important “loss causation” precedent regarding the events affecting stock price that can support a claim for securities fraud
  • In re Fannie Mae 2008 Securities Litigation, 742 F. Supp. 2d 382 (S.D.N.Y. 2010) – Won dismissal of virtually all securities fraud claims against Fannie Mae following its placement into federal conservatorship during the financial crisis
  • In re Fannie Mae 2008 Securities Litigation, 2009 WL 4067259 (S.D.N.Y. 2009) – Won dismissal of Section 12(a)(2) and 15 claims against Fannie Mae, as well as against more than a dozen underwriters

Bar Qualification

  • New York

Education

  • JD, Columbia University School of Law, 1996
  • AB, Dartmouth College, 1991
Hammel, Jeff G.
November 17, 2025 Recognition

MVP: Latham’s Jeff Hammel

Partner Jeff Hammel, Co-Chair of the New York Litigation & Trial Department, was named a 2025 Law360 Securities MVP for achieving a remarkable feat by securing three consecutive victories in different courts for three different clients across various industries, all within a single day. 

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November 12, 2025 Recognition

12 Latham Partners Named 2025 MVPs

The most of any law firm, the honorees were recognized for their work on market-leading transactions and high-stakes litigation and trial victories.