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ProfessionalsJaren Janghorbani

Jaren Janghorbani
Partner

Tel: +1-212-373-3211
Fax: +1-212-492-0211
jjanghorbani@paulweiss.com

+1-212-373-3211
New York

1285 Avenue of the Americas
New York, NY 10019-6064
Fax: +1-212-492-0211

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A partner in the Litigation Department, co-chair of the M&A Litigation Practice Group, and a member of the firm’s Management Committee, Jaren Janghorbani is a nationally recognized trial lawyer and litigation strategist. Jaren’s practice is concentrated on complex commercial litigation, with a specialized focus on M&A and governance-related disputes, high-stakes shareholder litigation, and significant large-scale torts, including environmental disputes. She has successfully tried multiple multibillion-dollar cases and favorably resolved numerous others, representing a diverse range of clients including global public companies, boards of directors and special board committees, senior executives, and private equity firms and their portfolio companies across the industrials, energy, technology, media & entertainment and pharmaceuticals sectors.

Jaren is widely recognized for her exceptional trial and litigation achievements, with clients praising her for having “an amazing understanding of the law, tactical strategy, and trial lawyering skills.” She was recognized in Crain’s New York Business’ 2025 “Notable Litigators & Trial Attorneys” guide, named a finalist for “Litigator of the Year” in Euromoney’s 2024 Women in Business Law Americas Awards, and has received multiple recognitions from The American Lawyer for major trial and litigation victories for Channel Medsystems, QAD and Nuance Communications in high-stakes M&A litigations, and Atos Syntel in a long-running trade secrets dispute.

EXPERIENCE

Jaren advises clients on complex mergers and acquisitions and corporate governance disputes, including high-stakes shareholder class actions challenging multibillion-dollar transactions, material adverse event litigations, and corporate control disputes in the Delaware Court of Chancery and federal and state courts nationwide. She has also successfully counseled numerous public company boards of directors and special committees through various transaction-related disputes. Jaren’s experience includes representing:

  • The former independent directors of CBS Corp. in successfully resolving multiple multibillion-dollar securities class and derivative actions in the Delaware Court of Chancery arising from the stock-for-stock merger of CBS and Viacom.
  • Advance and certain of its officers and directors in securing the dismissal, with prejudice, affirmed by the Second Circuit, of a putative securities class action arising out of the $150 billion merger between AT&T’s WarnerMedia and Discovery, Inc., to form Warner Bros. Discovery; and in successfully resolving a related breach of fiduciary duty stockholder class action in the Delaware Court of Chancery concerning the merger.
  • The former members of the special committee of Pattern Energy in the successful resolution of two shareholder class actions in the Delaware Court of Chancery and Delaware federal court asserting breach of fiduciary duty claims related to Pattern Energy’s $6.1 billion merger with CPPIB.
  • The former special committee members of Cornerstone Building Brands in the successful settlement of shareholder litigation in the Delaware Court of Chancery challenging the fairness and sufficiency of disclosures relating to a take-private transaction, in which Cornerstone’s majority shareholder, Clayton, Dubliner & Rice, acquired the remaining outstanding shares of Cornerstone.
  • Nuance Communications, a multinational computer software technology corporation, in securing the dismissal of a merger disclosure lawsuit and related motion for attorneys’ fees—a vanishingly rare outcome—brought in connection with Microsoft’s $19.7 billion acquisition of the company.
  • The special committee and additional independent directors of Expedia Group in successfully resolving a multi-year litigation and internal investigation of claims in a shareholder derivative breach of fiduciary duty class action in the Delaware Court of Chancery related to Expedia’s $2.6 billion acquisition of Liberty Expedia Holdings.
  • The special committee of QAD Inc. in defeating a stockholder’s preliminary injunction motion in the Delaware Court of Chancery seeking to block a shareholder vote on QAD’s $2 billion merger with Thoma Bravo, allowing for the transaction to proceed to a shareholder vote; and in the global settlement of related shareholder litigation.
  • Symbiont.io, Inc., a blockchain-powered “smart securities” start-up, in winning a more than $140 million trial verdict in the Delaware Court of Chancery in a suit brought against Ipreo Holdings and IHS Markit concerning a joint venture intended to leverage blockchain technology in the syndicated loan market.
  • Channel Medsystems, Inc., a medical device start-up, in a trial victory in the Delaware Court of Chancery in connection with a “material adverse change” litigation with Boston Scientific Corporation in which Boston Scientific unsuccessfully sought to terminate its $250 million acquisition of the company.
  • The special committee of Pilgrim’s Pride Corporation in the successful defense of shareholder breach of fiduciary duty derivative litigation in the Delaware Court of Chancery related to Pilgrim Pride’s $1.3 billion acquisition of Moy Park from JBS SA.
  • Alere, Inc., a medical device and point-of-care testing company, in material adverse change litigation with Abbott Laboratories resulting in Abbott agreeing to close its $5.3 billion acquisition of Alere following expedited proceedings in the Delaware Court of Chancery.
  • Moelis & Company LLC, Archer Aviation Inc. and various related entities, directors and officers in a class action pending in the Delaware Court of Chancery related to the de-SPAC merger between Moelis and Archer.
  • Numerous additional public companies, portfolio companies and senior executives, including Paine Schwartz Partners, Fireman Capital Partners, Momentive Performance Materials, Atos SE, Reby, 1-800-Flowers and The Medicines Company, among others, in complex shareholder litigation and other M&A-related concerns.

Jaren regularly represents clients in a variety of complex commercial disputes, large-scale torts and environmental liability litigations, trade secrets actions, and securities fraud litigations. Among others, she has represented:

  • Solvay Specialty Polymers USA in a constellation of state and federal court litigations involving claims for personal injury, medical monitoring, biomonitoring and natural resource damages related to PFAS chemicals, including as trial counsel in securing a landmark $394 million settlement of an environmental liability lawsuit brought by the New Jersey Department of Environmental Protection (NJDEP), the commissioner of the NJDEP and the administrator of the New Jersey Spill Compensation Fund.
  • JM Eagle, the world’s largest plastic pipe manufacturer, as trial counsel in federal False Claims Act litigation brought on behalf of dozens of state and local water districts asserting $1 billion in potential damages in connection with the sale of its PVC pipe. At the conclusion of the first damages trial on behalf of five exemplar water districts, a federal district judge limited the plaintiffs’ recovery claims from $58 million to, at most, $1.2 to $2.1 million and declared a mistrial when jurors were unable to agree that the plaintiffs suffered any damages stemming from an earlier liability finding against JM Eagle.
  • Atos SE in several high-value commercial disputes, including in the successful settlement and dismissal, with prejudice, of a lawsuit brought by Unisys Corp. alleging misappropriation of trade secrets.
  • ExxonMobil in an eight-month bench trial where the State of New Jersey sought a precedent-setting $9 billion in damages for environmental injuries, making it one of the largest environmental damage cases ever tried. The case settled for $225 million while awaiting verdict.
  • Citigroup in defense of claims brought in New Jersey state court arising out of the collapse of Parmalat, defeating claims worth more than $10 billion and achieving a $364 million counterclaim jury verdict for Citigroup—among the largest defense-side verdicts in the history of New Jersey.
  • Merck in class action and other related litigation related to Vioxx.
  • A major global corporation in counseling on cases nationwide relating to consumer benzene exposure.

Jaren also has extensive experience with dispositive motion and appellate practice, in various state and federal jurisdictions including the United States Supreme Court. She was a key member of the Paul, Weiss litigation team representing Edie Windsor, pro bono, through all of the stages in the successful challenge to the federal Defense of Marriage Act (DOMA) that resulted in a victory when the Supreme Court struck down DOMA as unconstitutional in United States v. Windsor. Jaren maintains an active pro bono practice, which includes the representation of an individual incarcerated on Alabama’s death row, among other criminal habeas petitions.

Jaren was a Hamilton Fellow and Kent Scholar at Columbia Law School, where she was also Essay and Review editor for the Columbia Law Review. Following her clerkships, she did a semester-long post-doctoral fellowship at Columbia Law School, focusing on federal jurisdiction and sentencing issues.

AWARDS AND RECOGNITIONS

Jaren has received numerous industry awards and recognitions. The American Lawyer named her “Litigator of the Week” following a resounding trial win in Delaware on behalf of Channel Medsystem in its litigation to enforce a merger agreement, and has recognized her on multiple occasions in its “Litigation Daily” column for significant victories on behalf of QAD, Nuance Communications and Atos Syntel. She was recognized by Crain's New York Business in its 2025 “Notable Litigators & Trial Attorneys,” by Euromoney's 2024 Women in Business Law Americas Awards as a “Litigator of the Year” finalist, and by The National Law Journal's 2022 Legal Awards as a finalist in the “Winning Litigators” category. Jaren was featured by Lawdragon in its “Lawyer Limelight” series in 2024 and is recognized on both its 2025 “500 Leading Lawyers in America” and “500 Leading Litigators in America” guides, the latter of which she has been named to since its inception. She is also recognized by Chambers USA and The Legal 500 US for her work in general commercial litigation and M&A litigation. She was previously named a 2017 “Rising Star” by the New York Law Journal.

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