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ALEX SPIRO FILES DEFAMATION SUIT AGAINST SHORT SELLER ON BEHALF OF TECNOGLASS
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Quinn Emanuel Urquhart & Sullivan, LLP

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Quinn Emanuel Urquhart & Sullivan, LLP

10 Sep, 2025, 18:46 IST

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NEW YORK, Sept. 10, 2025 /PRNewswire/ -- Alex Spiro announced that yesterday he has filed a federal defamation lawsuit in the Southern District of New York on behalf of Tecnoglass Inc. (NYSE: TGLS) and its co-founders and executives, José and Christian Daes. The complaint names short seller Christian Lamarco and his firm Shadyside Partners, LLC (d/b/a Culper Research), alleging they deliberately published false claims linking Tecnoglass and its executives to the Sinaloa cartel.

The filing asserts that Culper Research profited from short positions by spreading fabricated allegations sourced from purported "intelligence" documents that the Mexican government has publicly confirmed are inauthentic.

The complaint also notes this is not the first time Lamarco and Culper Research have faced defamation suits of this nature. The report caused immediate damage to Tecnoglass's share price and reputation. The plaintiffs seek damages, attorneys' fees, and an injunction requiring the removal and retraction of the defamatory statements.

The case is Tecnoglass Inc. v Lamarco, 25-cv-7450, U.S. District Court, Southern District of New York.

About Quinn Emanuel
Quinn Emanuel Urquhart & Sullivan, LLP is a 1000+ lawyer business litigation firm—the largest in the world devoted solely to business litigation and arbitration with 34 global office locations. Surveys of major companies around the world have named it the "most feared" law firm in the world three times. Firm lawyers have tried over 2,500 cases, winning 86% of them. When representing defendants, Quinn Emanuel's trial experience gets better settlements or defense verdicts. When representing plaintiffs, Quinn Emanuel lawyers have won nearly $80 billion in judgments and settlements. Quinn Emanuel has also obtained seven nine-figure jury verdicts, four 10-figure jury verdicts, 51 nine-figure settlements, and 20 10-figure settlements. 

Quinn Emanuel has been named the No. 1 "most feared" law firm by The BTI Consulting Group three times in its annual "Most Feared Law Firms in Litigation" guide, in which in-house counsel named 46 firms they "want to steer clear of" when it comes to litigation. The American Lawyer named Quinn Emanuel the top IP litigation firm in the U.S. and the firm as one of the top six commercial litigation firms in the country. The UK legal periodical, The Lawyer named us "International Firm of the Year." Law360 has most recently selected us as having Banking, Class Action, International Arbitration, and Trials "Practice Groups of the Year." Managing IP twice recognized us as having the "Best ITC Litigation Practice" and honored us with the "Patent Contentious West" award. Legal Business has named us "US Law Firm of the Year" three times, and our German offices have twice been named both "IP Litigation Firm of the Year" and "Patent Litigation Firm of the Year" by JUVE, Germany's most prestigious legal publication. Global Investigations Review, a leading legal periodical covering global white-collar investigations, named us the "Most Impressive Investigations Practice of the Year." Global Arbitration Review named us the 3rd best arbitration practice in the world. Global Competition Review named our antitrust and competition practice among the "25 Global Elite," and has included us in their list of the world's top 10 competition litigation practices. 

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