Alex Spiro Files Defamation Lawsuit Against Short Seller for Tecnoglass

On September 10, 2025, attorney Alex Spiro unveiled a defamation lawsuit in the Federal District Court for the Southern District of New York, representing Tecnoglass Inc. (NYSE: TGLS) along with its co-founders and executives, José and Christian Daes. The lawsuit targets Christian Lamarco, a prominent short seller, and his firm Shadyside Partners, LLC, which operates under the trading name Culper Research. The claims involve the malicious dissemination of false information that inaccurately associates Tecnoglass and its executives with the infamous Sinaloa drug cartel.

The lawsuit outlines that Lamarco's company profited from short selling by falsely alleging harmful associations based on purported intelligence documents that the Mexican government has confirmed to be fraudulent. This incident is not unprecedented for Lamarco and Culper Research, as they have faced similar lawsuits for defamation in the past.

The allegations made in this damaging report had an immediate adverse effect on Tecnoglass's stock value and tarnished the company's reputation significantly. The plaintiffs are seeking compensation for damages incurred, reimbursement of legal fees, and a court order demanding the retraction and correction of these defamatory statements.

This case is officially titled Tecnoglass Inc. v. Lamarco, under case number 25-cv-7450 in the United States District Court for the Southern District of New York.

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For anyone interested in the details of this ongoing legal battle, the courtroom proceedings are expected to unfold further in the coming months, shedding light on the ramifications of the accusations made against Tecnoglass.