Investor David Herro Defends Eurofins From Muddy Waters Attack

David Herro, a top investor in Eurofins Scientific SE, defended the lab-testing company from allegations of malfeasance by Carson Block’s Muddy Waters Research, saying that the short seller failed to offer a compelling argument.

Muddy Waters didn’t list any specific instances of wrongdoing and some of its claims wring “extremely hollow” given that Eurofins founder and Chief Executive Officer Gilles Martin owns about a third of the Luxembourg-based company, according to Herro, a portfolio manager at Harris Associates LP.

Eurofins offers testing services to the food, pharma and cosmetics industries, among others. Chicago-based Harris Associates is the third-largest ...