Spero Therapeutics Prevails in Investor Lawsuit Over Drug Approval Disclosures

• Spero Therapeutics successfully defended against a proposed investor class action alleging the company concealed information regarding the regulatory approval prospects of one of its drugs.
• The court ruled that Spero's communications with the FDA did not suggest the company should have anticipated the rejection of its drug application.
• The lawsuit centered on claims that Spero misled investors about the likelihood of securing FDA approval, leading to financial losses when the application was denied.

Spero Therapeutics Inc. has won a legal battle against a proposed investor class action accusing the biopharmaceutical company of withholding crucial information about the likely rejection of one of its drugs by regulatory authorities. The court determined that Spero's interactions with the U.S. Food and Drug Administration (FDA) did not provide sufficient grounds to suggest the company should have foreseen the application's denial.

The lawsuit, filed on behalf of investors, alleged that Spero Therapeutics misled the market by not disclosing warning signs that its drug application would be rejected. Investors claimed they suffered financial losses as a result of the company's alleged concealment of information.

The court's decision hinged on the assessment of Spero's communications with the FDA. The ruling indicated that these interactions did not definitively signal an impending rejection, thereby undermining the plaintiffs' argument that Spero knowingly misrepresented the drug's approval prospects.

This outcome provides a measure of relief for Spero Therapeutics, allowing the company to focus on its research and development efforts without the burden of ongoing litigation related to disclosure practices.