Nasdaq-listed ALT5 Sigma is facing renewed scrutiny after a report found that the company’s newly appointed auditor is currently barred from performing audits due to an expired license. Key Takeaways: ALT5 Sigma appointed a new auditor that is currently barred from performing audits due to an expired firm license. The auditor’s licensing issue adds to ALT5 Sigma’s compliance problems after missing its Q3 filing deadline. Regulators have previously fined the auditing firm for repeated reporting and fi ...