TNC Investigation Alert: BFA Law Investigates Tennant Company After 23% Stock Drop Mar 18, 2026 1:17 PM Eastern Daylight Time TNC Investigation Alert: BFA Law Investigates Tennant Company After 23% Stock Drop Share BFA Law is investigating Tennant Company after its stock plummeted 23% due to issues with its ERP system, potentially violating federal securities laws. NEW YORK--(BUSINESS WIRE)--Leading securities law firm Bleichmar Fonti & Auld LLPannounces an investigation into Tennant Company (NYSE:TNC) for ...