JKHY ▼ -0.7% - Jack Henry & Associates, Inc. $JKHY JKHY - Celtic Bank Selects Jack Henry to Support Business Banking and Fintech Tech Stack Jack Henry & Associates fell 0.7% today despite announcing that Celtic Bank has selected the company to support its business banking and fintech technology stack, a deal that typically signals revenue expansion through new client implementations. 08-SEP-2026 08:31 AM ET