System Conversion Beginning Friday, June 5, 2026

As part of our continued investment in technology and service improvements we will be completing a system conversion beginning after the close of business on Friday, June 5, 2026. The conversion will be completed by Monday, June 8, 2026.

To help make this transition as smooth as possible we have provided important details below about what you can expect from the close of business on Friday, June 5, 2026, through Sunday, June 7, 2026, and how the conversion may affect products and services.

• Debit/ATM Cards: Your existing giantbank.com, a division of Centennial Bank MasterCard® Debit Card will remain in service. In addition, your existing PIN will not change. Debit card purchases and ATM transactions conducted during the conversion weekend may be subject to delayed posting. Once nightly processing is completed, these transactions will be applied against your account and will impact your balance. Customers should maintain sufficient funds to cover all transactions conducted during this period.

• Mobile Banking (Mobile App, Text Banking, Mobile Web Browser): Mobile banking, including Billpay and Zelle, will be unavailable from the close of business on Friday, June 5, 2026, through Sunday, June 7, 2026. Mobile banking services will resume on Monday, June 8, 2026.

• ATM: ATM service may be intermittently unavailable from the close of business on Friday, June 5, 2026, through Sunday, June 7, 2026.

• Interactive Teller Machine (ITM): ITM operations will be unavailable from the close of business on Friday, June 5, 2026, through Sunday, June 7, 2026.

• Online Banking Channels: Please note Online Banking Channels, including Billpay and Zelle, will be unavailable from the close of business on Friday, June 5, 2026, through Sunday, June 7, 2026. On Monday, June 8, 2026, you will be able to sign into giantbank.com’s online banking system by logging into www.giantbank.com using your current User ID and Password.

• Statements: Due to the system conversion, all checking, money market, and savings accounts will have an unscheduled statement generated on Friday, June 5, 2026. This unscheduled statement drop includes any applicable interest paid through Sunday, June 7, 2026. Your monthly service charge will be waived on this unscheduled statement. Your next statement will be rendered on your regular scheduled date. For Business Analysis account holders, the May analysis charge will be applied on Friday, June 5, 2026. If you currently receive E-Statements, you will continue to receive future statements along with notices electronically via Online Banking at www.giantbank.com under the Documents Link.

• Telephone Banking: Telephone banking will be unavailable from the close of business on Friday, June 5, 2026, through Sunday, June 7, 2026. Telephone Banking services will resume on Monday, June 8, 2026. Again, please review the provided information carefully and feel free to contact us with any questions or concerns by calling our Customer Care Center at 877-446-4200, or online at www.giantbank.com.

• Online Account Opening: Online account opening will be unavailable beginning at 4:00 pm CT / 5:00 pm ET Friday, June 5^th. Service will resume at 8:00 am CT / 9:00 am ET Monday, June 8, 2026.

Thank you for your loyalty. We look forward to building a lasting relationship and providing you with all your future banking needs.