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EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 33-30095 of our report dated June 29, 2026, appearing in this Annual Report on Form 11-K of the First Busey Corporation Profit Sharing Plan and Trust for the year ended December 31, 2025.

/s/ FGMK, LLC

Bannockburn, Illinois

June 29, 2026