SECURITIES AND EXCHANGE COMMISSION

| Nevada | 0-15950 | 37-1078406 | ||||||
| (State of Incorporation) | (Commission File Number) | (I.R.S. Employer Identification No.) | ||||||
11440 Tomahawk Creek Parkway Leawood, Kansas 66211 | ||||||||
| (Address of Principal Executive Offices) | ||||||||
(217) 365-4544 | ||||||||
| (Registrant’s telephone number, including area code) | ||||||||
| N/A | ||||||||
| (Former name or former address, if changed since last report.) | ||||||||
| ☐ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) | ||||
| ☐ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) | ||||
| ☐ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) | ||||
| ☐ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) | ||||
| Title of each class | Trading Symbol(s) | Name of each exchange on which registered | ||||||||||||
| Common Stock, $0.001 par value | BUSE | Nasdaq Stock Market LLC | ||||||||||||
Depositary Shares, each representing a 1/40th interest in a share of 8.25% Fixed-Rate Series B Non-Cumulative Perpetual Preferred Stock, $0.001 par value | BUSEP | Nasdaq Stock Market LLC | ||||||||||||
Exhibit Number | Description of Exhibit | |||||||
| 99.1 | ||||||||
| 99.2 | ||||||||
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document and included in Exhibit 101) | |||||||
FIRST BUSEY CORPORATION | |||||||||||||||||
| Date: | April 28, 2026 | By: | /s/ CHRISTOPHER H.M. CHAN | ||||||||||||||
| Christopher H.M. Chan | |||||||||||||||||
| Executive Vice President, Chief Financial Officer | |||||||||||||||||