Results of Operations and Financial Condition. On July 29, 2026, First US Bancshares, Inc. issued a press release announcing financial results for the quarter ended June 30, 2026. The press release is attached as Exhibit 99.1 to this Form 8-K and is furnished to, but not filed with, the Commission.

Results of Operations and Financial Condition. On April 29, 2026, First US Bancshares, Inc. issued a press release announcing financial results for the quarter ended March 31, 2026. The press release is attached as Exhibit 99.1 to this Form 8-K and is furnished to, but not filed with, the Commission.

The filing describes the establishment of a new cash incentive program for executive officers and key employees.

Results of Operations and Financial Condition. On January 28, 2026, First US Bancshares, Inc. issued a press release announcing financial results for the quarter ended December 31, 2025. The press release is attached as Exhibit 99.1 to this Form 8-K and is furnished to, but not filed with, the Commission.

Results of Operations and Financial Condition. On October 29, 2025, First US Bancshares, Inc. issued a press release announcing financial results for the quarter ended September 30, 2025. The press release is attached as Exhibit 99.1 to this Form 8-K and is furnished to, but not filed with, the Commission.

Results of Operations and Financial Condition. On July 30, 2025, First US Bancshares, Inc. issued a press release announcing financial results for the quarter ended June 30, 2025. The press release is attached as Exhibit 99.1 to this Form 8-K and is furnished to, but not filed with, the Commission.

Principal Accounting Officer — Matthew A. Parker: Matthew A. Parker was promoted to Principal Accounting Officer.

Results of Operations and Financial Condition. On April 30, 2025, First US Bancshares, Inc. issued a press release announcing financial results for the quarter ended March 31, 2025. The press release is attached as Exhibit 99.1 to this Form 8-K and is furnished to, but not filed with, the Commission.

The filing describes the establishment of a new cash incentive program for executive officers and key employees.

Director — Mr. John C. Gordon: Mr. Gordon resigned from the Board of Directors after many years of service.

Results of Operations and Financial Condition. On January 27, 2025, First US Bancshares, Inc. issued a press release announcing financial results for the quarter ended December 31, 2024. The press release is attached as Exhibit 99.1 to this Form 8-K and is furnished to, but not filed with, the Commission.

Results of Operations and Financial Condition. On October 24, 2024, First US Bancshares, Inc. issued a press release announcing financial results for the quarter ended September 30, 2024. The press release is attached as Exhibit 99.1 to this Form 8-K and is furnished to, but not filed with, the Commission.

Results of Operations and Financial Condition. On July 24, 2024, First US Bancshares, Inc. issued a press release announcing financial results for the quarter ended June 30, 2024. The press release is attached as Exhibit 99.1 to this Form 8-K and is furnished to, but not filed with, the Commission.

Entry into a Material Definitive Agreement. The information set forth in Item 5.02(d)(5) of this Current Report on Form 8-K with respect to the Director Indemnification Agreement, dated as of July 24, 2024 (the “Indemnification Agreement”), by and between First US Bancshares, Inc. (the “Company”) and Robert C. Field, is incorporated by reference into this

Director — Robert C. Field: Election of Robert C. Field to the Board of Directors and appointment to committees.

Director — Ms. Sheri S. Cook: Ms. Sheri S. Cook resigned as a director of the Company effective April 26, 2024.

Results of Operations and Financial Condition. On April 24, 2024, First US Bancshares, Inc. issued a press release announcing financial results for the quarter ended March 31, 2024. The press release is attached as Exhibit 99.1 to this Form 8-K and is furnished to, but not filed with, the Commission.

The filing describes the establishment of a new cash incentive program for executive officers and key employees.

Results of Operations and Financial Condition. On January 25, 2024, First US Bancshares, Inc. issued a press release announcing financial results for the quarter ended December 31, 2023. The press release is attached as Exhibit 99.1 to this Form 8-K and is furnished to, but not filed with, the Commission.

Other Events. On December 26, 2023, First US Bancshares, Inc. (the “Company”) repurchased 137,500 shares of its common stock, par value $0.01 per share, in a privately negotiated transaction for an aggregate purchase price of $1,421,750. The repurchase was made under the Company’s previously announced stock repurchase program pursuant to which 459,313 shares of common stock may yet be repurchased.

Results of Operations and Financial Condition. On October 25, 2023, First US Bancshares, Inc. issued a press release announcing financial results for the quarter ended September 30, 2023. The press release is attached as Exhibit 99.1 to this Form 8-K and is furnished to, but not filed with, the Commission.

Results of Operations and Financial Condition. On July 26, 2023, First US Bancshares, Inc. issued a press release announcing financial results for the quarter ended June 30, 2023. The press release is attached as Exhibit 99.1 to this Form 8-K and is furnished to, but not filed with, the Commission.

The filing describes the approval of a new incentive plan by shareholders, which is not related to any management change.

Results of Operations and Financial Condition. On April 26, 2023, First US Bancshares, Inc. issued a press release announcing financial results for the quarter ended March 31, 2023. The press release is attached as Exhibit 99.1 to this Form 8-K and is furnished to, but not filed with, the Commission.