Amendments to Bylaws (Form 8-K)

Item 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.

On January 22, 2026, the Board of Directors (the "Board") of First Northern Community Bancorp, a California corporation (the "Company," "we" or "us"), approved an amendment to the Amended and Restated Bylaws of the Company (the "Bylaws"), effective January 22, 2026, pertaining to the qualification of directors who serve on the Board of Directors of the Corporation. This amendment revised Section 22 of the Bylaws to permit an exception for a director of the Company to serve as a director, officer, employee, agent, nominee, or attorney of a finance company, if approved by the affirmative vote of at least two-thirds (2/3's) of the members of the Board of Directors of the Company.

The foregoing is a summary of the amendment to the Bylaws, and does not purport to be complete and is subject to, and qualified in its entirety by, the full text of the Bylaws, as so amended, a copy of which is attached hereto as Exhibit 3.1 to this Current Report on Form 8-K.