Executive Change

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 8-K Current Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 30, 2025 BARNWELL INDUSTRIES, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 1-5103 72-0496921 (State or other jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.) 1100 Alakea Street , Suite 500 Honolulu , Hawaii 96813 (Address of Principal Executive Offices) (Zip Code) ( 808 ) 531-8400 (Registrant’s Telephone Number, Including Area Code) Not Applicable (Former Name or Former Address, if Changed Since Last Report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ 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)) Securities registered pursuant to Section 12(b) of the Act: Title of each class   Trading Symbol(s)   Name of each exchange on which registered Common Stock, $0.50 Par Value Common Stock Purchase Rights   BRN N/A   NYSE American NYSE American Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Item 5.02   Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers On May 30, 2025, Ms. Heather Isidoro notified the Board of Directors (the “Board”) of Barnwell Industries, Inc. (the “Company”) that she resigned as a director of the Company, effective May 30, 2025. At the time of her resignation, Ms. Isidoro did not serve as a member of any committees of the Board. Ms. Isidoro’s resignation was made for personal reasons and not as a result of any disagreement with the Company on any matter relating to its operations, policies or practices. Item 9.01   Financial Statements and Exhibits . (d) Exhibits Exhibit No. Description     104 Cover Page Interactive Data File (embedded within the Inline XBRL document) SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Dated: June 2, 2025   BARNWELL INDUSTRIES, INC.   By: /s/ Alexander C. Kinzler     Name: Alexander C. Kinzler     Title: Secretary Exhibit Index Exhibit No. Description     104 Cover Page Interactive Data File (embedded within the Inline XBRL document)