Vitesse Energy, Inc.

Rule 10b5-1 Trading Arrangements

During the three months ended September 30, 2026, no director or officer of the Company adopted, modified orterminated any “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement” within the meaning of Item 408(a) of Regulation S-K.

2027 Annual Meeting of Stockholders Date

The Board of Directors has set the date for the Company’s 2027 Annual Meeting of Stockholders (“Annual Meeting”) to May 4, 2027. The exact time and place of the 2027 Annual Meeting will be specified in our Notice of 2027 Annual Meeting and related proxy statement for the 2027 Annual Meeting.

As the date of the 2027 Annual Meeting has changed by more than 30 days from the one-year anniversary of the 2026 Annual Meeting, we are informing stockholders of this change in accordance with Rule 14a-5(f) under the Exchange Act, and we are also informing stockholders of the new dates described below for submitting stockholder proposals and other matters.

Pursuant to Rule 14a-8 under the Exchange Act, any stockholder intending to present a proposal for inclusion in the proxy statement for the 2027 Annual Meeting must provide timely written notice of the proposal to the Secretary at 5619 DTC Parkway, Suite 700 Greenwood Village, CO 80111. To be timely, we must receive the proposal by December 18, 2026, for possible inclusion in the proxy statement, which we have determined to be a reasonable time before we expect to begin to print and send our proxy materials in accordance with Rule 14a-8(e).

Additionally, under our bylaws, any stockholder of record intending to nominate a candidate for election to the Board of Directors or to propose any business at the 2027 Annual Meeting must give timely written notice to the Secretary at 5619 DTC Parkway, Suite 700 Greenwood Village, CO 80111. To be timely, notice of such proposals and nominations must be submitted not less than 160 days (November 25, 2026) nor more than 190 calendar days (October 26, 2026) prior to the annual meeting. Furthermore, any stockholder who intends to use proxy access to nominate a candidate for election to the Board for inclusion in our 2027 proxy statement must satisfy the requirements set forth in our bylaws and must provide notice to the Secretary at 5619 DTC Parkway,

Suite 700 Greenwood Village, CO 80111 not less than 160 days (November 25, 2026) nor more than 190 calendar days (October 26, 2026) prior to the annual meeting.

Any stockholder who intends to solicit proxies in support of any director nominees must comply with the content requirements of SEC Rule 14a-19 (the SEC’s universal proxy rule) at the time it complies with the earlier deadlines in the advance notice provisions of the Bylaws. Thus, if a stockholder intends to solicit proxies in support of any director nominees submitted under the advance notice provisions of the Bylaws for the Company’s 2027 Annual Meeting, then such stockholder must also provide proper written notice that sets forth all the information required by SEC Rule 14a-19 to the Secretary of the Company at the principal office of the Company not less than 160 days (November 25, 2026) nor more than 190 calendar days (October 26, 2026) prior to the annual meeting.