Company Update

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C.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) June 10, 2019 PrimeEnergy Resources Corporation (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 0-7406 11-2695037 (Commission File Number) (IRS Employer Identification No.) 9821 Katy Freeway, Houston, Texas 77024 (Address of principal executive offices) Registrant’s telephone number, including area code 713-735-0000 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 (see General Instruction A.2. below): ☐ 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, par value $.10 per share PNRG NASDAQ 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. ☐ PRIMEENERGY RESOURCES CORPORATION Section 8—Other Events Item 8.01—Other Events On June 10, 2019, PrimeEnergy Resources Corporation (the “Company”) issued the news release that is attached hereto as Exhibit 99.1. In the news release, the Company announced it is set to join the broad-market Russell 3000 ® Index at the conclusion of the 2019 Russell indexes annual reconstitution, effective after the US market opens on July 1, according to a preliminary list of additions posted by FTSE Russell June 7, 2019. Item 9.01—Financial Statements and Exhibits (d) Exhibits Exhibit Number Description 99.1 News Release, dated June 10, 2019, titled PrimeEnergy Resources Corporation set to join Russell 3000 ® Index SIGNATURES Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, the registrant has duly caused this current report to be signed on its behalf by the undersigned, thereto duly authorized. Dated: June 10, 2019 PrimeEnergy Resources Corporation By : /s/ Beverly A. Cummings Name: Beverly A. Cummings Executive Vice President