Reg FD Disclosure

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): May 27, 2021 PERMIAN BASIN ROYALTY TRUST (Exact name of Registrant as specified in its charter) Texas 1-8033 75-6280532 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) Royalty Trust Management Simmons Bank 2911 Turtle Creek Boulevard Suite 850 Dallas, Texas 75219 (Address of principal executive offices) (Zip Code) Registrant’s Telephone Number, including area code: (855) 588-7839 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 (see General Instruction A.2.): ☐ 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 Units of Beneficial Interest PBT New York Stock Exchange 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 7.01. Regulation FD Disclosure. On May 27, 2021, the Registrant published the Registrant’s full reserve report as of December 31, 2020 prepared by Cawley, Gillepsie & Associates, Inc., a summary of which was filed as an exhibit to the Registrant’s Form 10-K for the year ended December 31, 2020. The reserve report is attached hereto as Exhibit 99.1 and is incorporated herein by reference. This Report on Form 8-K is being furnished pursuant to Item 7.01, Regulation FD Disclosure. The information furnished is not deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, is not subject to the liabilities of that section and is not deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. Item 9.01. Financial Statements and Exhibits. (d) Exhibits 23.1 Consent of Cawley, Gillespie & Associates, Inc. 99.1 Report of Cawley, Gillespie & Associates, Inc. SIGNATURES 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 thereunto duly authorized. PERMIAN BASIN ROYALTY TRUST By: SIMMONS BANK, TRUSTEE FOR PERMIAN BASIN ROYALTY TRUST By: /s/ RON E. HOOPER Ron E. Hooper Senior Vice President Date: June 1, 2021