PERPETUA RESOURCES CORP.

false 0001526243 A1 0001526243 2026-08-17 2026-08-17 iso4217:USD xbrli:shares iso4217:USD xbrli:shares 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): August 17, 2026 Perpetua Resources Corp. (Exact name of registrant as specified in its charter) British Columbia 001-39918 98-1040943 (State or other jurisdiction of incorporation) (Commission File Number) (I.R.S. Employer Identification No.) 702 W Idaho Street , Suite 200 Boise , Idaho 83702 (Address of principal executive offices) (Zip Code) Registrant’s telephone number, including area code: ( 208 ) 901-3060 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 Shares, without par value PPTA Nasdaq Capital Market Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company x 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 August 17, 2026, Perpetua Resources Corp. (the “ Company ”) published an updated investor presentation (the “ Presentation ”) that it plans to use for investor relations and other purposes. A copy of the Presentation can be found on the Company’s website at https://perpetuaresources.com/investors/ under the heading “Presentations.” The information contained in this Item 7.01 is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “ Exchange Act ”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, unless expressly incorporated by specific reference in such filing. 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 hereunto duly authorized. PERPETUA RESOURCES CORP. Dated: August 17, 2026 By: /s/ Mark Murchison Mark Murchison Chief Financial Officer