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)

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): October 2, 2023

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.)

405 S. 8th Street, Ste. 201

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 8.01 Other Events.

Perpetua Resources Corp. (“Perpetua”) reported today that following the 45-day review period, the U.S. District Court for the District of Idaho approved the

Stipulation for Dismissal and Agreement (the “Agreement”) on October 2, 2023 which resulted in the Clean Water Act lawsuit being dismissed without

prejudice. Under the Agreement, a dismissal with full prejudice will follow after completion of Perpetua’s required payments thereunder.

Cautionary Statement

Statements contained in this Current Report that are not historical facts are "forward-looking information" or "forward-looking statements" within the

meaning of applicable Canadian securities legislation and the United States Private Securities Litigation Reform Act of 1995. Forward-Looking Information

involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Perpetua to be

materially different from any future results, performance or achievements expressed or implied by the Forward-Looking Information.

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: October 2, 2023 By: /s/ Jessica Largent

Jessica Largent

Chief Financial Officer