Amendment: SEC Form SCHEDULE 13D/A filed by Northern Dynasty Minerals Ltd.

The address of each of Kopernik Global Investors, LLC and David B. Iben for purposes of this filing is: Two Harbour Place 302 Knights Run Avenue, Suite 1225, Tampa, FL 33602.

(1) Kopernik Global Investors, LLC provides investment advisory services to (i) registered investment companies, (ii) institutional asset management clients: separately managed accounts, unregistered investment companies, a bank collective investment trust, and other collective investment vehicles, and (iii) other advisers (on a sub-advisory basis). (2) Mr. Iben's present principal occupation is chief investment officer of Kopernik Global Investors, LLC. Mr. Iben is the controlling member of Kopernik Global Investors, LLC.

None of the Reporting Persons during the past five years have been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

None of the Reporting Persons during the past five years have been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting, or mandating activities subject to, federal or state securities laws or a finding of any violation with respect to such laws.

(1) Kopernik Global Investors, LLC is a Delaware limited liability company. (2) David B. Iben is a citizen of the United States of America.

The Reporting Persons purchased the Common Shares for investment for such investment funds and other clients. The Common Shares beneficially owned by the Reporting Persons (other than the Common Shares that are beneficially owned upon conversion of the Convertible Notes (as defined below)) were purchased with available funds of applicable client accounts in Kopernik Global Investors' ordinary course of business. The aggregate purchase price of the 38,167,817 Common Shares beneficially owned by the Reporting Persons is approximately $25,390,347 including brokerage commissions. On December 28, 2023, Kopernik Global Investors entered into an investment agreement (the "Investment Agreement") with the Issuer relating to the issuance and sale of the Convertible Notes for $15,000,000 in cash. The acquisition of the original Convertible Notes was funded with available funds of applicable client accounts in Kopernik Global Investors' ordinary course of business and, for the portion of the Convertible Notes purchased directly by Kopernik Global Investors, with available funds in Kopernik Global Investors' business account in its ordinary course of business.

The Reporting Persons acquired the Issuer's securities for investment purposes. While the Reporting Persons do not have any current plans, proposals or agreements with respect to the Common Shares, the Reporting Persons intend to continue to review, on an ongoing and continuing basis, its investment in the Issuer, and may, from time to time and at any time, acquire additional Common Shares in the open market or otherwise and reserve the right to dispose of any or all of the Common Shares in the open market or otherwise, at any time and from time to time, and to engage in any hedging or similar transactions with respect to the Common Shares. On March 24, 2023, Ms. Isabel Satra was appointed as a director of the Issuer. Ms. Satra is currently a Principal at Kopernik Global Investors and serves as the firm's Chief Financial Officer. As a result of Ms. Satra's appointment to the Board, the Reporting Persons converted the beneficial ownership filing on Schedule 13G to a filing on Schedule 13D. Except as described in this Schedule 13D, the Reporting Persons do not have any present plans or proposals that relate to or would result in any of the actions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D, although, the Reporting Persons, at any time and from time to time, may review, reconsider and change their position and/or change their purpose and/or develop such plans and may seek to influence management or the Board with respect to the business and affairs of the Issuer and may from time to time consider pursuing or proposing such matters with advisers, the Issuer or other persons.

The Reporting Persons may be deemed to beneficially own, in the aggregate, 77,209,270 Common Shares, representing 13.3% of the outstanding Common Shares.

With respect to any rights or powers to vote, or to direct the vote of, or to dispose of, or to direct the disposition of, the Common Shares owned by the Reporting Persons: (i) Sole power to vote, or to direct the vote of, or to dispose of, or to direct the disposition of: Not applicable. (ii) Shared power to vote, or to direct the vote of, or to dispose of, or direct the disposition of: Kopernik Global Investors has the shared power to vote, or to direct the vote of, 76,418,843 Common Shares and shared power to dispose of, or direct the disposition of, 80,338,185 Common Shares. Mr. Iben has the shared power to vote, or to direct the vote of, 76,418,843 Common Shares and shared power to dispose of, or direct the disposition of, 80,338,185 Common Shares.

Other than as described in Schedule A, the Reporting Persons have not engaged in any transactions in the Common Shares in the past 60 days.

Other than the entities and persons described in this Item 5, to the knowledge of the Reporting Persons, no other person has the right to receive or the power to direct the receipt of dividends from, or proceeds from the sale of, the shares of Common Shares owned by the Reporting Persons.

Not applicable.

Except as otherwise described herein, there are no contracts, arrangements, understandings or relationships (legal or otherwise) among the persons named in Item 2 and between such persons and any person with respect to any securities of the Issuer, including, but not limited to, transfer or voting of any of the securities, finder's fees, joint ventures, loan or option arrangements, puts or calls, guarantees of profits, division of profits or loss, or the giving or withholding of proxies. 2023 Convertible Notes On December 18, 2023, pursuant to the Investment Agreement, Kopernik Global Investors purchased convertible notes having an aggregate principal amount of $15 million (the "Convertible Notes"). The Convertible Notes have a term of 10 years from the date of issuance, being December 18, 2023, and bear interest at a rate of 2.0% per annum, payable in cash semi-annually in arrears on December 31 and June 30 of each year, commencing on June 30, 2024. The principal amount of the Convertible Notes is convertible at any time at the option of Kopernik Global Investors into Common Shares at a per share conversion price of $0.3557 (the "Conversion Price"), subject to adjustment in certain circumstances (i.e., including a change of control). If the Issuer proceeds with an equity financing in the future, the terms of the Convertible Notes require that the Issuer redeem the Convertible Notes at 150% of the principal amount of the Convertible Notes, in cash or convert at the Conversion Price, at the election of the Investor, and pay any accrued but unpaid interest in cash. This financing is subject to customary exclusions for non-financing issuances of the Issuer's equity securities. In addition, the Convertible Notes include change of control provisions under which (i) Kopernik Global Investors may elect to convert the Convertible Notes concurrent with a change of control transaction at the lower of the fixed Conversion Price and the price per common share implied by the change of control transaction, and (ii) if Kopernik Global Investors does not elect to convert, the Issuer will be required to offer to repurchase the Convertible Notes at 101% of the principal amount, plus accrued but unpaid interest. The foregoing descriptions of the Investment Agreement and the Convertible Note do not purport to be complete and are qualified in their entirety by reference to the full text of the Investment Agreement, which is filed hereto as Exhibit 99.3, and the Convertible Note, which is filed hereto as Exhibit 99.4, and are incorporated by reference herein.

99.1 Joint Filing Agreement, dated November 4, 2024 by and between Kopernik Global Investors, LLC and David B. Iben is incorporated herein by reference to Exhibit 99.1 of Schedule 13D filed with the SEC via EDGAR Accession No. 0000930413-24-003094 on November 4, 2024. 99.2 Power of Attorney appointing Sarah L. Bertrand, dated October 25, 2024, signed by David B. Iben is incorporated herein by reference to Exhibit 99.2 of Schedule 13D filed with the SEC via EDGAR Accession No. 0000930413-24-003094 on November 4, 2024. 99.3 Form of Investment Agreement, dated December 8, 2021, by and between Northern Dynasty Minerals Ltd. and Kopernik Global Investors, LLC is incorporated herein by reference to Exhibit 99.3 of Schedule 13D filed with the SEC via EDGAR Accession No. 0000930413-24-003094 on November 4, 2024. 99.4 Form of Convertible Note, dated December 18, 2023 is incorporated herein by reference to Exhibit 99.4 of Schedule 13D filed with the SEC via EDGAR Accession No. 0000930413-24-003094 on November 4, 2024. 99.5 Schedule A.