NIOCORP DEVELOPMENTS LTD 10-Q

ITEM 5. OTHER INFORMATION Rule 10b5-1 Trading Arrangements During the quarter ended December 31, 2025 , no director or officer (as defined in Rule 16a-1(f) promulgated under the Exchange Act) of the Company adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement” (as each term is defined in Item 408 of Regulation S-K). ITEM 6. EXHIBITS Exhibit No. Title 2.1(1)*,** Asset Purchase Agreement, dated as of December 4, 2025, by and among NioCorp Advanced Metals and Alloys, LLC, FEA Materials LLC and each member of FEA Materials LLC party thereto 3.1(2) Notice of Articles dated April 5, 2016 3.2(2) Articles, as amended, effective as of January 27, 2015 3.3(3) Amendment to Articles, effective March 17, 2023 32 4.1(4) Placement Agency Agreement, dated as of October 13, 2025, by and between NioCorp Developments Ltd. and Maxim Group LLC 4.2(4) Form of October Pre-Funded Warrant (included in Exhibit 4.1) 4.3(5) Shareholder Rights Plan Agreement, dated as of November 21, 2025, between NioCorp Developments Ltd. and Computershare Investor Services Inc. 31.1 Certification of Chief Executive Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 31.2 Certification of Chief Financial Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 32.1 Certification of the Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 32.2 Certification of the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 101.INS(6) Inline XBRL Instance Document 101.SCH(6) Inline XBRL Taxonomy Extension Schema With Embedded Linkbase Documents 104 Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101) * Portions of this exhibit have been omitted pursuant to Item 601(b)(10)(iv) of Regulation S-K, which portions will be furnished to the Securities and Exchange Commission upon request. ** Certain exhibits to this agreement have been omitted pursuant to Item 601(a)(5) of Regulation S-K. A copy of any omitted exhibit will be furnished to the Securities and Exchange Commission upon request. (1) Previously filed as an exhibit to the Company’s Current Report on Form 8-K (File No. 001-41655) filed with the SEC on December 4, 2025, and incorporated herein by reference. (2) Previously filed as an exhibit to the Company’s Draft Registration Statement on Form S-1 (Registration No. 377-01354) submitted to the SEC on July 26, 2016, and incorporated herein by reference. (3) Previously filed as an exhibit to the Company’s Current Report on Form 8-K (File No. 001-41655) filed with the SEC on March 17, 2023, and incorporated herein by reference. (4) Previously filed as an exhibit to the Company’s Current Report on Form 8-K (File No. 001-41655) filed with the SEC on October 15, 2025, and incorporated herein by reference. (5) Previously filed as an exhibit to the Company’s Current Report on Form 8-K (File No. 001-41655) filed with the SEC on November 21, 2025, and incorporated herein by reference. (6) Submitted Electronically Herewith. Attached as Exhibit 101 to this report are the following formatted in inline XBRL (Extensible Business Reporting Language): (i) the Interim Condensed Consolidated Balance Sheets as of December 31, 2025 and June 30, 2025, (ii) the Interim Condensed Consolidated Statements of Operations and Comprehensive Loss for the Three and Six Months ended December 31, 2025 and 2024, (iii) the Interim Condensed Consolidated Statements of Cash Flows for the Six Months ended December 31, 2025 and 2024, (iv) the Interim Condensed Consolidated Statements of Shareholders’ Equity and Redeemable Noncontrolling Interest for the Three and Six Months ended December 31, 2025 and 2024 and (v) the Notes to the Interim Condensed Consolidated Financial Statements. 33 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. NIOCORP DEVELOPMENTS LTD. (Registrant) By: /s/ Mark A. Smith Mark A. Smith President, Chief Executive Officer and Executive Chairman (Principal Executive Officer) Date: February 6, 2026 By: /s/ Neal Shah Neal Shah Chief Financial Officer (Principal Financial and Accounting Officer) Date: February 6, 2026 34