NIOCORP DEVELOPMENTS LTD

(1) 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.

(2) 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.

(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 February 25, 2026, 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 April 6, 2026, and incorporated herein by reference.

(5) 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 March 31, 2026 and June 30, 2025, (ii) the Interim Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) for the Three and Nine Months ended March 31, 2026 and 2025, (iii) the Interim Condensed Consolidated Statements of Cash Flows for the Nine Months ended March 31, 2026 and 2025, (iv) the Interim Condensed Consolidated Statements of Shareholders’ Equity and Redeemable Noncontrolling Interest for the Three and Nine Months ended March 31, 2026 and 2025 and (v) the Notes to the Interim Condensed Consolidated Financial Statements.