NIOCORP DEVELOPMENTS LTD — fact timeline

NIOCORP DEVELOPMENTS LTD entered into Placement Agency Agreement with Maxim Group LLC valued at Issuance of 17,400,000 common shares at $5.00 per share and 2,600,000 pre-funded warrants at $4.9999 (effective 2026-02-24).

“On February 24, 2026, NioCorp Developments Ltd. (the “Company”) entered into a placement agency agreement (the “Placement Agency Agreement”) with Maxim Group LLC to act as the Company’s exclusive placement agent (the “Placement Agent”) to solicit offers to purchase common shares, without par value, of the Company (the “Common Shares”) (or pre-funded warrants (the “Pre-Funded Warrants”) to purchase Common Shares in lieu thereof) in a public offering registered under the Securities Act (as defined below) (the “Offering”).”

NIOCORP DEVELOPMENTS LTD entered into Purchase of Manufacturing Assets and Intellectual Property with FEA Materials LLC valued at $8.4 million (effective 2025-12-04).

“NioCorp Advanced Metals and Alloys LLC (“ NAMA ”), a newly formed subsidiary of NioCorp and its operating company Elk Creek Resources Corp. (“ ECRC ”), completed the all-cash $8.4 million purchase of FEA’s assets and IP on December 4, 2025.”

NIOCORP DEVELOPMENTS LTD completed an acquisition involving FEA Materials LLC for $8.4 million (closed 2025-12-04).

“Pursuant to the Purchase Agreement, on December 4, 2025, the Buyer acquired substantially all the assets, except for certain excluded assets, and assumed certain specified liabilities, of FEA, for an aggregate purchase price of $8.4 million, subject to adjustments for certain indemnification obligations that may arise, if any.”

NIOCORP DEVELOPMENTS LTD issued securities.

“approved the Company’s limited-duration shareholder rights plan (the “Rights Plan”) as set forth in the Shareholder Rights Plan Agreement, dated as of November 21, 2025”

NIOCORP DEVELOPMENTS LTD completed an acquisition involving Victor and Juanita Woltemath for approximately $7.4 million (closed 2025-09-30).

“Option Agreement provided for a purchase price calculated based on the appraised value per acre of the Woltemath003J Property. The aggregate purchase price was approximately $7.4 million. On the closing date of the purchase of the Woltemath003J Property, the Company recorded a decrease in cash under current assets on its consolidated balance sheet of”

NIOCORP DEVELOPMENTS LTD completed an acquisition involving Roger and Nancy Woltemath for approximately $3.9 million (closed 2025-09-30).

“Option Agreement provided for a purchase price calculated based on the appraised value per acre of the Woltemath002 Property. The aggregate purchase price was approximately $3.9 million. On the closing date of the purchase of the Woltemath002 Property, the Company recorded a decrease in cash under current assets on its consolidated balance sheet of approximately”

NIOCORP DEVELOPMENTS LTD completed an acquisition involving Elk Creek Resources Corp. ("ECRC") for aggregate purchase price of approximately $2.7 million (closed 2025-08-01).

“The Option Agreements provided for a purchase price calculated based on the appraised value per acre of the parcels of land. The aggregate purchase price was approximately $2.7 million. On the closing date of the purchase of the Property, the Company recorded a decrease in cash under current assets on its consolidated balance sheet of approximately $2.7”

NIOCORP DEVELOPMENTS LTD received a nasdaq noncompliance notice notice regarding audit committee (rules 5605(c)(2)(A), 5605(c)(4)(B)).

“July 22, 2025, the Company notified The Nasdaq Stock Market LLC (“Nasdaq”) that due to Mr. Morris’ death, the Company’s Audit Committee has been reduced to two independent directors, and the Company is not compliant with Nasdaq Listing Rule 5605(c)(2)(A), which requires the Audit Committee to be comprised of a minimum of three independent directors. Pursuant to Nasdaq Listing Rule 5605(c)(4)(B), the Company has a cure period to regain compliance until the earlier of the Company’s next annual meeting of shareholders and July 20, 2026; provided that if the Company holds its next annual meeting o”

NIOCORP DEVELOPMENTS LTD amended SEPA with YA II PN, Ltd. ("Yorkville") (effective 2024-05-03).

“On May 3, 2024, in connection with the delisting of the Common Shares from the Toronto Stock Exchange (the “TSX”), the Company and Yorkville entered into an amendment to the SEPA (the “Amendment”)”

NIOCORP DEVELOPMENTS LTD incurred convertible notes of $8,000,000 aggregate principal amount with YA II PN, Ltd. and Lind Global Fund II LP at simple interest rate obligation of 0.0% per annum (which will increase to 18.0% maturing December 31, 2024.

“On April 11, 2024, NioCorp Developments Ltd. ("NioCorp" or the “Company”) entered into a securities purchase agreement (the “Purchase Agreement”), with YA II PN, Ltd. (“Yorkville”) and Lind Global Fund II LP (“Lind” and together with Yorkville, the “Purchasers”), pursuant to which the Company agreed to issue and sell to the Purchasers, in a private placement (the “Private Placement”), $8,000,000 aggregate principal amount of unsecured notes (the “Notes”).”

NIOCORP DEVELOPMENTS LTD shareholders approved Approval, on a Nonbinding, Advisory Basis, of the Compensation of the Company's Named Executive Officers..

“Proposal Five – Approval, on a Nonbinding, Advisory Basis, of the Compensation of the Company’s Named Executive Officers. Votes For: 6,979,044 Votes Against: 865,175 Votes Withheld: 108,373 Broker non-votes: 4,948,125”

NIOCORP DEVELOPMENTS LTD shareholders approved Approval of the Amendment and Restatement of the NioCorp Developments Ltd. Long-Term Incentive Plan..

“Proposal Four – Approval of the Amendment and Restatement of the NioCorp Developments Ltd. Long-Term Incentive Plan. Votes For: 6,616,125 Votes Against: 1,137,590 Votes Withheld: 198,876 Broker non-votes: 4,948,126”

NIOCORP DEVELOPMENTS LTD shareholders approved Appointment of Deloitte & Touche LLP as Auditors of the Company for the Ensuing Year and Authorizing the Directors to Fix Their Remuneration..

“Proposal Three – Appointment of Deloitte & Touche LLP as Auditors of the Company for the Ensuing Year and Authorizing the Directors to Fix Their Remuneration. Votes For: 12,710,255 Votes Withheld: 190,461 Broker non-votes: 1”

NIOCORP DEVELOPMENTS LTD shareholders approved Election of Directors..

“Proposal Two – Election of Directors. Nominee Votes FOR Votes WITHHELD Broker Non-Votes Mark A. Smith 7,473,610 478,983 4,948,124 Michael J. Morris 6,603,433 1,349,159 4,948,125 David C. Beling 7,220,373 732,219 4,948,125 Nilsa Guerrero-Mahon 7,150,587 802,005 4,948,125 Peter Oliver 7,151,643 800,949 4,948,125 Michael Maselli 7,325,594 626,998 4,948,125 Dean Kehler 7,286,924 665,669 4,948,124”

NIOCORP DEVELOPMENTS LTD shareholders approved To Set the Number of Directors for the Ensuing Year at Seven..

“Proposal One – To Set the Number of Directors for the Ensuing Year at Seven. Votes For: 12,341,575 Votes Against: 559,141 Abstentions: 0 Broker non-votes: 1”

NIOCORP DEVELOPMENTS LTD entered into Subscription Agreements with certain accredited investors valued at approximately US$1.29 million (effective 2023-12-14).

“On December 14, 2023 , NioCorp Developments Ltd. (the “Company”) entered into binding subscription agreements (the “Subscription Agreements”) with certain accredited investors as part of a non-brokered private placement (the “Private Placement”) of an aggregate of 413,432 units of the Company (the “Units”), each of which consists of one of the Company’s common shares, without par value (the “Common Shares”), and one of the Company’s Common Share purchase warrants (the “Warrants”).”

NIOCORP DEVELOPMENTS LTD engaged Deloitte & Touche LLP as its auditor.

“the Company’s board of directors (the “Board”), on the recommendation of the audit committee of the Board, approved the appointment of Deloitte & Touche LLP (“Deloitte”) as the Company’s new independent registered public accounting firm, effective immediately”

BDO resigned as auditor of NIOCORP DEVELOPMENTS LTD.

“On December 4, 2023, BDO notified the Company that it resigned as the Company's independent registered public accounting firm, effective immediately.”

NIOCORP DEVELOPMENTS LTD reported the fiscal year ended June 30, 2023 results: net income Loss for the fiscal year ended June 30, 2023 of $39.497 million, EPS $1.32 per share.

“NioCorp Provides Preliminary Financial Results for the Fiscal Year Ended June 30, 2023”

NIOCORP DEVELOPMENTS LTD entered into Subscription Agreement with a single investor (effective 2023-09-01).

“the Company entered into a subscription agreement (the "Subscription Agreement") by and between the Company and the investor.”

NIOCORP DEVELOPMENTS LTD received a nasdaq deficiency notice notice regarding late filing (rules 5250(c)(1)).

“May 24, 2023, NioCorp Developments Ltd. (“NioCorp” or the “Company”) received a letter from the Listing Qualifications Department of The Nasdaq Stock Market LLC (“Nasdaq”) indicating that, because the Company has not filed its Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2023 (the “Form 10-Q”) within the prescribed time period, the Company is not in compliance with the timely filing requirement for continued listing under Nasdaq Listing Rule 5250(c)(1). The Nasdaq notification letter has no immediate effect on the listing or trading of the Company’s common shares on N”

NIOCORP DEVELOPMENTS LTD reported that prior financial statements should not be relied upon.

“onsolidated financial statements for the Affected Periods should not be relied upon and should be restated by adjusting deferred transaction costs, convertible debt, and warrant liability recognized in each of the Affected Periods. Any previously issued or filed reports, press releases, earnings releases and investor presentations or other communications describing the Company’s previously issued consolidated financial statements and other related financial information covering the Affected Periods should no longer be relied upon. On February 16, 2021, the Company entered into a Convertible Security Funding Agreement (the “CSFA”) with Lind Global Asset Management III, LLC (“Lind”), pursuant to which the Company issued a convertible security to Lind. Pursuant to the CSFA, Lind had certain consent and participation rights applicable in connection with the transactions contemplated by the B”

Fernanda Reda Fenga Viana Klamas resigned as director at NIOCORP DEVELOPMENTS LTD.

“On May 15, 2023, Ms. Fernanda Reda Fenga Viana Klamas, director of NioCorp Developments Ltd. (the “ Company ”), advised the Company of her resignation from the Board of Directors of the Company (the “ Board ”) effective immediately.”

NIOCORP DEVELOPMENTS LTD underwent a change of control involving GX Acquisition Corp. II (closed 2023-03-17).

“the transactions contemplated by the Business Combination Agreement were consummated and closed (the “Closing”) on March 17, 2023 (the “Closing Date”).”

NIOCORP DEVELOPMENTS LTD entered into Assignment, Assumption and Amendment Agreement with NioCorp, GX, Continental Stock Transfer & Trust Company, and Computershare Inc. and its affiliate (effective 2023-03-17).

“the Company entered into that certain Assignment, Assumption and Amendment Agreement (the “Warrant Assumption Agreement”), by and among NioCorp, GX, Continental Stock Transfer & Trust Company, as existing warrant agent (“CST”), and Computershare Inc. and its affiliate, Computershare Trust Company, N.A., together as successor warrant agent (“Computershare”)”

NIOCORP DEVELOPMENTS LTD entered into Exchange Agreement with NioCorp, GX, and the Sponsor (effective 2023-03-17).

“Exchange Agreement Pursuant to the Business Combination Agreement, at the Closing, NioCorp, GX and the Sponsor entered into the Exchange Agreement, dated March 17, 2023 (the “Exchange Agreement”), pursuant to which,”

NIOCORP DEVELOPMENTS LTD entered into Amended and Restated Registration Rights Agreement with GX, the Sponsor, the pre-Closing directors and officers of NioCorp and the other parties (collectively, the “RRA Shareholders”) (effective 2023-03-17).

“NioCorp, GX and the Sponsor, in its capacity as a shareholder of GX, the pre-Closing directors and officers of NioCorp and the other parties thereto (collectively, the “RRA Shareholders”) entered into the Amended and Restated Registration Rights Agreement, dated March 17, 2023 (the “Registration Rights and Lockup Agreement”)”

Dean C. Kehler was appointed as Director at NIOCORP DEVELOPMENTS LTD.

“Effective immediately upon the Closing, the Board increased the size of the Board to nine members and appointed each of Michael G. Maselli and Dean C. Kehler to the Board”

Michael G. Maselli was appointed as Director at NIOCORP DEVELOPMENTS LTD.

“Effective immediately upon the Closing, the Board increased the size of the Board to nine members and appointed each of Michael G. Maselli and Dean C. Kehler to the Board”

NIOCORP DEVELOPMENTS LTD shareholders approved The Quorum Amendment Proposal: To approve, with or without amendment, an amendment to the NioCorp Articles to require the presence, in person or by proxy, of two or more shareholders representing at least 33 1/3% of the outstanding shares entitled to be voted in order to constitute a quorum at any m at the 2023-03-10 meeting.

“PROPOSAL 4 “The Quorum Amendment Proposal”: To approve, with or without amendment, an amendment to the NioCorp Articles to require the presence, in person or by proxy, of two or more shareholders representing at least 33 1/3% of the outstanding shares entitled to be voted in order to constitute a quorum at any meeting of NioCorp shareholders. For Against Abstain 110,267,696 2,784,406 1,840,089”

NIOCORP DEVELOPMENTS LTD shareholders approved The Yorkville Convertible Debt Financing Proposal: To approve the issuance of all of the convertible debentures of NioCorp that may be issuable, all of the warrants of NioCorp that may be issuable, and all of the Common Shares that may be issuable upon conversion of the principal amount of, and any at the 2023-03-10 meeting.

“PROPOSAL 3 “The Yorkville Convertible Debt Financing Proposal”: To approve the issuance of all of the convertible debentures of NioCorp that may be issuable, all of the warrants of NioCorp that may be issuable, and all of the Common Shares that may be issuable upon conversion of the principal amount of, and any and all accrued interest on, the convertible debentures at the Conversion Price (as defined in the Joint Proxy Statement/Prospectus) and upon exercise of the warrants, in each case, in connection with the transactions contemplated by the Securities Purchase Agreement, dated January 26, 2023, by and between NioCorp and Yorkville, as may be amended from time to time, including by the Amendment No. 1 to Securities Purchase Agreement, dated February 24, 2023, by and between NioCorp and Yorkville. For Against Abstain 110,465,612 2,573,620 1,852,959”

NIOCORP DEVELOPMENTS LTD shareholders approved The Yorkville Equity Financing Proposal: To approve the issuance of all of the Common Shares that may be issuable upon a sale at the Purchase Price and all of the Commitment Shares to be issued, in each case, in connection with the transactions contemplated by the Standby Equity Purchase Agreement, at the 2023-03-10 meeting.

“PROPOSAL 2 “The Yorkville Equity Financing Proposal”: To approve the issuance of all of the Common Shares that may be issuable upon a sale at the Purchase Price (as defined in the Joint Proxy Statement/Prospectus) and all of the Commitment Shares (as defined in the Joint Proxy Statement/Prospectus) to be issued, in each case, in connection with the transactions contemplated by the Standby Equity Purchase Agreement, dated January 26, 2023, by and between NioCorp and YA II PN, Ltd., an investment fund managed by Yorkville Advisors Global, LP (together with YA II PN, Ltd., “Yorkville”), as may be amended from time to time. For Against Abstain 110,346,350 2,559,143 1,986,698”

NIOCORP DEVELOPMENTS LTD shareholders approved The Share Issuance Proposal: To approve the issuance of Common Shares, and including the possible creation of GX Sponsor II LLC as a control person, in connection with the Transactions. at the 2023-03-10 meeting.

“PROPOSAL 1 “The Share Issuance Proposal”: To approve the issuance of Common Shares, and including the possible creation of GX Sponsor II LLC as a control person, in connection with the Transactions. For Against Abstain 110,565,875 2,728,919 1,597,397”

NIOCORP DEVELOPMENTS LTD amended credit facility of $4.0 million with Mark A. Smith.

“On February 28, 2023, the Company and Mr. Smith entered into an amending agreement to the Smith Credit Facility (the “Smith Credit Facility Extension Agreement”), increasing the size of the facility to $4.0 million.”

NIOCORP DEVELOPMENTS LTD amended Amendment with NioCorp and Yorkville (effective 2023-02-24).

“On February 24, 2023, NioCorp and Yorkville entered into an amendment to the Yorkville Convertible Debt Financing Agreement (the “Amendment”) pursuant to which the terms of the Convertible Debentures were amended to provide, among other things, that the Conversion Price (as defined in the Convertible Debentures) shall not be less than a floor price equal to the lesser of (a) 30% of the average of the daily volume-weighted average price of NioCorp's common shares (the “Common Shares”) on the principal U.S. market for the Common Shares as reported by Bloomberg Financial Markets (“VWAP”) during the five consecutive trading days immediately preceding the date of the closing of the Transaction (the “First Closing Date”) and (b) 30% of the average of the daily VWAP of the Common Shares during the five consecutive trading days immediately following the First Closing Date, subject to certain adjustments to give effect to any stock dividend, stock split, reverse stock split or recapitalization.”

NIOCORP DEVELOPMENTS LTD entered into Yorkville Convertible Debt Financing Agreement with YA II PN, Ltd. (an investment fund managed by Yorkville Advisors Global, LP) and Yorkville valued at up to a total of $16 million aggregate principal amount (effective 2023-01-26).

“On January 26, 2023, NioCorp Developments Ltd. (“NioCorp”) entered into a Securities Purchase Agreement (the “Yorkville Convertible Debt Financing Agreement”) with YA II PN, Ltd., an investment fund managed by Yorkville Advisors Global, LP (together with YA II PN, Ltd., “Yorkville”), pursuant to which, among other matters, NioCorp agreed to issue to Yorkville, and any investor that exercises its contractual right previously granted by NioCorp to participate in the transactions contemplated by the Yorkville Convertible Debt Financing Agreement, up to a total of $16 million aggregate principal amount of unsecured convertible debentures of NioCorp”

NIOCORP DEVELOPMENTS LTD incurred convertible notes of $16,000,000 aggregate principal amount of unsecured convertible debentures with YA II PN, Ltd. (Yorkville) at 5.0% per annum (increasing to 15.0% per annum upon event of default) maturing 18-month term from the First Debenture Closing, extendable by one six-month period at NioCorp's option.

“up to $16,000,000 aggregate principal amount of unsecured convertible debentures of NioCorp (the “Convertible Debentures”) convertible into common shares of NioCorp (the “Common Shares”) and Common Share purchase warrants (the “Financing Warrants”) entitling the holders thereof to purchase additional Common Shares (the “Yorkville Convertible Debt Financing”)”

NIOCORP DEVELOPMENTS LTD entered into Yorkville Equity Facility Financing Agreement with YA II PN, Ltd. valued at up to $65,000,000 (effective 2023-01-26).

“On January 26, 2023, NioCorp Developments Ltd. ("NioCorp") entered into definitive agreements with respect to two previously announced financings with YA II PN, Ltd., an investment fund managed by Yorkville Advisors Global, LP (together with YA II PN, Ltd., “Yorkville”). The financings contemplated by the definitive agreements include (i) up to $16,000,000 aggregate principal amount of unsecured convertible debentures of NioCorp (the “Convertible Debentures”) convertible into common shares of NioCorp (the “Common Shares”) and Common Share purchase warrants (the “Financing Warrants”) entitling the holders thereof to purchase additional Common Shares (the “Yorkville Convertible Debt Financing”); and (ii) a standby equity purchase facility pursuant to which NioCorp will have the right, but not the obligation, subject to the conditions set out therein, to sell Common Shares to Yorkville with a maximum aggregate value of up to $65,000,000 over a period of up to 36 months (the “Yorkville Equ”

NIOCORP DEVELOPMENTS LTD entered into Yorkville Convertible Debt Financing Agreement with YA II PN, Ltd. valued at up to $16,000,000 aggregate principal amount of unsecured convertible debentures (effective 2023-01-26).

“On January 26, 2023, NioCorp entered into a Securities Purchase Agreement (the “Yorkville Convertible Debt Financing Agreement”), by and between NioCorp and Yorkville. Pursuant to the Yorkville Convertible Debt Financing Agreement, Yorkville, and any investor that exercises its contractual right previously granted by NioCorp to participate in the Yorkville Convertible Debt Financing (collectively with Yorkville, the “Investors”), will advance an initial total amount of $9,600,000 to NioCorp in consideration of the issuance by NioCorp to the Investors of $10,000,000 aggregate principal amount of Convertible Debentures at the time of Closing (the “First Debenture Closing”), and an additional total amount of $5,760,000 to NioCorp in consideration of the issuance by NioCorp to the Investors of $6,000,000 aggregate principal amount of Convertible Debentures on a date to be determined at the election of NioCorp, but which may not be prior to the later to occur of (i) the date of filing of th”

NIOCORP DEVELOPMENTS LTD shareholders voted on Approval, on a nonbinding, advisory basis, of the frequency of future shareholder advisory votes to approve the compensation of the Company’s named executive officers at the 2022-12-15 meeting.

“Proposal Five – Approval, on a nonbinding, advisory basis, of the frequency of future shareholder advisory votes to approve the compensation of the Company’s named executive officers. Votes for Every Year: 52,888,441 Votes for Every Two Years: 394,544 Votes for Every Three Years: 1,005,754 Votes Withheld: 535,523 Broker non-votes: 37,536,679”

NIOCORP DEVELOPMENTS LTD shareholders approved Approval, on a nonbinding, advisory basis, of the compensation of the Company’s named executive officers at the 2022-12-15 meeting.

“Proposal Four – Approval, on a nonbinding, advisory basis, of the compensation of the Company’s named executive officers. Votes For: 51,547,037 Votes Against: 2,781,885 Votes Withheld: 782,463 Broker non-votes: 37,249,556”

NIOCORP DEVELOPMENTS LTD shareholders approved Appointment of BDO USA, LLP as Auditors of the Company for the Ensuing Year and Authorizing the Directors to Fix Their Remuneration at the 2022-12-15 meeting.

“Proposal Three – Appointment of BDO USA, LLP as Auditors of the Company for the Ensuing Year and Authorizing the Directors to Fix Their Remuneration. Votes For: 90,796,295 Votes Withheld: 1,564,646 Broker non-votes: 0”

NIOCORP DEVELOPMENTS LTD shareholders approved Election of Directors at the 2022-12-15 meeting.

“Proposal Two – Election of Directors. Nominee Votes FOR Votes WITHHELD Broker Non-Votes Mark A. Smith 53,635,875 1,475,510 37,249,556 Michael J. Morris 53,770,413 1,340,972 37,249,556 David C. Beling 51,810,571 3,300,814 37,249,556 Anna Castner-Wightman 51,727,409 3,383,977 37,249,556 Nilsa Guerrero-Mahon 53,879,306 1,232,079 37,249,556 Fernanda Reda Fenga Viana Klamas 53,776,778 1,334,607 37,249,556 Peter Oliver 54,035,162 1,076,224 37,249,556”

NIOCORP DEVELOPMENTS LTD shareholders approved To Set the Number of Directors for the Ensuing Year at Seven. at the 2022-12-15 meeting.

“Proposal One – To Set the Number of Directors for the Ensuing Year at Seven. Votes For: 53,603,656 Votes Against: 1,507,729 Abstentions: 0 Broker non-votes: 37,249,556”

Peter Oliver was appointed as Director at NIOCORP DEVELOPMENTS LTD.

“On May 25, 2022, the Board of Directors (the “Board”) of NioCorp Developments Ltd. (the “Company”) increased the size of the Board to seven members and appointed Peter Oliver as a Director to fill the resulting vacancy.”