NioCorp shareholders vote >96% to approve business combination with GXII and up to $81M in Yorkville financings

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

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

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

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