Mark A. Smith - 15 Dec 2025 Form 4 Insider Report for NIOCORP DEVELOPMENTS LTD (NB)

Role: President & CEO, Director
Signature: /s/ Mark A. Smith
Issuer symbol: NB
Transactions as of: 15 Dec 2025
Net transactions value: +$165,676
Form type: 4
Filing time: 15 Dec 2025, 16:19:59 UTC
Previous filing: 20 Aug 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Smith Mark A.	President & CEO, Director	C/O NIOCORP DEVELOPMENTS LTD., 7000 YOSEMITE STREET, SUITE 115, CENTENNIAL	/s/ Mark A. Smith	15 Dec 2025	0001496772

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	NB	Common Shares	Exercise of in-the-money or at-the-money derivative security	$165,676	+46,801	+2.1%	$3.54	2,318,819	15 Dec 2025	Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	NB	Common Share Purchase Warrant (right to buy)	Exercise of in-the-money or at-the-money derivative security	$0	-46,801	-100%	$0.000000	0	15 Dec 2025	Common Shares	46,801	$3.54	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.