Ernest M. Cleave - 18 Aug 2025 Form 4 Insider Report for NIOCORP DEVELOPMENTS LTD (NB)

Role: Senior VP Business Development
Signature: /s/ Neal S. Shah, attorney-in-fact
Issuer symbol: NB
Transactions as of: 18 Aug 2025
Net transactions value: $0
Form type: 4
Filing time: 05 Sep 2025, 17:36:22 UTC
Previous filing: 05 Sep 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Cleave Ernest M.	Senior VP Business Development	C/O NIOCORP DEVELOPMENTS LTD., 7000 YOSEMITE STREET, SUITE 115, CENTENNIAL	/s/ Neal S. Shah, attorney-in-fact	05 Sep 2025	0002084923

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	Employee Stock Option (Right to Buy)	Award	$0	+100,000		$0.000000	100,000	18 Aug 2025	Common Shares	100,000	$4.35	Direct	F1

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

Explanation of Responses:

Id	Content
F1	34% of the options vested on the grant date and the remainder will vest in equal installments on each anniversary of the grant date until August 18, 2027.