NioCorp director Maselli acquires 32,573 stock options

The options have an exercise price of $4.74 per share and expire July 3, 2031.

Available on EDGAR 11/10/2026 - 05:02 PM EST Accepted by SEC EDGAR 11/10/2026 - 05:01 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

NioCorp Developments Ltd. director Michael G. Maselli acquired 32,573 director stock options on November 9, 2026. Of these options, 10,857 vested on the grant date, 10,857 will vest on July 6, 2027, and the remaining balance will vest on July 6, 2028.

Insider Trade Summary

Grant/Award: 32,573 shares

Grant/Award 1 txn

Insider Maselli Michael G.

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Director Stock Option (Right to Buy) F1	32,573	$0.00	$0.00

Holdings After Transaction: Director Stock Option (Right to Buy) — 32,573 options (Direct)

Holdings Before and After: Director Stock Option (Right to Buy), 0 to 32,573 options (Direct)

Footnotes (1)

1. F1. 10,857 of the options vested on the grant date, 10,857 will vest on July 6, 2027, and the remaining balance will vest on July 6, 2028.

Key Figures

Director stock options acquired: 32,573 options Common Shares underlying options: 32,573 shares Exercise price: $4.74 per share +3 more

6 metrics

Director stock options acquired 32,573 options November 9, 2026

Common Shares underlying options 32,573 shares Underlying security for the options

Exercise price $4.74 per share Director stock options

Options vested on grant date 10,857 options Vested on November 9, 2026

Options scheduled to vest 10,857 options July 6, 2027

Expiration date July 3, 2031 Director stock options

Key Terms

Director Stock Option (Right to Buy), exercise price, vested

3 terms

Director Stock Option (Right to Buy) technical

"Director Stock Option (Right to Buy)"

exercise price financial

"exercise price of $4.74"

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

vested financial

"10,857 of the options vested on the grant date"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many options did NB director Michael G. Maselli acquire?

Michael G. Maselli acquired 32,573 director stock options on November 9, 2026. They have an exercise price of $4.74 per share and expire July 3, 2031.

What is the vesting schedule for NB director Michael G. Maselli's options?

10,857 options vested on the grant date; 10,857 will vest on July 6, 2027; the remaining balance will vest on July 6, 2028.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Maselli Michael G.

(Last) (First) (Middle)

C/O NIOCORP DEVELOPMENTS LTD.

7000 YOSEMITE STREETE, SUITE 115

(Street)

CENTENNIAL COLORADO 80112

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
NIOCORP DEVELOPMENTS LTD [ NB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
11/09/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Director Stock Option (Right to Buy)	$4.74	11/09/2026		A		32,573		(1)	07/03/2031	Common Shares	32,573	$0	32,573	D

Explanation of Responses:

1. 10,857 of the options vested on the grant date, 10,857 will vest on July 6, 2027, and the remaining balance will vest on July 6, 2028.

	/s/ Neal S. Shah, as attorney-in-fact	11/10/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)