[Form 4] NioCorp Developments Ltd. Insider Trading Activity

Rhea-AI Filing Summary

James T. Sims, Chief Communications Officer of NioCorp Developments Ltd. (NB), was granted 250,000 employee stock options on 08/18/2025 with an exercise price of $4.35. The filing shows 34% of the options vested on the grant date and the remainder vests in equal annual installments through August 18, 2027. The transaction is reported as an acquisition of derivative securities and the reporting person is identified as a director and officer. The options are listed as exercisable into 250,000 common shares and are held directly by Mr. Sims.

Positive

• Clear disclosure of option grant details including amount, exercise price, and vesting schedule
• Partial immediate vesting (34%) aligns executive incentives at grant date
• Multi-year vesting (through August 18, 2027) supports executive retention

Negative

• Potential dilution from 250,000 underlying common shares if options are exercised
• No information provided on the company's total outstanding shares to gauge dilution impact

Insights

Corporate Governance Expert

TL;DR: Insider option grant aligns executive incentives but increases potential share dilution; vesting schedule provides retention.

The Form 4 documents a standard executive equity grant: 250,000 employee stock options at a $4.35 exercise price, with 34% vesting at grant and the remainder vesting annually until August 18, 2027. This structure creates immediate alignment via partial vesting while using multi-year vesting to retain senior management. The filing indicates direct beneficial ownership of the underlying 250,000 common shares after exercise. The disclosure is routine but material to shareholders assessing compensation-related dilution and insider alignment.

Equity Compensation Specialist

TL;DR: Grant terms are typical for executive options; exercisability, exercise price, and vesting are clearly stated.

The entry shows an option grant with a $4.35 strike and 250,000 options acquired on 08/18/2025. The explanatory note specifies 34% immediate vesting, with remaining options vesting in equal installments annually to 08/18/2027. The Form 4 reports the options as direct holdings and identifies the reporting person as an officer and director. The certificate-level detail (number, strike, vesting) is sufficient for modeling potential future dilution and incentive timing.

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

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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^*

Sims James T.

(Last) (First) (Middle)

C/O NIOCORP DEVELOPMENTS LTD.

7000 YOSEMITE STREET, SUITE 115

(Street)

CENTENNIAL CO 80112

(City) (State) (Zip)

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

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

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

3. Date of Earliest Transaction (Month/Day/Year)
08/18/2025

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

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

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

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
Employee Stock Option (Right to Buy)	$4.35	08/18/2025		A		250,000		(1)	08/19/2030	Common Shares	250,000	$0	250,000	D

Explanation of Responses:

1. 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.

	/s/ James T. Sims	08/20/2025
	** 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.
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FAQ

What did James T. Sims report on Form 4 for NioCorp (NB)?

He reported an acquisition of 250,000 employee stock options granted on 08/18/2025 with an exercise price of $4.35.

How much of the option grant vested immediately?

34% of the options vested on the grant date, per the filing's explanation.

What is the vesting schedule for the remaining options?

The remainder vests in equal installments on each anniversary of the grant date until August 18, 2027.

Are the options held directly or indirectly?

The filing indicates the options are held directly (D) by James T. Sims.

When was the Form 4 signed and filed?

The Form 4 is signed by James T. Sims on 08/20/2025 reflecting the 08/18/2025 transaction.