Rare Element Resources (REEMF) major shareholder buys more common shares

Rhea-AI Filing Summary

Rare Element Resources Ltd. reported a large insider purchase of Common Shares by entities associated with major shareholder Synchron. On March 10, 2026, Synchron, a wholly owned subsidiary of General Atomic Technologies Corporation and ultimately Tenaya Corporation, executed an open-market purchase of 100,149,060 Common Shares.

Following this transaction, Synchron’s direct holdings increased to 460,889,576 Common Shares. All shares are held of record by Synchron within this ownership chain, reflecting activity by a greater-than-10% shareholder rather than by individual company officers or directors.

Insights

Equity analyst

Large open-market buy by a 10% holder increases Rare Element Resources’ concentrated ownership.

A major shareholder group, led by Synchron and its parent entities, purchased 100,149,060 Common Shares of Rare Element Resources Ltd. in an open-market transaction on March 10, 2026. The transaction code P confirms it as a purchase rather than a grant or restructuring move.

Post-transaction, the reporting group directly holds 460,889,576 Common Shares, indicating a substantial equity position. As this is a discretionary open-market buy, it differs from routine compensation or tax-withholding activity and may signal increased commitment by this greater-than-10% owner, though actual valuation impact depends on overall share count and market conditions not shown here.

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
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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^*

Synchron

(Last) (First) (Middle)

3550 GENERAL ATOMICS COURT

(Street)

SAN DIEGO CALIFORNIA 92121

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
RARE ELEMENT RESOURCES LTD [ REEMF ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/10/2026

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

	Form filed by One Reporting Person
X	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
Common Shares	03/10/2026		P		100,149,060	A	$24,035,774.4	460,889,576	D(1)

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

1. Name and Address of Reporting Person^*

Synchron

(Last) (First) (Middle)

3550 GENERAL ATOMICS COURT

(Street)

SAN DIEGO CALIFORNIA 92121

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

GENERAL ATOMIC TECHNOLOGIES CORP

(Last) (First) (Middle)

3550 GENERAL ATOMICS COURT,

(Street)

SAN DIEGO, CALIFORNIA 92121-1122

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Tenaya Corp

(Last) (First) (Middle)

3550 GENERAL ATOMICS COURT,

(Street)

SAN DIEGO, CALIFORNIA 92121-1122

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

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

Explanation of Responses:

1. The Common Shares are held of record by Synchron, a wholly-owned subsidiary of General Atomic Technologies Corporation ("GATC"), which is a wholly-owned subsidiary of Tenaya Corporation ("Tenaya").

Remarks:

GATC may be deemed to beneficially own all of the Common Shares beneficially owned by Synchron as its sole shareholder. Tenaya may be deemed to beneficially own all of the Common Shares beneficially owned by Synchron as the sole shareholder of GATC.

	SYNCHRON /s/ Kristopher S. George Name: Kristopher S. George Title: Assistant Treasurer	03/23/2026
	GENERAL ATOMIC TECHNOLOGIES CORPORATION /s/ Kristopher S. George Name: Kristopher S. George Title: Assistant Treasurer	03/23/2026
	TENAYA CORPORATION /s/ Kristopher S. George Name: Kristopher S. George Title: Assistant Treasurer	03/23/2026
	** 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)

FAQ

What insider transaction did Rare Element Resources (REEMF) report on this Form 4?

Rare Element Resources reported that major shareholder entity Synchron executed an open-market purchase of 100,149,060 Common Shares. This filing records the transaction details and updated ownership rather than changing the company’s operating results or business strategy.

Who is Synchron in the Rare Element Resources (REEMF) insider filing?

The filing states that the Common Shares are held of record by Synchron, which is a wholly owned subsidiary of General Atomic Technologies Corporation, itself wholly owned by Tenaya Corporation. These entities are reported as greater-than-10% owners of Rare Element Resources.

How many Rare Element Resources (REEMF) shares does the reporting group hold after the transaction?

After the reported transaction, the filing shows Synchron directly holding 460,889,576 Common Shares of Rare Element Resources. This figure reflects the updated position after purchasing 100,149,060 shares, giving investors a snapshot of this shareholder group’s current recorded stake.

Was the Rare Element Resources (REEMF) Form 4 transaction a buy or a sell?

The Form 4 lists the transaction code as P, described as a purchase in open market or private transaction. The normalized data classifies it as a buy and explicitly labels the action as an open-market purchase of Common Shares rather than a sale.

Did the Rare Element Resources (REEMF) Form 4 involve derivatives or options?

The insider data indicates no derivative transactions in this filing, with derivativeTransactionCount reported as 0 and an empty derivativeSummary. The reported activity is limited to a single non-derivative transaction in Common Shares, simplifying the ownership picture for this holder group.