# EDGAR Filing Document

**Accession Number:** 0001419806
**File Stem:** 0001140361-26-009293
**Filing Date:** 2026-3
**Character Count:** 14432
**Document Hash:** 9c311531828c4081ad245019e39ec387
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-009293.hdr.sgml**: 20260313

**ACCESSION NUMBER**: 0001140361-26-009293

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260313

**DATE AS OF CHANGE**: 20260313

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** RARE ELEMENT RESOURCES LTD
- **CENTRAL INDEX KEY:** 0001419806
- **STANDARD INDUSTRIAL CLASSIFICATION:** GOLD & SILVER ORES [1040]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 000000000
- **STATE OF INCORPORATION:** A1
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-88819
- **FILM NUMBER:** 26749955

**BUSINESS ADDRESS:**
- **STREET 1:** P.O. BOX 271049
- **CITY:** LITTLETON
- **STATE:** CO
- **ZIP:** 80127
- **BUSINESS PHONE:** 720-278-2460

**MAIL ADDRESS:**
- **STREET 1:** P.O. BOX 271049
- **CITY:** LITTLETON
- **STATE:** CO
- **ZIP:** 80127
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BLUE JAMES N
- **CENTRAL INDEX KEY:** 0001158423

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 5)**

**Rare Element Resources Ltd.**

*(Name of Issuer)*

**Common Stock**

*(Title of Class of Securities)*

**75381M151**

*(CUSIP Number)*

**Rhys Williams**<br>Synchron<br>3550 General Atomics Court<br>San Diego CA 92121-1122<br>(858) 455-2640

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**03/10/2026**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **75381M151** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Synchron** | Name of reporting person<br>**Synchron** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**CALIFORNIA** | Citizenship or place of organization<br>**CALIFORNIA** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**460889576.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**460889576.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**460889576.00** | Aggregate amount beneficially owned by each reporting person<br>**460889576.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**71.4%** | Percent of class represented by amount in Row (11)<br>**71.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

| **CUSIP No.** | **75381M151** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**General Atomic Technologies Corporation** | Name of reporting person<br>**General Atomic Technologies Corporation** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**WYOMING** | Citizenship or place of organization<br>**WYOMING** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**460889576.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**460889576.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**460889576.00** | Aggregate amount beneficially owned by each reporting person<br>**460889576.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**71.4%** | Percent of class represented by amount in Row (11)<br>**71.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

| **CUSIP No.** | **75381M151** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Tenaya Corporation** | Name of reporting person<br>**Tenaya Corporation** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**460889576.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**460889576.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**460889576.00** | Aggregate amount beneficially owned by each reporting person<br>**460889576.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**71.4%** | Percent of class represented by amount in Row (11)<br>**71.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

| **CUSIP No.** | **75381M151** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**James N. Blue** | Name of reporting person<br>**James N. Blue** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**AF** | Source of funds (See Instructions)<br>**AF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**460889576.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**460889576.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**460889576.00** | Aggregate amount beneficially owned by each reporting person<br>**460889576.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**71.4%** | Percent of class represented by amount in Row (11)<br>**71.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock

**(b) Name of Issuer:**
Rare Element Resources Ltd.

**(c) Address of Issuer's Principal Executive Offices:**
P.O. Box 80, Firestone, CO, 80520

This Amendment No. 5 (as defined below) amends and restates the Schedule 13D filed on October 2, 2017, as amended by the Schedule 13D/A previously filed on October 14, 2019, as further amended by the Schedule 13D/A filed on December 23, 2021, as further amended by the Schedule 13 D/A on March 19, 2024 and as further amended by the Schedule 13D/A filed on June 28, 2024 (the "Existing Schedule 13D"). The Existing Schedule 13D and this Amendment No. 5 are collectively referred to herein as the "Schedule 13D". Capitalized terms used but not defined in this Amendment No. 5 shall have the meanings given to them in the Existing Schedule 13D. The Existing Schedule 13D remains in full force and effect, except as specifically amended by this Amendment No. 5.

The class of equity securities to which this amendment to Schedule 13D (this "Amendment No. 5") relates is the Common Shares, no par value, of Rare Element Resources Ltd., a British Columbia corporation (the "Issuer"). The Issuer's principal executive offices are P.O. Box 80, Firestone, Colorado 80520.

**Item 4. Purpose of Transaction**

See Item 3 above.

**Item 5. Interest in Securities of the Issuer**

**(a)**
(a)-(b) Synchron is the beneficial owner of 460,889,576 Common Shares of the Issuer, including 26,650,000 Acquired Shares (which were issued in connection with the Investment Agreement transaction described in the Existing Schedule 13D), 24,175,000 Option Shares (which were issued in connection with the 2019 Option Exercise), 65,531,925 Common Shares acquired in the 2021 Rights Offering, 244,383,591 Common Shares acquired in the 2024 Rights Offering and 100,149,060 Common Shares acquired in the 2026 Rights Offering, constituting, in the aggregate, approximately 71.4% of the Common Shares of the Issuer assuming (i) 516,134,712 Common Shares of the Issuer issued and outstanding as of January 30, 2026 (as disclosed in the Prospectus Supplement) and (ii) 129,033,678 Common Shares of the Issuer were issued in connection with the 2026 Rights Offering (as contemplated by the Prospectus Supplement). Synchron has the sole voting and dispositive power over the Acquired Shares, the Option Shares, the Common Shares acquired in the 2021 Rights Offering, the Common Shares acquired in the 2024 Rights Offering and the Common Shares acquired in the 2026 Rights Offering.

Because each of General Atomic Technologies Corporation, Tenaya and Mr. Blue may be deemed to control Synchron, each of General Atomic Technologies Corporation, Tenaya and Mr. Blue may be deemed to beneficially own, and to have the power to vote or direct the vote, or dispose or direct the disposition of, all of the Common Shares beneficially owned by Synchron.

The filing of this Schedule 13D should not be construed as an admission that any Reporting Person is the beneficial owner of any of the shares of Common Shares that such Reporting Person may be deemed to beneficially own.

**(b)**
—

**(c)**
Other than the transactions described Item 3 above, the Reporting Persons have not been involved in any transactions involving the securities of the Issuer in the last 60 days.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

Item 6 of Amendment No. 4 is hereby incorporated by reference in its entirety.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Synchron

**Signature:** /s/ Kristopher S. George

**Name/Title:** Kristopher S. George/Assistant Treasurer

**Date:** 03/12/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** General Atomic Technologies Corporation

**Signature:** /s/ Kristopher S. George

**Name/Title:** Kristopher S. George/Assistant Treasurer

**Date:** 03/12/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Tenaya Corporation

**Signature:** /s/ Kristopher S. George

**Name/Title:** Kristopher S. George/Assistant Treasurer

**Date:** 03/12/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** James N. Blue

**Signature:** /s/ James N. Blue

**Name/Title:** James N. Blue

**Date:** 03/12/2026