Key facts
- This page summarizes Denham Mining GP LLC's Form 3 filing for USA Rare Earth, Inc. (USAR).
- 0 reported transactions and 0 derivative rows are listed below.
- Accepted by SEC: 11 Sep 2026, 16:18.
Denham Mining GP LLC - 03 Sep 2026 Form 3 Insider Report for USA Rare Earth, Inc. (USAR)
- Reporting relationship
- 10%+ Owner
- Issuer ticker
- USAR
- Reported as of
- 03 Sep 2026
- Net transaction value
- $0
- Reporting owner signature
- Denham Mining GP LLC, By: /s/ Anthony Fiore, Managing Director
Source evidence
Original filing metadata and source links for verification.
3 source fields
Reporting owner
1 detail
Key filing fact
Denham Mining GP LLC filed Form 3 for USA Rare Earth, Inc. (USAR) on 11 Sep 2026.
Change
- No earlier filing in this sequence is available for direct comparison.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Official SEC source
View source filing
Ownership activity is grounded in SEC Form 3 disclosures.
Reporting Owners (6)
CIK 0002151490
Primary reporting owner
Denham Mining GP LLC
- Relationship
- 10%+ Owner
- Address
- C/O DENHAM CAPITAL MANAGEMENT LP, 185 DARTMOUTH STREET, 7TH FLOOR, BOSTON
- Signature
- Denham Mining GP LLC, By: /s/ Anthony Fiore, Managing Director
- Signature date
- 11 Sep 2026
CIK 0002151491
Denham Mining GP LP
- Relationship
- 10%+ Owner
- Address
- C/O DENHAM CAPITAL MANAGEMENT LP, 185 DARTMOUTH STREET, 7TH FLOOR, BOSTON
- Signature
- Denham Mining GP LP, By: Denham Mining GP LLC, its general partner, By: /s/ Anthony Fiore, Managing Director
- Signature date
- 11 Sep 2026
CIK 0001698097
Denham Mining Fund LP
- Relationship
- 10%+ Owner
- Address
- C/O DENHAM CAPITAL MANAGEMENT LP, 185 DARTMOUTH STREET, 7TH FLOOR, BOSTON
- Signature
- Denham Mining Fund LP, By: Denham Mining GP LP, its general partner, By: Denham Mining GP LLC, its general partner, By: /s/ Anthony Fiore, Managing Director
- Signature date
- 11 Sep 2026
CIK 0002151494
Pembroke Resources II Holdings (Cayman) LLC
- Relationship
- 10%+ Owner
- Address
- C/O DENHAM CAPITAL MANAGEMENT LP, 185 DARTMOUTH STREET, 7TH FLOOR, BOSTON
- Signature
- Pembroke Resources II Holdings (Cayman) LLC, By: /s/ Anthony Fiore, Vice President & Secretary, Managing Director
- Signature date
- 11 Sep 2026
CIK 0002151474
MVB Investment Holdings LLC
- Relationship
- 10%+ Owner
- Address
- C/O DENHAM CAPITAL MANAGEMENT LP, 185 DARTMOUTH STREET, 7TH FLOOR, BOSTON
- Signature
- MVB Investment Holdings LLC, By: /s/ Anthony Fiore, Vice President & Secretary, Manager on the Board of Managers
- Signature date
- 11 Sep 2026
CIK 0002151486
Serra Verde Rare Earths Ltd.
- Relationship
- 10%+ Owner
- Address
- C/O DENHAM CAPITAL MANAGEMENT LP, 185 DARTMOUTH STREET, 7TH FLOOR, BOSTON
- Signature
- Serra Verde Rare Earths Ltd., By: /s/ Anthony Fiore, Director
- Signature date
- 11 Sep 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
USAR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 46,809,526
- Date
- 03 Sep 2026
- Ownership
- See Footnote
- Footnotes
- F1, F3, F4
USAR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 46,809,526
- Date
- 03 Sep 2026
- Ownership
- See Footnote
- Footnotes
- F1, F3, F4
USAR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 46,809,526
- Date
- 03 Sep 2026
- Ownership
- See Footnote
- Footnotes
- F1, F3, F4
USAR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 46,809,526
- Date
- 03 Sep 2026
- Ownership
- See Footnote
- Footnotes
- F1, F3, F4
USAR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 46,809,526
- Date
- 03 Sep 2026
- Ownership
- See Footnote
- Footnotes
- F1, F3, F4
USAR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 46,809,526
- Date
- 03 Sep 2026
- Ownership
- See Footnote
- Footnotes
- F1, F3, F4
USAR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 152,640
- Date
- 03 Sep 2026
- Ownership
- See Footnote
- Footnotes
- F2, F3, F4
USAR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 152,640
- Date
- 03 Sep 2026
- Ownership
- See Footnote
- Footnotes
- F2, F3, F4
USAR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 152,640
- Date
- 03 Sep 2026
- Ownership
- See Footnote
- Footnotes
- F2, F3, F4
USAR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 152,640
- Date
- 03 Sep 2026
- Ownership
- See Footnote
- Footnotes
- F2, F3, F4
USAR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 152,640
- Date
- 03 Sep 2026
- Ownership
- See Footnote
- Footnotes
- F2, F3, F4
USAR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 152,640
- Date
- 03 Sep 2026
- Ownership
- See Footnote
- Footnotes
- F2, F3, F4
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 4 footnotes
Footnote F1
These securities are directly held by Serra Verde Rare Earths Ltd.
Footnote F2
These securities are directly held MVB Investment Holdings LLC.
Footnote F3
Serra Verde Rare Earths Ltd. is majority owned by MVB Investment Holdings LLC, whose sole owner is Pembroke Resources II Holdings (Cayman) LLC, whose sole owner is Denham Mining Fund LP. The general partner of Denham Mining Fund LP is Denham Mining GP LP, whose general partner is Denham Mining GP LLC. Each of the Reporting Persons disclaims beneficial ownership over the shares of Common Stock reported herein, except to the extent of their respective pecuniary interest therein, if any, and the filing of this report shall not be deemed an admission that any of the Reporting Persons is the beneficial owner of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.
Footnote F4
Each of Stuart D. Porter, Carl J. Tricoli, and Robert G. Still is a manager and director of Denham Mining GP LLC, but, in reliance on the "rule of three," each disclaims beneficial ownership over the securities directly held by Serra Verde Rare Earths Ltd. and MVB Investment Holdings LLC.