Skip to content
Baker Capital StrategiesMARKETS. FILINGS. PERSPECTIVE.
Powered by THEMA

Baker Capital Strategies

Free Registration

Register for access to news, tools, alerts and reports.

THEMA Basic included at launch.

Use at least 8 characters.

BCS

Beneficial Ownership Report · SCHEDULE 13D/A

Tamboran Resources Corporation

Beneficial Ownership Report

Filed Sep 29, 2026Accepted Sep 29, 2026, 8:48 PM EDTFiling CIK 1997652Accession 0001193125-26-408033
Share

Structured filing — SCHEDULE 13D/A

primary_doc.xml

Open full document ↗

Amendment · This filing reports the amendment as submitted.

Subject company

Company
Tamboran Resources Corporation
Company CIK
0001997652
Street
Suite 01, Level 39, Tower One, I.T.S.
Street (continued)
100 Barangaroo Avenue
City
New South Wales
State / country code
C3
Postal code
2000

Statement details

Amendment number
7
Security class
Common Stock, par value $0.001 per share
Event date
09/25/2026
Previously filed indication
false

Authorized notification person 1

Name
Bryan Sheffield
Phone
737-304-7803
Street
300 Colorado Street
Street (continued)
Suite 1900
City
Austin
State / country code
TX
Postal code
78701

Reporting person 1

Name
Bryan Sheffield
Reporting person CIK
0001606914
No reporting person CIK indication
N
Citizenship / organization
X1
Reporting person type
IN
Source of funds code
OO
Legal proceedings indication
N
Aggregate amount owned
3,646,756.00
Percent of class
10.4
Sole voting power
183,655.00
Shared voting power
3,463,101.00
Sole dispositive power
183,655.00
Shared dispositive power
3,463,101.00
Aggregate excludes certain shares
N

Reporting person 2

Name
Sheffield Holdings, LP
Reporting person CIK
0002027828
No reporting person CIK indication
N
Citizenship / organization
TX
Reporting person type
PN
Source of funds code
OO
Legal proceedings indication
N
Aggregate amount owned
2,586,904.00
Percent of class
7.4
Sole voting power
0.00
Shared voting power
2,586,904.00
Sole dispositive power
0.00
Shared dispositive power
2,586,904.00
Aggregate excludes certain shares
N

Reporting person 3

Name
Spraberry Interests, LLC
Reporting person CIK
0002027822
No reporting person CIK indication
N
Citizenship / organization
DE
Reporting person type
OO
Source of funds code
OO
Legal proceedings indication
N
Aggregate amount owned
2,586,904.00
Percent of class
7.4
Sole voting power
0.00
Shared voting power
2,586,904.00
Sole dispositive power
0.00
Shared dispositive power
2,586,904.00
Aggregate excludes certain shares
N

Reporting person 4

Name
Daly Waters Energy, LP
Reporting person CIK
0002027837
No reporting person CIK indication
N
Citizenship / organization
DE
Reporting person type
PN
Source of funds code
OO
Legal proceedings indication
N
Aggregate amount owned
876,197.00
Percent of class
2.5
Sole voting power
0.00
Shared voting power
876,197.00
Sole dispositive power
0.00
Shared dispositive power
876,197.00
Aggregate excludes certain shares
N

Reporting person 5

Name
Formentera Australia Fund I GP, LP
Reporting person CIK
0002027922
No reporting person CIK indication
N
Citizenship / organization
DE
Reporting person type
PN
Source of funds code
OO
Legal proceedings indication
N
Aggregate amount owned
876,197.00
Percent of class
2.5
Sole voting power
0.00
Shared voting power
876,197.00
Sole dispositive power
0.00
Shared dispositive power
876,197.00
Aggregate excludes certain shares
N

Reporting person 6

Name
Formentera Investments LLC
Reporting person CIK
0002027820
No reporting person CIK indication
N
Citizenship / organization
DE
Reporting person type
OO
Source of funds code
OO
Legal proceedings indication
N
Aggregate amount owned
876,197.00
Percent of class
2.5
Sole voting power
0.00
Shared voting power
876,197.00
Sole dispositive power
0.00
Shared dispositive power
876,197.00
Aggregate excludes certain shares
N

Item 1

Issuer

Tamboran Resources Corporation

Security title

Common Stock, par value $0.001 per share

Principal address

Comment

This Amendment No. 7 ("Amendment No. 7") amends and supplements the statement on Schedule 13D filed by the undersigned on July 8, 2024 (the "Original Schedule 13D"), as amended by Amendment No. 1 filed on May 14, 2025 ("Amendment No. 1"), Amendment No. 2 filed on July 23, 2025 ("Amendment No. 2"), Amendment No. 3 filed on July 29, 2025 ("Amendment No. 3"), Amendment No. 4 filed on November 17, 2025 ("Amendment No. 4"), Amendment No. 5 filed on February 13, 2026 ("Amendment No. 5"), and Amendment No. 6 filed on April 14, 2026 ("Amendment No. 6", together with the Original Schedule 13D, Amendment No. 1, Amendment No. 2, Amendment No. 3, Amendment No. 4 and Amendment No. 5, the "Schedule 13D") as specifically set forth herein. Amendment No. 7 is filed by (i) Bryan Sheffield, (ii) Sheffield Holdings, LP, a Texas limited partnership ("Sheffield Holdings"), (iii) Spraberry Interests, LLC, a Delaware limited liability company ("Spraberry"), (iv) Daly Waters Energy, LP, a Delaware limited partnership ("Daly Waters"), (v) Formentera Australia Fund I GP, LP, a Delaware limited partnership ("Formentera Australia"), and (vi) Formentera Investments LLC, a Delaware limited liability company ("Formentera Investments"), (each, a "Reporting Person" and, collectively, the "Reporting Persons"), relating to the shares of the common stock, par value $0.001 per share (the "Common Stock"), of Tamboran Resources Corporation, a Delaware corporation (the "Issuer"). Capitalized terms used herein and not otherwise defined in this Amendment No. 7 have the meanings set forth in the Schedule 13D.

Item 5

Number of shares

The information set forth in Items 7-10 on each of the cover pages of this Amendment No. 7 are incorporated by reference into this Item 5(b). References herein to percentage ownerships of Common Stock are based on 34,960,006 shares of Common Stock of the Issuer issued and outstanding as of September 23, 2026, as set forth in the Issuer's Annual Report on Form 10-K for the year ended June 30, 2026, which was filed with the Commission on September 25, 2026. In this regard, this Amendment No. 7 is being filed to report a greater than 1% decrease in certain of the Reporting Persons' beneficial ownership that was due solely to the increase in outstanding shares of Common Stock as disclosed by the Issuer.

Transactions

Except as otherwise disclosed in this Amendment No. 7, the Reporting Persons have effected no transactions in Common Stock within the prior 60 days.

Other persons with an interest

None

Date ownership ceased to exceed 5%

N/A

Percentage of class

Item 5 of the Schedule 13D is hereby amended and restated in its entirety as follows: The information set forth in Item 11 and Item 13 on each of the cover pages of this Amendment No. 7 are incorporated by reference into this Item 5(a). Sheffield Holdings is the record holder of 2,586,904 shares of Common Stock. Spraberry is the general partner of Sheffield Holdings. Bryan Sheffield is the manager of Spraberry. As a result, each of Mr. Sheffield and Spraberry may be deemed to share beneficial ownership of the shares held directly by Sheffield Holdings. In addition to the shares held by Sheffield Holdings, Mr. Sheffield, as investment trustee, may be deemed to beneficially own shares held by the Bryan S. Sheffield Spousal Lifetime Access Trust ("BSS SLAT"). In this regard, after giving effect to closing of the Institutional Entitlement Offer (as defined below), BSS SLAT is the record holder of 183,655 shares of Common Stock. Daly Waters is the record holder of 876,197 shares of Common Stock. Formentera Australia is the general partner of Daly Waters. Formentera Investments is the general partner of Formentera Australia. Bryan Sheffield is the managing member of Formentera Investments. As a result, each of Mr. Bryan Sheffield, Formentera Australia and Formentera Investments may be deemed to share beneficial ownership of the shares held directly by Daly Waters.

Signature comments

Sheffield Holdings, LP By: Spraberry Interests, LLC, its general partner Daly Waters Energy, LP By: Formentera Australia Fund I GP, LP, its general partner By: Formentera Investments LLC, its general partner Formentera Australia Fund I GP, LP By: Formentera Investments LLC, its general partner

Signature 1

Reporting person
Bryan Sheffield
Signed
/s/ Bryan Sheffield
Title
Bryan Sheffield
Date
09/29/2026

Signature 2

Reporting person
Sheffield Holdings, LP
Signed
/s/ Bryan Sheffield
Title
Bryan Sheffield / Manager
Date
09/29/2026

Signature 3

Reporting person
Spraberry Interests, LLC
Signed
/s/ Bryan Sheffield
Title
Bryan Sheffield / Manager
Date
09/29/2026

Signature 4

Reporting person
Daly Waters Energy, LP
Signed
/s/ Bryan Sheffield
Title
Bryan Sheffield / Managing Member
Date
09/29/2026

Signature 5

Reporting person
Formentera Australia Fund I GP, LP
Signed
/s/ Bryan Sheffield
Title
Bryan Sheffield / Managing Member
Date
09/29/2026

Signature 6

Reporting person
Formentera Investments LLC
Signed
/s/ Bryan Sheffield
Title
Bryan Sheffield / Managing Member
Date
09/29/2026

Company context

Tamboran Resources Corporation (NYSE/ASX: TBN) is a growth-driven independent natural gas exploration and production company focused on an integrated approach to the commercial development of the natural gas resources in the Beetaloo Basin located within the Northern Territory of Australia. Through its subsidiaries, Tamboran holds approximately 1.9 million net prospective acres and is the largest acreage holder in the Beetaloo Basin.

Current securities

Recent company filings

  1. 10-K filingSep 25, 2026
  2. Results of Operations and Financial ConditionSep 25, 2026
  3. Regulation FD DisclosureAug 31, 2026
  4. Financial Statements and ExhibitsAug 7, 2026
  5. S-8 filingJun 8, 2026

Privacy choices

BCS measures page use with Google Analytics using regional consent settings. You can change your preference here. Charts and market data remain available.

Essential functions — always available. Security, navigation, registration and remembering these choices.

Audience analytics

Analytics cookies are off by default for visitors Google identifies in the EEA, UK or Switzerland until allowed. Limited measurement without analytics cookies may still occur under those regional defaults.

TradingView charts, quotes and the economic calendar load automatically as page content. TradingView receives network and browser information and may collect its own usage analytics. This choice controls BCS’s Google Analytics only.

Google advertising is not enabled. Direct sponsor links do not load advertising trackers on BCS.

Turning analytics off stops future Google Analytics activity here. It does not erase information already received by the provider. Read the privacy policy.