Bryan Sheffield - 28 May 2026 Form 4 Insider Report for Tamboran Resources Corp (TBN)

Reporting relationship: Director, 10%+ Owner
Issuer ticker: TBN
Reported as of: 28 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 29 Jul 2026, 18:19:46 UTC
Prior SEC filing: 16 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Bryan Sheffield

Key filing fact

Bryan Sheffield filed Form 4 for Tamboran Resources Corp (TBN) on 29 Jul 2026.

Key facts

This page summarizes Bryan Sheffield's Form 4 filing for Tamboran Resources Corp (TBN).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 29 Jul 2026, 18:19.

Change

Previous filing in this sequence was filed on 16 Apr 2026.
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

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (6)

CIK 0001606914 Primary reporting owner

Sheffield Bryan

Relationship: Director, 10%+ Owner
Address: 300 COLORADO STREET, SUITE 1900, AUSTIN
Signature: /s/ Bryan Sheffield
Signature date: 29 Jul 2026

CIK 0002027828

Sheffield Holdings, LP

Relationship: 10%+ Owner
Address: 300 COLORADO STREET, SUITE 1900, AUSTIN
Signature: Sheffield Holdings, LP, By: Spraberry Interests, LLC, its general partner, By: /s/ Bryan Sheffield, President
Signature date: 29 Jul 2026

CIK 0002027822

Spraberry Interests, LLC

Relationship: 10%+ Owner
Address: 300 COLORADO STREET, SUITE 1900, AUSTIN
Signature: Spraberry Interests, LLC, By: /s/ Bryan Sheffield, Manager
Signature date: 29 Jul 2026

CIK 0002027837

Daly Waters Energy, LP

Relationship: 10%+ Owner
Address: 300 COLORADO STREET, SUITE 1900, AUSTIN
Signature: Daly Waters Energy, LP, By: Formentera Australia Fund I GP, LP, its general partner, By: Formentera Investments LLC, its general partner, By: /s/ Bryan Sheffield, Managing Member
Signature date: 29 Jul 2026

CIK 0002027922

Formentera Australia Fund I GP, LP

Relationship: 10%+ Owner
Address: 300 COLORADO STREET, SUITE 1900, AUSTIN
Signature: Formentera Australia Fund I GP, LP, its general partner, By: Formentera Investments LLC, its general partner, By: /s/ Bryan Sheffield, Managing Member
Signature date: 29 Jul 2026

CIK 0002027820

Formentera Investments LLC

Relationship: 10%+ Owner
Address: 300 COLORADO STREET, SUITE 1900, AUSTIN
Signature: Formentera Investments LLC, By: /s/ Bryan Sheffield, Managing Member
Signature date: 29 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

TBN transaction

Common Stock

Award

Transaction value
Shares: +339,500
Change %: +10%
Price
Shares after: 3,646,756
Date: 28 May 2026
Ownership: See footnote
Footnotes: F1, F2, F3

TBN transaction

Common Stock

Award

Transaction value
Shares: +339,500
Change %: +10%
Price
Shares after: 3,646,756
Date: 28 May 2026
Ownership: See footnote
Footnotes: F1, F2, F3

TBN transaction

Common Stock

Award

Transaction value
Shares: +339,500
Change %: +10%
Price
Shares after: 3,646,756
Date: 28 May 2026
Ownership: See footnote
Footnotes: F1, F2, F3

TBN transaction

Common Stock

Award

Transaction value
Shares: +339,500
Change %: +10%
Price
Shares after: 3,646,756
Date: 28 May 2026
Ownership: See footnote
Footnotes: F1, F2, F3

TBN transaction

Common Stock

Award

Transaction value
Shares: +339,500
Change %: +10%
Price
Shares after: 3,646,756
Date: 28 May 2026
Ownership: See footnote
Footnotes: F1, F2, F3

TBN transaction

Common Stock

Award

Transaction value
Shares: +339,500
Change %: +10%
Price
Shares after: 3,646,756
Date: 28 May 2026
Ownership: See footnote
Footnotes: F1, F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

The shares were issued to Sheffield Holdings, LP ("Sheffield Holdings") in exchange for common shares of Falcon Oil & Gas Ltd. ("Falcon") held by Sheffield Holdings, at an exchange ratio of 0.00687 shares of Tamboran Resources Corporation ("Tamboran") common stock for each Falcon common share, pursuant to an Arrangement Agreement, dated as of September 30, 2025, by and among Tamboran, Tamboran (Beetaloo) Pty Ltd, Tamboran Resources Investments Holding Corporation and Falcon, as amended by that certain Amending Agreement dated as of March 31, 2026, (collectively, the "Arrangement Agreement"). The Arrangement Agreement was subject to certain customary closing conditions. The closing conditions were satisfied and the Arrangement Agreement closed on May 28, 2026. No cash purchase price was paid by Sheffield Holdings for the shares of Tamboran common stock received in the exchange.

Footnote F2

Represents 2,586,904 securities held directly by Sheffield Holdings, 876,197 securities held directly by Daly Waters Energy, LP ("Daly Waters"), and 183,655 securities held directly by Bryan S. Sheffield Spousal Lifetime Access Trust. Spraberry Interests, LLC ("Spraberry Interests") is the general partner of Sheffield Holdings. Bryan Sheffield is the manager of Spraberry Interests. As a result, each of Mr. Sheffield and Spraberry Interests may be deemed to share beneficial ownership of the shares held directly by Sheffield Holdings. Formentera Australia Fund I GP, LP ("Formentera Australia") is the general partner of Daly Waters. Formentera Investments LLC ("Formentera Investments") is the general partner of Formentera Australia. Bryan Sheffield is the managing member of Formentera Investments.

Footnote F3

(Continued from footnote 2) As a result, each of Mr. Sheffield, Formentera Australia and Formentera Investments may be deemed to share beneficial ownership of the shares held directly by Daly Waters. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of its or his pecuniary interest therein, if any.