# EDGAR Filing Document

**Accession Number:** 0001980088
**File Stem:** 0001213900-26-040477
**Filing Date:** 2026-4
**Character Count:** 41514
**Document Hash:** 7a664b8f73b593f0cafe4b056f4f2577
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-26-040477.hdr.sgml**: 20260406

**ACCESSION NUMBER**: 0001213900-26-040477

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20260406

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260406

**DATE AS OF CHANGE**: 20260406

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MACH NATURAL RESOURCES LP
- **CENTRAL INDEX KEY:** 0001980088
- **STANDARD INDUSTRIAL CLASSIFICATION:** CRUDE PETROLEUM & NATURAL GAS [1311]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41849
- **FILM NUMBER:** 26841421

**BUSINESS ADDRESS:**
- **STREET 1:** 14201 WIRELESS WAY, SUITE 300
- **CITY:** OKLAHOMA CITY
- **STATE:** OK
- **ZIP:** 73134
- **BUSINESS PHONE:** (405) 252-8100

**MAIL ADDRESS:**
- **STREET 1:** 14201 WIRELESS WAY, SUITE 300
- **CITY:** OKLAHOMA CITY
- **STATE:** OK
- **ZIP:** 73134

?xml version='1.0' encoding='ASCII'?

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**WASHINGTON, DC 20549**

**FORM 8-K**

**Current Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934**

**Date of report (Date of earliest event reported): April 6, 2026**

**Mach Natural Resources LP**

**(Exact name of registrant as specified in its charter)**

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-41849** | **93-1757616** |
| **(State or other jurisdiction<br> of incorporation)** | **(Commission File Number)** | **(IRS Employer<br> Identification No.)** |

---

---

| | |
|:---|:---|
| **14201 Wireless Way, Suite 300, Oklahoma City, Oklahoma** | **73134** |
| **(Address of principal executive offices)** | **(Zip Code)** |

---

**(405) 252-8100**

**Registrant's telephone number, including area code** 

**Not applicable.**

**(Former name or former address, if changed since last report.)**

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading Symbol** | **Name of exchange on which registered** |
| Common units representing limited partner interests | MNR | New York Stock Exchange |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☒

**EXPLANATORY NOTE**

As previously disclosed, on September 16, 2025, Mach Natural Resources LP (the "Company") completed the acquisition of (i) certain rights, title and interests in oil and gas properties, rights and related assets located in certain designated lands in the Permian Basin from Sabinal Energy Operating, LLC, Sabinal Resources, LLC and Sabinal CBP, LLC and (ii) 100% of the membership interests in SIMCOE LLC and Simlog LLC from VEPU Inc. and Simlog Inc. The Company is filing this Current Report on Form 8-K to provide certain unaudited pro forma financial information regarding the acquisitions in connection with the Registration Statement on Form S-3 filed by the Company with the U.S. Securities and Exchange Commission (the "Commission") on October 30, 2025 and declared effective by the Commission on December 12, 2025.

**Item 9.01. Financial Statements and Exhibits.**

 ****

***(b) Pro forma financial information.***

The unaudited pro forma condensed combined statements of operations for the year ended December 31, 2025 are filed herewith and attached hereto as Exhibit 99.1, and are incorporated herein by reference.

 **

***(d) Exhibits.***

 **

---

| | |
|:---|:---|
| **Exhibit No.** | **Description** |
| 99.1 | [Unaudited Pro Forma Condensed Combined Statement of Operations of Mach Natural Resources LP for the year ended December 31, 2025.](ea028516401ex99-1.htm) |
| 104 | Cover Page Interactive Data File (formatted as Inline XBRL). |

---

**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | | |
|:---|:---|:---|:---|
|  | **Mach Natural Resources LP** | **Mach Natural Resources LP** | **Mach Natural Resources LP** |
|  | By: | Mach Natural Resources GP LLC, | Mach Natural Resources GP LLC, |
|  |  | its general partner | its general partner |
| Dated: April 6, 2026 | By: | /s/ Tom L. Ward | /s/ Tom L. Ward |
|  |  | Name: | Tom L. Ward |
|  |  | Title: | Chief Executive Officer |

---

## Exhibit 99.1

**Exhibit 99.1**

**MACH NATURAL RESOURCES LP**

**Unaudited Pro Forma Condensed Combined Statement of Operations**

**Introduction**

Mach Natural Resources LP (the "Company") is a limited partnership focused on the acquisition, development and production of oil, natural gas and natural gas liquid ("NGL") reserves in the Anadarko Basin region of Western Oklahoma, Southern Kansas and the panhandle of Texas; the San Juan Basin region of New Mexico and Colorado; and the Permian Basin region of West Texas.

On July 9, 2025, the Company entered into a membership interest purchase agreement (the "IKAV Purchase Agreement") with VEPU Inc. and Simlog Inc. (collectively, the "IKAV Sellers"), pursuant to which the Company would acquire one hundred percent (100%) of the IKAV Sellers' membership interests in certain rights, titles and interests in oil and gas properties, rights and related assets located in certain designated lands in the San Juan Basin of New Mexico and Colorado. Specifically, the Company acquired 100% of the membership interests of SIMCOE LLC ("SIMCOE") and Simlog LLC from VEPU Inc. and Simlog Inc, respectively. Simlog LLC owns 100% of the issued and outstanding equity interests of SJ INVESTMENT OPPS LLC ("SJ" and together with SIMCOE, the "IKAV Companies"), which represents substantially all of Simlog LLC. On September 16, 2025, the Company entered into that certain First Amendment to the IKAV Purchase Agreement (the "IKAV Purchase Agreement Amendment" and together with the IKAV Purchase Agreement, the "IKAV MIPA").

On September 16, 2025, the Company acquired the IKAV Companies, pursuant to the IKAV MIPA, for consideration of approximately $759.6 million comprising (i) $349.8 million in cash and (ii) 30.6 million common units of the Company (the "IKAV Unit Consideration"), subject to certain customary post-close adjustments (such transaction, the "IKAV Acquisition"). The IKAV Unit Consideration has a value of approximately $409.9 million.

On July 9, 2025, the Company entered into a Purchase and Sale Agreement (the "Sabinal PSA") with Sabinal Energy Operating, LLC, Sabinal Resources, LLC and Sabinal CBP, LLC (collectively, the "Sabinal Sellers"), pursuant to which the Company would acquire certain oil and gas assets located in certain designated lands in the Permian Basin (the "Sabinal Assets").

On September 16, 2025, the Company acquired the Sabinal Assets, pursuant to the Sabinal PSA, for consideration of approximately $448.0 million comprising (i) $194.1 million in cash and (ii) 19.0 million common units (the "Sabinal Unit Consideration"), subject to certain customary post-close adjustments (such transaction, the "Sabinal Acquisition" and together with the IKAV Acquisition, the "Transactions"). The Sabinal Unit Consideration has a value of approximately $253.9 million.

The unaudited pro forma condensed combined statement of operations (the "pro forma statement of operations") has been prepared in accordance with Article 11 of Regulation S-X, Pro Forma Financial Information, using assumptions set forth in the notes to the unaudited pro forma statement of operations. The following pro forma statement of operations reflects the historical results of the Company, SIMCOE, SJ, and Sabinal Energy Operating, LLC and subsidiaries ("Sabinal") on a pro forma basis to give effect to the Transactions, which are described in further detail below, as if they had occurred on January 1, 2025:

&nbsp;&nbsp;&nbsp;&nbsp;1. The consummation of the IKAV Acquisition pursuant to the
terms of the IKAV MIPA.

&nbsp;&nbsp;&nbsp;&nbsp;2. The consummation of the Sabinal Acquisition pursuant to the
terms of the Sabinal PSA.

&nbsp;&nbsp;&nbsp;&nbsp;3. The entrance into the First Amendment to the Company's
credit agreement as further described in "Note 1 – Basis of Pro Forma Presentation" included elsewhere in the notes
to the pro forma statement of operations.

The pro forma adjustments are based on currently available information which is considered preliminary and is based on certain estimates and assumptions. Therefore, the actual adjustments may differ from the pro forma adjustments. However, management believes that the assumptions provide a reasonable basis for presenting the significant effects of the Transactions as contemplated and the pro forma adjustments give appropriate effect to those assumptions and are properly applied in the pro forma statement of operations. The Company has not included any adjustments depicting synergies or dis-synergies of the Transactions.

The pro forma statement of operations and related notes are presented for illustrative purposes only. If the Transactions had occurred in the past, the Company's operating results might have been materially different from those presented in the pro forma statement of operations. The pro forma statement of operations should not be relied upon as an indication of operating results that the Company would have achieved if the IKAV Acquisition and the Sabinal Acquisition had taken place on the date specified. In addition, future results may vary significantly from the results reflected in the pro forma statement of operations and should not be relied upon as an indication of the future results the Company.

**MACH NATURAL RESOURCES LP**

**Unaudited Pro Forma Condensed Combined Statement of Operations**

**For the Year Ended December 31, 2025**

**(in thousands, except per unit data)**

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
|  | **Mach Natural<br> Resources LP <br> (Historical)** | **IKAV Companies <br> As Adjusted<br> (See Note 4)** | **Sabinal Assets <br> As Adjusted<br> (See Note 5)** | **Transaction<br> Accounting<br> Adjustments <br> (Pro Forma)** | **Mach Natural<br> Resources LP<br> Combined <br> (Pro Forma)** |
| Revenue |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Oil, natural gas, and NGL sales | $1037650 | $197153 | $171865 | $— | $1406668 |
| &nbsp;&nbsp;&nbsp;Gain (loss) on oil and natural gas derivatives | 81289 | 676 |  |  | 81965 |
| &nbsp;&nbsp;&nbsp;Midstream revenue | 27561 | 11366 |  |  | 38927 |
| &nbsp;&nbsp;&nbsp;Product sales | 28890 |  |  |  | 28890 |
| &nbsp;&nbsp;&nbsp;Gas off-take agreement amortization |  | 14654 |  | (14654) (a) |  |
| &nbsp;&nbsp;&nbsp;Other revenues |  | 337 |  |  | 337 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total revenues | 1175390 | 224186 | 171865 | (14654) | 1556787 |
| Operating expenses |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Gathering and processing | 138836 | 38094 |  |  | 176930 |
| &nbsp;&nbsp;&nbsp;Lease operating expense | 263793 | 78361 | 66700 |  | 408854 |
| &nbsp;&nbsp;&nbsp;Production taxes | 48761 | 17937 | 13501 |  | 80199 |
| &nbsp;&nbsp;&nbsp;Midstream operating expense | 13319 |  |  |  | 13319 |
| &nbsp;&nbsp;&nbsp;Cost of product sales | 25901 |  |  |  | 25901 |
| &nbsp;&nbsp;&nbsp;Depreciation, depletion, amortization and accretion – oil and natural gas | 280459 | 63031 |  | 19913 (b) | 363403 |
| &nbsp;&nbsp;&nbsp;Depreciation and amortization – other | 12305 | 1382 |  | 3696 (c) | 17383 |
| &nbsp;&nbsp;&nbsp;General and administrative | 49236 | 27507 |  |  | 76743 |
| &nbsp;&nbsp;&nbsp;General and administrative – related party | 7400 |  |  |  | 7400 |
| &nbsp;&nbsp;&nbsp;Impairment of oil and gas properties | 90430 |  |  |  | 90430 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total operating expenses | 930440 | 226312 | 80201 | 23609 | 1260562 |
| Income (loss) from operations | 244950 | (2126) | 91664 | (38263) | 296225 |
| Other (expense) income |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Interest expense | (72219) | (13642) |  | (23100) (d) | (108961) |
| &nbsp;&nbsp;&nbsp;Loss on debt extinguishment | (18540) |  |  |  | (18540) |
| &nbsp;&nbsp;&nbsp;Other income (expense), net | (11207) | 25 |  |  | (11182) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total other expense | (101966) | (13617) |  | (23100) | (138683) |
| Net income (loss) | $142984 | $(15743) | $91664 | $(61363) | $157542 |
| Net income per common unit: |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Basic | $1.09 |  |  | $(0.14) (f) | $0.95 |
| &nbsp;&nbsp;&nbsp;Diluted | $1.09 |  |  | $(0.15) (f) | $0.94 |
| Weighted average common units outstanding: |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Basic | 131455 |  |  | 35200 (e) | 166655 |
| &nbsp;&nbsp;&nbsp;Diluted | 131537 |  |  | 35200 (e) | 166737 |

---

*The accompanying notes are an integral part of this unaudited pro forma condensed combined statement of operations.*

**MACH NATURAL RESOURCES LP**

**NOTES TO UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS**

**Note 1 – Basis of Pro Forma Presentation**

The historical financial information included herein is derived from the financial statements of the Company, the IKAV Companies and Sabinal. For purposes of the pro forma statements of operations, it is assumed that each of the Transactions took place on January 1, 2025.

The pro forma statement of operations reflects i) the consummation of the IKAV Acquisition pursuant to the terms of the IKAV MIPA, ii) the consummation of the Sabinal Acquisition pursuant to the terms of the Sabinal PSA and iii) the entrance in the First Amendment to the Company's credit agreement.

In conjunction with the closing of the Transactions, the First Amendment to the Company's credit agreement provided for an increase to the in the borrowing base of $700.0 million and established an aggregate term loan commitment amount of $450.0 million, which was fully funded in connection with the closing of the Transactions. The Company's term loan bears interest at a rate equal to Term SOFR plus a margin of 4.00% per annum.

The pro forma statement of operations reflects pro forma adjustments that are based on available information and certain assumptions that management believes are reasonable. However, actual results may differ from those reflected in these statements. In management's opinion, all adjustments known to date that are necessary to fairly present the pro forma information have been made. The pro forma statement of operations does not purport to represent what the combined entity's results of operations would have been if the Transactions had actually occurred on January 1, 2025, nor are they indicative of the Company's future results of operations.

This pro forma statement of operations should be read in conjunction with the historical financial statements for the year ended December 31, 2025 included in the Company's Annual Report on Form 10-K , as well as the historical financial statements of the IKAV Companies and Sabinal included in previous 8-K filings.

**Note 2 – Purchase Price Allocations**

The IKAV Acquisition was accounted for as a business combination, under the acquisition method, as the Company obtained control of a business by obtaining the legal right to use and develop the oil and natural gas properties included in the IKAV MIPA, as well as additional oil and gas related assets that can be used to enhance the value of the business. The allocation of the purchase price for the IKAV Acquisition was based upon management's estimates of and assumptions related to the fair value of assets acquired and liabilities assumed using available information.

The table below reflects the fair value estimates of the assets acquired and liabilities assumed as of the acquisition date. Below is a reconciliation of the assets acquired and liabilities assumed (in thousands, except unit data):

---

| | |
|:---|:---|
|  | **IKAV<br> Acquisition** |
| **Consideration transferred:** | |
| Common units issued | 30611264 |
| Closing price of common units on September 15, 2025 | $13.39 |
| Equity consideration | $409885 |
| Cash consideration | 349763 |
| **Total acquisition consideration** | $759648 |
| **Assets acquired:** |  |
| &nbsp;&nbsp;&nbsp;Proved oil and natural gas properties | $767840 |
| &nbsp;&nbsp;&nbsp;Accounts receivable | 60367 |
| &nbsp;&nbsp;&nbsp;Short-term derivative assets | 5470 |
| &nbsp;&nbsp;&nbsp;Inventories | 14134 |
| &nbsp;&nbsp;&nbsp;Other current assets | 13885 |
| &nbsp;&nbsp;&nbsp;Other property, plant and equipment | 101563 |
| &nbsp;&nbsp;&nbsp;Other assets | 3843 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total assets acquired | 967102 |
| **Liabilities assumed:** |  |
| &nbsp;&nbsp;&nbsp;Outstanding checks in excess of bank balance | 1574 |
| &nbsp;&nbsp;&nbsp;Accounts payable and accrued liabilities | 92834 |
| &nbsp;&nbsp;&nbsp;Revenue payable | 16407 |
| &nbsp;&nbsp;&nbsp;Other current liabilities | 331 |
| &nbsp;&nbsp;&nbsp;Asset retirement obligations | 86948 |
| &nbsp;&nbsp;&nbsp;Long-term derivative liabilities | 2187 |
| &nbsp;&nbsp;&nbsp;Other long-term liabilities | 7173 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total liabilities assumed | 207454 |
| **Net assets acquired** | $759648 |

---

The Sabinal Acquisition was accounted for as an asset acquisition as substantially all of the gross fair value of the Sabinal Assets was concentrated in proved oil and natural gas properties, which were considered to be a group of similar identifiable assets. The allocation of the purchase price for the Sabinal Acquisition was based upon management's estimates of and assumptions related to the fair value of assets acquired and liabilities assumed using available information.

The table below reflects the fair value estimates of the assets acquired and liabilities assumed as of the acquisition date. Below is a reconciliation of the assets acquired and liabilities assumed (in thousands, except unit data):

---

| | |
|:---|:---|
|  | **Sabinal<br> Acquisition** |
| **Consideration transferred:** | |
| Common units issued | 18960034 |
| Closing price of common units on September 15, 2025 | $13.39 |
| Equity consideration | $253875 |
| Cash consideration | 190457 |
| Capitalized transaction costs | 3669 |
| **Total acquisition consideration** | $448001 |
| **Assets acquired:** |  |
| &nbsp;&nbsp;&nbsp;Proved oil and natural gas properties | $494749 |
| &nbsp;&nbsp;&nbsp;Inventories | 4575 |
| &nbsp;&nbsp;&nbsp;Other property, plant and equipment | 353 |
| &nbsp;&nbsp;&nbsp;Other assets | 144 |
| &nbsp;&nbsp;&nbsp;Short-term derivative assets | 5793 |
| &nbsp;&nbsp;&nbsp;Long-term derivative assets | 7246 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total assets acquired | 512860 |
| **Liabilities assumed:** |  |
| &nbsp;&nbsp;&nbsp;Accrued liabilities | 6617 |
| &nbsp;&nbsp;&nbsp;Revenue payable | 1222 |
| &nbsp;&nbsp;&nbsp;Asset retirement obligations | 57020 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total liabilities assumed | 64859 |
| **Net assets acquired** | $448001 |

---

**Note 3 – Pro Forma Adjustments and Assumptions**

The pro forma statement of operations has been prepared to illustrate the effect of the Transactions and has been prepared for informational purposes only.

The preceding pro forma statement of operations has been prepared in accordance with Article 11 of Regulation S-X as amended by the final rule, Release No. 33-10786 "Amendments to Financial Disclosures about Acquired and Disposed Businesses." Release No. 33-10786 replaced the previous pro forma adjustment criteria with simplified requirements to depict the accounting for the Transactions ("Transaction Accounting Adjustments") and allows for supplemental disclosure of the reasonably estimable synergies and other transaction effects that have occurred or are reasonably expected to occur ("Management Adjustments"). Management has elected not to disclose Management Adjustments.

The Company made the following adjustments and assumptions in preparation of the pro forma statement of operations:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a) Adjustment reflects elimination of the amortization as a result
of removing the gas off-take liability as it is now included within the preliminary fair value of oil and gas properties.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b) Adjustments reflect changes to depreciation, depletion and
amortization expense that would have been incurred as a result of the preliminary fair value of acquired oil and natural gas properties
under the full cost method of accounting.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;c) Adjustments reflect changes to depreciation and amortization
of other assets that would have been incurred based on the preliminary fair value of acquired other property and equipment.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;d) Adjustments reflect the elimination of interest expense for
the IKAV Companies and Sabinal and the additional interest expense related to the Company's amended credit facility. The increase
to the Company's credit facility is made up of a $450.0 million term loan bearing interest at 9.8% and a $52.1 million increase
to its revolver bearing interest at 7.9%.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;e) Adjustments reflect the common units issued as consideration
transferred for the Transactions on a pro forma basis assuming the common units issued on September 16, 2025 were outstanding from January
1, 2025.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;f) Adjustments reflect the pro forma impact of the Transactions,
including the issuance of additional common units of the Company, on the calculation of net income per common unit.

**Note 4 – Historical Financial Information of the IKAV Companies**

The following table presents pro forma adjustments to the historical financial information of the IKAV Companies. Certain reclassification adjustments were made to the financial statement presentation of the IKAV Companies in order to conform with the Company's financial statement presentation.

The historical statement of operations for the IKAV Companies for the period from January 1, 2025 through September 16, 2025 and related adjustments are presented below (in thousands):

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
|  | **SIMCOE LLC<br> (Historical)<sup>1</sup>** | **SJ INVESTMENT<br> OPPS LLC <br> (Historical)<sup>1</sup>** | **SIMCOE LLC <br> (Historical)<sup>2</sup>** | **SJ INVESTMENT<br> OPPS LLC <br> (Historical)<sup>2</sup>** | **Reclassification<br> Adjustments** | **IKAV Companies <br> As Adjusted** |
| Revenue |  |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Oil, gas and plant products | $120219 | $— | $54074 | $— | $(174293) | $— |
| &nbsp;&nbsp;&nbsp;Natural gas |  | 16287 |  | 6573 | (22860) |  |
| &nbsp;&nbsp;&nbsp;Oil, natural gas, and NGL sales |  |  |  |  | 197153 | 197153 |
| &nbsp;&nbsp;&nbsp;Gain on oil and natural gas derivatives |  |  |  |  | 676 | 676 |
| &nbsp;&nbsp;&nbsp;Midstream revenue | 6976 |  | 4103 |  | 287 | 11366 |
| &nbsp;&nbsp;&nbsp;Gas off-take agreement amortization | 10466 |  | 4188 |  |  | 14654 |
| &nbsp;&nbsp;&nbsp;Saltwater disposal revenues | 220 |  | 67 |  | (287) |  |
| &nbsp;&nbsp;&nbsp;Rental revenue | 87 |  | 48 |  | (135) |  |
| &nbsp;&nbsp;&nbsp;Other revenues | 202 |  |  |  | 135 | 337 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total revenues | 138170 | 16287 | 62480 | 6573 | 676 | 224186 |
| Operating expenses |  |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Gathering and processing | 21394 | 4489 | 10508 | 1703 |  | 38094 |
| &nbsp;&nbsp;&nbsp;Workover | 6647 | 158 | 4410 | 184 | (11399) |  |
| &nbsp;&nbsp;&nbsp;Lease operating expense | 42482 | 2202 | 21077 | 1201 | 11399 | 78361 |
| &nbsp;&nbsp;&nbsp;Production taxes | 10100 | 1663 | 5355 | 819 |  | 17937 |
| &nbsp;&nbsp;&nbsp;Midstream operating expense |  |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Accretion expense | 2674 | 9 | 900 | 4 | (3587) |  |
| &nbsp;&nbsp;&nbsp;Depreciation, depletion and amortization | 37715 | 7119 | 13709 | 2283 | (60826) |  |
| &nbsp;&nbsp;&nbsp;Depreciation, depletion, amortization and accretion – oil and natural gas |  |  |  |  | 63031 | 63031 |
| &nbsp;&nbsp;&nbsp;Depreciation and amortization – other |  |  |  |  | 1382 | 1382 |
| &nbsp;&nbsp;&nbsp;General and administrative | 2097 | 448 | 10592 | 1548 | 12822 | 27507 |
| &nbsp;&nbsp;&nbsp;General and administrative – related party | 10362 | 2460 |  |  | (12822) |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total operating expenses | 133471 | 18548 | 66551 | 7742 |  | 226312 |
| Income (loss) from operations | 4699 | (2261) | (4071) | (1169) | 676 | (2126) |
| Other (expense) income |  |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Interest expense | (5688) | (2838) | (3794) | (1322) |  | (13642) |
| &nbsp;&nbsp;&nbsp;Foreign currency gain | 27 |  | (2) |  | (25) |  |
| &nbsp;&nbsp;&nbsp;(Loss) gain on derivatives, net | (494) | (6371) | 2992 | 4549 | (676) |  |
| &nbsp;&nbsp;&nbsp;Other income (expense), net |  |  |  |  | 25 | 25 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total other expense | (6155) | (9209) | (804) | 3227 | (676) | (13617) |
| Net loss | $(1456) | $(11470) | $(4875) | $2058 | $— | $(15743) |

---

<sup>1</sup> Reflects the historical operations of the IKAV Companies for the six months ended June 30, 2025.

<sup>2</sup> Reflects the historical operations of the IKAV Companies for the period from July 1, 2025 through September 16, 2025, the date the IKAV Acquisition was closed.

**Note 5 – Historical Financial Information of Sabinal**

The following table presents pro forma adjustments to the historical financial information of Sabinal. In addition to carve-out adjustments for certain oil and natural gas properties and activities that were not acquired from Sabinal as part of the Sabinal Acquisition, certain reclassification adjustments were made to the financial statement presentation of Sabinal in order to conform with the Company's financial statement presentation.

The Company made adjustments to Sabinal's historical statement of operations for the period from January 1, 2025 through September 16, 2025 as shown below in (a) to reflect the carve-out of revenues and operating expenses for certain oil and natural gas properties that were not acquired from Sabinal as part of the Sabinal Acquisition. The historical statement of operations for Sabinal for the period from January 1, 2025 through September 16, 2025 and related adjustments are presented below (in thousands):

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
|  | **Sabinal Energy<br> Operating, LLC<br> (Historical)<sup>1</sup>** | **Sabinal Assets<br> Carve-out<br> Adjustments (a)** | **Sabinal Energy<br> Operating, LLC<br> (Historical)<sup>2</sup>** | **Reclassification<br> Adjustments** | **Sabinal Assets<br> As Adjusted** |
| Revenue |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Oil sales | $132463 | $(11258) | $47992 | $(169197) | $— |
| &nbsp;&nbsp;&nbsp;Natural gas sales | 493 | (218) | 79 | (354) |  |
| &nbsp;&nbsp;&nbsp;Natural gas liquids sales | 2038 | (245) | 521 | (2314) |  |
| &nbsp;&nbsp;&nbsp;Oil, natural gas, and NGL sales |  |  |  | 171865 | 171865 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total revenues | 134994 | (11721) | 48592 |  | 171865 |
| Operating expenses |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Workover expenses | 10761 | (156) | 5745 | (16350) |  |
| &nbsp;&nbsp;&nbsp;Lease operating expense | 33898 | (935) | 17387 | 16350 | 66700 |
| &nbsp;&nbsp;&nbsp;Production taxes | 12050 | (823) | 2274 |  | 13501 |
| &nbsp;&nbsp;&nbsp;Accretion expense | 2706 | (2706) |  |  |  |
| &nbsp;&nbsp;&nbsp;Depreciation, depletion and amortization | 26516 | (26516) |  |  |  |
| &nbsp;&nbsp;&nbsp;Exploration and abandonment expense | 437 | (437) |  |  |  |
| &nbsp;&nbsp;&nbsp;General and administrative | 7461 | (7461) |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total operating expenses | 93829 | (39034) | 25406 |  | 80201 |
| Income from operations | 41165 | 27313 | 23186 |  | 91664 |
| Other (expense) income |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Interest expense | (8374) | 8374 |  |  |  |
| &nbsp;&nbsp;&nbsp;Gain on derivatives, net | 17851 | (17851) |  |  |  |
| &nbsp;&nbsp;&nbsp;Other income (expense), net | 3374 | (3374) |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total other expense | 12851 | (12851) |  |  |  |
| Income before taxes | 54016 | 14462 | 23186 |  | 91664 |
| &nbsp;&nbsp;&nbsp;Tax expense | 400 | (400) |  |  |  |
| Net income | $53616 | $14862 | $23186 | $— | $91664 |

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<sup>1</sup> Reflects the historical operations of Sabinal for the six months ended June 30, 2025.

<sup>2</sup> Reflects the revenues and direct operating expenses of the acquired Sabinal Assets for the period from July 1, 2025 through September 16, 2025, the date the Sabinal Acquisition was closed. Historical information for Sabinal is not available for this stub period.

**Note 6 – Supplementary Disclosure for Oil and Natural Gas Producing Activities**

 

*Oil and natural gas reserves*

The following tables present the estimated pro forma combined net proved developed and undeveloped oil, natural gas and NGLs reserves information as of December 31, 2025 for the Company's proved reserves, along with a summary of changes in quantities for the year ended December 31, 2025. The disclosures below are derived from the *"Proved Reserves Summary"* for the year ended December 31, 2025 included within the Company's Annual Report on Form 10-K. Reserve quantities cannot be measured with precision and their estimation requires many judgmental determinations and frequent revisions. The estimates below are in certain instances presented on a "barrels of oil equivalent" or "Boe" basis. To determine Boe in the following tables, natural gas is converted to a crude oil equivalent at the ratio of six Mcf of natural gas to one barrel of crude oil equivalent.

The pro forma oil and natural gas reserves information is not necessarily indicative of the results that might have occurred had the Transactions been completed on January 1, 2025 and is not intended to be a projection of future results. Future results may vary significantly from the results reflected because of various factors, including those discussed in Part I, Item 1A. "Risk Factors" in the Company's Annual Report on Form 10-K for the year ended December 31, 2025.

The pro forma net proved developed and proved undeveloped oil, natural gas, and NGL reserves as of December 31, 2024 and 2025 and the changes in the pro forma quantities of net remaining proved reserves for the year ended December 31, 2025 are as follows:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Oil and Condensate (MBbls)** | **Oil and Condensate (MBbls)** | **Oil and Condensate (MBbls)** | **Oil and Condensate (MBbls)** |
|  | **Mach Natural<br> Resources LP <br> (Historical)** | **IKAV<br> Acquisition<br> Pro Forma<br> Adjustments** | **Sabinal<br> Acquisition<br> Pro Forma<br> Adjustments** | **Mach Natural<br> Resources LP<br> Combined <br> (Pro Forma)** |
| Proved Developed and Undeveloped Reserves as of: |  |  |  |  |
| December 31, 2024 | 67435 | 618 | 54163 | 122216 |
| Revisions of previous estimates | (8210) | 96 | (2429) | (10543) |
| Purchases in place | 52692 | (667) | (49181) | 2844 |
| Extensions, discoveries and other additions |  |  |  |  |
| Sales in place |  |  |  |  |
| Production | (7719) | (47) | (2553) | (10319) |
| December 31, 2025 | 104198 |  |  | 104198 |
| Proved Developed Reserves as of: |  |  |  |  |
| December 31, 2024 | 46056 | 618 | 47339 | 94013 |
| December 31, 2025 | 90869 |  |  | 90869 |
| Proved Undeveloped Reserves as of: |  |  |  |  |
| December 31, 2024 | 21379 |  | 6824 | 28203 |
| December 31, 2025 | 13329 |  |  | 13329 |

---

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Natural Gas (MMcf)** | **Natural Gas (MMcf)** | **Natural Gas (MMcf)** | **Natural Gas (MMcf)** |
|  | **Mach Natural<br> Resources LP <br> (Historical)** | **IKAV<br> Acquisition<br> Pro Forma<br> Adjustments** | **Sabinal<br> Acquisition<br> Pro Forma<br> Adjustments** | **Mach Natural<br> Resources LP<br> Combined <br> (Pro Forma)** |
| Proved Developed and Undeveloped Reserves as of: |  |  |  |  |
| December 31, 2024 | 1072002 | 809579 | 5697 | 1887278 |
| Revisions of previous estimates | 199215 | 988147 | (464) | 1186898 |
| Purchases in place | 1773560 | (1713090) | (4975) | 55495 |
| Extensions, discoveries and other additions |  |  |  |  |
| Sales in place |  |  |  |  |
| Production | (135026) | (84636) | (258) | (219920) |
| December 31, 2025 | 2909751 |  |  | 2909751 |
| Proved Developed Reserves as of: |  |  |  |  |
| December 31, 2024 | 808820 | 809579 | 5697 | 1624096 |
| December 31, 2025 | 2176382 |  |  | 2176382 |
| Proved Undeveloped Reserves as of: |  |  |  |  |
| December 31, 2024 | 263182 |  |  | 263182 |
| December 31, 2025 | 733369 |  |  | 733369 |

---

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **NGLs (MBbls)** | **NGLs (MBbls)** | **NGLs (MBbls)** | **NGLs (MBbls)** |
|  | **Mach Natural<br> Resources LP <br> (Historical)** | **IKAV<br> Acquisition<br> Pro Forma<br> Adjustments** | **Sabinal<br> Acquisition<br> Pro Forma<br> Adjustments** | **Mach Natural<br> Resources LP<br> Combined <br> (Pro Forma)** |
| Proved Developed and Undeveloped Reserves as of: |  |  |  |  |
| December 31, 2024 | 91150 | 12390 | 1993 | 105533 |
| Revisions of previous estimates | 7241 | 7038 | (33) | 14246 |
| Purchases in place | 24691 | (18415) | (1866) | 4410 |
| Extensions, discoveries and other additions |  |  |  |  |
| Sales in place |  |  |  |  |
| Production | (7507) | (1013) | (94) | (8614) |
| December 31, 2025 | 115575 |  |  | 115575 |
| Proved Developed Reserves as of: |  |  |  |  |
| December 31, 2024 | 66772 | 12390 | 1887 | 81049 |
| December 31, 2025 | 90793 |  |  | 90793 |
| Proved Undeveloped Reserves as of: |  |  |  |  |
| December 31, 2024 | 24378 |  | 106 | 24484 |
| December 31, 2025 | 24782 |  |  | 24782 |

---

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Total (MBoe)** | **Total (MBoe)** | **Total (MBoe)** | **Total (MBoe)** |
|  | **Mach Natural<br> Resources LP <br> (Historical)** | **IKAV <br>Acquisition<br> Pro Forma<br> Adjustments** | **Sabinal<br> Acquisition<br> Pro Forma<br> Adjustments** | **Mach Natural<br> Resources LP<br> Combined <br> (Pro Forma)** |
| Proved Developed and Undeveloped Reserves as of: |  |  |  |  |
| December 31, 2024 | 337250 | 147938 | 57105 | 542293 |
| Revisions of previous estimates | 32234 | 171825 | (2539) | 201519 |
| Purchases in place | 372979 | (304597) | (51876) | 16506 |
| Extensions, discoveries and other additions |  |  |  |  |
| Sales in place |  |  |  |  |
| Production | (37730) | (15166) | (2690) | (55586) |
| December 31, 2025 | 704732 |  |  | 704732 |
| Proved Developed Reserves as of: |  |  |  |  |
| December 31, 2024 | 247630 | 147938 | 50175 | 445743 |
| December 31, 2025 | 544392 |  |  | 544392 |
| Proved Undeveloped Reserves as of: |  |  |  |  |
| December 31, 2024 | 89620 |  | 6930 | 96550 |
| December 31, 2025 | 160340 |  |  | 160340 |

---

*Standardized measure of discounted future net cash flows*

The following tables present the pro forma standardized measure of discounted future net cash flows (the "pro forma standardized measure") applicable to the Company's proved reserves as of December 31, 2025. The future cash flows are discounted at 10% per year and assume continuation of existing economic conditions.

The standardized measure of discounted future net cash flows, in management's opinion, should be examined with caution. The basis for this table is the reserve studies prepared by independent petroleum engineering consultants, which contain imprecise estimates of quantities and rates of production of reserves. Revisions of previous year estimates can have a significant impact on these results. Also, exploration costs in one year may lead to significant discoveries in later years and may significantly change previous estimates of proved reserves and their valuation. Therefore, the standardized measure of discounted future net cash flow is not necessarily indicative of the fair value of the Company's proved oil and natural gas properties.

The data presented should not be viewed as representing the expected cash flow from, or current value of, existing proved reserves since the computations are based on a large number of estimates and assumptions. Reserve quantities cannot be measured with precision and their estimation requires many judgmental determinations and frequent revisions. Actual future prices and costs are likely to be substantially different from the prices and costs utilized in the computation of reported amounts.

The pro forma standardized measure information set forth below gives effect to the Transactions as if they had been completed on January 1, 2025. The pro forma standardized measure is not necessarily indicative of the results that might have occurred had the Transactions been completed on January 1, 2025 and is not intended to be a projection of future results. Future results may vary significantly from the results reflected because of various factors, including those discussed in Part I, Item 1A. "Risk Factors" in the Company's Annual Report on Form 10-K for the year ended December 31, 2025.

The pro forma standardized measure of discounted future net cash flows relating to proved oil and natural gas reserves as of December 31, 2025 is as follows:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **(in thousands)** | **(in thousands)** | **(in thousands)** | **(in thousands)** |
|  | **Mach Natural<br> Resources LP <br> (Historical)** | **IKAV<br> Acquisition<br> Pro Forma<br> Adjustments** | **Sabinal<br> Acquisition<br> Pro Forma<br> Adjustments** | **Mach Natural<br> Resources LP<br> Combined <br> (Pro Forma)** |
| Future cash inflows | $15144885 | $— | $— | $15144885 |
| Future costs: |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Production costs<sup>1</sup> | (7113445) |  |  | (7113445) |
| &nbsp;&nbsp;&nbsp;Development costs<sup>2</sup> | (1897458) |  |  | (1897458) |
| &nbsp;&nbsp;&nbsp;Income taxes<sup>3</sup> | (17761) |  |  | (17761) |
| Future net cash flows | 6116221 |  |  | 6116221 |
| 10% annual discount | (3036223) |  |  | (3036223) |
| Standardized measure | $3079998 | $— | $— | $3079998 |

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<sup>1</sup> Production costs include production severance taxes, ad valorem taxes and operating expenses.

<sup>2</sup> Development costs include plugging expenses, net of salvage and net capital investment.

<sup>3</sup> Represents Texas franchise tax.

 

*Changes in standardized measure*

The changes in the pro forma standardized measure of discounted future net cash flows relating to proved oil and natural gas reserves for the year ended December 31, 2025 are as follows:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **(in thousands)** | **(in thousands)** | **(in thousands)** | **(in thousands)** |
|  | **Mach Natural<br> Resources LP <br> (Historical)** | **IKAV<br> Acquisition<br> Pro Forma<br> Adjustments** | **Sabinal<br> Acquisition<br> Pro Forma<br> Adjustments** | **Mach Natural<br> Resources LP<br> Combined <br> (Pro Forma)** |
| Standardized measure, beginning of period | $1889755 | $187128 | $932770 | $3009653 |
| &nbsp;&nbsp;&nbsp;Revisions of previous quantity estimates | 209397 | 634385 | (50608) | 793174 |
| &nbsp;&nbsp;&nbsp;Changes in estimated future development costs | (34703) | (264027) | 74170 | (224560) |
| &nbsp;&nbsp;&nbsp;Purchases of minerals in place | 1496037 | (774437) | (629634) | 91966 |
| &nbsp;&nbsp;&nbsp;Net changes in prices and production costs | 18371 | 291462 | (333228) | (23395) |
| &nbsp;&nbsp;&nbsp;Divestiture of reserves |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Accretion of discount | 189036 | 13255 | 66071 | 268362 |
| &nbsp;&nbsp;&nbsp;Net change in taxes | (7413) |  |  | (7413) |
| &nbsp;&nbsp;&nbsp;Sales of oil and gas produced, net of production costs | (586260) | (89794) | (91664) | (767718) |
| &nbsp;&nbsp;&nbsp;Development costs incurred during the period | 76192 | 35400 | 21127 | 132719 |
| &nbsp;&nbsp;&nbsp;Change in timing of estimated future production and other | (170414) | (33372) | 10996 | (192790) |
| Standardized measure, end of period | $3079998 | $— | $— | $3079998 |

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