# EDGAR Filing Document

**Accession Number:** 0001980088
**File Stem:** 0001104659-25-092655
**Filing Date:** 2025-9
**Character Count:** 30991
**Document Hash:** de188eb42a75aa83dbb7618ee0327bd5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-092655.hdr.sgml**: 20250923

**ACCESSION NUMBER**: 0001104659-25-092655

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13G

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20250923

**DATE AS OF CHANGE**: 20250923

**SUBJECT COMPANY**: 

**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:** SCHEDULE 13G
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-94205
- **FILM NUMBER:** 251335046

**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
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** IKAV General Partner S.a r.l.
- **CENTRAL INDEX KEY:** 0002028161

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** N4
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G

**BUSINESS ADDRESS:**
- **STREET 1:** 1201 LOUISIANA STREET, SUITE 3400
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77002
- **BUSINESS PHONE:** (833) 706-0273

**MAIL ADDRESS:**
- **STREET 1:** 1201 LOUISIANA STREET, SUITE 3400
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77002

## Exhibit 99.1

**Exhibit 99.1** 

**JOINT FILING AGREEMENT** 

**September 23, 2025**

Pursuant to and in accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended (the "***Exchange Act***"), each party hereto hereby agrees to the joint filing, on behalf of each of them, of any filing required by such party under Section 13 or Section 16 of the Exchange Act or any rule or regulation thereunder (including any amendment, restatement, supplement, and/or exhibit thereto) with the Securities and Exchange Commission (and, if such security is registered on a national securities exchange, also with the applicable exchange), and further agrees to the filing, furnishing, and/or incorporation by reference of this agreement as an exhibit thereto. This agreement shall remain in full force and effect until revoked by any party hereto in a signed writing provided to each other party hereto, and then only with respect to such revoking party.

**IN WITNESS WHEREOF**, each party hereto, being duly authorized, has caused this agreement to be executed and effective as of the date set forth above.

---

| | |
|:---|:---|
| **IKAV General Partner s.a r.l.** | **IKAV General Partner s.a r.l.** |
| By: | /s/ Gregor Gruber |
| Name: | Gregor Gruber |
| Title: | Director |
| By: | /s/ Marco Hoopmann |
| Name: | Marco Hoopmann |
| Title: | Director |
| **VEPU Inc.** | **VEPU Inc.** |
| By: | /s/ Gregor Gruber |
| Name: | Gregor Gruber |
| Title: | Director |
| **IDI Investment s.a r.l.** | **IDI Investment s.a r.l.** |
| By: | /s/ Gregor Gruber |
| Name: | Gregor Gruber |
| Title: | Director |
| By: | /s/ Marco Hoopmann |
| Name: | Marco Hoopmann |
| Title: | Director |
| **IKAV SICAV-FIS SCA** | **IKAV SICAV-FIS SCA** |
| By: | /s/ Gregor Gruber |
| Name: | Gregor Gruber |
| Title: | Director |
| By: | /s/ Marco Hoopmann |
| Name: | Marco Hoopmann |
| Title: | Director |
| **SIMLOG Inc.** | **SIMLOG Inc.** |
| By: | /s/ Bobby Saadati |
| Name: | Bobby Saadati |
| Title: | President |
| By: | /s/ Megan Ebadat |
| Name: | Megan Ebadat |
| Title: | Treasurer |
| **Simlog S.a r.l.** | **Simlog S.a r.l.** |
| By: | /s/ Gregor Gruber |
| Name: | Gregor Gruber |
| Title: | Director |
| By: | /s/ Marco Hoopmann |
| Name: | Marco Hoopmann |
| Title: | Director |
| **Institut fur Kapitalanlagen und Vesicherungslosungen GmbH** | **Institut fur Kapitalanlagen und Vesicherungslosungen GmbH** |
| By: | /s/ Evelin Foelster |
| Name: | Evelin Foelster |
| Title: | Director |
| **Constantin von Wasserschleben** | **Constantin von Wasserschleben** |
| /s/ Constantin von Wasserschleben | /s/ Constantin von Wasserschleben |

---

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

## SCHEDULE 13G

### Under the Securities Exchange Act of 1934

**Issuer:** Mach Natural Resources LP

**Title of Class of Securities:** Common units representing limited partner interests

**CUSIP Number:** 55445L100

**Date of Event Which Requires Filing of this Statement:** 09/16/2025

**Check the appropriate box to designate the rule pursuant to which this Schedule is filed:**

- [ ] Rule 13d-1(b)

- [x] Rule 13d-1(c)

- [ ] Rule 13d-1(d)

---

| 1. | Names of Reporting Persons<br>IKAV General Partner s.a r.l. | Names of Reporting Persons<br>IKAV General Partner s.a r.l. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>N4 | Citizenship or Place of Organization<br>N4 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>30611264.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>30611264.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>30611264.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>30611264.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>18.2% | Percent of Class Represented by Amount in Row (9)<br>18.2% |
| 12. | Type of Reporting Person (See Instructions)<br>FI | Type of Reporting Person (See Instructions)<br>FI |

**Comment for Type of Reporting Person:** In reference to rows 6, 8 and 9, includes (i) common units representing limited partner interests held by VEPU Inc., which is wholly owned by IDI Investment S.a r.l., which is controlled by IKAV SICAV FIS SCA, whose general partner is IKAV General Partner S.a r.l., which is wholly owned by Institut fur Kapitalanlagen und Vesicherungslosungen GmbH, whose majority owner is Mr. von Wasserschleben, and (ii) common units representing limited partner interests held by SIMLOG Inc., which is wholly owned by Simlog S.a r.l., which is controlled by IKAV SICAV FIS SCA, whose general partner is IKAV General Partner S.a r.l., which is wholly owned by Institut fur Kapitalanlagen und Vesicherungslosungen GmbH, whose majority owner is Mr. von Wasserschleben. As such, each of the foregoing entities and Mr. von Wasserschleben may be deemed to share beneficial ownership of the securities held of record by VEPU Inc. and SIMLOG Inc.

---

| 1. | Names of Reporting Persons<br>VEPU Inc. | Names of Reporting Persons<br>VEPU Inc. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>25407349.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>25407349.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>25407349.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>25407349.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>15.1% | Percent of Class Represented by Amount in Row (9)<br>15.1% |
| 12. | Type of Reporting Person (See Instructions)<br>CO, OO | Type of Reporting Person (See Instructions)<br>CO, OO |

**Comment for Type of Reporting Person:** VEPU Inc. is wholly owned by IDI Investment S.a r.l., which is controlled by IKAV SICAV FIS SCA, whose general partner is IKAV General Partner S.a r.l., which is wholly owned by Institut fur Kapitalanlagen und Vesicherungslosungen GmbH, whose majority owner is Mr. von Wasserschleben. As such, each of the foregoing entities and Mr. von Wasserschleben may be deemed to share beneficial ownership of the securities held of record by VEPU Inc.

---

| 1. | Names of Reporting Persons<br>IDI Investment s.a r.l. | Names of Reporting Persons<br>IDI Investment s.a r.l. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>N4 | Citizenship or Place of Organization<br>N4 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>25407349.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>25407349.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>25407349.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>25407349.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>15.1% | Percent of Class Represented by Amount in Row (9)<br>15.1% |
| 12. | Type of Reporting Person (See Instructions)<br>FI, OO | Type of Reporting Person (See Instructions)<br>FI, OO |

**Comment for Type of Reporting Person:** In reference to rows 6, 8 and 9, includes common units representing limited partner interests held by VEPU Inc., which is wholly owned by IDI Investment S.a r.l., which is controlled by IKAV SICAV FIS SCA, whose general partner is IKAV General Partner S.a r.l., which is wholly owned by Institut fur Kapitalanlagen und Vesicherungslosungen GmbH, whose majority owner is Mr. von Wasserschleben. As such, each of the foregoing entities and Mr. von Wasserschleben may be deemed to share beneficial ownership of the securities held of record by VEPU Inc.

---

| 1. | Names of Reporting Persons<br>IKAV SICAV-FIS SCA | Names of Reporting Persons<br>IKAV SICAV-FIS SCA |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>N4 | Citizenship or Place of Organization<br>N4 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>30611264.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>30611264.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>30611264.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>30611264.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>18.2% | Percent of Class Represented by Amount in Row (9)<br>18.2% |
| 12. | Type of Reporting Person (See Instructions)<br>FI, OO | Type of Reporting Person (See Instructions)<br>FI, OO |

**Comment for Type of Reporting Person:** In reference to rows 6, 8 and 9, includes (i) common units representing limited partner interests held by VEPU Inc., which is wholly owned by IDI Investment S.a r.l., which is controlled by IKAV SICAV FIS SCA, whose general partner is IKAV General Partner S.a r.l., which is wholly owned by Institut fur Kapitalanlagen und Vesicherungslosungen GmbH, whose majority owner is Mr. von Wasserschleben, and (ii) common units representing limited partner interests held by SIMLOG Inc., which is wholly owned by Simlog S.a r.l., which is controlled by IKAV SICAV FIS SCA, whose general partner is IKAV General Partner S.a r.l., which is wholly owned by Institut fur Kapitalanlagen und Vesicherungslosungen GmbH, whose majority owner is Mr. von Wasserschleben. As such, each of the foregoing entities and Mr. von Wasserschleben may be deemed to share beneficial ownership of the securities held of record by VEPU Inc. and SIMLOG Inc.

---

| 1. | Names of Reporting Persons<br>SIMLOG Inc. | Names of Reporting Persons<br>SIMLOG Inc. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>5203915.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>5203915.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>5203915.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>5203915.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>3.1% | Percent of Class Represented by Amount in Row (9)<br>3.1% |
| 12. | Type of Reporting Person (See Instructions)<br>CO, OO | Type of Reporting Person (See Instructions)<br>CO, OO |

**Comment for Type of Reporting Person:** SIMLOG Inc. is wholly owned by Simlog S.a r.l., which is controlled by IKAV SICAV FIS SCA, whose general partner is IKAV General Partner S.a r.l., which is wholly owned by Institut fur Kapitalanlagen und Vesicherungslosungen GmbH, whose majority owner is Mr. von Wasserschleben. As such, each of the foregoing entities and Mr. von Wasserschleben may be deemed to share beneficial ownership of the securities held of record by SIMLOG Inc.

---

| 1. | Names of Reporting Persons<br>Simlog S.a r.l. | Names of Reporting Persons<br>Simlog S.a r.l. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>N4 | Citizenship or Place of Organization<br>N4 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>5203915.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>5203915.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>5203915.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>5203915.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>3.1% | Percent of Class Represented by Amount in Row (9)<br>3.1% |
| 12. | Type of Reporting Person (See Instructions)<br>FI, OO | Type of Reporting Person (See Instructions)<br>FI, OO |

**Comment for Type of Reporting Person:** In reference to rows 6, 8 and 9, includes common units representing limited partner interests held by SIMLOG Inc., which is wholly owned by Simlog S.a r.l., which is controlled by IKAV SICAV FIS SCA, whose general partner is IKAV General Partner S.a r.l., which is wholly owned by Institut fur Kapitalanlagen und Vesicherungslosungen GmbH, whose majority owner is Mr. von Wasserschleben. As such, each of the foregoing entities and Mr. von Wasserschleben may be deemed to share beneficial ownership of the securities held of record by SIMLOG Inc.

---

| 1. | Names of Reporting Persons<br>Institut fur Kapitalanlagen und Vesicherungslosungen GmbH | Names of Reporting Persons<br>Institut fur Kapitalanlagen und Vesicherungslosungen GmbH |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>2M | Citizenship or Place of Organization<br>2M |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>30611264.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>30611264.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>30611264.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>30611264.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>18.2% | Percent of Class Represented by Amount in Row (9)<br>18.2% |
| 12. | Type of Reporting Person (See Instructions)<br>FI, OO | Type of Reporting Person (See Instructions)<br>FI, OO |

**Comment for Type of Reporting Person:** In reference to rows 6, 8 and 9, includes (i) common units representing limited partner interests held by VEPU Inc., which is wholly owned by IDI Investment S.a r.l., which is controlled by IKAV SICAV FIS SCA, whose general partner is IKAV General Partner S.a r.l., which is wholly owned by Institut fur Kapitalanlagen und Vesicherungslosungen GmbH, whose majority owner is Mr. von Wasserschleben, and (ii) common units representing limited partner interests held by SIMLOG Inc., which is wholly owned by Simlog S.a r.l., which is controlled by IKAV SICAV FIS SCA, whose general partner is IKAV General Partner S.a r.l., which is wholly owned by Institut fur Kapitalanlagen und Vesicherungslosungen GmbH, whose majority owner is Mr. von Wasserschleben. As such, each of the foregoing entities and Mr. von Wasserschleben may be deemed to share beneficial ownership of the securities held of record by VEPU Inc. and SIMLOG Inc.

---

| 1. | Names of Reporting Persons<br>Constantin von Wasserschleben | Names of Reporting Persons<br>Constantin von Wasserschleben |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>2M | Citizenship or Place of Organization<br>2M |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>30611264.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>30611264.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>30611264.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>30611264.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>18.2% | Percent of Class Represented by Amount in Row (9)<br>18.2% |
| 12. | Type of Reporting Person (See Instructions)<br>IN, OO | Type of Reporting Person (See Instructions)<br>IN, OO |

**Comment for Type of Reporting Person:** In reference to rows 6, 8 and 9, includes (i) common units representing limited partner interests held by VEPU Inc., which is wholly owned by IDI Investment S.a r.l., which is controlled by IKAV SICAV FIS SCA, whose general partner is IKAV General Partner S.a r.l., which is wholly owned by Institut fur Kapitalanlagen und Vesicherungslosungen GmbH, whose majority owner is Mr. von Wasserschleben and (ii) common units representing limited partner interests held by SIMLOG Inc., which is wholly owned by Simlog S.a r.l., which is controlled by IKAV SICAV FIS SCA, whose general partner is IKAV General Partner S.a r.l., which is wholly owned by Institut fur Kapitalanlagen und Vesicherungslosungen GmbH, whose majority owner is Mr. von Wasserschleben. As such, each of the foregoing entities and Mr. von Wasserschleben may be deemed to share beneficial ownership of the securities held of record by VEPU, Inc. and SIMLOG Inc.

---

**Item 1(a). Name of Issuer:**
Mach Natural Resources LP

**Item 1(b). Address of Issuer's Principal Executive Offices:**
14201 Wireless Way, Suite 300 Oklahoma City, OK, 73134

**Item 2(a). Name of Person Filing:**
This statement is filed jointly by and on behalf of each of Constantin von Wasserschleben, Institut fur Kapitalanlagen und Vesicherungslosungen GmbH, IKAV General Partner S.a r.l., IKAV SICAV FIS SCA, Simlog S.a r.l., SIMLOG Inc., IDI Investment S.a r.l. and VEPU Inc. (each a "Reporting Person" and collectively, the "Reporting Persons"). Each Reporting Person disclaims beneficial ownership of the common units representing limited partner interests held directly by the other Reporting Persons.

Each Reporting Person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such Reporting Person is, for the purposes of Section 13(d) or 13(g) of the Securities Exchange Act of 1934, as amended (the "Act"), or any other purpose, the beneficial owner of any securities covered by this statement.

Each Reporting Person may be deemed to be a member of a group with respect to Mach Natural Resources LP (the "Issuer") or securities of the Issuer for the purposes of Section 13(d) or 13(g) of the Act. Each of the Reporting Persons declares that neither the filing of this statement nor anything herein shall be construed as an admission that such Reporting Person is, for the purposes of Section 13(d) or 13(g) of the Act or any other purpose, (i) acting (or has agreed or is agreeing to act together with any other person) as a partnership, limited partnership, syndicate, or other group for the purpose of acquiring, holding, or disposing of securities of the Issuer or otherwise with respect to the Issuer or any securities of the Issuer or (ii) a member of any group with respect to the Issuer or any securities of the Issuer.

**Item 2(b). Address of Principal Business Office:**
The business address for VEPU Inc. is 1301 McKinney Street, Suite 1600, Houston, Texas 77010. The business address for SIMLOG Inc. and Mr. von Wasserschleben is 1201 Louisiana Street, Suite 3400, Houston, Texas 77002. The business address for Simlog S.a r.l., IKAV SICAV FIS SCA, IKAV General Partner S.a r.l. and IDI Investment S.a r.l. is 74a, Route de Luxembourg, Wasserbillig, L-6633 Luxembourg. The business address for the Institut fur Kapitalanlagen und Vesicherungslosungen GmbH is Holzdamm 14, 20099 Hamburg, Germany.

**Item 2(c). Citizenship:**
SIMLOG Inc. and VEPU Inc. are each organized under the laws of the State of Delaware. IDI Investment S.a r.l., Simlog S.a r.l., IKAV SICAV FIS SCA, and IKAV General Partner S.a r.l. are each organized under the laws of Luxembourg. The Institut fur Kapitalanlagen und Vesicherungslosungen GmbH is organized under the laws of Germany. Mr. von Wasserschleben is a citizen of Germany.

**Item 2(d). Title of Class of Securities:**
Common units representing limited partner interests

**Item 2(e). CUSIP Number:**
55445L100

**Item 3. If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:**

(a) [ ] Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b) [ ] Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c) [ ] Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d) [ ] Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e) [ ] An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);

(f) [ ] An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);

(g) [ ] A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h) [ ] A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i) [ ] A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j) [ ] A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), if filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:

(k) [ ] Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).

**Item 4. Ownership:**

**(a) Amount beneficially owned:**

Items 5 through 9 and 11 of each of the cover pages to this Schedule 13G are incorporated herein by reference.

**(b) Percent of class:**

Item 11 of each of the cover pages to this Schedule 13G are incorporated herein by reference.

**(c) Number of shares as to which the person has:**

**(i) Sole power to vote or to direct the vote:**

0

**(ii) Shared power to vote or to direct the vote:**

Item 6 of each of the cover pages to this Schedule 13G are incorporated herein by reference.

**(iii) Sole power to dispose or to direct the disposition of:**

0

**(iv) Shared power to dispose or to direct the disposition of:**

Item 8 of each of the cover pages to this Schedule 13G are incorporated herein by reference.

**Item 5. Ownership of Five Percent or Less of a Class.**

[x] If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following.

**Item 6. Ownership of More than 5 Percent on Behalf of Another Person.**

Not Applicable

**Item 7. Identification and Classification of the Subsidiary**

Not Applicable

**Item 8. Identification and Classification of Members of the Group**

Not Applicable

**Item 9. Notice of Dissolution of Group**

Not Applicable

**Item 10. Certification:**

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

### 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.

**IKAV General Partner s.a r.l.**

**Date:** 09/23/2025

**By:** /s/ Gregor Gruber

**Name & Title:** Gregor Gruber/Director

**VEPU Inc.**

**Date:** 09/23/2025

**By:** /s/ Gregor Gruber

**Name & Title:** Gregor Gruber/Director

**IDI Investment s.a r.l.**

**Date:** 09/23/2025

**By:** /s/ Gregor Gruber

**Name & Title:** Gregor Gruber/Director

**IKAV SICAV-FIS SCA**

**Date:** 09/23/2025

**By:** /s/ Gregor Gruber

**Name & Title:** Gregor Gruber/Director

**SIMLOG Inc.**

**Date:** 09/23/2025

**By:** /s/ Bobby Saadati

**Name & Title:** Bobby Saadati/President

**Simlog S.a r.l.**

**Date:** 09/23/2025

**By:** /s/ Gregor Gruber

**Name & Title:** Gregor Gruber/Director

**Institut fur Kapitalanlagen und Vesicherungslosungen GmbH**

**Date:** 09/23/2025

**By:** /s/ Evelin Foelster

**Name & Title:** Evelin Foelster/Director

**Constantin von Wasserschleben**

**Date:** 09/23/2025

**By:** /s/ Constantin von Wasserschleben

**Name & Title:** Constantin von Wasserschleben