# EDGAR Filing Document

**Accession Number:** 0002024218
**File Stem:** 0001213900-25-083560
**Filing Date:** 2025-9
**Character Count:** 12805
**Document Hash:** 5702bbd140682b5f2d702b6b2f88b17f
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-25-083560.hdr.sgml**: 20250902

**ACCESSION NUMBER**: 0001213900-25-083560

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250828

**FILED AS OF DATE**: 20250902

**DATE AS OF CHANGE**: 20250902

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Downie Jason H
- **CENTRAL INDEX KEY:** 0001351303

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42201
- **FILM NUMBER:** 251286982

**MAIL ADDRESS:**
- **STREET 1:** 6522 WAGGONER DRIVE
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75230
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Herring Edward
- **CENTRAL INDEX KEY:** 0001483120

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42201
- **FILM NUMBER:** 251286981

**MAIL ADDRESS:**
- **STREET 1:** HM CAPITAL PARTNERS
- **STREET 2:** 200 CRESCENT COURT, SUITE 1600
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75201
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Connect Midstream, LLC
- **CENTRAL INDEX KEY:** 0002045908

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42201
- **FILM NUMBER:** 251286985

**BUSINESS ADDRESS:**
- **STREET 1:** 2021 MCKINNEY AVE, SUITE 1250
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75201
- **BUSINESS PHONE:** 214-269-8753

**MAIL ADDRESS:**
- **STREET 1:** 2021 MCKINNEY AVE, SUITE 1250
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75201
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Tailwater Energy Fund III LP
- **CENTRAL INDEX KEY:** 0001710146

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42201
- **FILM NUMBER:** 251286984

**BUSINESS ADDRESS:**
- **STREET 1:** 2021 MCKINNEY AVENUE
- **STREET 2:** SUITE 1250
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75201
- **BUSINESS PHONE:** 214-269-1214

**MAIL ADDRESS:**
- **STREET 1:** 2021 MCKINNEY AVENUE
- **STREET 2:** SUITE 1250
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75201
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Tailwater Capital LLC
- **CENTRAL INDEX KEY:** 0001615830

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42201
- **FILM NUMBER:** 251286983

**BUSINESS ADDRESS:**
- **STREET 1:** 300 CRESCENT COURT
- **STREET 2:** SUITE 200
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75201
- **BUSINESS PHONE:** 214 269-1183

**MAIL ADDRESS:**
- **STREET 1:** 300 CRESCENT COURT
- **STREET 2:** SUITE 200
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75201
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Summit Midstream Corp
- **CENTRAL INDEX KEY:** 0002024218
- **STANDARD INDUSTRIAL CLASSIFICATION:** NATURAL GAS TRANSMISSION [4922]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 910 LOUISIANA STREET, SUITE 4200
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77002
- **BUSINESS PHONE:** 832-413-4770

**MAIL ADDRESS:**
- **STREET 1:** 910 LOUISIANA STREET, SUITE 4200
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77002

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

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Connect Midstream, LLC<br><sub>(Last) (First) (Middle)</sub><br>2021 MCKINNEY AVE,<br>SUITE 1250<br><sub>(Street)</sub><br>DALLAS, TX 75021<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-08-28 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Summit Midstream Corp [ SMC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Tailwater Energy Fund III LP<br><sub>(Last) (First) (Middle)</sub><br>2021 MCKINNEY AVE,<br>SUITE 1250<br><sub>(Street)</sub><br>DALLAS, TX 75201<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-08-28 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Summit Midstream Corp [ SMC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Tailwater Capital LLC<br><sub>(Last) (First) (Middle)</sub><br>2021 MCKINNEY AVE,<br>SUITE 1250<br><sub>(Street)</sub><br>DALLAS, TX 75201<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-08-28 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Summit Midstream Corp [ SMC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Downie Jason H<br><sub>(Last) (First) (Middle)</sub><br>2021 MCKINNEY AVE,<br>SUITE 1250<br><sub>(Street)</sub><br>DALLAS, TX 75201<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-08-28 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Summit Midstream Corp [ SMC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Herring Edward<br><sub>(Last) (First) (Middle)</sub><br>2021 MCKINNEY AVE,<br>SUITE 1250<br><sub>(Street)</sub><br>DALLAS, TX 75201<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-08-28 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Summit Midstream Corp [ SMC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock, par value $0.01 | 2025-08-28 |  | P |  | 26319 | A | 20.89<sup>(1)</sup> | 146479<sup>(1)</sup> | D<sup>(2)</sup> |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $20.43 to $21.01. The Reporting Person undertakes to provide to Summit Midstream Corp (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote.

(2) The reported securities are held directly by Connect Midstream, LLC. Tailwater Energy Fund III LP is the sole member of Connect Midstream, LLC. TW GP EF-III LP is the general partner of Tailwater Energy Fund III LP. TW GP EF-III GP, LLC is the general partner of TW GP EF-III LP. Tailwater Capital LLC is the sole member of TW GP EF-III GP, LLC. Jason Downie and Edward Herring are each a Managing Partner of Tailwater Capital LLC. Each of the foregoing disclaim beneficial ownership of the reported securities directly held by Connect Midstream, LLC except to the extent of their respective pecuniary interest therein.

**Signature:** Connect Midstream, LLC, By: /s/ Jason H. Downie, Director  
**Date:** 2025-09-02

**Signature:** Tailwater Energy Fund III LP, By: TW GP EF-III LP, its general partner, By: TW GP EF-III GP, LLC, its general partner, By: Tailwater Capital LLC, its sole member, By: /s/ Jason H. Downie, Managing Partner  
**Date:** 2025-09-02

**Signature:** Tailwater Capital, LLC, By: /s/ Jason H. Downie, Managing Partner  
**Date:** 2025-09-02

**Signature:** /s/ Jason H. Downie  
**Date:** 2025-09-02

**Signature:** /s/ Edward Herring  
**Date:** 2025-09-02

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**