Summit Midstream counsel sells 2,600 shares

The transaction was made in compliance with a qualified selling plan adopted pursuant to Rule 10b5-1.

Rhea-AI Filing Summary

Summit Midstream Corp (SMC) Executive Vice President, General Counsel, Chief Compliance Officer and Secretary James David Johnston sold 2,600 shares of Common Stock on October 1, 2026, at a weighted average price of $30.51 per share, rounded to the nearest cent. Prices ranged from $29.85 to $30.75 per share, inclusive. The sale was made in compliance with a qualified selling plan adopted pursuant to Rule 10b5-1. Johnston directly held 72,757 shares after the sale.

Insider Trade Summary 10b5-1

Net Seller: 2,600 shares

Net Sell 1 txn

Insider Johnston James David

Role Executive VP, GC, CCO and Secy

Sold 2,600 shs ($79K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	2,600	$30.51	$79K

Holdings After Transaction: Common Stock — 72,757 shares (Direct)

Footnotes (2)

1. F1. These Common Stocks were sold in compliance with a qualified selling plan adopted by the reporting person pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended.
2. F2. The price reported in Column 4 is a weighted average price and has been rounded to the nearest cent. These Common Stocks were sold in multiple transactions at prices ranging from $29.85 to $30.75, inclusive. The reporting person undertakes to provide to Summit Midstream Corporation, any security holder of Summit Midstream Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Stocks sold at each separate price within the ranges set forth in footnote 2 to this Form 4.

Key Figures

Shares sold: 2,600 shares Weighted average sale price: $30.51 per share Sale price range: $29.85 to $30.75 per share +1 more

4 metrics

Shares sold 2,600 shares October 1, 2026

Weighted average sale price $30.51 per share October 1, 2026; rounded to the nearest cent

Sale price range $29.85 to $30.75 per share October 1, 2026; inclusive

Shares held after sale 72,757 shares Direct holdings following the October 1, 2026 sale

Key Terms

Rule 10b5-1, weighted average price, qualified selling plan

3 terms

Rule 10b5-1 regulatory

"qualified selling plan adopted by the reporting person pursuant to Rule 10b5-1"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

weighted average price financial

"The price reported in Column 4 is a weighted average price"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

qualified selling plan financial

"sold in compliance with a qualified selling plan"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many SMC shares did James David Johnston sell, and at what price?

James David Johnston sold 2,600 shares on October 1, 2026, at a weighted average price of $30.51 per share, rounded to the nearest cent. The sales occurred at prices from $29.85 to $30.75 per share, inclusive.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/02/2026 - 08:59 PM Accepted by SEC EDGAR 10/02/2026 - 08:58 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

X

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^*

Johnston James David

(Last) (First) (Middle)

C/O SUMMIT MIDSTREAM CORPORATION

910 LOUISIANA STREET, SUITE 4200

(Street)

HOUSTON TEXAS 77002

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Summit Midstream Corp [ SMC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Executive VP, GC, CCO and Secy

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/01/2026		S(1)		2,600	D	$30.51(2)	72,757	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. These Common Stocks were sold in compliance with a qualified selling plan adopted by the reporting person pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended.

2. The price reported in Column 4 is a weighted average price and has been rounded to the nearest cent. These Common Stocks were sold in multiple transactions at prices ranging from $29.85 to $30.75, inclusive. The reporting person undertakes to provide to Summit Midstream Corporation, any security holder of Summit Midstream Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Stocks sold at each separate price within the ranges set forth in footnote 2 to this Form 4.

Remarks:

	/s/ James David Johnston	10/02/2026
	** Signature of Reporting Person	Date
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.
* Form 4: SEC 1474 (03-26)