Summit Midstream (SMC) EVP gains RSUs, withholds shares for taxes

Rhea-AI Filing Summary

Summit Midstream Corp executive James David Johnston reported compensation-related equity activity. On March 16, 2026, he received two grants of 17,544 corporation restricted stock units each, which are economically equivalent to common stock and vest over time or based on performance conditions.

On March 13, 2026, multiple tranches of previously awarded restricted stock units vested and were settled one-for-one into 18,977, 4,653, and 9,793 shares of common stock. To cover tax liabilities, a total of 13,153 common shares were withheld at a price of $30.29 per share, rather than sold in the open market.

After these transactions, Johnston directly holds 77,957 shares of common stock and 90,734 corporation restricted stock units, which include other outstanding tranches with different vesting schedules and associated distribution equivalent rights that pay accrued distributions in cash upon vesting.

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

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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^*

Johnston James David

(Last) (First) (Middle)

C/O SUMMIT MIDSTREAM CORPORATION

910 LOUISIANA STREET, SUITE 4200

(Street)

HOUSTON TX 77002

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
03/13/2026

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

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

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

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	03/13/2026		M		18,977	A	(1)	76,664	D
Common Stock	03/13/2026		F		7,468(2)	D	$30.29	69,196	D
Common Stock	03/13/2026		M		4,653	A	(1)	73,849	D
Common Stock	03/13/2026		F		1,831(2)	D	$30.29	72,018	D
Common Stock	03/13/2026		M		9,793	A	(1)	81,811	D
Common Stock	03/13/2026		F		3,854(2)	D	$30.29	77,957	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
Corporation Restricted Stock Units	(1)	03/13/2026		M			18,977	(3)	(4)	Common Stock	18,977	$0	70,740	D
Corporation Restricted Stock Units	(1)	03/13/2026		M			4,653	(5)	(4)	Common Stock	4,653	$0	66,087	D
Corporation Restricted Stock Units	(1)	03/13/2026		M			9,793	(6)	(4)	Common Stock	9,793	$0	56,294	D
Corporation Restricted Stock Units	(1)	03/16/2026		A		17,544		(7)	(4)	Common Stock	17,544	$0	73,838	D
Corporation Restricted Stock Units	(1)	03/16/2026		A		17,544		(8)	(4)	Common Stock	17,544	$0	90,734(9)	D

Explanation of Responses:

1. Each corporation restricted stock unit is the economic equivalent of one common stock.

2. Common stocks being withheld to pay tax liability.

3. The corporation restricted stock units subject to the original award agreement vested on March 13, 2026. The Reporting Person received distribution equivalent rights ("DERs") for each corporation restricted stock unit, providing for payment on the vesting date of a lump sum of cash equal to the accrued distributions from and after the grant date of the corporation restricted stock units.

4. The corporation restricted stock units and associated DERs do not expire. The corporation restricted stock units are settled upon vesting in common stocks (on a one-for-one basis) or in cash, at the discretion of the Issuer.

5. One-third of the corporation restricted stock units (rounded down to the nearest whole number of units, except in the case of the final vesting date) vested on March 13, 2026, with the remaining corporation restricted stock units vesting on the second and third anniversaries of the March 14, 2025, reference date, subject to continued employment and accelerated vesting as provided in the applicable award agreement. The Reporting Person received DERs for each corporation restricted stock unit, providing for payment on the vesting date of a lump sum of cash equal to the accrued distributions from and after the grant date of the corporation restricted stock units.

6. The final one-third of the corporation restricted stock units subject to the original award agreement vested on March 13, 2026. The Reporting Person received DERs for each corporation restricted stock unit, providing for payment on the vesting date of a lump sum of cash equal to the accrued distributions from and after the grant date of the corporation restricted stock units.

7. One-third of the corporation restricted stock units (rounded down to the nearest whole number of units, except in the case of the final vesting date) shall vest on each of the first, second and third anniversaries of the March 16, 2026, reference date, subject to continued employment and accelerated vesting as provided in the applicable award agreement. The Reporting Person will receive DERs for each corporation restricted stock unit, providing for payment on the vesting date of a lump sum of cash equal to the accrued distributions from and after the grant date of the corporation restricted stock units.

8. The corporation restricted stock units shall vest if and to the extent that the corporation restricted stock units are earned during the performance period from January 1, 2026 through December 31, 2028, which will depend on whether the performance criteria are achieved as determined by the committee as soon as reasonably practicable, but no later than sixty (60) days following December 31, 2028, the last day of the Performance Period. The vesting of the corporation restricted stock units is subject to continued employment and accelerated vesting as provided in the applicable award agreement. The Reporting Person will receive DERs for each corporation restricted stock unit, providing for payment on the vesting date of a lump sum of cash equal to the accrued distributions from and after the grant date of the corporation restricted stock units.

9. This total includes corporation restricted stock units from other tranches with different vesting dates. On March 16, 2026, when the original award agreement vested, it was certified at an achievement level of 96.7% of the target number of corporation restricted stock units. The remaining 3.3% of the target corporation restricted stock units that were not earned based on the certified performance level were forfeited. The difference between the number of outstanding awards reflected in the Reporting Person's brokerage account and the number previously reported is attributable to this certification and the corresponding forfeiture of the unearned portion of the original award.

Remarks:

	/s/ James David Johnston	03/17/2026
	** Signature of Reporting Person	Date
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