James David Johnston - 13 Mar 2026 Form 4 Insider Report for Summit Midstream Corp (SMC)

Reporting relationship: Executive VP, GC, CCO and Secy
Issuer ticker: SMC
Reported as of: 13 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 17 Mar 2026, 19:46:12 UTC
Prior SEC filing: 21 Jan 2026
Next SEC filing: 06 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ James David Johnston

Key filing fact

James David Johnston filed Form 4 for Summit Midstream Corp (SMC) on 17 Mar 2026.

Key facts

This page summarizes James David Johnston's Form 4 filing for Summit Midstream Corp (SMC).
11 reported transactions and 5 derivative rows are listed below.
Accepted by SEC: 17 Mar 2026, 19:46.

Change

Previous filing in this sequence was filed on 21 Jan 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001823482 Primary reporting owner

Johnston James David

Relationship: Executive VP, GC, CCO and Secy
Address: C/O SUMMIT MIDSTREAM CORPORATION, 910 LOUISIANA STREET, SUITE 4200, HOUSTON
Signature: /s/ James David Johnston
Signature date: 17 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

SMC transaction

Common Stock

Options Exercise

Transaction value
Shares: +18,977
Change %: +33%
Price
Shares after: 76,664
Date: 13 Mar 2026
Ownership: Direct
Footnotes: F1

SMC transaction

Common Stock

Tax liability

Transaction value
Shares: -7,468
Change %: -9.7%
Price: $30.29^*
Shares after: 69,196
Date: 13 Mar 2026
Ownership: Direct
Footnotes: F2

SMC transaction

Common Stock

Options Exercise

Transaction value
Shares: +4,653
Change %: +6.7%
Price
Shares after: 73,849
Date: 13 Mar 2026
Ownership: Direct
Footnotes: F1

SMC transaction

Common Stock

Tax liability

Transaction value
Shares: -1,831
Change %: -2.5%
Price: $30.29^*
Shares after: 72,018
Date: 13 Mar 2026
Ownership: Direct
Footnotes: F2

SMC transaction

Common Stock

Options Exercise

Transaction value
Shares: +9,793
Change %: +14%
Price
Shares after: 81,811
Date: 13 Mar 2026
Ownership: Direct
Footnotes: F1

SMC transaction

Common Stock

Tax liability

Transaction value
Shares: -3,854
Change %: -4.7%
Price: $30.29^*
Shares after: 77,957
Date: 13 Mar 2026
Ownership: Direct
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

SMC transaction Derivative

Corporation Restricted Stock Units

Options Exercise

Transaction value
Shares: -18,977
Change %: -21%
Price: $0.000000^*
Shares after: 70,740
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 18,977
Exercise price
Footnotes: F1, F3, F4

SMC transaction Derivative

Corporation Restricted Stock Units

Options Exercise

Transaction value
Shares: -4,653
Change %: -6.6%
Price: $0.000000^*
Shares after: 66,087
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 4,653
Exercise price
Footnotes: F1, F4, F5

SMC transaction Derivative

Corporation Restricted Stock Units

Options Exercise

Transaction value
Shares: -9,793
Change %: -15%
Price: $0.000000^*
Shares after: 56,294
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 9,793
Exercise price
Footnotes: F1, F4, F6

SMC transaction Derivative

Corporation Restricted Stock Units

Award

Transaction value
Shares: +17,544
Change %: +31%
Price: $0.000000^*
Shares after: 73,838
Date: 16 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 17,544
Exercise price
Footnotes: F1, F4, F7

SMC transaction Derivative

Corporation Restricted Stock Units

Award

Transaction value
Shares: +17,544
Change %: +24%
Price: $0.000000^*
Shares after: 90,734
Date: 16 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 17,544
Exercise price
Footnotes: F1, F4, F8, F9

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 9 footnotes

Footnote F1

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

Footnote F2

Common stocks being withheld to pay tax liability.

Footnote F3

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.

Footnote F4

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.

Footnote F5

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.

Footnote F6

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.

Footnote F7

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.

Footnote F8

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.

Footnote F9

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.