Insider Transactions Reported by 19 Insiders of Summit Midstream Corp

Symbol: SMC on NYSE
Location: Houston, TX

Quick Takeaways

SMC - Summit Midstream Corp has 19 insiders with reported activity on this page.
Net insider value flow over the last year: +$192,740,831.
Recent transaction rows are available for direct filing-level review.

What Changed

Buy value: $192,740,831; sell value: $0.
Net share flow: +6,251,069.

Why This Matters

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Source Evidence

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Net insider flow leans to buying over the last 12 months. Net value: +$192,740,831.

Buys

$192,740,831

Shares: 6,251,069

Insiders: 5

Sells

Shares: 0

Insiders: 0

Net

+$192,740,831

Shares: +6,251,069

Insiders: 5

Window (months)	Buy shares	Buy $	Sell $	Net $
0-3	6,104,590	$189,730,657	$0	+$189,730,657
3-6	0	$0	$0	$0
6-9	146,479	$3,010,174	$0	+$3,010,174
9-12	0	$0	$0	$0

Summit Midstream Corp executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
Tailwater Capital LLC	10%+ Owner	$42,498,698	+$37,946,131	+834%	Filing P/S	31 Mar 2026
Connect Midstream, LLC	10%+ Owner	$42,498,698	+$40,956,305	+2655%	Filing P/S	31 Mar 2026
Edward Herring	Director, 10%+ Owner	$42,498,698	+$37,946,131	+834%	Filing P/S	31 Mar 2026
Jason H. Downie	Director, 10%+ Owner	$42,498,698	+$37,946,131	+834%	Filing P/S	31 Mar 2026
Tailwater Energy Fund III LP	10%+ Owner	$42,498,698	+$37,946,131	+834%	Filing P/S	31 Mar 2026
J. Heath Deneke	Chairman, President and CEO	$21,962,758			Mixed	13 Mar 2026
William J. Mault	Executive VP and CFO	$6,050,541			Mixed	13 Mar 2026
James David Johnston	Executive VP, GC, CCO and Secy	$5,977,179			Mixed	13 Mar 2026
Matthew B. Sicinski	Senior VP and CAO	$2,337,113			Mixed	13 Mar 2026
Marguerite Woung-Chapman	Director	$1,246,664			Mixed	14 Mar 2025
James Lee Jacobe	Director	$1,236,263			Mixed	16 Mar 2026
James J. Cleary	Director	$1,001,328			Mixed	16 Mar 2026
Robert J. McNally	Director	$1,001,328			Mixed	16 Mar 2026
Rommel M. Oates	Director	$840,714			Mixed	14 Mar 2025
Jerry L. Peters	Director	$815,882			Median	20 Apr 2026
Rommel M. Oates	Director	$708,160			Mixed	16 Mar 2026
Carolyn J. Stone	Director	$101,014			Mixed	16 Mar 2026
Stephen M. Lipscomb	Director				Mixed	02 Dec 2024
Andrew A. Winston	Director				Mixed	02 Dec 2024

Top shareholders of Summit Midstream Corp (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
Connect Midstream, LLC	13D/G 3/4/5	10%+ Owner	39%	7,891,864	$238,672,854	+$36,924,101	31 Mar 2026	13D/G 3/4/5
Edward Herring	3/4/5	Director, 10%+ Owner	11%	1,367,397	$42,498,698	+$37,946,131	31 Mar 2026	3/4/5
Jason H. Downie	3/4/5	Director, 10%+ Owner	11%	1,367,397	$42,498,698	+$37,946,131	31 Mar 2026	3/4/5
Tailwater Capital LLC	3/4/5	10%+ Owner	11%	1,367,397	$42,498,698	+$37,946,131	31 Mar 2026	3/4/5
Tailwater Energy Fund III LP	3/4/5	10%+ Owner	11%	1,367,397	$42,498,698	+$37,946,131	31 Mar 2026	3/4/5
He Zhengxu	13D/G	—	8.1%	1,511,500	$40,320,925	+$15,352,096	31 Dec 2025	13D/G
Invesco Ltd.	13F 13D/G	Company	7.8% from 13D/G	969,399	$29,314,624	—	31 Mar 2026	13F 13D/G
J. Heath Deneke	3/4/5	Chairman, President and CEO	— mixed-class rows	651,601 mixed-class rows	$21,962,758	—	13 Mar 2026	3/4/5
Deltroit Asset Management (UK) LLP	13F	Company	5.7%	707,056	$21,381,373	—	31 Mar 2026	13F
BlackRock, Inc.	13F 13D/G	Company	4.9% from 13D/G	649,391	$19,637,585	—	31 Mar 2026	13F 13D/G
VANGUARD CAPITAL MANAGEMENT LLC	13F	Company	4%	506,171	$15,306,611	—	31 Mar 2026	13F
Tall Oak Midstream Investments, LLC	13D/G	—	3.9%	473,273	$14,046,743	$0	02 Jun 2025	13D/G
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1.9%	233,022	$7,048,832	—	31 Mar 2026	13F
EAGLE GLOBAL ADVISORS LLC	13F	Company	1.8%	226,798	$6,858,372	—	31 Mar 2026	13F
William J. Mault	3/4/5	Executive VP and CFO	— mixed-class rows	179,161 mixed-class rows	$6,050,541	—	13 Mar 2026	3/4/5
James David Johnston	3/4/5	Executive VP, GC, CCO and Secy	— mixed-class rows	168,691 mixed-class rows	$5,977,179	—	13 Mar 2026	3/4/5
STATE STREET CORP	13F	Company	1.4%	178,607	$5,401,076	—	31 Mar 2026	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	1.4%	174,325	$5,271,588	—	31 Mar 2026	13F
BANK OF AMERICA CORP /DE/	13F	Company	1.2%	154,540	$4,673,289	—	31 Mar 2026	13F
Flat Footed LLC	13F	Company	0.99%	124,278	$3,758,167	—	31 Mar 2026	13F
AMERICAN CENTURY COMPANIES INC	13F	Company	0.98%	122,421	$3,702,011	—	31 Mar 2026	13F
BRIDGEWAY CAPITAL MANAGEMENT, LLC	13F	Company	0.94%	117,796	$3,562,151	—	31 Mar 2026	13F
ARK & TLK INVESTMENTS, LLC	13F	Company	0.87%	109,234	$3,303,237	—	31 Mar 2026	13F
MORGAN STANLEY	13F	Company	0.77%	96,244	$2,910,419	—	31 Mar 2026	13F
Empowered Funds, LLC	13F	Company	0.72%	89,796	$2,715,431	—	31 Mar 2026	13F
Liberty Mutual Group Asset Management Inc.	13F	Company	0.68%	84,840	$2,565,562	—	31 Mar 2026	13F
Matthew B. Sicinski	3/4/5	Senior VP and CAO	— mixed-class rows	69,217 mixed-class rows	$2,337,113	—	13 Mar 2026	3/4/5
VANGUARD FIDUCIARY TRUST CO	13F	Company	0.57%	71,407	$2,159,348	—	31 Mar 2026	13F
NORTHERN TRUST CORP	13F	Company	0.56%	70,291	$2,125,599	—	31 Mar 2026	13F
FARALLON CAPITAL MANAGEMENT LLC	13F	Company	0.47%	58,214	$1,760,391	—	31 Mar 2026	13F
Cetera Investment Advisers	13F	Company	0.45%	56,533	$1,709,558	—	31 Mar 2026	13F
Summit Financial, LLC	13F	Company	0.42%	52,985	$1,602,266	—	31 Mar 2026	13F
VANGUARD PORTFOLIO MANAGEMENT LLC	13F	Company	0.4%	49,660	$1,501,718	—	31 Mar 2026	13F
ALGERT GLOBAL LLC	13F	Company	0.37%	46,711	$1,413,000	—	31 Mar 2026	13F
Fractal Investments LLC	13F	Company	0.36%	45,000	$1,360,800	—	31 Mar 2026	13F
JANE STREET GROUP, LLC	13F	Company	0.34%	42,730	$1,292,155	—	31 Mar 2026	13F
Marguerite Woung-Chapman	3/4/5	Director	— class O/S missing	33,271	$1,246,664	—	14 Mar 2025	3/4/5
James Lee Jacobe	3/4/5	Director	0.37%	45,686	$1,236,263	—	16 Mar 2026	3/4/5
James J. Cleary	3/4/5	Director	0.3%	37,004	$1,001,328	—	16 Mar 2026	3/4/5
Robert J. McNally	3/4/5	Director	0.3%	37,004	$1,001,328	—	16 Mar 2026	3/4/5
Rommel M. Oates	3/4/5	Director	— class O/S missing	22,437	$840,714	—	14 Mar 2025	3/4/5
Jerry L. Peters	3/4/5	Director	0.22%	26,979	$815,882	—	20 Apr 2026	3/4/5
JB CAPITAL PARTNERS LP	13F	Company	0.21%	26,165	$791,230	—	31 Mar 2026	13F
JPMORGAN CHASE & CO	13F	Company	0.19%	23,149	$719,471	—	31 Mar 2026	13F
JACOBS LEVY EQUITY MANAGEMENT, INC	13F	Company	0.19%	23,443	$708,916	—	31 Mar 2026	13F
Rommel M. Oates	3/4/5	Director	0.21%	26,170	$708,160	—	16 Mar 2026	3/4/5
SUSQUEHANNA INTERNATIONAL GROUP, LLP	13F	Company	0.18%	23,117	$699,058	—	31 Mar 2026	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.18%	22,476	$679,674	—	31 Mar 2026	13F
RAYMOND JAMES FINANCIAL INC	13F	Company	0.18%	22,112	$668,667	—	31 Mar 2026	13F
CITIGROUP INC	13F	Company	0.17%	21,777	$658,536	—	31 Mar 2026	13F

Recent Insider Transactions by Companies or Individuals for Summit Midstream Corp

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Value $	* Price $	Shares	Shares Owned	Date	Ownership
Jerry L. Peters	SMC	Common Stock	Gift	16.1%			3,733	26,979	20 Apr 2026	By Joint Spousal Trust
Jerry L. Peters	SMC	Common Stock	Gift	-100%			-3,733	0	20 Apr 2026	Direct
Connect Midstream, LLC	SMC	Common Stock, par value $0.01 per share	Purchase	833.5%	$37,946,131	$31.08	1,220,918	1,367,397	31 Mar 2026	Direct
Connect Midstream, LLC	SMC	Common Stock, par value $0.01 per share	Purchase	833.5%	$37,946,131	$31.08	1,220,918	1,367,397	31 Mar 2026	Direct
Connect Midstream, LLC	SMC	Common Stock, par value $0.01 per share	Purchase	833.5%	$37,946,131	$31.08	1,220,918	1,367,397	31 Mar 2026	Direct
Connect Midstream, LLC	SMC	Common Stock, par value $0.01 per share	Purchase	833.5%	$37,946,131	$31.08	1,220,918	1,367,397	31 Mar 2026	Direct
Connect Midstream, LLC	SMC	Common Stock, par value $0.01 per share	Purchase	833.5%	$37,946,131	$31.08	1,220,918	1,367,397	31 Mar 2026	Direct
Jerry L. Peters	SMC	Common Stock	Award				3,733	3,733	16 Mar 2026	Direct
Rommel M. Oates	SMC	Common Stock	Award	16.6%			3,733	26,170	16 Mar 2026	Direct
Carolyn J. Stone	SMC	Common Stock	Award				3,733	3,733	16 Mar 2026	Direct
James Lee Jacobe	SMC	Common Stock	Award	8.9%			3,733	45,686	16 Mar 2026	Direct
Robert J. McNally	SMC	Common Stock	Award	11.2%			3,733	37,004	16 Mar 2026	Direct
James J. Cleary	SMC	Common Stock	Award	11.2%			3,733	37,004	16 Mar 2026	Direct
Matthew B. Sicinski	SMC	Corporation Restricted Stock Units	Award	62.1%			11,384	29,712	16 Mar 2026	Direct
William J. Mault	SMC	Corporation Restricted Stock Units	Award	66.5%			36,142	90,467	16 Mar 2026	Direct
James David Johnston	SMC	Corporation Restricted Stock Units	Award	63.1%			35,088	90,734	16 Mar 2026	Direct
J. Heath Deneke	SMC	Corporation Restricted Stock Units	Award	67.3%			119,614	297,251	16 Mar 2026	Direct
Matthew B. Sicinski	SMC	Common Stock	Tax liability	-6.9%			-2,666	35,961	13 Mar 2026	Direct
Matthew B. Sicinski	SMC	Common Stock	Options Exercise	36.8%			10,824	40,278	13 Mar 2026	Direct
Matthew B. Sicinski	SMC	Corporation Restricted Stock Units	Options Exercise	-36.9%			-10,824	18,538	13 Mar 2026	Direct
William J. Mault	SMC	Common Stock	Tax liability	-12.7%			-11,751	80,608	13 Mar 2026	Direct
William J. Mault	SMC	Common Stock	Options Exercise	48%			29,857	92,056	13 Mar 2026	Direct
William J. Mault	SMC	Corporation Restricted Stock Units	Options Exercise	-35.2%			-29,857	54,889	13 Mar 2026	Direct
James David Johnston	SMC	Common Stock	Tax liability	-16%			-13,153	69,196	13 Mar 2026	Direct
James David Johnston	SMC	Common Stock	Options Exercise	69.1%			33,423	81,811	13 Mar 2026	Direct
James David Johnston	SMC	Corporation Restricted Stock Units	Options Exercise	-37.2%			-33,423	56,294	13 Mar 2026	Direct
J. Heath Deneke	SMC	Common Stock	Tax liability	-11%			-40,297	326,518	13 Mar 2026	Direct
J. Heath Deneke	SMC	Common Stock	Options Exercise	39.6%			103,939	366,161	13 Mar 2026	Direct
J. Heath Deneke	SMC	Corporation Restricted Stock Units	Options Exercise	-36.7%			-103,939	179,617	13 Mar 2026	Direct
William J. Mault	SMC	Common Stock	Tax liability	-3.76%			-2,757	70,588	16 Jan 2026	Direct
William J. Mault	SMC	Common Stock	Options Exercise	16%			10,121	73,345	16 Jan 2026	Direct
William J. Mault	SMC	Corporation Restricted Stock Units	Options Exercise	-10.7%			-10,121	84,746	16 Jan 2026	Direct
Matthew B. Sicinski	SMC	Common Stock	Tax liability	-3.29%			-1,066	31,347	16 Jan 2026	Direct
Matthew B. Sicinski	SMC	Common Stock	Options Exercise	12.5%			3,593	32,413	16 Jan 2026	Direct
Matthew B. Sicinski	SMC	Corporation Restricted Stock Units	Options Exercise	-10.9%			-3,593	29,362	16 Jan 2026	Direct
James David Johnston	SMC	Common Stock	Tax liability	-4.82%			-2,923	57,687	16 Jan 2026	Direct
James David Johnston	SMC	Common Stock	Options Exercise	21.7%			10,794	60,610	16 Jan 2026	Direct
James David Johnston	SMC	Corporation Restricted Stock Units	Options Exercise	-10.7%			-10,794	89,717	16 Jan 2026	Direct
J. Heath Deneke	SMC	Common Stock	Tax liability	-2.75%			-8,216	290,708	16 Jan 2026	Direct
J. Heath Deneke	SMC	Common Stock	Options Exercise	12.3%			32,754	298,924	16 Jan 2026	Direct
J. Heath Deneke	SMC	Corporation Restricted Stock Units	Options Exercise	-10.4%			-32,754	283,556	16 Jan 2026	Direct
Connect Midstream, LLC	SMC	Common Stock, par value $0.01	Purchase	21.9%	$549,804	$20.89	26,319	146,479	28 Aug 2025	Direct
Connect Midstream, LLC	SMC	Common Stock, par value $0.01	Purchase	65.2%	$971,720	$20.50	47,401	120,160	27 Aug 2025	Direct
Connect Midstream, LLC	SMC	Common Stock, par value $0.01	Purchase		$1,488,649	$20.46	72,759	72,759	26 Aug 2025	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.