Summit Midstream's three largest insider shareholders as of September 29, 2026 are Midstream, Llc Connect (TenPercentOwner, 1.37Mn shares), J Heath Deneke (Chairman, President And Ceo, 354.35K shares), Midstream, Llc Connect (TenPercentOwner, 146.48K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Midstream, Llc Connect | TenPercentOwner | 1,513,876 | 0 | 1,513,876 | 66.0% | 13 Apr, 2026 |
| 2 | J Heath Deneke | Chairman, President And Ceo | 354,350 | 0 | 354,350 | 15.4% | 17 Mar, 2026 |
| 3 | William J. Mault | Executive Vp And Cfo | 88,694 | 0 | 88,694 | 3.9% | 17 Mar, 2026 |
| 4 | James David Johnston | Executive Vp, Gc, Cco And Secy | 75,357 | 0 | 75,357 | 3.3% | 06 Jul, 2026 |
| 5 | James Lee Jacobe | Director | 45,686 | 0 | 45,686 | 2.0% | 18 Mar, 2026 |
| 6 | Matthew B. Sicinski | Senior Vp And Cao | 39,505 | 0 | 39,505 | 1.7% | 17 Mar, 2026 |
| 7 | James J Cleary | Director | 37,004 | 0 | 37,004 | 1.6% | 18 Mar, 2026 |
| 8 | Robert Joseph Mcnally | Director | 37,004 | 0 | 37,004 | 1.6% | 18 Mar, 2026 |
| 9 | Marguerite Woung-Chapman | Director | 33,271 | 0 | 33,271 | 1.5% | 18 Mar, 2025 |
| 10 | Rommel Oates | Director | 26,170 | 0 | 26,170 | 1.1% | 18 Mar, 2026 |
| 11 | Rommel M. Oates | Director | 22,437 | 0 | 22,437 | 1.0% | 18 Mar, 2025 |
| 12 | Jerry L Peters | Director | 0 | 16,979 | 16,979 | 0.7% | 21 May, 2026 |
| 13 | Carolyn J Stone | Director | 3,733 | 0 | 3,733 | 0.2% | 18 Mar, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 02 Jul, 2026 | James David Johnston | Executive Vp, Gc, Cco And Secy | Disposed S | 2,600 | $29.72 | $77.27K | 75,357 | Direct |
| 19 May, 2026 | Jerry L Peters | Director | Disposed S | 10,000 | $32.00 | $320.00K | 16,979 | Indirect |
| 20 Apr, 2026 | Jerry L Peters | Director | Disposed G | 3,733 | $0.00 | $0 | 0 | Direct |
| 20 Apr, 2026 | Jerry L Peters | Director | Acquired G | 3,733 | $0.00 | $0 | 26,979 | Indirect |
| 31 Mar, 2026 | Midstream, Llc Connect | TenPercentOwner | Acquired P | 1,220,918 | $31.08 | $37.95Mn | 1,367,397 | Direct |
| 16 Mar, 2026 | Jerry L Peters | Director | Acquired A | 3,733 | $0.00 | $0 | 3,733 | Direct |
| 16 Mar, 2026 | James J Cleary | Director | Acquired A | 3,733 | $0.00 | $0 | 37,004 | Direct |
| 16 Mar, 2026 | James Lee Jacobe | Director | Acquired A | 3,733 | $0.00 | $0 | 45,686 | Direct |
| 16 Mar, 2026 | Robert Joseph Mcnally | Director | Acquired A | 3,733 | $0.00 | $0 | 37,004 | Direct |
| 16 Mar, 2026 | Rommel Oates | Director | Acquired A | 3,733 | $0.00 | $0 | 26,170 | Direct |
| 16 Mar, 2026 | Carolyn J Stone | Director | Acquired A | 3,733 | $0.00 | $0 | 3,733 | Direct |
| 13 Mar, 2026 | J Heath Deneke | Chairman, President And Ceo | Acquired M | 58,049 | — | — | 348,757 | Direct |
| 13 Mar, 2026 | Matthew B. Sicinski | Senior Vp And Cao | Acquired M | 6,139 | — | — | 37,486 | Direct |
| 13 Mar, 2026 | James David Johnston | Executive Vp, Gc, Cco And Secy | Acquired M | 18,977 | — | — | 76,664 | Direct |
| 13 Mar, 2026 | William J. Mault | Executive Vp And Cfo | Acquired M | 16,522 | — | — | 87,110 | Direct |
| 13 Mar, 2026 | William J. Mault | Executive Vp And Cfo | Disposed F | 6,502 | $30.29 | $196.95K | 80,608 | Direct |
| 13 Mar, 2026 | J Heath Deneke | Chairman, President And Ceo | Disposed F | 22,239 | $30.29 | $673.62K | 326,518 | Direct |
| 13 Mar, 2026 | James David Johnston | Executive Vp, Gc, Cco And Secy | Disposed F | 7,468 | $30.29 | $226.21K | 69,196 | Direct |
| 13 Mar, 2026 | Matthew B. Sicinski | Senior Vp And Cao | Disposed F | 1,525 | $30.29 | $46.19K | 35,961 | Direct |
| 13 Mar, 2026 | James David Johnston | Executive Vp, Gc, Cco And Secy | Acquired M | 4,653 | — | — | 73,849 | Direct |