DTM's three largest insider shareholders as of September 29, 2026 are David Slater (Exec. Chair And Ceo, 262.97K shares), Christopher Zona (President And Chief Oper. Off., 96.13K shares), Jeffrey A Jewell (Executive V.P., Cfo, 89.88K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | David Slater | Exec. Chair And Ceo | 262,972 | 0 | 262,972 | 46.9% | 19 Feb, 2026 |
| 2 | Christopher Zona | President And Chief Oper. Off. | 96,130 | 0 | 96,130 | 17.1% | 19 Feb, 2026 |
| 3 | Jeffrey A Jewell | Executive V.P., Cfo | 89,877 | 0 | 89,877 | 16.0% | 05 Aug, 2026 |
| 4 | Robert C Jr Skaggs | Executive Chairman | 37,289 | 0 | 37,289 | 6.6% | 27 Feb, 2024 |
| 5 | Wendy Ellis | E.V.P., Gen Counsel Corp Sec | 26,773 | 0 | 26,773 | 4.8% | 19 Feb, 2026 |
| 6 | Melissa Cox | E.V.P., Chief Admin. Off. | 12,133 | 0 | 12,133 | 2.2% | 19 Feb, 2026 |
| 7 | Peter I Tumminello | Director | 11,386 | 0 | 11,386 | 2.0% | 27 Feb, 2026 |
| 8 | Angela N Archon | Director | 6,073 | 0 | 6,073 | 1.1% | 07 May, 2026 |
| 9 | Elaine M Pickle | Director | 5,808 | 0 | 5,808 | 1.0% | 10 Aug, 2026 |
| 10 | Richard L Jr Redmond | E.V.P., Chief Admin. Off. | 5,480 | 0 | 5,480 | 1.0% | 24 Feb, 2022 |
| 11 | Dwayne Andree Wilson | Director | 2,808 | 0 | 2,808 | 0.5% | 04 Aug, 2025 |
| 12 | Stephen W Baker | Director | 2,808 | 0 | 2,808 | 0.5% | 04 Aug, 2025 |
| 13 | Joseph Peter Finland | Chief Accounting Officer | 1,657 | 0 | 1,657 | 0.3% | 09 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 |
|---|---|---|---|---|---|---|---|---|
| 07 Aug, 2026 | Elaine M Pickle | Director | Acquired P | 1,500 | $132.61 | $198.92K | 5,808 | Direct |
| 05 Aug, 2026 | Jeffrey A Jewell | Executive V.P., Cfo | Acquired P | 145 | $133.78 | $19.40K | 89,877 | Direct |
| 15 May, 2026 | Jeffrey A Jewell | Executive V.P., Cfo | Acquired P | 150 | $147.73 | $22.16K | 89,732 | Direct |
| 05 May, 2026 | Robert C Jr Skaggs | Director | Acquired A | 1,093 | $0.00 | $0 | 1,093 | Direct |
| 05 May, 2026 | Dwayne Andree Wilson | Director | Acquired A | 1,093 | $0.00 | $0 | 1,093 | Direct |
| 05 May, 2026 | Peter I Tumminello | Director | Acquired A | 1,093 | $0.00 | $0 | 1,093 | Direct |
| 05 May, 2026 | Elaine M Pickle | Director | Acquired A | 1,093 | $0.00 | $0 | 1,093 | Direct |
| 05 May, 2026 | Stephen W Baker | Director | Acquired A | 1,093 | $0.00 | $0 | 1,093 | Direct |
| 06 May, 2026 | Angela N Archon | Director | Acquired M | 1,178 | — | — | 6,073 | Direct |
| 05 May, 2026 | Angela N Archon | Director | Acquired A | 1,093 | $0.00 | $0 | 1,093 | Direct |
| 06 May, 2026 | Angela N Archon | Director | Disposed M | 1,145 | $0.00 | $0 | 0 | Direct |
| 04 May, 2026 | Jeffrey A Jewell | Executive V.P., Cfo | Acquired M | 16,109 | — | — | 105,691 | Direct |
| 04 May, 2026 | Jeffrey A Jewell | Executive V.P., Cfo | Disposed F | 16,109 | $138.70 | $2.23Mn | 89,582 | Direct |
| 04 May, 2026 | Jeffrey A Jewell | Executive V.P., Cfo | Disposed M | 13,209 | $0.00 | $0 | 0 | Direct |
| 05 Mar, 2026 | Joseph Peter Finland | Chief Accounting Officer | Acquired M | 1,033 | — | — | 2,069 | Direct |
| 05 Mar, 2026 | Joseph Peter Finland | Chief Accounting Officer | Disposed F | 412 | $141.77 | $58.41K | 1,657 | Direct |
| 05 Mar, 2026 | Joseph Peter Finland | Chief Accounting Officer | Disposed M | 965 | $0.00 | $0 | 965 | Direct |
| 26 Feb, 2026 | Peter I Tumminello | Director | Disposed S | 2,002 | $135.79 | $271.85K | 11,386 | Direct |
| 25 Feb, 2026 | Jeffrey A Jewell | Executive V.P., Cfo | Acquired P | 185 | $136.33 | $25.22K | 89,583 | Direct |
| 20 Feb, 2026 | David Slater | Exec. Chair And Ceo | Acquired A | 16,285 | $0.00 | $0 | 16,285 | Direct |