Nov's three largest insider shareholders as of September 29, 2026 are Clay C Williams (Chairman, President And Ceo, 1.61Mn shares), Jose A Bayardo (Chairman, President, And Ceo, 745.68K shares), Joseph W Rovig (President Energy Equipment, 266.83K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Clay C Williams | Chairman, President And Ceo | 1,608,855 | 0 | 1,608,855 | 33.7% | 24 Feb, 2025 |
| 2 | Jose A Bayardo | Chairman, President, And Ceo | 745,678 | 0 | 745,678 | 15.6% | 24 Mar, 2026 |
| 3 | Joseph W Rovig | President Energy Equipment | 266,830 | 0 | 266,830 | 5.6% | 25 Feb, 2026 |
| 4 | Kirk M. Shelton | Officer | 262,683 | 0 | 262,683 | 5.5% | 28 Feb, 2023 |
| 5 | Craig L. Weinstock | Sr. Vp. Gen. Counsel | 253,757 | 0 | 253,757 | 5.3% | 25 Feb, 2026 |
| 6 | Isaac H. Joseph | Officer | 220,829 | 0 | 220,829 | 4.6% | 28 Feb, 2023 |
| 7 | Rodney C. Reed | Senior Vp And Cfo | 165,797 | 0 | 165,797 | 3.5% | 24 Mar, 2026 |
| 8 | Ben A Guill | Director | 163,840 | 0 | 163,840 | 3.4% | 22 May, 2025 |
| 9 | David D Harrison | Director | 126,763 | 0 | 126,763 | 2.7% | 31 Jul, 2026 |
| 10 | Scott B. Livingston | Officer | 118,213 | 0 | 118,213 | 2.5% | 25 Feb, 2026 |
| 11 | Greg L Armstrong | Director | 111,143 | 0 | 111,143 | 2.3% | 22 May, 2025 |
| 12 | Marcela E Donadio | Director | 106,882 | 0 | 106,882 | 2.2% | 22 May, 2026 |
| 13 | Christy Lynn Novak | Vp, Corp. Controller, Cao | 102,561 | 0 | 102,561 | 2.2% | 24 Mar, 2026 |
| 14 | William R. Thomas | Director | 101,166 | 0 | 101,166 | 2.1% | 22 May, 2026 |
| 15 | Christian S Kendall | Director | 95,406 | 0 | 95,406 | 2.0% | 22 May, 2026 |
| 16 | Eric L Mattson | Director | 70,835 | 0 | 70,835 | 1.5% | 22 May, 2025 |
| 17 | James T Hackett | Director | 70,616 | 0 | 70,616 | 1.5% | 03 Jan, 2023 |
| 18 | Robert S. Welborn | Director | 55,429 | 0 | 55,429 | 1.2% | 22 May, 2026 |
| 19 | Melody B Meyer | Director | 43,402 | 0 | 43,402 | 0.9% | 26 May, 2022 |
| 20 | Patricia B Melcher | Director | 34,956 | 0 | 34,956 | 0.7% | 22 May, 2026 |
| 21 | Patricia Martinez | Director | 34,956 | 0 | 34,956 | 0.7% | 22 May, 2026 |
| 22 | Sanjay Chowbey | Director | 9,457 | 0 | 9,457 | 0.2% | 22 May, 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 |
|---|---|---|---|---|---|---|---|---|
| 31 Jul, 2026 | David D Harrison | Director | Disposed S | 9,594 | $19.21 | $184.30K | 126,763 | Direct |
| 20 May, 2026 | Patricia Martinez | Director | Acquired A | 9,457 | $0.00 | $0 | 34,956 | Direct |
| 20 May, 2026 | Robert S. Welborn | Director | Acquired A | 9,457 | $0.00 | $0 | 55,429 | Direct |
| 20 May, 2026 | David D Harrison | Director | Acquired A | 9,457 | $0.00 | $0 | 136,357 | Direct |
| 20 May, 2026 | Marcela E Donadio | Director | Acquired A | 9,457 | $0.00 | $0 | 106,882 | Direct |
| 20 May, 2026 | William R. Thomas | Director | Acquired A | 9,457 | $0.00 | $0 | 101,166 | Direct |
| 20 May, 2026 | Christian S Kendall | Director | Acquired A | 9,457 | $0.00 | $0 | 95,406 | Direct |
| 20 May, 2026 | Sanjay Chowbey | Director | Acquired A | 9,457 | $0.00 | $0 | 9,457 | Direct |
| 20 May, 2026 | Patricia B Melcher | Director | Acquired A | 9,457 | $0.00 | $0 | 34,956 | Direct |
| 20 Mar, 2026 | Rodney C. Reed | Senior Vp And Cfo | Disposed F | 4,995 | $18.68 | $93.31K | 165,797 | Direct |
| 20 Mar, 2026 | Jose A Bayardo | Chairman, President, And Ceo | Disposed F | 4,995 | $18.68 | $93.31K | 745,678 | Direct |
| 20 Mar, 2026 | Christy Lynn Novak | Vp, Corp. Controller, Cao | Disposed F | 869 | $18.68 | $16.23K | 102,561 | Direct |
| 23 Feb, 2026 | Craig L. Weinstock | Sr. Vp. Gen. Counsel | Disposed F | 2,562 | $20.28 | $51.96K | 253,757 | Direct |
| 23 Feb, 2026 | Rodney C. Reed | Senior Vp And Cfo | Disposed F | 2,035 | $20.28 | $41.27K | 170,792 | Direct |
| 23 Feb, 2026 | Christy Lynn Novak | Vp, Corp. Controller, Cao | Disposed F | 3,843 | $20.28 | $77.94K | 103,430 | Direct |
| 23 Feb, 2026 | Scott B. Livingston | Officer | Disposed F | 1,259 | $20.28 | $25.53K | 118,213 | Direct |
| 23 Feb, 2026 | Jose A Bayardo | Chairman, President, And Ceo | Disposed F | 4,220 | $20.28 | $85.58K | 750,673 | Direct |
| 23 Feb, 2026 | Joseph W Rovig | President Energy Equipment | Disposed F | 2,864 | $20.28 | $58.08K | 266,830 | Direct |
| 23 Feb, 2026 | Craig L. Weinstock | Sr. Vp. Gen. Counsel | Acquired M | 20,000 | $15.00 | $300.00K | 296,319 | Direct |
| 23 Feb, 2026 | Joseph W Rovig | President Energy Equipment | Acquired M | 79,086 | $15.00 | $1.19Mn | 348,780 | Direct |