NG's three largest insider shareholders as of September 29, 2026 are Strategic Resources L.P. Electrum (TenPercentOwner, 92.90Mn shares), Holdings Llc Grat (Other, 5.29Mn shares), Gregory A. Lang (President And Ceo, 1.56Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Strategic Resources L.P. Electrum | TenPercentOwner | 92,902,813 | 0 | 92,902,813 | 92.6% | 09 May, 2025 |
| 2 | Holdings Llc Grat | Other | 5,286,977 | 0 | 5,286,977 | 5.3% | 03 Jul, 2023 |
| 3 | David A. Ottewell | Vice President Cfo | 824,117 | 0 | 824,117 | 0.8% | 02 Jul, 2024 |
| 4 | Richard Alan Williams | Vice President Coo | 452,530 | 0 | 452,530 | 0.5% | 02 Jul, 2026 |
| 5 | Clynton R. Nauman | Director | 187,589 | 0 | 187,589 | 0.2% | 01 Mar, 2023 |
| 6 | Igor Levental | Director | 152,808 | 0 | 152,808 | 0.2% | 02 Jun, 2022 |
| 7 | Gregory A. Lang | President And Ceo | 113,245 | 0 | 113,245 | 0.1% | 01 Jul, 2026 |
| 8 | Kalidas V Madhavpeddi | Director | 63,858 | 0 | 63,858 | 0.1% | 02 Sep, 2026 |
| 9 | Ethan Schutt | Director | 54,798 | 0 | 54,798 | 0.1% | 02 Sep, 2026 |
| 10 | Anthony P. Walsh | Director | 48,549 | 0 | 48,549 | 0.0% | 01 Mar, 2024 |
| 11 | Quintanilla Daniel Muniz | Director | 48,339 | 0 | 48,339 | 0.0% | 02 Sep, 2026 |
| 12 | Sharon Dowdall | Director | 45,519 | 0 | 45,519 | 0.0% | 14 Apr, 2023 |
| 13 | Elaine J Dorward-King | Director | 38,583 | 0 | 38,583 | 0.0% | 02 Sep, 2026 |
| 14 | Diane R Garrett | Director | 35,990 | 0 | 35,990 | 0.0% | 02 Jun, 2025 |
| 15 | Hume D. Kyle | Director | 26,637 | 0 | 26,637 | 0.0% | 02 Sep, 2026 |
| 16 | Dawn Patricia Whittaker | Director | 25,869 | 0 | 25,869 | 0.0% | 02 Sep, 2026 |
| 17 | C. Kevin Mcarthur | Director | 19,465 | 0 | 19,465 | 0.0% | 02 Sep, 2026 |
| 18 | Peter Adamek | Vice President Cfo | 12,171 | 0 | 12,171 | 0.0% | 02 Jul, 2026 |
| 19 | Thomas Scott Kaplan | Director | 11,710 | 0 | 11,710 | 0.0% | 30 Nov, 2023 |
| 20 | Ali Erfan | Director | 5,048 | 0 | 5,048 | 0.0% | 02 Sep, 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 |
|---|---|---|---|---|---|---|---|---|
| 01 Sep, 2026 | Thomas Scott Kaplan | Director | Acquired A | 1,151 | $0.00 | $0 | 120,419 | Direct |
| 01 Sep, 2026 | C. Kevin Mcarthur | Director | Acquired A | 576 | $0.00 | $0 | 19,465 | Direct |
| 01 Sep, 2026 | Ali Erfan | Director | Acquired A | 1,151 | $0.00 | $0 | 5,048 | Direct |
| 01 Sep, 2026 | Elaine J Dorward-King | Director | Acquired A | 1,151 | $0.00 | $0 | 38,583 | Direct |
| 01 Sep, 2026 | Dawn Patricia Whittaker | Director | Acquired A | 1,151 | $0.00 | $0 | 25,869 | Direct |
| 01 Sep, 2026 | Quintanilla Daniel Muniz | Director | Acquired A | 1,151 | $0.00 | $0 | 48,339 | Direct |
| 01 Sep, 2026 | Kalidas V Madhavpeddi | Director | Acquired A | 576 | $0.00 | $0 | 63,858 | Direct |
| 01 Sep, 2026 | Ethan Schutt | Director | Acquired A | 576 | $0.00 | $0 | 54,798 | Direct |
| 01 Sep, 2026 | Hume D. Kyle | Director | Acquired A | 1,151 | $0.00 | $0 | 26,637 | Direct |
| 30 Jun, 2026 | Peter Adamek | Vice President Cfo | Acquired A | 889 | $8.69 | $7.73K | 12,171 | Direct |
| 30 Jun, 2026 | Richard Alan Williams | Vice President Coo | Acquired A | 994 | $8.69 | $8.64K | 452,530 | Direct |
| 30 Jun, 2026 | Gregory A. Lang | President And Ceo | Acquired A | 1,909 | $8.69 | $16.59K | 113,245 | Direct |
| 01 Jun, 2026 | Thomas Scott Kaplan | Director | Acquired A | 1,302 | $0.00 | $0 | 119,268 | Direct |
| 01 Jun, 2026 | Hume D. Kyle | Director | Acquired A | 1,302 | $0.00 | $0 | 25,486 | Direct |
| 01 Jun, 2026 | C. Kevin Mcarthur | Director | Acquired A | 651 | $0.00 | $0 | 18,889 | Direct |
| 01 Jun, 2026 | Quintanilla Daniel Muniz | Director | Acquired A | 1,302 | $0.00 | $0 | 47,188 | Direct |
| 01 Jun, 2026 | Ethan Schutt | Director | Acquired A | 651 | $0.00 | $0 | 54,222 | Direct |
| 01 Jun, 2026 | Dawn Patricia Whittaker | Director | Acquired A | 1,302 | $0.00 | $0 | 24,718 | Direct |
| 01 Jun, 2026 | Kalidas V Madhavpeddi | Director | Acquired A | 651 | $0.00 | $0 | 63,282 | Direct |
| 01 Jun, 2026 | Elaine J Dorward-King | Director | Acquired A | 1,302 | $0.00 | $0 | 37,432 | Direct |