| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Taylor Stephen Charles | Director | 404 VETERANS AIRPARK LANE, SUITE 300, MIDLAND | Stephen C. Taylor | 05 Dec 2025 | 0001316004 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | NGS | Common Stock | Sale | -$642K | -20K | -6.34% | $32.12 | 295K | 04 Dec 2025 | Direct | F1 |
| holding | NGS | Common Stock | 114K | 04 Dec 2025 | Rabbi Trust |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| holding | NGS | Restricted Stock Units | 4.46K | 04 Dec 2025 | Common Stock | 4.46K | Direct | F2 |
| Id | Content |
|---|---|
| F1 | The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $31.83 to $32.28 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. |
| F2 | Not applicable. Each Restricted Stock Unit represents the right to receive one share of the Issuer's common stock upon vesting. |