| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| King Scott A | President and CEO, Director | 600 SOUTH AIRPORT ROAD, MANSFIELD | Scott A. King BY:/s/Brigette A. Burnell Attorney-in-Fact | 05 Mar 2026 | 0001703109 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GRC | Common Stock | Tax liability | -9,211 | -11% | $0.000000* | 76,660 | 03 Mar 2026 | Direct | F1, F2, F3 | |
| holding | GRC | Common Stock (401-K Plan) | 2,135 | 03 Mar 2026 | By 401-K Trust |
| Id | Content |
|---|---|
| F1 | Shares withheld for payment of tax liability on vesting of 22,932 stock units. |
| F2 | Balance includes 19,833 unvested stock units granted under the Company's equity incentive plans. |
| F3 | Balance reflects 9 shares of common stock acquired under the Company's Employee Stock Purchase Plan between February 26, 2026 and March 3, 2026. |