| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Niewiem Sandra | Sr. VP Global Specialties | C/O ORION ENGINEERED CARBONS LLC, 1700 CITY PLAZA DRIVE, SUITE 300, SPRING | /s/ Sandra Niewiem | 23 Feb 2026 | 0001797804 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | OEC | Common Shares, no par value | Tax liability | $16,691 | -2,662 | -9.9% | $6.27 | 24,255 | 19 Feb 2026 | Direct | F1 |
| transaction | OEC | Common Shares, no par value | Award | $0 | +5,952 | +25% | $0.000000 | 30,207 | 19 Feb 2026 | Direct | F2 |
| transaction | OEC | Common Shares, no par value | Tax liability | $17,725 | -2,827 | -9.4% | $6.27 | 27,380 | 19 Feb 2026 | Direct | F3 |
| Id | Content |
|---|---|
| F1 | Shares withheld by the Issuer to satisfy tax withholding requirements on vesting of restricted stock units. |
| F2 | Represents the vesting and settlement of performance-based restricted stock units in shares of common stock following the satisfaction of certain performance criteria. |
| F3 | Shares withheld by the Issuer to satisfy tax withholding requirements on vesting of performance-based restricted stock units. |