| Date | Owner | Type | Security | Price | Units | Value | |
|---|---|---|---|---|---|---|---|
| Montrone Paul M | J | Class B Common Stock | |||||
| Montrone Paul M | J | Class B Common Stock | |||||
| Montrone Paul M | J | Common Stock | |||||
| Montrone Paul M | J | Common Stock | |||||
| Montrone Paul & Sandra 2001 Descendants Trust | J | Class B Common Stock |