Apostolou Stephanie L 4
4 · Koppers Holdings Inc. · Filed Dec 17, 2025
Insider Transaction Report
Form 4
Apostolou Stephanie L
Chief Legal&Sus Officer & Sec.
Transactions
- Award
Dividend Equivalent Rights
2025-12-16+245→ 349 total→ Common Stock (245 underlying)
Footnotes (1)
- [F1]The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 208 DERs accrued with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025, and 37 DERs accrued with respect to PSUs granted on January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.