KOP · Koppers Holdings Inc.

0001315257-26-000030

Summary

Koppers Holdings Inc. amended its prior 8-K filing to disclose that the Board appointed Laura J. Posadas to three key committees effective May 7, 2026.

Key takeaways

On November 5, 2025, Koppers Holdings Inc. elected Laura J. Posadas to its Board of Directors.
This 8-K/A amends the original filing to specify Ms. Posadas' committee assignments.
On May 7, 2026, the Board appointed Ms. Posadas to the Audit Committee.
Ms. Posadas appointed to Management Development and Compensation Committee.
Ms. Posadas appointed to Strategy and Risk Committee, effective immediately.

Full analysis

This amendment provides clarity on the committee assignments for newly elected director Laura J. Posadas, whose initial election was reported in the original 8-K on November 5, 2025. Her appointments to the Audit, Management Development and Compensation, and Strategy and Risk Committees enhance board oversight in critical areas including financial reporting, executive compensation, and strategic risk management, signaling strengthened governance structure.