Koppers Holdings Inc. 8-K/A

What Happened
Koppers Holdings Inc. filed an amended Current Report on Form 8-K/A dated March 18, 2026, amending a prior report related to Item 5.02 (Departure of Directors or Certain Officers; Election of Directors). The earliest event reported in the filing occurred on January 5, 2026. The amendment is signed by Bradley A. Pearce, Interim Chief Financial Officer and Chief Accounting Officer.

Key Details

• Filing type: Form 8-K/A (amendment) filed March 18, 2026.
• Event date (earliest reported): January 5, 2026.
• Item reported: 5.02 — Departure of Directors or Certain Officers; Election of Directors.
• Exhibit included: 104 — Cover Page Interactive Data File (Inline XBRL) embedded in the filing.
• Signing executive: Bradley A. Pearce, Interim CFO & Chief Accounting Officer.

Why It Matters
Changes in directors or senior officers are material governance events that can affect company leadership, strategy, and investor confidence. This filing updates Koppers’ disclosure record; investors should review the original Jan. 5, 2026 8-K and any related press releases or subsequent filings for the specific names, roles, and transition details to assess any operational or financial impact.