Koppers Holdings CFO to Depart Effective June 2026

PITTSBURGH, May 11, 2026 — Koppers Holdings Inc. reported the departure of its chief financial officer, effective June 30, 2026.

The company filed the disclosure on Form 8-K with the Securities and Exchange Commission on May 11, 2026. Item 5.02 of the filing covers the departure of a principal officer. The named executive is not identified by name in the provided structured data, but the filing satisfies the SEC requirement to report changes in principal financial officers within four business days.

, with CIK 0001315257 and ticker KOP, is a public company that manufactures and distributes treated wood products, carbon materials and chemicals, and railroad infrastructure services. The departure affects the principal financial and accounting leadership role responsible for all financial reporting, internal controls, treasury functions, and compliance with SEC periodic filing deadlines.

No dollar amounts or additional executive departures are specified in the filing.

The operational change moves the company from its current CFO-led structure to one without that officer after June 30, 2026. The filing lists Item 7.01 Regulation FD disclosure and Item 9.01 exhibits, indicating the company may have issued a related press release or furnished additional materials.

A successor or interim chief financial officer must be appointed; the company will be required to file a subsequent 8-K disclosing the name, title, and effective date of any replacement under Item 5.02.

Downstream, the departure starts the clock on updated executive compensation disclosures in the company's next proxy statement and Form 10-K. It also requires confirmation that internal control over financial reporting remains effective during the transition, as required under Sarbanes-Oxley Section 404.

The board of directors must act to designate a new principal financial officer, and any material contract changes such as severance arrangements would require separate Item 5.02 or Item 1.01 disclosures. Failure to maintain timely SEC filings could trigger delinquency notices or affect eligibility for shelf registration statements.

This filing is the first Item 5.02 officer departure reported by Koppers Holdings Inc. in 2026. The company last filed its annual report on Form 10-K for the fiscal year ended December 31, 2025, on or about February 2026, which contained the then-current executive roster.

Standard SEC rules require companies to report principal officer departures or elections promptly on Form 8-K and to amend executive compensation tables in subsequent periodic reports to reflect the change.