Koppers Holdings Reports First-Quarter Results and Announces Leadership Transition

PITTSBURGH, May 8, 2026 — Koppers Holdings Inc. reported its first-quarter 2026 financial results and disclosed costs tied to exit or disposal activities in an 8-K filing with the Securities and Exchange Commission.

The filing, submitted under Items 2.02, 2.05, 5.02, 5.07, 7.01 and 9.01, includes Regulation FD disclosure and exhibits. Item 2.02 covers results of operations and financial condition while Item 2.05 addresses costs associated with exit or disposal activities. Koppers did not quantify the charges or specify the affected business units in the structured summary.

Under Item 5.02 the company reported the departure of a principal officer. The named individual left the role with an effective date of May 8, 2026. The filing cites no cause for the departure. No successor election appears in the disclosed items.

Item 5.07 records the submission of matters to a vote of security holders at the annual meeting. Specific vote tallies and proposals were included in the exhibits per Item 9.01.

WHAT IT CHANGES: The principal-officer departure shifts executive responsibilities immediately. Prior to May 8 the officer held the position; afterward the duties transfer under the company’s existing succession framework until a permanent replacement is named and disclosed in a subsequent filing.

Exit and disposal activities referenced in Item 2.05 will produce recognized costs in the current or next quarter, altering the company’s reported operating expenses from their prior baseline.

WHY IT MATTERS DOWNSTREAM: The leadership change requires Koppers to file any material contract or compensatory arrangements connected to the departure within four business days under Item 5.02 rules. Costs from exit activities must be quantified and explained in the next periodic report or in an amended 8-K.

Shareholders who voted at the annual meeting gain formal ratification of board and auditor matters, closing the annual governance cycle and starting the clock on any required proxy-statement updates. The Regulation FD disclosure ensures that any material nonpublic information released in connection with the results or leadership announcement has been publicly disseminated.

This marks the latest executive transition at Koppers, a chemicals and materials company whose shares trade on the New York Stock Exchange under ticker KOP. The 8-K represents the official record of the financial results, costs, personnel change and shareholder votes; separate financial statements and press releases were furnished as exhibits.