Koppers Holdings Inc.

$77.5 Million in Prior Year Quarter • Year-to-date capital expenditures of $26.4 Million vs.

SEC original ↗Koppers Holdings Inc. — Earnings release (8-K exhibit)EX-99Aug 8, 2025

$43.4 Million in Prior Year Period • Year-to-date capital expenditures, net of insurance proceeds and sale of assets, of $21.7 Million vs.

SEC original ↗Koppers Holdings Inc. — Earnings release (8-K exhibit)EX-99Aug 8, 2025

Finally, strong operating cash flow and lower capital expenditures enabled us to reduce debt and return capital to shareholders through share repurchases and quarterly dividends.

SEC original ↗Koppers Holdings Inc. — Earnings release (8-K exhibit)EX-99Aug 8, 2025

2 2025 Forecast 2024 Actual Net sales $1.9 - $2.0 billion $2.09 billion Adjusted EBITDA $250 - $270 million $261.6 million Effective tax rate 30% 26% Adjusted EPS $4.00 - $4.60 $4.11 Operating cash flow $150 million $119.4 million Capital expenditures $52 - $58 million $77.4 million The forecasted operating cash flow includes any impact from planned pension terminations and other special items.

SEC original ↗Koppers Holdings Inc. — Earnings release (8-K exhibit)EX-99Aug 8, 2025

We plan to use the majority of the free cash flow generated over the back half of this year to reduce borrowings.

SEC original ↗Koppers Holdings Inc. — Earnings release (8-K exhibit)EX-99Aug 8, 2025

Any forward-looking statement contained herein, in other press releases, written statements or other documents filed with the Securities and Exchange Commission, or in Koppers communications and discussions with investors and analysts in the normal course of business through meetings, phone calls and conference calls, regarding future dividends, expectations with respect to sales, earnings, cash flows, operating efficiencies, restructurings, cost reduction efforts, product introductions or expansions, the benefits of acquisitions, divestitures, joint ventures or other matters as well as financings and debt reduction, are subject to known and unknown risks, uncertainties and contingencies.

SEC original ↗Koppers Holdings Inc. — Earnings release (8-K exhibit)EX-99Aug 8, 2025

Although the company expects to realize significant benefit in 2025 from its cost reduction initiatives, current market conditions are reflecting a continued reduction in demand.

SEC original ↗Koppers Holdings Inc. — Earnings release (8-K exhibit)EX-99Aug 8, 2025

This presentation is consistent with how our chief operating decision maker evaluates the results of operations and makes strategic decisions about the business.

SEC original ↗Koppers Holdings Inc. — 10-Q Quarterly report10-QAug 6, 2026

Borrowings under the Credit Facility are secured by a first priority lien on substantially all of the assets (excluding real property and other customary assets) of Koppers Inc.

SEC original ↗Koppers Holdings Inc. — 10-Q Quarterly report10-QAug 6, 2026

in the United States is listed on the National Priorities List promulgated under the Comprehensive Environmental Response, Compensation, and Liability Act of 1980, as amended (CERCLA).

SEC original ↗Koppers Holdings Inc. — 10-Q Quarterly report10-QAug 6, 2026

Currently, at the properties acquired from Beazer East, which includes the National Priorities List site and all but one of which are permitted under the Resource Conservation and Recovery Act (RCRA), a significant portion of all investigative, cleanup and closure activities are being conducted and paid for by Beazer East pursuant to the terms of the Indemnity.

SEC original ↗Koppers Holdings Inc. — 10-Q Quarterly report10-QAug 6, 2026

2025 Outlook After considering the current competitive environment, global economic conditions, as well as the ongoing uncertainty associated with geopolitical and supply chain challenges, Koppers is revising its sales forecast to be approximately $1.9 billion to $2.0 billion, compared with $2.0 billion to $2.2 billion previously.

SEC original ↗Koppers Holdings Inc. — Earnings release (8-K exhibit)EX-99Aug 8, 2025

All forward-looking statements involve risks and uncertainties.

SEC original ↗Koppers Holdings Inc. — Earnings release (8-K exhibit)EX-99Aug 8, 2025

Any forward-looking statement contained herein, in other press releases, written statements or other documents filed with the Securities and Exchange Commission, or in Koppers communications and discussions with investors and analysts in the normal course of business through meetings, phone calls and conference calls, regarding future dividends, expectations with respect to sales, earnings, cash flows, operating efficiencies, restructurings, cost reduction efforts, product introductions or expansions, the benefits of acquisitions, divestitures, joint ventures or other matters as well as financings and debt reduction, are subject to known and unknown risks, uncertainties and contingencies.

SEC original ↗Koppers Holdings Inc. — Earnings release (8-K exhibit)EX-99Aug 8, 2025

Many of these risks, uncertainties and contingencies are beyond our control, and may cause actual results, performance or achievements to differ materially from anticipated results, performance or achievements.

SEC original ↗Koppers Holdings Inc. — Earnings release (8-K exhibit)EX-99Aug 8, 2025

Commitments and Contingent Liabilities We are involved in litigation and various proceedings relating to environmental laws and regulations, product liability and other matters.

SEC original ↗Koppers Holdings Inc. — 10-Q Quarterly report10-QAug 6, 2026

The ultimate resolution of these contingencies is subject to significant uncertainty and should we fail to prevail in any of these legal matters or should several of these legal matters be resolved against us in the same reporting period, these legal matters could, individually or in the aggregate, be material to the condensed consolidated financial statements.

SEC original ↗Koppers Holdings Inc. — 10-Q Quarterly report10-QAug 6, 2026