Koppers Q3 2026 Earnings: Higher Costs Offset Sales Growth

Koppers (NYSE: KOP) reported Q3 2026 net sales of $499.1 million, up 2.8% from $485.3 million, while diluted EPS fell 35.9% to $0.75 from $1.17. Adjusted EBITDA declined 18.2% to $58.0 million as higher raw material and logistics costs more than offset volume growth, even as nine-month operating and free cash flow reached record levels. The results cover the quarter ended September 30, 2026.

Core Earnings Data

Sales growth came primarily from higher volumes of residential and industrial wood preservatives, Class I crossties, and U.S. utility poles. Currency translation added $6.1 million to sales, while lower Class I crosstie pricing partially offset these gains.

Profit moved in the opposite direction. Higher raw material and logistics costs drove most of the adjusted EBITDA decline, while selling, general and administrative expenses increased by $3.4 million because of higher compensation and technology costs.

Business and Segment Performance

Performance Chemicals was the only segment to increase both sales and adjusted EBITDA. Railroad and Utility Products and Services posted essentially flat sales but lower profitability, while Carbon Materials and Chemicals recorded the largest margin deterioration.

Railroad and Utility Products and Services benefited from higher crosstie volumes and a 5% volume increase in the domestic utility pole business, including an acquired pole procurement operation. Lower crosstie pricing, higher raw material and administrative costs, and the prior-year sale of a railroad services business reduced profitability. Its adjusted EBITDA margin fell from 12.5% to 9.6%.

Performance Chemicals sales increased on 10% volume growth, primarily in the Americas, supported by market-share gains and inventory restocking. Higher volume and factory utilization outweighed $4.7 million of additional raw material costs, mainly related to scrap copper after hedging benefits.

Carbon Materials and Chemicals was pressured by lower carbon pitch volume, $9.0 million of higher raw material costs, and a $1.7 million utilization headwind. Feedstock quality issues in North America and the accelerated closure of the Stickney facility contributed to the utilization decline. Price increases for carbon pitch and carbon black feedstock provided only a partial offset.

Higher Input Costs Overwhelmed Volume Gains, but Working Capital Supported Cash Flow

Koppers generated $13.8 million of additional quarterly sales, but cost of sales increased by $31.6 million to $399.9 million. As a result, GAAP operating profit declined to $30.4 million, and the operating margin was approximately 6.1%, compared with approximately 10.7% a year earlier. The decline in adjusted EBITDA confirms that the pressure extended beyond restructuring and other GAAP adjustments.

Cash flow was more favorable. Nine-month operating cash flow reached $126.9 million despite lower underlying earnings, reflecting improved working capital, lower inventory, and the timing of customer receipts and vendor payments. The prior-year period also included approximately $14 million of pension funding. After $34.9 million of capital expenditures, free cash flow was $92.0 million.

The nine-month GAAP net loss of $125.7 million included $233.4 million of impairment, restructuring, and plant closure expenses, a substantial portion of which was noncash. Inventory declined to $387.3 million from $411.2 million at the end of 2025, while total debt decreased by $31.0 million to $888.2 million and net debt fell by $35.8 million to $845.4 million. Koppers also returned $56.2 million to shareholders during the nine-month period.

2026 Guidance

Koppers reduced its 2026 profit outlook after raw material and logistics costs increased more quickly than the company could recover through commercial actions. The company maintained operating cash flow guidance and raised free cash flow guidance, supported by working-capital initiatives and lower planned capital spending.

Management expects elevated input costs and weaker end-market demand to continue pressuring margins through the remainder of 2026. Commercial actions taking effect in 2027, along with benefits from the accelerated Stickney closure and the idling of the Florence treating plant, are intended to support subsequent earnings improvement. Adjusted EBITDA, adjusted EPS, and free cash flow are non-GAAP measures for which the company did not provide forward reconciliations.

Recent Insider Transactions

Data supplied for the latest six-month period show insider purchases of 31,146 shares across 14 transactions and sales of 108,020 shares across nine transactions. That represents net selling of 76,874 shares, equal to 5.40% of approximately 1.35 million total insider shares held.

The latest 10 reported records consist of eight sales and two stock gifts. The disclosed value of the eight sales totals approximately $5.18 million.

These disclosures establish the transactions but do not provide the insiders’ reasons or indicate their views on the company’s outlook.

Risks Investors Should Watch

• Input-cost recovery: Raw material, logistics, and energy costs are rising faster than Koppers can currently recover them through pricing, directly pressuring adjusted EBITDA and margins.
• End-market and pricing pressure: Weaker demand and lower Class I crosstie pricing could limit the benefit of higher volumes, particularly in Railroad and Utility Products and Services.
• Operational execution: Feedstock quality problems, lower utilization, and the execution of facility closures could continue affecting Carbon Materials and Chemicals profitability.
• Cash-flow sustainability: Part of the nine-month cash-flow improvement came from payment timing and lower inventory, making the durability of working-capital benefits an important point to monitor.
• Timing of restructuring benefits: Management expects major commercial and production-network benefits to become more visible in 2027, leaving 2026 results exposed to continued near-term cost pressure.

Conclusion

Koppers produced modest Q3 sales growth and record nine-month cash flow, but higher input and logistics costs caused a clear decline in quarterly earnings and margins. Performance Chemicals provided the main operating offset, while the other two segments recorded weaker profitability. The key issues ahead are whether Koppers can recover costs through pricing, complete its production-network changes, and sustain cash generation while working toward the reduced earnings outlook.