NewMarket Corporation: Inside the Petroleum Additives Slowdown; What’s Really Driving Profit Compression?

NewMarket Corporation’s financial results for 2025 present a mixed landscape, offering insights into both areas of strength and challenges faced by the company across its segments. The company experienced a reduction in pretax income, decreasing from $584 million in 2024 to $561 million in 2025, a 4% decline. This reduction is primarily attributed to a heightened effective tax rate which significantly impacted net income and earnings per share. Net income fell from $462 million in 2024 to $419 million in 2025, with earnings per share dropping from $48.22 to $44.44. The financial results were further affected by the Petroleum Additives segment, which saw a decline in sales and operating profit. Fourth-quarter sales in this segment were $585 million in 2025, down from $626 million in 2024, while operating profit dropped to $107 million from $136 million. The full-year figures reflected a similar trend, with sales reducing from $2.