sales volumes, primarily in its European, North American and Latin American markets. Kronos ended 2025 with average TiO2 selling prices 10% lower than the beginning of the year. Kronos’ average TiO2 selling prices were 8% lower in the fourth quarter of 2025 as compared to the fourth quarter of 2024 and 4% lower for the full year of 2025 as compared to the full year of 2024. Fluctuations in currency exchange rates (primarily the euro) also affected Kronos’ comparisons, increasing net sales by approximately $13 million in the fourth quarter of 2025 and by approximately $24 million in the full year of 2025 as compared to the same prior year periods. The table at the end of this press release shows how each of these items impacted Kronos’ net sales.
Kronos’ loss from operations in the fourth quarter of 2025 was $63.1 million as compared to income from operations of $28.6 million in the fourth quarter of 2024. For the full year of 2025, Kronos’ loss from operations was $36.5 million as compared to income from operations of $122.9 million in 2024. Kronos’ income from operations decreased in the fourth quarter of 2025 compared to the fourth quarter of 2024 primarily due to the effects of higher unabsorbed fixed production costs resulting from reduced operating rates at its production facilities, lower average TiO2 selling prices and costs incurred related to workforce reduction initiatives of approximately $10.3 million. Kronos’ cost of sales in the fourth quarter of 2025 includes approximately $54 million of unabsorbed fixed production and other manufacturing costs associated with production curtailments at its facilities. Kronos’s income from operations decreased in the full year of 2025 compared to the full year of 2024 resulting from approximately $111 million of unabsorbed fixed production costs recognized as a result of reduced operating rates at its production facilities, partially offset by lower production costs, primarily raw materials. Kronos operated its production facilities at overall average capacities of 77% of practical capacity utilization in the full year of 2025 (93%, 81%, 80% and 55% in the first, second, third and fourth quarters of 2025, respectively) compared to 96% in the full year of 2024 (87%, 99%, 92% and 97% in the first, second, third and fourth quarters of 2024, respectively). Fluctuations in currency exchange rates (primarily the euro) decreased Kronos’ loss from operations by approximately $3 million in the fourth quarter of 2025 and $8 million for the full year of 2025 as compared to the same prior year periods.
NL’s equity in losses of Kronos for the fourth quarter and for the full year of 2025 include a loss of $2.6 million ($2.1 million, or $.04 per share, net of tax) related to Kronos’ recognition of a valuation allowance related to its German interest deduction limitation deferred tax asset, a loss of $2.2 million ($1.7 million, or $.04 per share, net of tax) due to Kronos’ settlement loss related to the termination and buy-out of its U.S. pension plan and a loss of $2.0 million ($1.5 million, or $.03 per share, net of tax) related to Kronos’ restructuring costs related to workforce reductions. In addition, NL’s equity in losses of Kronos for the full year of 2025 includes a loss of $5.9 million ($4.7 million, or $.10 per share, net of tax) related to Kronos’ non-cash deferred income tax expense reflecting the impact of the rate reduction on its net German deferred tax asset.
NL’s equity in losses of Kronos for the fourth quarter of 2024 and equity in earnings of Kronos for the full year of 2024 include a loss of $5.1 million ($4.0 million, or $.08 per share, net of tax) related to Kronos’ increased tax expense resulting from final tax regulations on the treatment of certain currency translation gains and losses, which resulted in a non-cash deferred income tax expense and a loss of $2.5 million ($2.0 million, or $.04 per share, net of tax) related to Kronos’ increased tax expense resulting from the recognition of a deferred income tax asset valuation allowance related to its Belgian net deferred tax assets, which resulted in a non-cash deferred income tax expense.
Excluding the effects of the environmental remediation settlement in the fourth quarter of 2024 discussed above, corporate expenses in the fourth quarter and for the full year of 2025 were comparable to the same periods of 2024. Interest and dividend income in the fourth quarter and for the full year of 2025 decreased $1.7 million and $4.0 million, respectively, compared to the same periods of 2024 primarily due to lower interest rates and decreased average investment balances. Marketable equity securities represent the change in unrealized gains (losses) on our portfolio of marketable equity securities during the periods.
The statements in this release relating to matters that are not historical facts are forward-looking statements that represent management's beliefs and assumptions based on currently available information. Although we believe the expectations reflected in such forward-looking statements are reasonable, we cannot give any assurances that these expectations will prove to be correct. Such statements by their nature involve substantial risks and uncertainties that could significantly impact expected results, and actual future results could differ materially from those described in such forward-looking statements. While it is not possible to identify all factors, we continue to face many risks and uncertainties. Factors that could cause actual future results to differ materially include, but are not limited to: