The following table sets forth the components of other income and other expense for the periods indicated:
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended | | Six Months Ended | | | June 30, | | June 30, | | | 2026 | | 2025 | | 2026 | | 2025 | | | | | (Thousands of dollars) | | | Net periodic benefit (cost) credit other than service cost | $ | (972) | | | $ | 356 | | | $ | (2,125) | | | $ | 688 | | | | | | Gain (loss) on investments associated with nonqualified deferred compensation plans | 3,739 | | | 2,062 | | | 3,001 | | | 2,209 | | | | | | Unrealized gain (loss) on marketable equity securities | 372 | | | 184 | | | 250 | | | 184 | | | | | | Credit due to change in federal tax regulation for securitization (a) | 2,390 | | | — | | | 2,390 | | | — | | | | | | Other income (expense), net | (309) | | | (30) | | | (393) | | | 9 | | | | | | Total other income (expense), net | $ | 5,220 | | | $ | 2,572 | | | $ | 3,123 | | | $ | 3,090 | | | | |
(a) See Note 10 for additional detail.
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