CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
Net sales	$ 40,272	$ 37,971
Cost of sales	28,109	28,304
Gross margin	12,163	9,667
Selling, general and administrative expense	6,294	5,952
Corporate expense	2,721	2,359
Income from operations	3,148	1,356
Equity in earnings of Kronos Worldwide, Inc.	5,525	2,476
Other income (expense):
Interest and dividend income	2,038	2,551
Marketable equity securities	(8,552)	2,383
Other components of net periodic pension and OPEB cost	(285)	(318)
Interest expense	(575)	(145)
Income before income taxes	1,299	8,303
Income tax expense (benefit)	(23)	988
Net income	1,322	7,315
Noncontrolling interest in net income of subsidiary	655	476
Net income attributable to NL stockholders	$ 667	$ 6,839
Amounts attributable to NL stockholders:
Net income per basic share	$ 0.01	$ 0.14
Net income per diluted share	$ 0.01	$ 0.14
Weighted average shares outstanding - basic	48,848	48,833
Weighted average shares outstanding - diluted	48,848	48,833