Stockholders' equity

3 Months Ended

Mar. 31, 2024

Stockholders' equity

Stockholders' equity

Note 12 – Stockholders’ equity:

Accumulated other comprehensive loss - Changes in accumulated other comprehensive loss attributable to NL stockholders, including amounts resulting from our investment in Kronos Worldwide (see Note 5), are presented in the table below.

	Three months ended
	March 31,
	2023		2024
	(In thousands)
Accumulated other comprehensive loss, (net of tax and noncontrolling interest):
Currency translation:
Balance at beginning of period	$	(178,191)	$	(177,119)
Other comprehensive loss		(1,666)		(4,966)
Balance at end of period	$	(179,857)	$	(182,085)
Defined benefit pension plans:
Balance at beginning of period	$	(43,857)	$	(41,373)
Other comprehensive income -
Amortization of prior service cost and net losses included in   net periodic pension cost		393		379
Balance at end of period	$	(43,464)	$	(40,994)
OPEB plans:
Balance at beginning of period	$	(893)	$	(1,114)
Other comprehensive loss -
Amortization of net gain included in net periodic   OPEB cost		(60)		(47)
Balance at end of period	$	(953)	$	(1,161)
Marketable debt securities:
Balance at beginning of period	$	(50)	$	(15)
Other comprehensive income (loss) - unrealized gain (loss) arising during the period		(44)		15
Balance at end of period	$	(94)	$	—
Total accumulated other comprehensive loss:
Balance at beginning of period	$	(222,991)	$	(219,621)
Other comprehensive loss		(1,377)		(4,619)
Balance at end of period	$	(224,368)	$	(224,240)

See Note 10 for amounts related to our defined benefit pension plans.