OGS tangible book value per share history

Annual fiscal periods. Dates are reporting period ends; fiscal years can differ from calendar years.

One Gas Inc Tangible Book Value Per Share — Annual fiscal periods
Period ending	Tangible Book Value Per Share
Dec 31, 2025	50.6704
Dec 31, 2024	47.1737
Dec 31, 2023	41.6242
Dec 31, 2022	38.789
Dec 31, 2021	40.9067
Dec 31, 2020	39.0597
Dec 31, 2019	37.2708
Dec 31, 2018	35.7676
Dec 31, 2017	34.311
Dec 31, 2016	32.9881
Dec 31, 2015	32.021
Dec 31, 2014	31.2444
Dec 31, 2013	20.951
Dec 31, 2012	19.3607
Dec 31, 2011	19.4298
Dec 31, 2010	0