| 2026-02-19 | Document | |
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| 2026-02-19 | 1.ONE Gas Properties, L.L.C., an Oklahoma limited liability company. | |
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| 2026-02-19 | 2.Utility Insurance Company, an Oklahoma company. | |
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| 2026-02-19 | 3.Kansas Gas Service Securitization I, L.L.C., a Delaware limited liability company. | |
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| 2025-02-20 | Document | |
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| 2025-02-20 | 1.ONE Gas Properties, L.L.C., an Oklahoma limited liability company. | |
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| 2025-02-20 | 2.Utility Insurance Company, an Oklahoma company. | |
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| 2025-02-20 | 3.Kansas Gas Service Securitization I, L.L.C., a Delaware limited liability company. | |
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| 2024-02-22 | Document | |
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| 2024-02-22 | 1.ONE Gas Properties, L.L.C., an Oklahoma limited liability company. | |
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| 2024-02-22 | 2.Utility Insurance Company, an Oklahoma company. | |
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| 2024-02-22 | 3.Kansas Gas Service Securitization I, L.L.C., a Delaware limited liability company. | |
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| 2023-02-23 | Document | |
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| 2023-02-23 | 1.ONE Gas Properties, L.L.C., an Oklahoma limited liability company. | |
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| 2023-02-23 | 2.Utility Insurance Company, an Oklahoma company. | |
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| 2023-02-23 | 3.Kansas Gas Service Securitization I, L.L.C., a Delaware limited liability company. | |
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| 2022-02-24 | Document | |
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| 2022-02-24 | 1.ONE Gas Properties, L.L.C., an Oklahoma limited liability company. | |
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| 2022-02-24 | 2.Utility Insurance Company, an Oklahoma company. | |
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| 2021-02-26 | Document | |
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| 2021-02-26 | 1.ONE Gas Properties, L.L.C., an Oklahoma limited liability company. | |
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| 2021-02-26 | 2.Utility Insurance Company, an Oklahoma company. | |
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| 2020-02-20 | ONE Gas Properties, L.L.C., an Oklahoma limited liability company. | |
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| 2020-02-20 | Utility Insurance Company, an Oklahoma company. | |
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| 2019-02-20 | ONE Gas Properties, L.L.C., an Oklahoma limited liability company. | |
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| 2019-02-20 | Utility Insurance Company, an Oklahoma company. | |
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| 2018-02-22 | ONE Gas Properties, L.L.C., an Oklahoma limited liability company. | |
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| 2018-02-22 | Utility Insurance Company, an Oklahoma company. | |
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| 2017-02-23 | ONE Gas Properties, L.L.C., an Oklahoma limited liability company. | |
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| 2016-02-18 | ONE Gas Properties, L.L.C., an Oklahoma limited liability company. | |
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| 2015-02-19 | SUSIDIARIES OF ONE GAS, INC. | |
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| 2015-02-19 | OGS 10-K 2014 Exhibit 21.1 | |
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| 2015-02-19 | ONE Gas Properties, L.L.C., an Oklahoma limited liability company. | |
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| 2014-02-25 | OGS 10-K 2013 Exhibit 21.1 | |
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| 2014-02-25 | ONE Gas Properties, L.L.C., an Oklahoma limited liability company. | |
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