2025-10-24T10:21:20+00:00 2024-12-31 440160260 Forvis Mazars LLP 910 E St Louis 200 PO Box 1190 Springfield MO 658062523 990 2024-01-01 320430913 ONE Gas Inc NBU VEBA Master Trust ONEG 9189477000 15 EAST FIFTH ST TULSA OK 74103 MARK W SMITH VP & TREASURER 9189477000 2025-10-24 true Krystal Creach P01248198 4178658701 2025-10-24 2024 2025-03-06 01:10:19Z MARK W SMITH 15 EAST FIFTH ST TULSA OK 74103 8812738 false X WWW.ONEGAS.COM X 2014 OK THE VEBA TRUST IS THE FUNDING VEHICLE FOR THE PLAN SPONSOR'S PAYMENT OF MEDICAL BENEFITS FOR CERTAIN RETIRED EMPLOYEES AND THEIR DEPENDENTS. 1 1 0 0 398121 357045 0 0 12438388 8414617 314647 398121 0 0 12753035 8812738 0 0 8637243 7467154 0 0 0 0 0 620986 649793 9258229 8116947 3494806 695791 88693860 90185477 0 0 88693860 90185477 THE VEBA TRUST IS THE FUNDING VEHICLE FOR THE PLAN SPONSOR'S PAYMENT OF MEDICAL BENEFITS FOR CERTAIN RETIRED EMPLOYEES AND THEIR DEPENDENTS. false false THE VEBA TRUST IS THE FUNDING VEHICLE FOR THE PLAN SPONSOR'S PAYMENT OF MEDICAL BENEFITS FOR CERTAIN RETIRED EMPLOYEES AND THEIR DEPENDENTS. 0 false false false false false false false false false false false true false false false false false false false false false false false false false false false false false false false false false false false false false false false false false false false false false true false false false false true 0 0 0 true true false false false false false false false X 1 1 false false false false false false false true true false false false false false false false false false false false false false X ONE GAS INC 9189477000 15 EAST FIFTH STREET TULSA OK 74103 US BANK TRUSTEE 1.0 0.0 X 22468 0 0 22468 0 0 false false false UNITED HEALTHCARE INSURANCE COMPANY 5800 GRANITE PARKW SUITE 700 PLANO TX 75024 CLAIMS ADMIN 101550 1 0 REINSURANCE PROCEEDS 525100 5879826 5879826 EMPLOYER/EMPLOYEE CONTRIBUTIONS 525100 2534791 2534791 0 0 0 0 8414617 398121 398121 0 0 0 0 0 0 0 0 0 0 8812738 8414617 398121 0 7467154 193014 TPA ADMINISTRATIVE FEES 434311 TRUSTEE FEES 22468 0 8116947 8589601 9257294 0 0 0 0 0 0 0 0 80104259 80897421 0 0 30762 88693860 90185477 0 0 0 0 0 0 X 88693860 90185477 88693860 90185477 88693860 90185477 X 695791 795826 X false false false Closely-held equity interests Financial derivatives ENERGY INSURANCE LTD POLICY 80897421 C 80897421 Form 990, Part VI, Line 11b Review of form 990 by governing body THE RETURN WAS PREPARED AND REVIEWED BY AN OUTSIDE ACCOUNTING FIRM AND THEN REVIEWED BY MANAGEMENT BEFORE FILING WITH THE IRS. Form 990, Part VI, Line 19 Required documents available to the public THE ORGANIZATION MAKES AVAILABLE UPON REQUEST DOCUMENTS SUBMITTED WITH FORM 1024. Form 990, Part XI, Line 9 Other changes in net assets or fund balances CHANGES IN CSV OF EIS POLICY - 795826; Total - 795826; ONE GAS INC 15 EAST FIFTH STREET TULSA OK 74103 463561936 NATURAL GAS D OK NA C Corporation 0 0 0 false false false false false false false false false false false false false false false false false false false true