Company: ATO
Filing Date: 2025-11-14
Form Type: 10-K
Source: 0000731802-25-000056
Chunk: 123

Company: ATMOS ENERGY CORP
Filing Date: 2025-11-14
Form: 10-K
Item: Item 8
Chunk 123
---
 presents asset allocation information for the Retiree Medical Plan assets as of September 30, 2025 and 2024. ActualAllocationSeptember 30Security Class20252024Diversified investment funds98.6%97.8%Cash and cash equivalents1.4%2.2%We review the estimates and assumptions underlying our Retiree Medical Plan annually based upon a September 30 measurement date using the same techniques as our Pension Plan and Supplemental Plans. The actuarial assumptions used to determine the postretirement asset for our Retiree Medical Plan were determined as of September 30, 2025 and 2024 and the actuarial assumptions used to determine the net periodic postretirement cost for the Retiree Medical Plan were determined as of September 30, 2024, 2023, and 2022. 

70

Table of ContentsATMOS ENERGY CORPORATIONNOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The assumptions are presented in the following table: PostretirementAssetPostretirement Cost 20252024202520242023Discount rate5.47 %5.01 %5.01 %6.06 %5.61 %Expected return on plan assets5.14 %5.14 %5.14 %4.94 %4.94 %Initial trend rate7.00 %6.75 %6.75 %6.50 %6.25 %Ultimate trend rate5.00 %5.00 %5.00 %5.00 %4.75 %Ultimate trend reached in20342032203220302029The following table presents the Retiree Medical Plan’s benefit obligation and funded status as of September 30, 2025 and 2024:20252024 (In thousands)Change in benefit obligation:Benefit obligation at beginning of year$269,391 $234,004 Service cost8,132 6,028 Interest cost13,463 14,034 Plan participants’ contributions1,993 2,102 Actuarial (gain) loss(8,733)31,135 Benefits paid(19,065)(17,912)Plan amendments1,873 — Benefit obligation at end of year267,054 269,391 Change in plan assets:Fair value of plan assets at beginning of year300,