Company: MT
Filing Date: 2025-03-10
Form Type: 20-F
Source: 0001243429-25-000017
Chunk: 453

Company: ArcelorMittal
Filing Date: 2025-03-10
Form: 20-F
Chunk 453
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13 |     |                             504 |
| 100basis points increase in discount rate                |                                                                            11 |     |                            -414 |
| 100basis points decrease in rate of compensation         |                                                                           -11 |     |                            -105 |
| 100basis points increase in rate of compensation         |                                                                            12 |     |                             108 |
| 1year increase of the expected life of the beneficiaries |                                                                             6 |     |                             105 |

The following table illustrates the sensitivity to a change of the significant actuarial assumptions related to ArcelorMittal’s OPEB plans

(as of December 31, 2024 the defined benefit obligation for post-employment benefit plans was 888 ):

|                                                          | Effect on 2025 Pre-Tax OPEB Expense(sum of service cost and interest cost) |     | Effect on December 31, 2024 DBO |
|:---------------------------------------------------------|---------------------------------------------------------------------------:|:----|--------------------------------:|
| Change in assumption                                     |                                                                            |     |                                 |
| 100basis points decrease in discount rate                |                                                                         -1 |     |                             109 |
| 100basis points increase in discount rate                |                                                                          — |     |                             -88 |
| 100basis points decrease in healthcare cost trend rate   |                                                                         -4 |     |                             -51 |
| 100basis points increase in healthcare cost trend rate   |                                                                          4 |     |                              63 |
| 1year increase of the expected life of the beneficiaries |                                                                          1 |     |                              14 |

The above sensitivities reflect the effect of changing one

assumption at a time. Actual economic factors and conditions

often affect multiple assumptions simultaneously, and the effects

of changes in key assumptions are not necessarily linear.

8.3 Share-based payments ArcelorMittal issues equity-settled share-based payments to certain employees which are RSUs and PSUs. Equity-settled share-based payments are measured at fair value (excluding the effect of non market-based vesting conditions) at the grant date. The fair value determined at the grant date of the equity- settled share-based payments is expensed on a graded vesting basis over the vesting period, based on the Company’s estimate of the shares that will eventually vest and adjusted for the effect of non market-based vesting conditions. Where the fair value calculation requires modeling of the Company’s performance against other market index, fair value is measured using the Monte Carlo pricing model to estimate the forecasted