03938LAK0

The first two disclosure paragraphs of the response set forth in Item 4 of the Statement are hereby amended by deleting the paragraphs in their entirety and replacing them with the following: On April 7, 2025, ArcelorMittal announced a new share buy-back program with share repurchases to be conducted in tranches that may be announced through May 2030 (the "Buy-Back Program"). On such date, ArcelorMittal also announced its intention to repurchase up to 10,000,000 shares under the first tranche of the program. The actual amount of the ArcelorMittal Shares to be repurchased in the various tranches pursuant to the Buy-Back Program will depend on the level of post-dividend free cash flow generated over the period. To date, none of the Reporting Persons have sold any ArcelorMittal Shares in the Buy-Back Program. On March 5, 2026, ArcelorMittal and Lumen entered into a Share Repurchase Agreement (as defined below) in connection with the Buy-Back Program. On each trading day during which ArcelorMittal conducts purchases under the Buy-Back Program, ArcelorMittal and Lumen have agreed to purchase and sell, respectively, a number of ArcelorMittal Shares, such that the number of ArcelorMittal Shares so purchased and sold represents 44.6% of the sum of: (i) the total number of shares purchased by ArcelorMittal under the Buy-Back Program (other than from Lumen) and (ii) the number of ArcelorMittal Shares purchased by ArcelorMittal from Lumen pursuant to the Share Repurchase Agreement, in each case on that trading day. The foregoing summary of Lumen's undertaking to participate in the Buy-Back Program should be read in conjunction with the full text of the Share Repurchase Agreement (as defined below), a copy of which is included as Exhibit 7 to this Nineteenth Amendment and which is incorporated herein by reference. The description of the Share Repurchase Agreement as set forth in Item 6 of this Nineteenth Amendment is incorporated by reference herein.

The first two disclosure paragraphs of the response set forth in Item 4 of the Statement are hereby amended by deleting the paragraphs in their entirety and replacing them with the following: On April 7, 2025, ArcelorMittal announced a new share buy-back program with share repurchases to be conducted in tranches that may be announced through May 2030 (the "Buy-Back Program"). On such date, ArcelorMittal also announced its intention to repurchase up to 10,000,000 shares under the first tranche of the program. The actual amount of the ArcelorMittal Shares to be repurchased in the various tranches pursuant to the Buy-Back Program will depend on the level of post-dividend free cash flow generated over the period. To date, none of the Reporting Persons have sold any ArcelorMittal Shares in the Buy-Back Program. On March 5, 2026, ArcelorMittal and Lumen entered into a Share Repurchase Agreement (as defined below) in connection with the Buy-Back Program. On each trading day during which ArcelorMittal conducts purchases under the Buy-Back Program, ArcelorMittal and Lumen have agreed to purchase and sell, respectively, a number of ArcelorMittal Shares, such that the number of ArcelorMittal Shares so purchased and sold represents 44.6% of the sum of: (i) the total number of shares purchased by ArcelorMittal under the Buy-Back Program (other than from Lumen) and (ii) the number of ArcelorMittal Shares purchased by ArcelorMittal from Lumen pursuant to the Share Repurchase Agreement, in each case on that trading day. The foregoing summary of Lumen's undertaking to participate in the Buy-Back Program should be read in conjunction with the full text of the Share Repurchase Agreement (as defined below), a copy of which is included as Exhibit 7 to this Nineteenth Amendment and which is incorporated herein by reference. The description of the Share Repurchase Agreement as set forth in Item 6 of this Nineteenth Amendment is incorporated by reference herein.

The first two disclosure paragraphs of the response set forth in Item 4 of the Statement are hereby amended by deleting the paragraphs in their entirety and replacing them with the following: On April 7, 2025, ArcelorMittal announced a new share buy-back program with share repurchases to be conducted in tranches that may be announced through May 2030 (the "Buy-Back Program"). On such date, ArcelorMittal also announced its intention to repurchase up to 10,000,000 shares under the first tranche of the program. The actual amount of the ArcelorMittal Shares to be repurchased in the various tranches pursuant to the Buy-Back Program will depend on the level of post-dividend free cash flow generated over the period. To date, none of the Reporting Persons have sold any ArcelorMittal Shares in the Buy-Back Program. On March 5, 2026, ArcelorMittal and Lumen entered into a Share Repurchase Agreement (as defined below) in connection with the Buy-Back Program. On each trading day during which ArcelorMittal conducts purchases under the Buy-Back Program, ArcelorMittal and Lumen have agreed to purchase and sell, respectively, a number of ArcelorMittal Shares, such that the number of ArcelorMittal Shares so purchased and sold represents 44.6% of the sum of: (i) the total number of shares purchased by ArcelorMittal under the Buy-Back Program (other than from Lumen) and (ii) the number of ArcelorMittal Shares purchased by ArcelorMittal from Lumen pursuant to the Share Repurchase Agreement, in each case on that trading day. The foregoing summary of Lumen's undertaking to participate in the Buy-Back Program should be read in conjunction with the full text of the Share Repurchase Agreement (as defined below), a copy of which is included as Exhibit 7 to this Nineteenth Amendment and which is incorporated herein by reference. The description of the Share Repurchase Agreement as set forth in Item 6 of this Nineteenth Amendment is incorporated by reference herein.

The first two disclosure paragraphs of the response set forth in Item 4 of the Statement are hereby amended by deleting the paragraphs in their entirety and replacing them with the following: On April 7, 2025, ArcelorMittal announced a new share buy-back program with share repurchases to be conducted in tranches that may be announced through May 2030 (the "Buy-Back Program"). On such date, ArcelorMittal also announced its intention to repurchase up to 10,000,000 shares under the first tranche of the program. The actual amount of the ArcelorMittal Shares to be repurchased in the various tranches pursuant to the Buy-Back Program will depend on the level of post-dividend free cash flow generated over the period. To date, none of the Reporting Persons have sold any ArcelorMittal Shares in the Buy-Back Program. On March 5, 2026, ArcelorMittal and Lumen entered into a Share Repurchase Agreement (as defined below) in connection with the Buy-Back Program. On each trading day during which ArcelorMittal conducts purchases under the Buy-Back Program, ArcelorMittal and Lumen have agreed to purchase and sell, respectively, a number of ArcelorMittal Shares, such that the number of ArcelorMittal Shares so purchased and sold represents 44.6% of the sum of: (i) the total number of shares purchased by ArcelorMittal under the Buy-Back Program (other than from Lumen) and (ii) the number of ArcelorMittal Shares purchased by ArcelorMittal from Lumen pursuant to the Share Repurchase Agreement, in each case on that trading day. The foregoing summary of Lumen's undertaking to participate in the Buy-Back Program should be read in conjunction with the full text of the Share Repurchase Agreement (as defined below), a copy of which is included as Exhibit 7 to this Nineteenth Amendment and which is incorporated herein by reference. The description of the Share Repurchase Agreement as set forth in Item 6 of this Nineteenth Amendment is incorporated by reference herein.

The first two disclosure paragraphs of the response set forth in Item 4 of the Statement are hereby amended by deleting the paragraphs in their entirety and replacing them with the following: On April 7, 2025, ArcelorMittal announced a new share buy-back program with share repurchases to be conducted in tranches that may be announced through May 2030 (the "Buy-Back Program"). On such date, ArcelorMittal also announced its intention to repurchase up to 10,000,000 shares under the first tranche of the program. The actual amount of the ArcelorMittal Shares to be repurchased in the various tranches pursuant to the Buy-Back Program will depend on the level of post-dividend free cash flow generated over the period. To date, none of the Reporting Persons have sold any ArcelorMittal Shares in the Buy-Back Program. On March 5, 2026, ArcelorMittal and Lumen entered into a Share Repurchase Agreement (as defined below) in connection with the Buy-Back Program. On each trading day during which ArcelorMittal conducts purchases under the Buy-Back Program, ArcelorMittal and Lumen have agreed to purchase and sell, respectively, a number of ArcelorMittal Shares, such that the number of ArcelorMittal Shares so purchased and sold represents 44.6% of the sum of: (i) the total number of shares purchased by ArcelorMittal under the Buy-Back Program (other than from Lumen) and (ii) the number of ArcelorMittal Shares purchased by ArcelorMittal from Lumen pursuant to the Share Repurchase Agreement, in each case on that trading day. The foregoing summary of Lumen's undertaking to participate in the Buy-Back Program should be read in conjunction with the full text of the Share Repurchase Agreement (as defined below), a copy of which is included as Exhibit 7 to this Nineteenth Amendment and which is incorporated herein by reference. The description of the Share Repurchase Agreement as set forth in Item 6 of this Nineteenth Amendment is incorporated by reference herein.

The first two disclosure paragraphs of the response set forth in Item 4 of the Statement are hereby amended by deleting the paragraphs in their entirety and replacing them with the following: On April 7, 2025, ArcelorMittal announced a new share buy-back program with share repurchases to be conducted in tranches that may be announced through May 2030 (the "Buy-Back Program"). On such date, ArcelorMittal also announced its intention to repurchase up to 10,000,000 shares under the first tranche of the program. The actual amount of the ArcelorMittal Shares to be repurchased in the various tranches pursuant to the Buy-Back Program will depend on the level of post-dividend free cash flow generated over the period. To date, none of the Reporting Persons have sold any ArcelorMittal Shares in the Buy-Back Program. On March 5, 2026, ArcelorMittal and Lumen entered into a Share Repurchase Agreement (as defined below) in connection with the Buy-Back Program. On each trading day during which ArcelorMittal conducts purchases under the Buy-Back Program, ArcelorMittal and Lumen have agreed to purchase and sell, respectively, a number of ArcelorMittal Shares, such that the number of ArcelorMittal Shares so purchased and sold represents 44.6% of the sum of: (i) the total number of shares purchased by ArcelorMittal under the Buy-Back Program (other than from Lumen) and (ii) the number of ArcelorMittal Shares purchased by ArcelorMittal from Lumen pursuant to the Share Repurchase Agreement, in each case on that trading day. The foregoing summary of Lumen's undertaking to participate in the Buy-Back Program should be read in conjunction with the full text of the Share Repurchase Agreement (as defined below), a copy of which is included as Exhibit 7 to this Nineteenth Amendment and which is incorporated herein by reference. The description of the Share Repurchase Agreement as set forth in Item 6 of this Nineteenth Amendment is incorporated by reference herein.