HWM · Howmet Aerospace Inc.

The price reported in column 4 is a weighted average price. The shares are sold in multiple transactions at prices from $266.03 to $271.76. The reporting person undertakes to provide Howmet Aerospace Inc. ("Howmet"), any security holder of Howmet, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the range set forth in this footnote.

Reflects granted restricted share unit awards that are subject to vesting and tax withholding upon vesting.

The price reported in column 4 is a weighted average price. The shares are sold in multiple transactions at prices from $250.07 to $253.00. The reporting person undertakes to provide Howmet Aerospace Inc. ("Howmet"), any security holder of Howmet, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the range set forth in this footnote.

Reflects granted restricted share unit awards that are subject to vesting and tax withholding upon vesting.

Reflects earned restricted share unit awards that are subject to vesting and tax withholding upon vesting.

Reflects granted restricted share unit awards that are subject to vesting and tax withholding upon vesting.

Reflects granted restricted share unit awards that are subject to vesting and tax withholding upon vesting.

Reflects granted restricted share unit awards that are subject to vesting and tax withholding upon vesting.

Represents payment of tax liability by delivering or withholding shares incident to the vesting of a stock award issued in accordance with Rule 16b-3.

Represents payment of tax liability by delivering or withholding shares incident to the vesting of a stock award issued in accordance with Rule 16b-3.

Represents payment of tax liability by delivering or withholding shares incident to the vesting of a stock award issued in accordance with Rule 16b-3.

Represents payment of tax liability by delivering or withholding shares incident to the vesting of a stock award issued in accordance with Rule 16b-3.

Reflects earned restricted share unit awards that are subject to vesting and tax withholding upon vesting.

Reflects earned restricted share unit awards that are subject to vesting and tax withholding upon vesting.

Reflects earned restricted share unit awards that are subject to vesting and tax withholding upon vesting.

Represents payment of tax liability by delivering or withholding shares incident to the vesting of a stock award issued in accordance with Rule 16b-3.

Includes 32 shares acquired pursuant to dividend reinvestment since the date of the Reporting Person's last ownership report.

Each phantom stock unit is the economic equivalent of one share of Howmet Aerospace common stock.

Phantom stock units were acquired under the Howmet Aerospace Deferred Compensation Plan. The phantom stock units were transferred into an alternative investment account under the plan.

The price reported in column 4 is a weighted average price. The shares are sold in multiple transactions at prices ranging from $179.71 to $181.335. The reporting person undertakes to provide Howmet Aerospace Inc. ("Howmet"), any security holder of Howmet, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the range set forth in this footnote.

Reflects grant of restricted share units that vest on July 1, 2028, subject to Mr. Plant's continued employment through such date and subject to partial or full vesting on the vesting date upon the occurrence of certain events.

The price reported in column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $156.14 to $158.00. The reporting person undertakes to provide Howmet Aerospace Inc. ("Howmet"), any security holder of Howmet, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the range set forth in this footnote.

Shares held in a trust, of which the reporting person is the trustee, grantor and beneficiary.