ARNC.PR Arconic Inc.

In the third quarter of 2019, Arconic Inc. (“Arconic” or the “Company”) management made the decision to realign its operations by eliminating its Transportation and Construction Solutions (TCS) segment and transferring the Forged Wheels business to its Engineered Products and Forgings segment (formerly named the Engineered Products and Solutions segment) and the Building and Construction Systems business to its Global Rolled Products segment. The Latin American extrusions business, which was formerly part of the Company’s TCS segment until its sale in April of 2018, was moved to Corporate. The Company’s new reporting segments are consistent with how the CEO is assessing operating performance and allocating capital in conjunction with the planned separation of the Company, as previously announced. This realignment has no impact on the Company’s historical consolidated balance sheet, statement of consolidated operations, and statement of consolidated cash flows. Prior period segment information will be recast to conform to the new reporting structure. Differences between segment totals and consolidated Arconic are in Corporate.

The Company is furnishing this Form 8-K to provide investors with historical segment information that is consistent with its new reporting structure. The schedules in Exhibit 99.1 provide unaudited segment information and segment measures on the basis of the new reporting segments for the previously reported year ended December 31, 2018 and the three-month periods ended March 31, 2019 and June 30, 2019.  The recast financial information contained in Exhibit 99.1 does not represent a restatement or reissuance of previously issued financial statements.

Non-GAAP Financial Measures

Some of the information included in this report is derived from Arconic’s consolidated financial information but is not presented in Arconic’s financial statements prepared in accordance with accounting principles generally accepted in the United States of America (GAAP). Certain of these data are considered “non-GAAP financial measures” under SEC rules. These non-GAAP financial measures supplement our GAAP disclosures and should not be considered an alternative to the GAAP measure. Reconciliations to the most directly comparable GAAP financial measures and management’s rationale for the use of the non-GAAP financial measures can be found in Exhibit 99.1.

In accordance with General Instruction B.2 of Form 8-K, the information in this Current Report on Form 8-K, including Exhibit 99.1, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.