Arconic : 2022 Corporate Sustainability Report

Tableof Contents

ABOUT THIS REPORT

Arconic has developed this 2022 Sustainability Report in alignment with the Sustainability Accounting Standards Board (SASB) Metals & Mining Standard (2018) and with reference to Global Reporting Initiative (GRI) Standards and reporting guidelines from the Aluminium Stewardship Initiative (ASI) Standards. The accuracy and completeness of the information contained in this 2022 Sustainability report is verified by leaders of our business functions. This report discloses information and data for the fiscal year that ended on December 31, 2022, which aligns with our financial reporting period in the Form10-Kfiled with the U.S. Securities and Exchange Commission on February 21, 2023.

REPORTING SCOPE

The boundary of information presented within this report covers all three Arconic business segments - Rolled Products, Building and Construction Systems (BCS), and Extrusions - and all manufacturing facilities. Unless otherwise noted, the information in this report is reflective of all global operations where we have financial and/or operational control. In November 2022, Arconic completed the sale of our Russian operations, leading to a change in the reporting scope compared to our 2021 report and disclosures in previous years. For more information about the divestiture, please see our most recent Form 10-K.

RESTATEMENT OF INFORMATION

Due to the 2022 divestiture of our Russian operations, Arconic has recalculated 2021 metrics to exclude the data accordingly in an effort to capture an accurate baseline for our sustainability strategy and targets. The exclusion of the Russian data is reflected in a reduction of our 2021 footprint but may result in an increase in intensity figures for certain cases due to a loss of production volume compared to previously reported values. For more information, please refer to the footnotes and data appendices included throughout this report.

LEGAL

Materiality

Information defined as material and presented in this report is based on criteria developed by third-party disclosure frameworks. The concept of materiality may vary between these organizations and, more importantly, is different than the meaning from a financial perspective applied to the Company's filings with the U.S. Securities and Exchange Commission. Accordingly, such information may not be considered material for financial reporting purposes. See our "Materiality Assessment" section for a description of how materiality was determined for the purposes of the information presented in this report. Please see our Annual Report on Form 10-K for the year ending on December 31, 2022, filed with the U.S. Securities and Exchange Commission on February 21, 2023, and other reports filed with the U.S. Securities and Exchange Commission, which are available at www.arconic.com.

Forward-looking Statements

This report contains certain statements that relate to future events and expectations and, as such, constitute forward- looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include those containing such words as "anticipates," "believes," "could," "estimates," "expects," "forecasts," "goal," "intends," "may," "outlook," "plans," "projects," "seeks," "sees," "should," "targets," "will," "would" or other words of similar meaning.

All statements that reflect Arconic's expectations, assumptions, or projections about the future, other than statements of historical fact, are forward-looking statements. Forward-looking statements in this document may include, but are not limited to, statements regarding Arconic's sustainability targets, goals, commitments, and initiatives as well as other operational strategies. Forward-looking statements by Arconic are not guarantees of future performance and are subject to known

and unknown risks, uncertainties, and changes in circumstances that are difficult to predict. Although Arconic believes that expectations reflected in any forward-looking statements are based on reasonable assumptions, it can give no assurance that these expectations will be attained, and it is possible that actual results may differ materially from those indicated by these forward-looking statements due to a variety of risks and uncertainties. For a discussion of some of the specific factors that may cause Arconic's actual results to differ materially from those projected in any forward-looking statements, see the risk factors described in Part I Item 1A of the Arconic Corporation Annual Report on Form 10-K for the fiscal year ended December 31, 2022, our Quarterly Reports on Form 10-Q, and our other reports filed with the Securities and Exchange Commission. Arconic disclaims any obligation to update publicly any forward-looking statements, whether in response to new information, future events or otherwise, except as required by applicable law.

All company names, trademarks, and product/service names herein are the property of their respective owners and used for identification purposes only. No endorsement is implied.

For more information regarding our Sustainability commitment, please visit www.arconic.com/esg; write to Corporate ESG at Arconic Corporation, 201 Isabella Street, Suite 400, Pittsburgh, PA 15212-5872; or e-mailsustainability@arconic.com.

© 2023 Arconic Corporation. All rights reserved.

Introduction

Arconic is committed to responsible corporate citizenship and maintaining strong values that minimize the Company's environmental footprint and support the well-being of our key stakeholders, including shareholders, employees, customers, suppliers, and communities in which we operate.

• CEO Statement
• About Arconic
• 2022 Sustainability Highlights
• Sustainability Strategy
• 2030 Sustainability Goals

2

HOME

CEO Statement

At Arconic, we are focused on real world sustainability. To us, it's not just about aspiration. It's about a genuine responsibility to get it right on environmental stewardship, energy conservation, protecting human rights, high safety standards, best-in-class corporate governance, and fostering a diverse, equitable, and inclusive culture. To make a real impact on sustainability, we took the time to understand where we are, where we want to be in the future, and what it would take to get there.

In 2022, we were able to utilize the insights we gained through our materiality assessment to determine a set of qualitative and quantitative 2030 sustainability targets for our four strategic pillars - Planet, Products, People and Process - which will direct our efforts in alignment with 7 interlinked United Nations Sustainable Development Goals (UN SDGs). These targets will shape our focus in delivering innovative solutions that will position Arconic as a powerful change agent for a sustainable future.

To ensure accountability and progress toward our sustainability targets, we established working groups that are tasked with administering effective and powerful programs in support of achieving our vision. These working groups, which are organized across Planet, Products, People and Process, focus on critical areas including decarbonization, commercial innovation, our people, supply chain sustainability, aluminum sourcing, and scrap utilization.

Throughout the year, we have been making steady progress in all of our targeted areas of sustainability. In the area of environmental stewardship, we worked to decrease emissions from purchased metal, which is the largest contributor to our Scope 3 emissions, by reducing primary metal volume and increasing scrap volume. The strategy resulted in a 13% reduction in the carbon intensity of purchased metal, which contributed to a 10% overall reduction in GHG emissions intensity compared to our 2021 baseline year. With regard to compliance, we had zero environmental spills or violations resulting in a significant fine.

Our products are a key enabler to our customers' sustainability efforts, and we seek to further accelerate product innovation through partnerships within our value chain and to increase product circularity by continuously improving our solutions and processes. In 2022, we invested $37 million in research and development, focused on our innovative products and technologies that enable customers in our end markets to provide consumers with greater fuel efficiency, higher safety ratings, and improved thermal properties in addition to an end-of-life recyclability that gives them a circularity few other materials can match. We continuously collaborate with our customers to incorporate our material and technologies into their end products for the purpose of achieving greater sustainability, in addition to a multitude of other consumer benefits.

11%

reduction in primary metal volume

13%

reduction in the carbon intensity of purchased metal

10%

reduction in overall GHG emissions intensity

$37M

invested in research and development