Sec Form 4 Filing - Toman Diana @ Arconic Corp - 2021-05-21

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Toman Diana 2. Issuer Name and Ticker or Trading Symbol Arconic Corp [ ARNC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP & Chief Legal Officer (Last) (First) (Middle) 201 ISABELLA STREET, SUITE 400 3. Date of Earliest Transaction (MM/DD/YY) 05/21/2021 (Street) PITTSBURGH, PA15212-5872 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 05/21/2021 A 18,237 ( 1 ) A $ 23.99 81,828 D Common Stock 916 I By Company 401(k) Plan

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Toman Diana 201 ISABELLA STREET SUITE 400 PITTSBURGH, PA15212-5872 EVP & Chief Legal Officer Signatures Adam Wheeler, Assistant General Counsel and Assistant Corporate Secretary by Power of Attorney 05/24/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On May 20, 2021, the shareholders approved certain amendments to the Arconic Corporation 2020 Stock Incentive Plan, including an increase in shares reserved for grants under the Stock Incentive Plan. As part of its governance practices, the Compensation and Benefits Committee of the Board of Directors adopted its equity grant and vesting cadence for annual employee grants, with grants to occur on March 1st of every year or the first business day thereafter. In order to align the 2021 annual employee equity grants with its equity grant and vesting cadence, the Compensation and Benefits Committee at its February meeting authorized the grant of the annual employee equity awards on May 21, 2021, with the number of shares granted to be calculated based on the closing price of Arconic, Inc. common stock on March 1, 2021 and subject to shareholder approval of the Amendments. The vesting date for the 2021 annual employee grant is March 1, 2024.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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