Exhibit 99.3
CONSTELLIUM N.V. TUPOLEVLAAN 41-61 1119 NW SCHIPHOL-RIJK THE NETHERLANDS VOTE Use the BY INTERNET Internet to - www. transmit proxyvote. your com voting instructions up until 15:00 CET (9:00 website AM and EDT) follow on June the instructions 26, 2019. Have to obtain your proxy your records card in and hand to when create you an access electronic the voting instruction form. Use VOTE any BY touch-tone PHONE -1-800-690-6903 telephone to transmit your voting instructions up until 15:00 CET (9:00 follow AM the EDT) instructions. on June 26, 2019. Have your proxy card in hand when you call and then VOTE BY MAIL c/o Complete, Broadridge, sign 51 and Mercedes date your Way, proxy Edgewood, card and NY return 11717 it to prior Vote to Processing, 15:00 CET (9:00 AM EDT) on June 26, 2019. ELECTRONIC If you would DELIVERY like to OF reduce FUTURE the PROXY costs MATERIALS incurred by our company in mailing via annuale-mail general or the meeting Internet. materials, To sign you up can for consent electronic to receiving delivery, all please future follow material the electronically instructions under proxy materials “Vote by electronically Internet” and, in when future prompted, years. indicate that you agree to receive or access SHAREHOLDER MEETING REGISTRATION To www. vote proxyvote. and/or com. attend the meeting, go to the “Register for Meeting” link at TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS: E81112-P26852 KEEP THIS PORTION FOR YOUR RECORDS THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED. DETACH AND RETURN THIS PORTION ONLY CONSTELLIUM N.V. The Board recommends you vote FOR the following proposals: For Against Abstain 1. Conversion of the Company into a European Company (Societas Europaea - SE) (Agenda Item 2) 2. Amendments to the Company’s Articles of Association (Agenda Item 3) 3. Remuneration of theNon-Executive Board Members (Agenda Item 6 (ii)) 4. Adoption of the Annual Accounts 2018 10d. (Agenda Item 7) 5. Release from liability of Executive Board Member of the Company 10e. (Agenda Item 9) 6. Release from liability ofNon-Executive Board Members of the Company 10f. (Agenda Item 10) 7. Authorization to the Board to allow the Company to repurchase its own shares 10g. (Agenda Item 11) 8. Authorization to the Board to issue shares and/or grant rights to subscribe 10h. for shares (Agenda Item 12) 9. Authorization to the Board to limit or excludepre-emptive rights upon 10i. the issue of shares and/or the granting of rights to subscribe for shares. (Agenda Item 13) 10.Re-appointment of allNon-Executive Board Members. (Agenda Item 14 (i) through 14 (x) 10a. Mr. Michiel Brandjes 10b. Ms. Martha Brooks 10c. Mr. Richard B. Evans For Against Abstain Ms. Stéphanie Frachet Mr. Philippe C.A. Guillemot Mr. Peter Hartman Mr. Guy Maugis Mr. John Ormerod Mr. Werner Paschke Ms. Lori Walker 10j. 11. Appointment of PricewaterhouseCoopers Accountants N.V. as Dutch independent auditor of the Company for 2019. (Agenda Item 15) Please holders sign must exactly sign. If as a your corporation name(s) or appear(s) partnership, hereon. please When sign signing in full corporate as attorney, or executor, partnership administrator, name by authorized or other officer. fiduciary, please give full title as such. Joint owners should each sign personally. All Signature [PLEASE SIGN WITHIN BOX] Date Signature (Joint Owners) Date
Important Notice Regarding the Availability of Materials for the Annual General Meeting: The Invitation and Agenda and the Explanatory Notes are available at www.proxyvote.com and www.constellium.com. E81113-P26852 CONSTELLIUM N.V. Annual General Meeting June 27, 2019 at 17:00 CET (11:00 AM EDT) This proxy is solicited by the Board The shareholder(s) hereby appoint(s) or P.H.N. Quist, civil law notary in Amsterdam, the Netherlands, and/or his proxy-holder and/or his legal substitute and/or each (prospective) civil law notary of Stibbe, or any of them, as proxies, each with the power to appoint his/her substitute, and hereby authorize(s) them to represent and to vote, as designated on the reverse side of this ballot, all of the Class A Ordinary Shares of CONSTELLIUM N.V. that the shareholder(s) is/are entitled to vote at the Annual General Meeting, to be held at 17:00 CET (11:00 AM EDT) on June 27, 2019 at the offices of Stibbe (Beethovenplein 10, 1077 WM Amsterdam, the Netherlands). This proxy, when properly executed, will be voted in the manner directed herein. If no such instruction is made, this proxy will be voted in accordance with the Board’s recommendations. Continued and to be signed on reverse side