Bpifrance Participations SC 13D/ACONSTELLIUM SE / Bpifrance Participations ownership change

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934
(Amendment No. 5 )*

Constellium SE

(Name of Issuer)

Ordinary Shares, nominal value €0.02 per share

(Title of Class of Securities)

F21107101

(CUSIP Number)

Sophie Paquin 

Bpifrance Participations S.A. 

6-8, boulevard Haussmann 

75009 Paris 

France 

+33 1 53 89 55 73

With copy to: 

John C. Partigan 

Lloyd H. Spencer 

Nixon Peabody LLP 

799 9^th Street NW, Suite 500 

Washington, DC 20001 

(202) 585-8000 

((Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)

June 5, 2024

(Date of Event Which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), Rule 13d-1(f) or 13d-1(g), check the following box ¨.

*The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

This Amendment No. 5 (this “Amendment”) is being filed by Bpifrance Participations S.A., a société anonyme incorporated under the laws of the Republic of France (“Bpifrance Participations”), EPIC Bpifrance, a French public institution of industrial and commercial nature (“EPIC”), Bpifrance S.A., a société anonyme incorporated under the laws of the Republic of France (“Bpifrance”), and Caisse des dépôts, a French special public entity (établissement spécial) (“CDC”) (collectively, the “Reporting Persons”) pursuant to Section 13(d)(3) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”).

This Amendment amends the Statement on Schedule 13D relating to Ordinary Shares of the Issuer filed with the Securities and Exchange Commission (the “SEC”) on June 10, 2013, as amended by Amendment No. 1 filed with the SEC on July 25, 2013, Amendment No. 2 filed with the SEC on September 7, 2017, Amendment No. 3 filed with the SEC on November 8, 2017, and Amendment No. 4 filed with the SEC on August 10, 2023 (as amended, the “Schedule 13D”). Capitalized terms used in this Amendment but not otherwise defined herein have the meanings given to them in the Schedule 13D.

Item 1 is hereby amended and restated as follows:

This Amendment relates to the ordinary shares, nominal value €0.02 per share (the “Ordinary Shares”), of Constellium SE (the “Issuer”). The principal executive offices of the Issuer are located at Washington Plaza, 40-44 rue Washington, 75008 Paris, France.

Item 2 is hereby amended and supplemented as follows:

As of the date hereof, Bpifrance Participations directly holds 12,593,903 Ordinary Shares. As of the date hereof, neither Bpifrance S.A., CDC nor EPIC holds any Ordinary Shares directly. Bpifrance S.A. may be deemed to be the beneficial owner of 12,593,903 Ordinary Shares, indirectly through its sole ownership of Bpifrance Participations. CDC and EPIC may be deemed to be the beneficial owners of 12,593,903 Ordinary Shares, indirectly through their joint ownership and control of Bpifrance S.A.

Attached as Appendices A, B, C and D to Item 2 is information concerning the executive officers and directors of Bpifrance Participations, Bpifrance S.A., CDC and EPIC respectively, required to be disclosed in response to Item 2 and General Instruction C to Schedule 13D.

None of the Reporting Persons, nor, to the best of their knowledge, any of the persons referred to in Appendices A, B, C and D to Item 2 has, during the last five years, been convicted in a criminal proceeding (excluding traffic violations and similar misdemeanors) or been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree, or final order enjoining future violations of, or prohibiting or mandating activities subject to, Federal or state securities laws or finding any violation with respect to such laws.

Item 4 is hereby amended and supplemented as follows:

On June 5, 2024, Bpifrance Participations sold 3,800,000 Ordinary Shares by block trades at $20.1309 per share.

All of the Ordinary Shares that are held of record by the Reporting Persons as reported herein were acquired for investment purposes. The Reporting Persons retain the right to change their investment intent, from time to time to acquire additional Ordinary Shares or other securities of the Issuer, or to sell or otherwise dispose of all or part of the Ordinary Shares or other securities of the Issuer, if any, beneficially owned by them, in any manner permitted by law. In addition, the Reporting Persons may continue to acquire additional Ordinary Shares of the Issuer on the open market, if conditions are favorable, but are under no obligation to do so. The Reporting Persons may engage from time to time in ordinary course transactions with financial institutions with respect to the securities described herein.

Except as set forth above, none of the Reporting Persons currently has any plans or proposals which would be related to or would result in any of the matters described in Items 4(a)-(j) of Schedule 13D. However, as part of the ongoing evaluation of investment and investment alternatives, the Reporting Persons may consider such matters and, subject to applicable law, may formulate a plan with respect to such matters, and, from time to time, may hold discussions with or make formal proposals to management or the board of directors of the Issuer or other third parties regarding such matters.

Item 5 is hereby amended and supplemented as follows:

As of the date hereof, Bpifrance Participations holds directly 12,593,903 Ordinary Shares, which represents approximately 8.6% of the Issuer’s Ordinary Shares. As of the date hereof, none of Bpifrance S.A., CDC or EPIC holds any Ordinary Shares directly. Bpifrance S.A. may be deemed to be the beneficial owner of 12,593,903 Ordinary Shares, indirectly through its sole ownership of Bpifrance Participations. CDC and EPIC may be deemed to be the beneficial owners of 12,593,903 Ordinary Shares, indirectly through their joint ownership and control of Bpifrance S.A.

(a) See also the information contained on the cover pages of this Amendment, which is incorporated herein by reference. The percentage of Ordinary Shares beneficially owned by each Reporting Person is based on 145,832,473 outstanding Ordinary Shares of the Issuer, as reported in the Issuer’s Form 6-K filed with the SEC on May 14, 2024.

(b) See the information contained on the cover pages of this Amendment, which is incorporated herein by reference.

(c) Other than as described in Item 4 above, there have been no reportable transactions with respect to the Ordinary Shares of the Issuer within the last 60 days by the Reporting Persons, or, to the best of their knowledge, any of the persons referred to in Appendices A, B, C and D to Item 2.

(d) Not applicable.

(e) Not applicable.

Exhibit 1: Power of Attorney — CDC (incorporated by reference to Exhibit 1 to Amendment No. 2 to the Schedule 13D filed by Bpifrance Participations on September 7, 2017).

Exhibit 2: Power of Attorney — Bpifrance S.A (incorporated by reference to Exhibit 2 to Amendment No. 2 to the Schedule 13D filed by Bpifrance Participations on September 7, 2017).

Exhibit 3: Power of Attorney — EPIC and Bpifrance Participations (incorporated by reference to Exhibit 3 to Amendment No. 1 to the Schedule 13G filed by Bpifrance Participations on February 14, 2017).

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

APPENDIX A

Name, business address, present principal occupation or employment and place of citizenship of the directors and executive officers of

BPIFRANCE PARTICIPATIONS S.A.

The name, business address and present principal occupation or employment of each of the directors and executive officers of Bpifrance Participations S.A. are set forth below. The business address of each director and executive officer is Bpifrance Participations S.A., 27-31, avenue du Général Leclerc, 94710 Maisons-Alfort Cedex, France. Unless otherwise indicated, each director and executive officer is a citizen of France.

BOARD OF DIRECTORS

EXECUTIVE OFFICERS

APPENDIX B

Name, business address, present principal occupation or employment and place of citizenship of the directors and executive officers of

BPIFRANCE S.A.

The name, business address and present principal occupation or employment of each of the directors and executive officers of Bpifrance S.A. (f/k/a BPI-Groupe (bpifrance)) are set forth below. The business address of each director and executive officer is Bpifrance S.A., 27-31, avenue du Général Leclerc, 94710 Maisons-Alfort Cedex, France. Unless otherwise indicated, each director and executive officer is a citizen of France.

DIRECTORS

APPENDIX C

Name, business address, present principal occupation or employment and place of citizenship of the directors and executive officers of

CAISSE DES DÉPÔTS

The name, business address and present principal occupation or employment of each of the members of the Management Committee of Caisse des Dépôts are set forth below. The business address of each director and executive officer is Caisse des Dépôts, c/o 56, rue de Lille, 75007 Paris, France. Unless otherwise indicated, each such person is a citizen of France.

MANAGEMENT COMMITTEE

APPENDIX D

Name, business address, present principal occupation or employment and place of citizenship of the directors and executive officers of

EPIC BPIFRANCE

The name, business address and present principal occupation or employment of each of the directors and executive officers of EPIC Bpifrance (f/k/a EPIC BPI-Groupe) are set forth below. The business address of each director and executive officer is EPIC Bpifrance, 27-31, avenue du Général Leclerc, 94710 Maisons-Alfort Cedex, France. Unless otherwise indicated, each director and executive officer is a citizen of France.

DIRECTORS