April 2, 2019 FORM OF 2019 Long Term Incentive Award Letter Dear First Name, I am pleased to inform you that you have received a Grant of Units in the amounts set forth below. These Units entitle you to receive Constellium Shares (or a cash equivalent, at Constellium’s discretion), subject to the terms and conditions set forth in this Award Letter, in the Constellium 2018 Long Term Incentive Award Agreement (the “Award Agreement”) and the 2013 Constellium Equity Incentive Plan (the “Plan”). Capitalized Terms used in this Award Letter, unless so defined herein, shall have the meanings found in the Award Agreement or Plan. Grant Date April 1, 2019 Award Value $X,XXX,XXX Total Units Granted TOTAL (= YYY,YYY + ZZZ,ZZZ) Restricted Stock Units (RSUs) YYY,YYY Performance Share Units (PSUs) - Base Amount ZZZ,ZZZ S&P MidCap 400 Materials Index; Indices/Comparator Group S&P SmallCap 600 Materials Index Initial price on the Grant Date CSTM share price: $8.68 (20-day average) Vesting Date April 1, 2022 Vesting Period / Performance Period From the Grant Date through the Vesting Date Please note that the vesting of the RSUs and PSUs and the delivery of Shares (or a cash equivalent in respect of such RSUs and PSUs) is subject to the satisfaction of the Continued Service Condition. The vesting of the PSUs is, in addition, subject to the satisfaction of the Performance Condition. The level of achievement of the Performance Condition shall be determined by comparing the Constellium TSR to the average of the TSRs of the two Indices (i.e., the Comparator Group) at the end of the relevant Performance Period as follows: Performance Condition Achievement Level Number of Shares underlying PSUs Constellium TSR is below the average of the two PSU Base Amount x 0% 25th percentile TSRs of the Comparator Group Constellium TSR is at the average of the two 25th PSU Base Amount x 25% percentile TSRs of the Comparator Group Constellium TSR is between the average of the PSU Base Amount x (linear interpolation between two 25th percentile TSRs & the average of the two 25% and 100%) median TSRs of the Comparator Group Constellium TSR is at the average of the two PSU Base Amount x 100% median TSRs of the Comparator Group Constellium TSR is between the average of the PSU Base Amount x (linear interpolation between two median TSRs & the average of the two 75th 100% and 200%) percentile TSRs of the Comparator Group Constellium TSR is at or above the average of the PSU Base Amount x 200% two 75th percentile TSRs of the Comparator Group 2019 LTIP Award Letter Last Name, First Name

Notwithstanding the foregoing, if the Constellium TSR is negative, the number of Shares (or a cash equivalent) eligible to be delivered in respect of the PSUs shall be capped at 100% of the Base Amount. You acknowledge that you have received a copy of, or have online access to, the Award Agreement and the Plan, and hereby accept the Units granted, subject to all the terms and provisions of this Award Letter, the Award Agreement and the Plan. The Board or the Committee shall determine whether an event has occurred resulting in the forfeiture of your Units and any Shares issuable thereunder and all such determinations shall be final and conclusive. You also acknowledge that this award and similar awards are made on a selective basis and are, therefore, to be kept confidential. Very truly yours Agreed and Accepted Ryan Jurkovic First Name Last Name Senior Vice President Chief Human Resources Officer Date (mm/dd/yyyy): 2019 LTIP Award Letter Last Name, First Name