CONSTELLIUM SE

At December 31, 2024, we are incorporated in France, with the principal U.S. executive office in Baltimore, Maryland and

operate 25 manufacturing facilities andthree R&D centers serving both global and regional customers. Among our production

sites, we have eight major facilities listed below catering to the needs of our A&T, P&ARP, and AS&I operating segments:

•The Muscle Shoals, Alabama facility is an integrated recycling, casting, rolling and finishing plant. Muscle Shoals is a

major supplier of can body stock, tab stock and end stock for the beverage can industry in North America, as well as

aluminum cold coils for ABS which are finished at our facility in Bowling Green, Kentucky. Muscle Shoals also

operates one of the largest and most efficient scrap recycling facilities in the world.

•The Bowling Green, Kentucky facility uses its fully integrated automotive finishing line to produce advanced products

for a variety of automotive applications, including inner closures, outer panels and structural components.

•The Neuf-Brisach, France facility is an integrated recycling, casting, rolling and finishing plant. Neuf-Brisach is a

major supplier of can body stock, tab stock and end stock for the beverage can and food can industries in Europe, as

well as ABS and heat exchanger materials for the automotive market. Neuf-Brisach also operates one of the largest and

most efficient scrap recycling facilities in Europe, benefitting from the start-up of a new recycling and casting center in

2024 which added 130 kt of recycling capacity.

•The Singen, Germany facility is an integrated casting, rolling, extrusions and finishing plant. The rolling operations

supply aluminum rolled products for packaging, specialty and automotive end-markets in Europe. The extrusion

operations have one of the largest extrusion presses in Europe and support the demand for automotive, rail and general

industrial applications.

•The Issoire, France facility is an integrated recycling, casting, rolling and finishing plant and is one of the world’s two

leading integrated aerospace plate mills based on volume. The plant operates two Airware® industrial casthouses and

leverages its recycling capabilities to take back scrap along the entire aerospace fabrication chain. Issoire also produces

highly technical and mission critical products for the space market. Issoire operates as an integrated platform with our

facilities in Ravenswood, West Virginia and in Sierre, Switzerland, which together, make Constellium a leader in the

supply of advanced materials to the global aerospace and space industries. Issoire also supplies aluminum sheet and

plate products for the commercial transportation, general industrial and defense markets in Europe.

•The Ravenswood, West Virginia facility is an integrated casting, rolling and finishing plant and supplies aluminum

plate and sheet products for the aerospace, space, commercial transportation, general industrial and defense markets in

North America. Ravenswood has world-class production capabilities needed for mission critical applications, and is

one of the few in the world capable of producing aluminum plates with the size and specs needed for the largest

commercial aircrafts and spacecrafts.

•The Sierre, Switzerland facility is an integrated casting, rolling, extrusions and finishing plant. Sierre is a major

supplier of precision plates for general engineering and defense industries, aerospace plates, and extruded products for

high-speed rail manufacturers. The Sierre facility also has casting operations that produce slabs for the aerospace,

automotive and general engineering markets and extrusion billets for the rail market.

•The Děčín, Czech Republic facility is an integrated recycling, casting and extrusion plant. Děčín is a leading supplier

of hard alloy extrusions for automotive and general industrial applications in Europe. Děčín is located near the German

border, strategically positioning it to supply the German, Czech and French automotive OEMs and Tier 1 suppliers.

Děčín’s large recycling and casting operations also allow it to offer a portfolio of high value-add customized hard

alloys to our customers.

Our manufacturing facilities as of December 31, 2024, are listed below by operating segment:

(1)Astrex Inc. is a Constellium joint venture with Can Art Aluminum Extrusions Inc.

(2)Constellium Engley (Changchun) Automotive Structures Co Ltd is a Constellium joint venture with Changchun Engley

Auto Parts Co. Ltd.

(3)Certain of the facilities representing a small portion of the square footage is leased.