CENX · Century Aluminum Co

CHICAGO, Aug. 06, 2026 (GLOBE NEWSWIRE) - Century Aluminum Company (NASDAQ: CENX) today announced its second quarter 2026 results. Second Quarter 2026 Financial Results $MM (except shipments and per share data) Q2 2026 Q1 2026 Aluminum shipments (tonnes) 130,632 122,865 Net sales $ 752.1 $ 649.2 Net income attributable to Century $ 249.3 $ 337.5 Diluted earnings per share attributable to Century $ 2.39 $ 3.23 Adjusted net income attributable to Century (1) $ 257.3 $ 170.7 Adjusted earnings per common share (1) $ 2.46 $ 1.63 Adjusted EBITDA attributable to Century (1) $ 326.9 $ 231.4 Notes: (1) Non-GAAP measure; see reconciliation of GAAP to non-GAAP financial measures. Business Highlights Completed restart of last 90 pots at Mt. Holly Returned Line 2 at Grundartangi to near full production New Jamalco power generation turbine (TG4) online in August Received 2025 45X refund totaling $94.3 million in July As of the end of July, Century cash exceeded total debt Net sales for

CHICAGO, July 27, 2026 (GLOBE NEWSWIRE) - United States Secretary of Commerce Howard Lutnick , Senior Counselor to President Trump Dr. Peter Navarro and South Carolina Attorney General Alan Wilson today joined CEO of Century Aluminum Company (NASDAQ: CENX), Jesse Gary and hundreds of workers to celebrate Century Aluminum’s historic increase in domestic production. This historic milestone will increase total U.S. domestic primary aluminum production by approximately 10%, along with the Century Aluminum Mt. Holly workforce growing to over 600. “We are grateful to President Trump and Secretary Lutnick for their strong leadership as we rebuild U.S. aluminum production, which is critical for U.S. national and economic security. This 10% increase in domestic aluminum production is just the beginning,” remarked Jesse Gary, CEO of Century Aluminum. “President Trump's Section 232 program with no exceptions and no exemptions shows what is possible when our leaders create the conditions

CHICAGO, July 27, 2026 (GLOBE NEWSWIRE) - Century Aluminum Company (NASDAQ: CENX) will report second quarter 2026 earnings on Thursday, August 6, 2026, after market close. The news release will be issued through GlobeNewswire. The company will hold a follow-up conference call on Thursday, August 6, 2026, at 5:00 p.m. Eastern time. The earnings call will be webcast live on the Century Aluminum Company website, located at www.centuryaluminum.com . Plan to begin the registration process at least 10 minutes before the live call is scheduled to begin. A replay of the webcast will be archived and available for replay approximately two hours following the live call. Contact: Investors: Chad Rigg, 312.696.3132, [email protected] Media: Tawn Earnest, 614.698.6351, [email protected] Source: Century Aluminum Company

CHARLESTON, S.C., July 27, 2026 (GLOBE NEWSWIRE) - United States Secretary of Commerce Howard Lutnick, Senior Counselor to President Trump Dr. Peter Navarro and South Carolina Attorney General Alan Wilson will join Century Aluminum CEO Jesse Gary to celebrate Century Aluminum's expansion of its Mt. Holly aluminum smelter. This historic milestone will increase total U.S. domestic primary aluminum production by approximately 10% and grow the Century Aluminum Mt. Holly workforce to over 600. As a result of President Trump’s Section 232 national security tariff on aluminum, Century Aluminum is ramping up domestic aluminum production. Secretary Lutnick, Senior Counselor Dr. Navarro, Attorney General Wilson and Century Aluminum CEO Jesse Gary will deliver remarks commemorating the historic 10% increase in U.S. aluminum production and will be available for media interviews after. The ribbon cutting portion of the event will also be live streamed through Aluminum Now’s YouTube channel. The

CHARLESTON, S.C., July 23, 2026 (GLOBE NEWSWIRE) - United States Secretary of Commerce Howard Lutnick, United States Senator Tim Scott and South Carolina Governor Henry McMaster will join Century Aluminum CEO Jesse Gary to celebrate Century Aluminum's expansion of its Mt. Holly aluminum smelter. This historic milestone will increase total U.S. domestic primary aluminum production by approximately 10% and grow the Century Aluminum Mt. Holly workforce to over 600. As a result of President Trump’s Section 232 national security tariff on aluminum, Century Aluminum is ramping up domestic aluminum production. Secretary Lutnick, Senator Scott, Governor McMaster and Century Aluminum CEO Jesse Gary will deliver remarks commemorating the historic 10% increase in U.S. aluminum production and will be available for media interviews. WHAT: Century Aluminum Ribbon Cutting Celebration WHEN: Monday, July 27, 2026 10:30 AM - 11:45 AM (media set up at 10:15 AM ET) WHO:

CHICAGO, July 20, 2026 (GLOBE NEWSWIRE) - Century Aluminum Company (NASDAQ: CENX) applauds President Donald Trump’s latest executive order to incentivize investments that make American manufacturing great again. Signed today, the executive order allows companies investing in new primary aluminum production in the United States to import a commensurate amount of primary aluminum at a reduced tariff rate. The new tariff rate for such companies will now be 25%, down from 50% for such imports. Century Aluminum and Emirates Global Aluminum (EGA) announced in February plans to jointly build a new aluminum smelter in Inola, Oklahoma. It will be the largest single investment ever in U.S. primary aluminum production with potential to more than double the nation’s current output. “President Trump is again prioritizing America first by making it easier to make investments like Oklahoma Primary Aluminum,” said CEO Jesse Gary. “We are grateful for the President’s steadfast support, which

CHICAGO, June 05, 2026 (GLOBE NEWSWIRE) - Century Aluminum Company (NASDAQ: CENX) today announced that Jesse Gary, Century’s President and Chief Executive Officer, will present and participate in a question-and-answer session at the Wells Fargo Industrials and Materials Conference, beginning at approximately 1:30 p.m. CDT on Tuesday, June 9, 2026. A real-time audio webcast of this session will be available on the “Investors” section of Century’s website www.centuryaluminum.com . About Century Aluminum Company With its corporate headquarters located in Chicago, IL, Century Aluminum owns and operates primary aluminum smelting facilities in the United States and Iceland and is the majority owner and managing partner of the Jamalco alumina refinery in Jamaica. Visit www.centuryaluminum.com for more information. Cautionary Statement Forward-looking statements in this press release and statements made by Century Aluminum Company management during the session, for example, may

CHICAGO, May 07, 2026 (GLOBE NEWSWIRE) - Century Aluminum Company (NASDAQ: CENX) today announced its first quarter 2026 results. First Quarter 2026 Financial Results $MM (except shipments and per share data) Q1 2026 Q4 2025 Aluminum shipments (tonnes) 122,865 140,257 Net sales $ 649.2 $ 633.7 Net income attributable to Century $ 337.5 $ 1.8 Diluted earnings per share attributable to Century $ 3.23 $ 0.02 Adjusted net income attributable to Century(1) $ 170.7 $ 128.2 Adjusted earnings per common share(1) $ 1.63 $ 1.25 Adjusted EBITDA attributable to Century(1) $ 231.4 $ 170.6 Notes: (1) Non-GAAP measure; see reconciliation of GAAP to non-GAAP financial measures. Business Highlights Net sales of $649.2 million increased sequentially Achieved adjusted EBITDA attributable to Century of

CHICAGO, April 29, 2026 (GLOBE NEWSWIRE) - Century Aluminum Company (NASDAQ: CENX) will report first quarter 2026 earnings on Thursday, May 7, 2026, after market close. The news release will be issued through GlobeNewswire. The company will hold a follow-up conference call on Thursday, May 7, 2026, at 5:00 p.m. Eastern time. The earnings call will be webcast live on the Century Aluminum Company website, located at www.centuryaluminum.com . Plan to begin the registration process at least 10 minutes before the live call is scheduled to begin. A replay of the webcast will be archived and available for replay approximately two hours following the live call. Contact: Investors: Chad Rigg, 312.696.3132, [email protected] Media: Tawn Earnest, 614.698.6351, [email protected] Source: Century Aluminum Company

CHICAGO, April 23, 2026 (GLOBE NEWSWIRE) - Century Aluminum Company (NASDAQ: CENX) restarted production this week in the second potline at its Norðurál smelter in Grundartangi, Iceland, several months earlier than planned. Employees energized the first pots in Grundartangi’s second potline and will continue restarting the remaining pots on an accelerated schedule to reach close to full production by the end of July. Potline two represents about two-thirds of the plant’s total capacity. The restart comes after specialists, collaborating with the designers and the manufacturer of the equipment, made repairs to the transformers following an unanticipated failure. Permanent replacement transformers have been ordered and will be installed upon expected delivery this fall. “We’re proud of our Grundartangi team, who worked tirelessly to resume production under difficult circumstances,” said Jesse Gary, President and CEO of Century Aluminum.

Expansion Project Adds 10% to Total U.S. Production CHICAGO, April 16, 2026 (GLOBE NEWSWIRE) - Century Aluminum Company (NASDAQ: CENX) announced today that production of the first hot metal has begun following the expansion project at its Mt. Holly, S.C. plant. This major expansion, which Century expects to reach full production by the end of June 2026, will increase total U.S. primary aluminum production by 10% and has already created over 125 good-paying jobs in South Carolina. The expansion project increases Century’s leading position as the largest producer of primary aluminum in the United States. In addition to the Mt. Holly expansion project, Century announced in January that it would join forces with Emirates Global Aluminum to build the first primary aluminum smelter in the U.S. in nearly 50 years. The new Oklahoma-based smelter will create another 750,000 tonnes of primary aluminum production, doubling current U.S. capacity. It is expected to be the largest single

CHICAGO, April 02, 2026 (GLOBE NEWSWIRE) - Century Aluminum Company (NASDAQ: CENX) is applauding President Donald Trump’s new executive order that will close valuation loopholes that importers have been using to avoid the President’s tariffs on steel and aluminum, leveling the playing field for American manufacturers. The Section 232 tariff on primary aluminum is unchanged and remains at 50 percent. Importers had been abusing valuation loopholes to reduce their liability under the President’s steel and aluminum tariffs. In some instances, importers declared only the value of raw steel and aluminum while excluding value added through processing, thereby lowering the tariff owed and disadvantaging domestic manufacturers. The order clarifies that importers must declare the full value of covered products, promoting consistent enforcement and fair competition across the aluminum supply chain. “Century Aluminum strongly supports President Trump’s executive

CHICAGO, March 23, 2026 (GLOBE NEWSWIRE) - Century Aluminum Company (NASDAQ: CENX) today announced that Levi Chaffin has been promoted to Senior Vice President of Operations, Americas. He will continue to lead Century’s operations in the United States and Jamaica. “Levi has been an instrumental part of Century’s success, setting the bar for operational excellence across our locations in the US and Jamaica,” said Jesse Gary, President and Chief Executive Officer of Century Aluminum. “Over the past several years, he has driven significant improvements in operational performance and capital discipline. Building on that momentum, Levi will now drive our operational priorities across the Americas with a focus on safe production, improved efficiency, and workforce development, while bringing valuable perspective to our corporate strategy as a new member of the senior leadership team.” Before taking the helm of operations for the Americas, Chaffin

U.S. Aluminum Company is new venture founded by Oklahoma City-based Plotkin Family, owners of leading aluminum fabrication company M-D Building Products INOLA, Okla., Feb. 24, 2026 (GLOBE NEWSWIRE) - Local firm U.S. Aluminum Company has signed an agreement with EGA and Century Aluminum, the companies behind the planned primary aluminum production plant in Inola, Oklahoma, to explore the development of an aluminum fabrication plant near the new smelter. Click here to download photos of leaders from the three companies commemorating the agreement. The project, named Oklahoma Primary Aluminum , is expected to double U.S. primary aluminum production and make Oklahoma a national center of aluminum-related manufacturing. U.S. Aluminum Company is the first downstream firm to sign an agreement with the project developers. U.S. Aluminum Company’s goal is to build a plant near the smelter to turn liquid aluminum into products for the electrical, defense, aerospace, automotive and

CHICAGO, Feb. 23, 2026 (GLOBE NEWSWIRE) - Century Aluminum Company (NASDAQ: CENX) today announced that Jesse Gary, Century’s President and Chief Executive Officer, will present and participate in a question-and-answer session at the BMO Global Metals, Mining, & Critical Minerals Conference, beginning at approximately 8:15 a.m. EST on Tuesday, February 24, 2026. A real-time audio webcast of this session will be available on the “Investors” section of Century’s website www.centuryaluminum.com . About Century Aluminum Company With its corporate headquarters located in Chicago, IL, Century Aluminum owns and operates primary aluminum smelting facilities in the United States and Iceland and is the majority owner and managing partner of the Jamalco alumina refinery in Jamaica. Visit www.centuryaluminum.com for more information. Cautionary Statement Forward-looking statements in this press release and statements made by Century