CMC REPORTS THIRD QUARTER OF FISCAL 2026 RESULTS

•Third quarter net earnings of $173.0 million, or $1.55 per diluted share and adjusted earnings of $193.0 million, or $1.73 per diluted share

•Consolidated core EBITDA increased 78.6% year-over-year to $353.6 million due to strong market conditions, increasing benefits from Transform, Advance, Grow ("TAG") initiatives, and the contribution of the recently acquired precast businesses

•Consolidated core EBITDA margin of 14.2% increased by 440 basis points compared to the prior year period

•Reduced net leverage; clear visibility to <2x well ahead of the stated goal of mid-2027

Irving, TX - June 25, 2026 - CMC (NYSE: CMC) (the "Company") today announced financial results for its fiscal third quarter ended May 31, 2026.

CEO Commentary

"During our fiscal third quarter, we continued to make great progress on our strategic agenda across a number of fronts," said Peter Matt, President and Chief Executive Officer. "We substantially grew Core EBITDA, and made meaningful progress deleveraging our balance sheet. Our early-stage construction portfolio is benefiting from solid demand, along with strong booking and backlogs at attractive prices. The commercial and operating rigor that define CMC, together with the growing benefits of our TAG program, position the Company to deliver strong results in the fourth quarter and beyond."

Third Quarter Operational and Financial Highlights

						Three Months Ended
(in thousands, except per share data)						5/31/2026						2/28/2026						5/31/2025						QoQ Change						YoY Change
Net sales						$	2,483,245					$	2,132,018					$	2,019,984					16.5		%				22.9		%
Net earnings						$	173,015					$	93,032					$	83,126					86.0		%				108.1		%
Core EBITDA						$	353,596					$	297,473					$	198,025					18.9		%				78.6		%
Core EBITDA margin						14.2%						14.0%						9.8%						20bps						440bps
Net earnings per diluted share						$	1.55					$	0.83					$	0.73					86.7		%				112.3		%
Adjusted earnings						$	193,025					$	130,147					$	79,618					48.3		%				142.4		%
Adjusted earnings per diluted share						$	1.73					$	1.16					$	0.70					49.1		%				147.1		%

For the third quarter of fiscal 2026, the Company reported consolidated net earnings of $173.0 million or $1.55 per diluted share, adjusted earnings were $193.0 million, or $1.73 per diluted share, an increase of 147.1% on a per-share basis versus the comparable prior year period. Consolidated core EBITDA for the fiscal third quarter increased 78.6% year-over-year to $353.6 million with all segments delivering significant adjusted EBITDA growth

relative to the prior year period. Consolidated core EBITDA margins expanded to 14.2%, up 440 basis points year-over-year due to metal margin expansion, a $52.9 million contribution from the recent precast acquisitions, as well as improved Europe Steel Group performance.

Relative to the fiscal second quarter, significant improvement from the Construction Solutions Group ("CSG") and Europe Steel Group, more than offset headwinds in the North America Steel Group adjusted EBITDA. Core EBITDA margins expanded 20 basis points sequentially.1

Business Segments - Fiscal Third Quarter 2026 Review

North America Steel Group

Third quarter North America Steel Group adjusted EBITDA was $253.5 million, an increase of 41% year-over-year driven by higher margins over scrap costs and benefits from CMC's TAG program. Metal margins increased $111 per ton, with average selling price for steel products increasing $130 per ton, while scrap costs were up only $19 per ton over the same timeframe. As a result, adjusted EBITDA margin was 14.2%, up from 11.5% in the prior year period. Finished goods shipment volumes for the North America Steel Group decreased 1.7% versus the prior year due to temporary inventory constraints related to the planned downtime, several lost shipping days due to heavy rainfall, which curtailed construction activity in certain markets, and increased commercial discipline in focusing on value over volume. Despite these headwinds in the third quarter, underlying demand remains solid. The project pipeline continues to grow, supported by public infrastructure spending, as well as mega-projects investments across data centers, semiconductors, and ongoing energy-related build outs, all of which are contributing to a healthy backlog. Downstream backlog volumes remained elevated above historical averages, with third quarter booking pricing increasing 15.5% versus the prior year period.

On a sequential basis, segment profitability moderated due to a combination of three factors. First, planned maintenance outages across a number of mill operations increased costs and impacted shipments. Second, construction activity in key markets, including Texas was curtailed by heavy rainfall. Finally, the timing of price increases temporarily lagged fuel-driven scrap cost increases. These factors impacting third quarter results have proven temporary. Margins on steel products compressed by $13 per ton sequentially, as the average selling price increase for steel products of $15 per ton was more than offset by a $28 per ton increase in scrap costs over the same time period.

Construction Solutions Group

CSG third quarter net sales doubled year-over-year to $394.6 million, while adjusted EBITDA of $97.4 million was up 138.1% year-over-year. Sales and adjusted EBITDA growth was fueled by the inclusion of CMC's precast acquisitions, which contributed $175.7 million to segment revenue and $52.9 million to segment adjusted

1 "Adjusted EBITDA," "core EBITDA," "core EBITDA margin," "adjusted earnings" and "adjusted earnings per diluted share" are non-GAAP financial measures. Details, including a reconciliation of each such non-GAAP financial measure to the most directly comparable measure prepared and presented in accordance with GAAP, can be found in the financial tables that follow.

EBITDA during the quarter, as well as a strong quarter for Tensar. Adjusted EBITDA margin of 24.7% was up 400 basis points relative to the prior year period.

Precast shipments experienced some weakness in select southeast markets in part driven by unfavorable weather conditions that led to delays. These conditions have started to normalize in the fiscal fourth quarter. Moreover, robust precast bidding activity, recent bookings, and strong backlogs supports solid performance in the fourth quarter. Tensar profitability accelerated year-over-year due to the strong demand environment and cost control actions. Performance for the other businesses within the CSG was stable relative to the year-ago period.

Europe Steel Group

For the third quarter, Europe Steel Group generated adjusted EBITDA of $34.7 million, up from $3.6 million in the prior-year period, benefiting from the receipt of a $20.4 million CO₂ credit and improved market conditions. Metal margin expanded by $37 per ton year-over-year as average selling price increased $34 per ton and scrap costs decreased by $3 per ton. Adjusted EBITDA margin expanded to 11.9%, up from 1.5% in the year-ago period.

More constructive trade policy is beginning to support market conditions in Europe. As expected, the EU Carbon Border Adjustment Mechanism ("CBAM"), implemented earlier this year, has strengthened domestic demand, with third quarter total steel shipments increasing 41.2% sequentially. Looking ahead, the combination of CBAM and improved EU trade measures effective July 1, 2026 and increased infrastructure spending in key markets is expected to support an improved operating and margin environment for the Europe Steel Group.

Balance Sheet & Capital Allocation

As of May 31, 2026, cash, cash equivalents and restricted cash totaled $563.2 million and available liquidity was nearly $1.8 billion. Net leverage adjusted for acquisitions2 ended the quarter at 2.1x reflecting strong cash generation and balance sheet discipline.

During the quarter, CMC repurchased 283,335 shares of common stock valued at $18.9 million in the aggregate. As of May 31, 2026, $128.9 million remained available under the current share repurchase authorization.

On June 24, 2026, the board of directors declared a quarterly dividend of $0.20 per share of CMC common stock payable to stockholders of record on July 6, 2026. The dividend, to be paid on July 15, 2026, will mark the 247th consecutive quarterly payment by the Company.

Outlook

Mr. Matt added, "Looking to the fourth quarter, supported by favorable market conditions, robust backlogs, and our strategic initiatives currently underway, we are well positioned to finish fiscal 2026 on very strong footing. We look forward to providing additional updates on our long-term strategy, operations, and financial performance at our upcoming Investor Day in August."

2 Net leverage adjusted for acquisitions represents net debt divided by trailing 12-month adjusted EBITDA. whereby trailing 12-month adjusted EBITDA has been further adjusted to (a) eliminate actual results from the precast business since the respective acquisition dates and instead include $245 million of expected annualized EBITDA contribution from the precast business, based on the midpoint of expectations and (b) eliminate the impact of approximately $36.5 million of acquisition and integration related costs. Net debt is a non-GAAP measure and is calculated as total debt minus cash, cash equivalents and restricted cash. A reconciliation to the most directly comparable measure prepared and presented in accordance with GAAP can be found in the financial tables that follow.

For the fourth quarter of fiscal 2026, core EBITDA is expected to increase sequentially driven primarily by the following factors:

•Healthy domestic demand conditions and strong backlogs

•Stronger North America Steel Group adjusted EBITDA, reflecting the absence of the $20 million third quarter mill outage headwind, along with a similarly sized benefit expected from the combination of volume growth and margin expansion

•Mid-teens adjusted EBITDA growth in the Construction Solutions Group driven by the contribution from the precast acquisitions and underlying momentum in the rest of the business

•Modestly higher adjusted EBITDA performance in the Europe Steel Group, excluding impacts from CO₂ credits

Investor Day

CMC previously announced it will host an Investor Day on August 5, 2026 to provide updates on its strategy, operations, and long-term growth outlook. The event will be webcast live via the Investor Relations section of CMC's website at www.cmc.com. Investors and other interested parties are invited to join the virtual event by registering in advance at the Investor Day section of ir.cmc.com. A replay of the webcast and accompanying materials will be available following the event.

Conference Call

CMC invites you to listen to a live broadcast of its third quarter fiscal 2026 conference call today, Thursday, June 25, 2026 at 11:00 a.m. ET. Peter Matt, President and Chief Executive Officer, and Paul Lawrence, Senior Vice President and Chief Financial Officer, will host the call. The call is accessible via our website at www.cmc.com. In the event you are unable to listen to the live broadcast, the call will be archived and available for replay on our website on the next business day. Financial and statistical information presented in the broadcast are located on CMC's website under "Investors."

About CMC

CMC is a Fortune 500 company headquartered in Irving, Texas, and a leading provider of early-stage construction solutions that support the foundational phases of modern infrastructure and building projects. Founded in 1915, CMC has grown from a single-site recycling operation to one of the largest U.S. manufacturers of steel reinforcing bar ("rebar"), a leading producer of subgrade soil stabilization and foundation enhancement solutions and a major supplier of concrete pipe and precast products.

Through an extensive manufacturing network primarily located in the United States and Central Europe, with strategic operations in the United Kingdom, Europe and Asia, CMC serves infrastructure, non-residential, residential, industrial and energy markets. While often unseen, CMC's products are essential to highways, bridges, airports, commercial buildings and other critical structures that support everyday life.