Exhibit 99.1

Press Release
July 6, 2021

7575 W. Jefferson Blvd.

Fort Wayne, IN 46804

Steel Dynamics Announces Additional Share Repurchase Authorization

FORT WAYNE, INDIANA, July 6, 2021 / PRNewswire / Steel Dynamics, Inc. (NASDAQ/GS: STLD) today announced that the company’s board of directors authorized an additional share repurchase program of up to $1.0 billion of the company’s common stock. The authorization is effective immediately and is additive to the previous $500 million program, which had $51 million remaining authorized and available for repurchase at June 30, 2021. Since 2016, the company has repurchased $1.6 billion of its common stock, representing 19% of its outstanding shares, and has paid cash dividends of over $950 million through June 30, 2021.

“These actions reflect the Board’s and senior leadership’s continued confidence in our ability to consistently generate industry-leading strong free cash flow throughout all market environments,” stated Mark D. Millett, Chairman, President and Chief Executive Officer. “We are committed to delivering shareholder value creation through profitable growth. We believe the strength of our operating model, capital structure, and liquidity profile provide us the unique ability to strategically grow, while also returning value to our shareholders and remaining committed to maintaining our investment grade credit ratings.”

Under the company’s share repurchase program, purchases take place as and when determined by the company in open market or private transactions, including transactions that may be affected pursuant to Rule 10b5-1 of the Securities Exchange Act of 1934, as amended. Pursuant to this program, purchases of shares of the company’s common stock, are made based upon the market price of the company’s common stock, the nature of other investment and growth opportunities, expected free cash flow, and general economic conditions. The share repurchase program does not require the company to acquire any specific number of shares and may be modified, suspended, extended or terminated by the company at any time without prior notice.

About Steel Dynamics, Inc.

Steel Dynamics is one of the largest domestic steel producers and metals recyclers in the United States, based on estimated annual steelmaking and metals recycling capability, with facilities located throughout the United States, and in Mexico. Steel Dynamics produces steel products, including hot roll, cold roll, and coated sheet steel, structural steel beams and shapes, rail, engineered special-bar-quality steel, cold finished steel, merchant bar products, specialty steel sections and steel joists and deck. In addition, the company produces liquid pig iron and processes and sells ferrous and nonferrous scrap.

Forward-Looking Statements

This press release contains some predictive statements about future events, including statements related to conditions in domestic or global economies, conditions in steel and recycled metals market places, Steel Dynamics' revenues, costs of purchased materials, future profitability and earnings, and the operation of new, existing or planned facilities. These statements, which we generally precede or accompany by such typical conditional words as "anticipate", "intend", "believe", "estimate", "plan", "seek", "project", or "expect", or by the words "may", "will", or "should", are intended to be made as "forward-looking," subject to many risks and uncertainties, within the safe harbor protections of the Private Securities Litigation Reform Act of 1995. These statements speak only as of this date and are based upon information and assumptions, which we consider reasonable as of this date, concerning our businesses and the environments in which they operate. Such predictive statements are not a guarantee of future performance, and we undertake no duty to update or revise any such statements. Some factors that could cause such forward-looking statements to turn out differently than anticipated include: (1) domestic and global economic factors; (2) global steelmaking overcapacity and steel imports, together with increased scrap prices; (3) pandemics, epidemics, widespread illness or other health issues, such as the COVID-19 pandemic; (4) the cyclical nature of the steel industry and the industries we serve; (5) volatility and major fluctuations in prices and availability of scrap metal, scrap substitutes, and our potential inability to pass higher costs on to our customers; (6) cost and availability of electricity, natural gas, oil, or other resources are subject to volatile market conditions; (7) compliance with and changes in environmental and remediation requirements; (8) increased regulation associated with the environment, climate change, greenhouse gas emissions and sustainability; (9) significant price and other forms of competition from other steel producers, scrap processors and alternative materials; (10) availability of an adequate source of supply for our metals recycling operations; (11) cybersecurity threats and risks to the security of our sensitive data and information technology; (12) the implementation of our growth strategy; (13) litigation and legal compliance, (14) unexpected equipment downtime or shutdowns; (15) governmental agencies may refuse to grant or renew some of our licenses and permits; (16) our senior unsecured credit facility contains, and any future financing agreements may contain, restrictive covenants that may limit our flexibility; and (17) the impacts of impairment.

More specifically, refer to Steel Dynamics' more detailed explanation of these and other factors and risks that may cause such predictive statements to turn out differently, as set forth in our most recent Annual Report on Form 10-K under the headings Special Note Regarding Forward-Looking Statements and Risk Factors, in our quarterly reports on Form 10-Q, or in other reports which we file with the Securities and Exchange Commission. These are available publicly on the Securities and Exchange Commission website, www.sec.gov, and on the Steel Dynamics website, www.steeldynamics.com under “Investors — SEC Filings”.

Contact: Investor Relations — +1.260.969.3500