Steel Dynamics Inc. Announces CEO Succession; Wagler Named CEO

What Happened

• Steel Dynamics, Inc. (STLD) filed an 8-K reporting that on August 3, 2026 Chairman and CEO Mark D. Millett notified the Board he will retire as Chief Executive Officer effective January 1, 2027 and the Board has named him Executive Chairman concurrent with that retirement.
• The Board appointed Theresa E. Wagler (current EVP & CFO) to become President and Chief Executive Officer effective January 1, 2027, and appointed Richard A. Poinsatte (current EVP & Treasurer) to become Executive Vice President and Chief Financial Officer effective the same date. Ms. Wagler was appointed to the Board immediately (increasing the board from seven to eight members).
• The company also announced management reorganizations effective September 1, 2026: Barry Schneider to Executive VP & Chief Technology Officer; Miguel Alvarez to Executive VP & Chief Operating Officer, Aluminum Flat Rolled Products and Metals Recycling; James Anderson to Executive VP & Chief Operating Officer, Construction Products Operations; and Christopher Graham to Executive VP & Chief Operating Officer, Flat Rolled Steel Operations.
• The company furnished a press release dated August 4, 2026 (Exhibit 99.1) disclosing these changes.

Key Details

• Notice given: August 3, 2026; CEO retirement effective: January 1, 2027.
• Immediate board change: Theresa Wagler added to the Board and Board size increased from seven to eight.
• Leadership shifts effective Jan 1, 2027: Wagler → President & CEO; Poinsatte → EVP & CFO.
• Additional operational reorganizations effective September 1, 2026 for four senior executives; press release filed August 4, 2026 (Exhibit 99.1).

Why It Matters

• This is a planned, internal succession of top executives that maintains continuity at the company’s senior leadership level: the CEO role is being filled by the current CFO and other internal promotions restructure operating leadership.
• Investors get clarity on leadership and governance (new Executive Chairman role for Millett and an expanded board). Any material changes to compensation for Millett, Wagler, or Poinsatte will be determined by the Compensation Committee and disclosed if required.