STLD · 8-K · 20260804PR090129

Leadership Transition

STEEL DYNAMICS INC · 2026-08-04 · Importance 31 · Surprise 42

Steel Dynamics announced that Theresa E. Wagler will become President and CEO on January 1, 2027, when Mark D. Millett retires as CEO and becomes Executive Chairman. Richard A. Poinsatte will succeed Wagler as Executive Vice President and CFO on the same date. Additional senior leadership changes effective September 1, 2026 will consolidate oversight across aluminum, metals recycling, construction products, steel fabrication, and flat rolled steel operations to support long-term growth and succession planning.

Key facts

• The company’s board of directors unanimously approved that effective January 1, 2027, Theresa E. Wagler will become the company’s President and Chief Executive Officer. source
• Mark D. Millett will retire as CEO and transition to Executive Chairman of the board of directors effective January 1, 2027. source
• Kenneth Cornew is the company’s Lead Independent Director who commented on the board’s decision. source
• Mark Millett is a co-founder of Steel Dynamics who co-founded the company over 30 years ago according to the press release. source