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    Company Announcements

    August 4, 2026

    SDI taps Wagler as president and CEO, Millett to retire

    Written by David Schollaert

    Steel Dynamics Inc. (SDI) has promoted Theresa Wagler, presently EVP and CFO, to president and CEO, effective Jan. 1, 2027.

    The Fort Wayne, Ind.-based steelmaker said Mark Millett, co-founder and company CEO since 2012, will retire as CEO and transition to executive chairman of the board.

    David Schollaert

    David Schollaert is deputy editor-in-chief for Steel Market Update. David joined SMU after more than a decade in the metals and mining industry in a myriad of different roles. Much of his early experience and expertise were within the coverage and analysis of steel-making raw materials and served previously as senior editor of the CRU Prices Service. Most recently, however, before his return to market analysis, David held roles as a metals buyer and an operations manager for raw material suppliers. He can be contacted at david@steelmarketupdate.com or 724-720-1008.

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