May 12, 2006 — Nucor Corp.’s President and CEO, Daniel R. DiMicco (55), has assumed the additional role of Chairman.

Mr. DiMicco has been with Nucor for 23 years and has served as President, CEO and a member of the Board of Directors since September 2000. He has served as Vice Chairman since June 2001.

Nucor's Board of Directors has also designated Peter C. Browning (64), formerly non-executive chairman of the board, as its lead director. Mr. Browning has been a director since 1999 and non-executive chairman since September 2000.

At its meeting on Thursday, Nucor's Board of Directors also approved a 2-for-1 stock split that will be achieved by issuing one additional share of common stock for each share held by stockholders of record on May 19, 2006. The additional shares will be distributed on or about May 31, 2006. The stock split is intended to broaden interest in Nucor's common stock and improve its marketability. Nucor's Board believes the stock split is appropriate in view of the company's strong results and favorable long-term business outlook.

On the record date of the stock split, the Board of Directors' prior authorization to repurchase shares of Nucor's common stock will double to approximately 25.3 million shares.

Nucor and its affiliates manufacture steel products, with operating facilities in seventeen states. Products include carbon and alloy steel bars, beams, sheet and plate; steel joists and joist girders; steel deck; cold finished steel; steel fasteners; metal building systems; and light gauge steel framing. Nucor is the nation's largest recycler.