STEEL DYNAMICS INC - Director's Dealing 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: STEEL DYNAMICS INC (STLD)
CIK: 0001022671
Period of Report: 2010-05-25

Reporting Person: EDGERLEY PAUL B (Director)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-25	Common Stock	P	8400	$13.88	Acquired	44236	Direct
2010-05-25	Common Stock	P	10700	$13.89	Acquired	54936	Direct
2010-05-25	Common Stock	P	9900	$13.90	Acquired	64836	Direct
2010-05-25	Common Stock	P	6800	$13.91	Acquired	71636	Direct
2010-05-25	Common Stock	P	4200	$13.92	Acquired	75836	Direct
2010-05-25	Common Stock	P	4100	$13.93	Acquired	79936	Direct
2010-05-25	Common Stock	P	5900	$13.94	Acquired	85836	Direct
2010-05-25	Common Stock	P	9600	$13.95	Acquired	95435	Direct
2010-05-25	Common Stock	P	1500	$13.96	Acquired	96936	Direct
2010-05-25	Common Stock	P	2900	$19.97	Acquired	99836	Direct
2010-05-25	Common Stock	P	1200	$13.98	Acquired	101036	Direct
2010-05-25	Common Stock	P	1400	$13.99	Acquired	102436	Direct
2010-05-25	Common Stock	P	7400	$14.00	Acquired	109836	Direct
2010-05-26	Common Stock	P	704	$13.88	Acquired	110540	Direct
2010-05-26	Common Stock	P	13100	$13.89	Acquired	123640	Direct
2010-05-26	Common Stock	P	6300	$13.90	Acquired	129940	Direct
2010-05-26	Common Stock	P	11700	$13.91	Acquired	141640	Direct
2010-05-26	Common Stock	P	28700	$13.92	Acquired	170340	Direct
2010-05-26	Common Stock	P	15316	$13.93	Acquired	185656	Direct
2010-05-26	Common Stock	P	16400	$13.94	Acquired	202056	Direct
2010-05-26	Common Stock	P	14400	$13.95	Acquired	216456	Direct
2010-05-26	Common Stock	P	11044	$13.96	Acquired	227500	Direct
2010-05-26	Common Stock	P	52236	$13.98	Acquired	279736	Direct
2010-05-26	Common Stock	P	15200	$13.99	Acquired	294936	Direct
2010-05-26	Common Stock	P	40900	$14.00	Acquired	335836	Direct