STEEL DYNAMICS INC — Director's Dealing 2010

Nov 19, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: STEEL DYNAMICS INC (STLD)
CIK: 0001022671
Period of Report: 2010-11-19

Reporting Person: Heasley Gary E (Executive Vice President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-11-19	Common Stock	M	7688	$7.81	Acquired	69743	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-11-19	Employee Stock Option (right to buy)	$7.81	M	7688	Disposed	2010-11-21	Common Stock (7688)	Direct

Footnotes

F1: Acquisition of stock pursuant to exercise of employee stock option, exempt from Section 16(b) under Rule 16b-3(d) and Rule 16b-6.

F2: Reflects adjustment of aggregate share total carried over from Column 5 of Reporting Person's prior Form 4 Report, to correct for beneficial ownership of both vested and unvested shares.

F3: Disposition to issuer of option, exempt from Section 16(b) under Rule 16b-3(e).