0001195948-06-000003 4 1 20060209 20060213 20060213 BUSSE KEITH E 0001195948 4 34 000-21719 06603570 260-459-3553 6714 POINTE INVERNESS WAY SUITE 200 FORT WAYNE IN 46804 STEEL DYNAMICS INC 0001022671 3312 351929476 IN 1204 6714 POINTE INVERNESS WAY SUITE 200 FORT WAYNE IN 46804 2604593553 6714 POINTE INVERNESS WAY SUITE 200 FORT WAYNE IN 46804 4 1 edgar.xml PRIMARY DOCUMENT