STEEL DYNAMICS INC

Ticker: STLD CUSIP: 858119100 Class: COMMON STOCK

CenterStar Asset Management, LLC's Holding History (CIK: 0001722053)

Note: Option positions (PUT/CALL) are excluded.

Q1 2018

Shares 2,825 Value ($000) $121 Avg Close $39.00 Range $34.83 - $42.94

Q4 2017

Shares 1,314 Value ($000) $58 Avg Close $32.46 Range $28.33 - $37.17

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2018	2,825	$121	$39.00	$34.83 - $42.94
Q4 2017	1,314	$58	$32.46	$28.33 - $37.17