OLYMPIC STEEL INC

Ticker: ZEUS CUSIP: 68162K106 Class: Common Stock

ESSEX INVESTMENT MANAGEMENT CO LLC's Holding History (CIK: 0000201772)

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

Q4 2017

Shares 67,203 Value ($000) $1,444 Avg Close $20.39 Range $18.10 - $22.86

Q3 2017

Shares 67,755 Value ($000) $1,491 Avg Close $18.37 Range $16.58 - $22.44

Q2 2017

Shares 68,564 Value ($000) $1,336 Avg Close $18.32 Range $15.83 - $24.00

Q1 2017

Shares 24,127 Value ($000) $448 Avg Close $22.72 Range $18.05 - $27.93

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2017	67,203	$1,444	$20.39	$18.10 - $22.86
Q3 2017	67,755	$1,491	$18.37	$16.58 - $22.44
Q2 2017	68,564	$1,336	$18.32	$15.83 - $24.00
Q1 2017	24,127	$448	$22.72	$18.05 - $27.93