ORION GROUP HOLDINGS INC

Ticker: ORN CUSIP: 68628V308 Class: Common Stock

Parallax Volatility Advisers, L.P.'s Holding History (CIK: 0001521001)

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

Q4 2017

Shares 4,074 Value ($000) $32 Avg Close $7.42 Range $6.10 - $8.37

Q2 2016

Shares 23,803 Value ($000) $126 Avg Close $5.23 Range $4.57 - $5.99

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2017	4,074	$32	$7.42	$6.10 - $8.37
Q2 2016	23,803	$126	$5.23	$4.57 - $5.99