OM GROUP INC

CUSIP: 670872100 Class: COM

BRIDGEWAY CAPITAL MANAGEMENT, LLC's Holding History (CIK: 0001107261)

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

Q3 2015
Shares 108,300 Value ($000) $3,562 Avg Close — Range —
Q2 2015
Shares 177,300 Value ($000) $5,957 Avg Close — Range —
Q1 2015
Shares 177,300 Value ($000) $5,324 Avg Close — Range —
Q4 2014
Shares 177,300 Value ($000) $5,284 Avg Close — Range —
Q3 2014
Shares 177,300 Value ($000) $4,601 Avg Close — Range —
Q2 2014
Shares 152,300 Value ($000) $4,939 Avg Close — Range —
Q1 2014
Shares 152,300 Value ($000) $5,059 Avg Close — Range —
Q4 2013
Shares 152,300 Value ($000) $5,545 Avg Close — Range —
Q3 2013
Shares 129,700 Value ($000) $4,381 Avg Close — Range —
Q2 2013
Shares 105,700 Value ($000) $3,268 Avg Close — Range —