OM GROUP INC

CUSIP: 670872100 Class: COM

ALLIANCEBERNSTEIN L.P.'s Holding History (CIK: 0001109448)

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

Q3 2015
Shares 42,193 Value ($000) $1,388 Avg Close — Range —
Q2 2015
Shares 51,453 Value ($000) $1,729 Avg Close — Range —
Q1 2015
Shares 51,453 Value ($000) $1,545 Avg Close — Range —
Q4 2014
Shares 51,453 Value ($000) $1,533 Avg Close — Range —
Q3 2014
Shares 54,353 Value ($000) $1,410 Avg Close — Range —
Q2 2014
Shares 54,353 Value ($000) $1,763 Avg Close — Range —
Q1 2014
Shares 54,353 Value ($000) $1,806 Avg Close — Range —
Q4 2013
Shares 54,374 Value ($000) $1,980 Avg Close — Range —
Q3 2013
Shares 54,353 Value ($000) $1,836 Avg Close — Range —
Q2 2013
Shares 54,353 Value ($000) $1,681 Avg Close — Range —