OM GROUP INC

CUSIP: 670872100 Class: COM

TOCQUEVILLE ASSET MANAGEMENT L.P.'s Holding History (CIK: 0000883961)

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

Q1 2015
Shares 391,050 Value ($000) $11,743 Avg Close — Range —
Q4 2014
Shares 461,050 Value ($000) $13,739 Avg Close — Range —
Q3 2014
Shares 552,250 Value ($000) $14,331 Avg Close — Range —
Q2 2014
Shares 144,000 Value ($000) $4,670 Avg Close — Range —
Q2 2013
Shares 142,600 Value ($000) $4,409 Avg Close — Range —