OM GROUP INC

CUSIP: 670872100 Class: COM

NORTHERN TRUST CORP's Holding History (CIK: 0000073124)

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

Q3 2015
Shares 972,964 Value ($000) $32,001 Avg Close — Range —
Q2 2015
Shares 952,477 Value ($000) $32,003 Avg Close — Range —
Q1 2015
Shares 1,006,819 Value ($000) $30,234 Avg Close — Range —
Q4 2014
Shares 991,715 Value ($000) $29,552 Avg Close — Range —
Q3 2014
Shares 996,898 Value ($000) $25,869 Avg Close — Range —
Q2 2014
Shares 956,437 Value ($000) $31,017 Avg Close — Range —
Q1 2014
Shares 1,012,860 Value ($000) $33,647 Avg Close — Range —
Q4 2013
Shares 1,008,396 Value ($000) $36,716 Avg Close — Range —
Q3 2013
Shares 975,592 Value ($000) $32,956 Avg Close — Range —
Q2 2013
Shares 977,375 Value ($000) $30,221 Avg Close — Range —