OM GROUP INC

CUSIP: 670872100 Class: COM

MASON STREET ADVISORS, LLC's Holding History (CIK: 0001167711)

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

Q3 2015
Shares 4,508 Value ($000) $148 Avg Close — Range —
Q2 2015
Shares 4,192 Value ($000) $141 Avg Close — Range —
Q1 2015
Shares 4,015 Value ($000) $121 Avg Close — Range —
Q4 2014
Shares 3,964 Value ($000) $118 Avg Close — Range —
Q3 2014
Shares 3,966 Value ($000) $103 Avg Close — Range —
Q2 2014
Shares 4,036 Value ($000) $131 Avg Close — Range —
Q1 2014
Shares 3,907 Value ($000) $130 Avg Close — Range —
Q4 2013
Shares 5,087 Value ($000) $185 Avg Close — Range —
Q3 2013
Shares 4,698 Value ($000) $159 Avg Close — Range —
Q2 2013
Shares 4,430 Value ($000) $137 Avg Close — Range —