OM GROUP INC

CUSIP: 670872100 Class: COM

Aperio Group, LLC's Holding History (CIK: 0001364615)

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

Q3 2015
Shares 21,635 Value ($000) $712 Avg Close — Range —
Q2 2015
Shares 21,549 Value ($000) $724 Avg Close — Range —
Q1 2015
Shares 17,895 Value ($000) $537 Avg Close — Range —
Q4 2014
Shares 16,781 Value ($000) $500 Avg Close — Range —
Q3 2014
Shares 10,241 Value ($000) $266 Avg Close — Range —
Q2 2014
Shares 10,372 Value ($000) $336 Avg Close — Range —
Q1 2014
Shares 10,304 Value ($000) $342 Avg Close — Range —
Q4 2013
Shares 10,068 Value ($000) $367 Avg Close — Range —
Q3 2013
Shares 10,178 Value ($000) $344 Avg Close — Range —
Q2 2013
Shares 9,318 Value ($000) $288 Avg Close — Range —