CERADYNE INC

CUSIP: 156710105 Class: COMMON STOCK

GLENMEDE TRUST CO NA's Holding History (CIK: 0000314949)

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

Q3 2008
Shares 7,069 Value ($000) $259 Avg Close — Range —
Q2 2008
Shares 7,069 Value ($000) $242 Avg Close — Range —
Q4 2007
Shares 8,290 Value ($000) $468 Avg Close — Range —
Q3 2007
Shares 4,845 Value ($000) $366 Avg Close — Range —
Q2 2007
Shares 4,845 Value ($000) $358 Avg Close — Range —
Q1 2007
Shares 4,845 Value ($000) $265 Avg Close — Range —
Q4 2006
Shares 8,290 Value ($000) $468 Avg Close — Range —