CDW CORPORATION

CUSIP: 12512N105 Class: COM

E. Ohman J:or Asset Management AB's Holding History (CIK: 0002009396)

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

Q3 2007
Shares 354 Value ($000) $31 Avg Close — Range —
Q2 2007
Shares 354 Value ($000) $30 Avg Close — Range —
Q1 2007
Shares 354 Value ($000) $22 Avg Close — Range —
Q4 2006
Shares 354 Value ($000) $25 Avg Close — Range —