WALGREEN CO

CUSIP: 931422109 Class: COM

CHECK CAPITAL MANAGEMENT INC/CA's Holding History (CIK: 0001032814)

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

Q4 2012
Shares 12,530 Value ($000) $464 Avg Close — Range —
Q3 2012
Shares 214,894 Value ($000) $7,831 Avg Close — Range —