SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

AMERICAN CENTURY COMPANIES INC's Holding History (CIK: 0000748054)

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

Q1 2015
Shares 17,400 Value ($000) $2,406 Avg Close — Range —
Q4 2014
Shares 170,200 Value ($000) $23,363 Avg Close — Range —
Q3 2014
Shares 171,453 Value ($000) $23,319 Avg Close — Range —
Q2 2014
Shares 394,783 Value ($000) $40,063 Avg Close — Range —
Q1 2014
Shares 572,792 Value ($000) $53,487 Avg Close — Range —
Q4 2013
Shares 387,742 Value ($000) $36,452 Avg Close — Range —