AMCOL INTL CORP

CUSIP: 02341W103 Class: COMMON STOCK

PRINCIPAL FINANCIAL GROUP INC's Holding History (CIK: 0001126328)

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

Q1 2014
Shares 161,350 Value ($000) $7,386 Avg Close — Range —
Q4 2013
Shares 156,015 Value ($000) $5,301 Avg Close — Range —
Q3 2013
Shares 146,868 Value ($000) $4,799 Avg Close — Range —
Q2 2013
Shares 145,554 Value ($000) $4,613 Avg Close — Range —