AMCOL INTL CORP

CUSIP: 02341W103 Class: COMMON STOCK

PRICE T ROWE ASSOCIATES INC /MD/'s Holding History (CIK: 0000080255)

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

Q1 2014
Shares 1,078,707 Value ($000) $49,383 Avg Close — Range —
Q4 2013
Shares 2,855,251 Value ($000) $97,021 Avg Close — Range —
Q3 2013
Shares 2,668,315 Value ($000) $87,201 Avg Close — Range —
Q2 2013
Shares 2,631,412 Value ($000) $83,389 Avg Close — Range —