AMCOL INTL CORP

CUSIP: 02341W103 Class: COMMON STOCK

GW&K Investment Management, LLC's Holding History (CIK: 0001082917)

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

Q4 2013
Shares 12,755 Value ($000) $433 Avg Close — Range —
Q3 2013
Shares 10,510 Value ($000) $343 Avg Close — Range —
Q2 2013
Shares 9,305 Value ($000) $295 Avg Close — Range —