ATMI INC

CUSIP: 00207R101 Class: COM

ALLIANCEBERNSTEIN L.P.'s Holding History (CIK: 0001109448)

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

Q1 2014
Shares 48,003 Value ($000) $1,633 Avg Close — Range —
Q4 2013
Shares 47,980 Value ($000) $1,449 Avg Close — Range —
Q3 2013
Shares 58,880 Value ($000) $1,561 Avg Close — Range —
Q2 2013
Shares 58,735 Value ($000) $1,389 Avg Close — Range —