0000080255-12-000413 SC 13G/A 1 20120213 20120213 AMERON INTERNATIONAL CORP 0000790730 3270 770100596 DE 1130 SC 13G/A 34 005-37553 12596044 245 S LOS ROBLES AVE PASADENA CA 91101 6266834000 245 S LOS ROBLES AVE PASADENA CA 91101 AMERON INC/DE 19920703 PRICE T ROWE ASSOCIATES INC /MD/ 0000080255 6200 520556948 MD 1231 SC 13G/A 100 EAST PRATT ST BALTIMORE MD 21202 (410)345-6603 P.O. BOX 89000 BALTIMORE MD 21289 SC 13G/A 1 amn13gadec11.htm AMN AS OF 12/31/2011