X0303 4/A 2010-04-01 2010-04-05 0 0000790730 AMERON INTERNATIONAL CORP AMN 0001200109 MARLEN JAMES S 245 SO. LOS ROBLES AVE. PASADENA CA 91101 1 1 0 0 Chairman, CEO & President Common Stock 2010-04-01 4 M 0 8000 A 8000 D Common Stock 2010-04-01 4 F 0 3735 63.31 D 4265 D Common Stock 2010-04-01 5 G 0 4265 0 D 0 D Common Stock 2010-04-01 5 G 0 4265 0 A 18309 I Marlen Family Trust These shares were inadvertently reported as having been acquired indirectly by Mr. Marlen and directly by the Marlen Family Trust. They were, in fact, acquired directly by Mr. Marlen and subsequently transferred to the Marlen Family Trust by gift. Each Performance Stock Unit represented a contingent right, which vested on April 1, 2010, to receive one share of the common stock of Ameron International Corporation (the "Company"). The actual number of shares received by the reporting person was determined on April 1, 2010 based on the closing price of the Company's common stock on March 31, 2010. 12,000 derivative securities previously issued to the reporting person did not vest because the performance conditions for vesting of that number of shares of the Company's common stock were not met. Such derivative securities were forfeited. /s/ Cynthia A. Iwasaki, Power of Attorney 2010-05-18