X0303 4 2011-04-08 0000912145 AMERISTAR CASINOS INC ASCA 0001382069 NEILSEN ESTATE OF CRAIG H C/O AMERISTAR CASINOS INC. 3773 HOWARD HUGHES PKWY SUITE 490S LAS VEGAS NV 89169 1 Common Stock 2011-04-08 4 S 0 5000 18.60 D 31152092 D Common Stock 2011-04-08 4 S 0 5000 18.78 D 31147092 D Common Stock 2011-04-08 4 S 0 4700 18.91 D 31142392 D Common Stock 2011-04-08 4 S 0 300 18.92 D 31142092 D Common Stock 2011-04-08 4 S 0 5200 18.94 D 31136892 D Common Stock 2011-04-08 4 S 0 2717 18.95 D 31134175 D Common Stock 2011-04-08 4 S 0 1300 18.97 D 31132875 D Common Stock 2011-04-11 4 S 0 19100 18.85 D 31113775 D Common Stock 2011-04-11 4 S 0 10000 18.84 D 31103775 D Common Stock 2011-04-11 4 S 0 5000 18.83 D 31098775 D Common Stock 2011-04-11 4 S 0 200 18.821 D 31098575 D Common Stock 2011-04-11 4 S 0 200 18.82 D 31098375 D Common Stock 2011-04-11 4 S 0 1600 18.80 D 31096775 D Common Stock 2011-04-11 4 S 0 5000 18.90 D 31091775 D Sales made pursuant to a Rule 10b5-1 sales plan implemented by the reporting person. /s/ Gregory H .Cooper, Attorney-in-Fact 2011-04-11