X0202 4 2006-02-06 0 0000074303 OLIN CORP OLN 0001220621 RUGGIERO ANTHONY W C/O OLIN CORPORATION 190 CARONDELET PLAZA SUITE 1530 CLAYTON MO 63105 1 0 0 0 Common Stock 2006-02-06 4 M 0 10000 15.85 A 23611 D Common Stock 2006-02-06 4 M 0 61000 16.10 A 84611 D Common Stock 2006-02-06 4 M 0 38667 15.35 A 123278 D Common Stock 2006-02-06 4 S 0 55800 20.60 D 67478 D Common Stock 2006-02-06 4 S 0 3600 20.61 D 63878 D Common Stock 2006-02-06 4 S 0 6367 20.62 D 57511 D Common Stock 2006-02-06 4 S 0 2300 20.63 D 55211 D Common Stock 2006-02-06 4 S 0 900 20.64 D 54311 D Common Stock 2006-02-06 4 S 0 9500 20.65 D 44811 D Common Stock 2006-02-06 4 S 0 3600 20.66 D 41211 D Common Stock 2006-02-06 4 S 0 5700 20.67 D 35511 D Common Stock 2006-02-06 4 S 0 5200 20.68 D 30311 D Common Stock 2006-02-06 4 S 0 4200 20.69 D 26111 D Common Stock 2006-02-06 4 S 0 1500 20.70 D 24611 D Common Stock 2006-02-06 4 S 0 1400 20.71 D 23211 D Common Stock 2006-02-06 4 S 0 2000 20.72 D 21211 D Common Stock 2006-02-06 4 S 0 100 20.73 D 21111 D Common Stock 2006-02-06 4 S 0 400 20.74 D 20711 D Common Stock 2006-02-06 4 S 0 1400 20.75 D 19311 D Common Stock 2006-02-06 4 S 0 1200 20.76 D 18111 D Common Stock 2006-02-06 4 S 0 1300 20.77 D 16811 D Common Stock 2006-02-06 4 S 0 400 20.78 D 16411 D Common Stock 2006-02-06 4 S 0 600 20.79 D 15811 D Common Stock 2006-02-06 4 S 0 2200 20.80 D 13611 D Employee Stock Option Right to Buy 15.85 2006-02-06 4 M 0 10000 0 D 2000-02-09 2009-02-08 Common Stock 10000 0 D Employee Stock Option Right to Buy 16.10 2006-02-06 4 M 0 61000 0 D 2003-02-14 2012-02-13 Common Stock 61000 0 D Employee Stock Option Right to Buy 15.35 2006-02-06 4 M 0 38667 0 D 2004-02-13 2013-02-12 Common Stock 38667 19333 D The remaining 19,333 stock options will become exercisable on 2/13/06 /s/B. M. Pantalone, Attorney-in-Fact 2006-02-08