X0101 EFFECT 33 LIVE 2013-04-09 09:00:00

S-4

0001328581 BOISE CASCADE Co 333-187651 0001328589 BOISE CASCADE BUILDING MATERIALS DISTRIBUTION, L.L.C. 333-187651-05 0001329291 BOISE CASCADE WOOD PRODUCTS HOLDINGS CORP. 333-187651-04 0001328590 BOISE CASCADE WOOD PRODUCTS, L.L.C. 333-187651-03 0001329305 BC CHILE INVESTMENT CORP 333-187651-02 0001572686 STACK ROCK CAPITAL, L.L.C. 333-187651-01