 Shares of Weyerhaeuser Co. WY, -1.34 tacked on 0.4 in premarket trading Wednesday, after the real estate investment trust focused on timberlands and the manufacture of forest products announced a one-time special dividend and a new 1 billion stock repurchase program. The interim supplemental dividend of 50 cents a share is payable to shareholders of record on Oct. 5 on Oct. 19. 