This document contains final regulations under sections 358, 1032, and 1502 of the Internal Revenue Code of 1986. The final regulations provide rules for adjusting the basis of a controlling corporation in the stock of a controlled corporation as the result of certain triangular reorganizations involving the stock of the controlling corporation. They also generally provide that the use of the controlling corporation's stock provided by the controlling corporation pursuant to the plan of reorganization is treated as a disposition of those shares by the controlling corporation.