Example. In 1985, corporation X, which operates a business and has cash and other liquid assets, purchases all of the stock of corporation Y, which is engaged in the active conduct of a trade or business. Later in the same year, X merges into Y in a "downstream" statutory merger. In 1986, Y transfers the business assets formerly owned by X to a new subsidiary, corporation Z, and then distributes the stock of Z to Y's shareholders. Section 355 does not apply to the distribution of the stock of Z because the trade or business of Y was indirectly acquired by X, a predecessor in interest of Y, during the five-year period preceding the distribution.
26 C.F.R. §1.355-3