Reverse Morris Trust: Definition, 50% Rule, and Tax Traps

A Reverse Morris Trust is a corporate transaction that lets a company spin off a division and immediately merge it with another company without triggering corporate-level capital gains tax. The whole structure rests on one ownership rule: after the merger closes, the shareholders of the company doing the spin-off must own more than 50 percent of the combined entity. Clear that bar and the deal stays outside Section 355(e) of the Internal Revenue Code, which would otherwise tax any spin-off tied to an acquisition.¹

The structure takes its name from a 1966 Fourth Circuit case, Commissioner v. Mary Archer W. Morris Trust, in which a state bank spun off its insurance department before merging with a national bank and won tax-free treatment. Congress narrowed the original Morris Trust technique in 1997 by adding Section 355(e), which taxes spin-offs where someone ends up with a 50-percent-or-greater interest in either the parent or the spun-off business. The “reverse” version flips the ownership so the target’s shareholders — not the acquirer’s — dominate the combined company, keeping the deal out of Section 355(e)’s reach.²

The Three Steps

Every Reverse Morris Trust follows the same sequence. The order is not cosmetic; rearranging or collapsing the steps can destroy the tax treatment.

Step one: prepare the subsidiary. The parent moves the assets and liabilities of the division it wants to divest into a subsidiary, either newly formed or already in place. The subsidiary has to be a real operating business, not a shell holding cash or investments.

Step two: distribute the subsidiary’s shares. The parent hands out the subsidiary’s stock to its own shareholders, typically pro rata. The subsidiary becomes an independent, publicly traded company, and the parent’s shareholders now hold stock in both. This distribution must qualify as tax-free under Section 355.¹

Step three: merge the subsidiary with the acquirer. Right after becoming independent, the subsidiary merges with the acquiring company or a merger subsidiary it controls. The former parent shareholders receive stock in the combined entity. This merger has to qualify as a tax-free reorganization under Section 368.³

The acquirer gets the business it wanted. The parent is rid of a division that no longer fits. No corporate-level tax comes due, provided the ownership math holds.

The 50 Percent Ownership Rule and Why Size Matters

Section 355(e) triggers corporate tax when a spin-off is part of a plan under which one or more persons acquire a 50-percent-or-greater interest — measured either by combined voting power or by total value of all classes of stock — in the parent or the spun-off entity.¹

The RMT sidesteps that by ensuring the acquirer’s existing shareholders end up as the minority in the merged company. If the former subsidiary shareholders (i.e., the original parent shareholders) collectively hold more than 50 percent by both vote and value after the merger, then no one has “acquired” the disqualifying interest. The acquirer accepts being the smaller ownership block in exchange for getting the business.

This creates a hard size constraint: an RMT only works when the division being spun off is smaller than the acquirer. Consider an $8 billion acquirer picking up a $3 billion division. Former parent shareholders end up owning roughly 73 percent of the $11 billion combined company — comfortably safe. Reverse the numbers with a $10 billion division and an $8 billion acquirer and the parent shareholders land at about 56 percent, which still works but leaves little cushion for share buybacks, secondary offerings, or other events that could shift ownership during the sensitive post-closing window. When the two sides are close in size, the structure gets fragile.

What the Spin-Off Itself Must Satisfy

The distribution in step two has to independently pass every requirement of Section 355. These are not paperwork items. Missing one makes the whole distribution taxable, no matter how carefully the ownership percentages were engineered.

Active Trade or Business

Both the parent and the subsidiary must be running an active business immediately after the distribution, and that business must have been actively conducted throughout the five years leading up to the distribution date. The business cannot have been acquired in a taxable transaction during that five-year window.¹ The rule prevents companies from buying an operation and quickly repackaging it as a tax-free spin-off.

Business Purpose

There has to be a legitimate non-tax reason for the separation. Resolving strategic conflicts between divisions, meeting a regulatory demand, or giving the divested business independent access to capital markets all qualify. Reducing federal income taxes, by itself, does not. Companies document the purpose heavily before closing; it becomes central to any later IRS review.

Device Test

The spin-off cannot function principally as a device for distributing corporate earnings to shareholders at capital gains rates instead of as ordinary dividends.¹ Large holdings of cash and investments on either side of the split feed the argument that the transaction is really about moving those assets to shareholders on preferable tax terms.⁴

Distribution of Control

The parent must distribute stock representing “control” of the subsidiary, which under Section 368(c) means at least 80 percent of the total combined voting power and at least 80 percent of the total number of shares of each other class.³ If the parent retains stock above that threshold, it must show the retention isn’t tax-motivated.

Continuity of Interest

Shareholders have to keep a continuing equity stake in both companies after the separation. If the deal is set up so shareholders can immediately cash out, the IRS can recharacterize it as a disguised sale rather than a reorganization.

What the Merger Must Satisfy

The merger in step three has to separately qualify as a tax-free reorganization under Section 368. In practice that means a statutory merger or consolidation in which the acquirer (or a merger subsidiary) continues the spun-off business and the merger consideration is predominantly equity rather than cash.³ A clean spin-off cannot rescue a defective merger, and a clean merger cannot rescue a defective spin-off. Both tests have to hold on their own.

The Four-Year Presumption Window

Section 355(e) reaches beyond the closing date. Any acquisition of a 50-percent-or-greater interest during a four-year window — the two years before the distribution through the two years after — is presumed to be part of a prohibited plan, and the taxpayer has to prove otherwise.¹

That has real consequences. If the parent gets acquired within two years after the spin-off, or if the combined entity undergoes a change-of-control transaction, the original spin-off can retroactively become taxable. Deal documents in an RMT usually include protective covenants restricting stock repurchases, secondary offerings, and other events that could shift ownership percentages during the window. Breaching those covenants can trigger indemnification obligations in the hundreds of millions of dollars.

Limits on Cash Consideration

Former subsidiary shareholders have to receive equity in the combined entity, not cash, aside from small amounts paid in lieu of fractional shares. A significant cash redemption of subsidiary shares in connection with the transaction can make the whole distribution taxable. Any non-stock consideration the shareholders do receive, known as “boot,” is taxable to that extent even when the rest of the deal qualifies. The all-stock requirement is one reason RMTs stay less common than conventional acquisitions: many potential acquirers cannot or will not fund a deal purely with equity.

What Happens If the Structure Fails

A failed RMT produces a tax bill that can swamp the strategic value of the deal. If the spin-off doesn’t qualify under Section 355, the parent recognizes corporate-level gain equal to the full appreciated value of the subsidiary it distributed, taxed at the corporate rate. Separately, the parent’s shareholders may owe tax on the distribution, treated as a taxable dividend to the extent of earnings and profits rather than a tax-free return of capital.

If the spin-off initially qualifies but Section 355(e) is later triggered — for instance, by an acquisition inside the four-year window — the parent owes the corporate-level tax while shareholders are usually unaffected. On large corporate transactions the numbers can easily reach into the billions, which is why RMTs take months of tax planning and heavy documentation of business purpose, ownership projections, and protective covenants.

Section 355(d): The Purchased Stock Trap

Section 355(d) is a separate hazard. It creates corporate-level gain if anyone holds “disqualified stock” — stock acquired by purchase within the five years before the distribution — that represents a 50-percent-or-greater interest in either the parent or the subsidiary.¹ “Purchase” is defined broadly and captures most open-market buying, tender offers, and negotiated blocks. If a single investor or an affiliated group has built a 50 percent position in the parent through market purchases over the last five years, the spin-off can be disqualified even though the merger itself is structured perfectly. Section 355(d) operates independently from Section 355(e), and both have to be cleared.

Real-World Examples

Reverse Morris Trusts show up most often in capital-intensive industries where large companies periodically shed divisions that would be more valuable inside a focused competitor. Lockheed Martin used an RMT to separate its Information Systems and Global Solutions business and merge it with Leidos Holdings. Hewlett Packard Enterprise spun off its enterprise services division and combined it with Computer Sciences Corporation to form DXC Technology. Citrix Systems spun off its GoTo collaboration business and merged it with LogMeIn.

The pattern is consistent across those deals. The spun-off division was materially smaller than the acquirer, so the ownership math worked. The parent had a documented strategic reason for the separation. Both sides could point to a five-year active business history. Each transaction took many months to close and generated extensive tax documentation, including formal representations about business purpose and ownership continuity. Getting any of it wrong would have turned hundreds of millions or billions of dollars of tax-free treatment into a taxable event.

1
Office of the Law Revision Counsel. 26 U.S. Code 355 – Distribution of Stock and Securities of a Controlled Corporation
2
Internal Revenue Service. Revenue Ruling 2003-79
3
Office of the Law Revision Counsel. 26 U.S. Code 368 – Definitions Relating to Corporate Reorganizations
4
Federal Register. Guidance Under Section 355 Concerning Device and Active Trade or Business