When General Electric broke itself into three independent public companies between 2023 and 2024 — GE HealthCare, GE Vernova, and GE Aerospace — the combined market value of the pieces eventually eclipsed what the original conglomerate had been worth on its own. Not a dollar of corporate income tax was paid on those distributions. Shareholders received stock in the new entities and walked away with no capital gain to report. The mechanism that made all of this possible sits in a single, dense paragraph of the Internal Revenue Code: Section 355.
For a corporation worth tens of billions of dollars, the difference between a properly structured tax-free spinoff and a botched one is staggering. A taxable distribution forces the parent to recognize gain on the entire built-in appreciation of the spun-off subsidiary, while shareholders get hit with dividend income on the fair market value of what they received. We are talking about multi-billion-dollar tax bills that vanish — or appear — depending on whether a handful of statutory and judicial requirements are satisfied.
This guide walks through how Section 355 works, the four statutory tests, the three judicial doctrines courts and the IRS layer on top, the trap known as the anti-Morris Trust provision, and the practical pitfalls that have sunk otherwise sensible deals. Whether you are a founder considering carving out a side business, a CFO evaluating a strategic separation, or a finance professional who simply wants to understand why these transactions dominate M&A headlines, the rules below are the ones that matter.
What Section 355 Actually Does
Section 355 is the single provision in the Internal Revenue Code that permits a corporation to distribute the stock of a controlled subsidiary to its shareholders without recognizing any gain at the corporate level — and without forcing shareholders to treat the distribution as a taxable dividend. Outside of Section 355, a distribution of appreciated property by a C corporation is generally taxed twice: once when the corporation recognizes gain on the appreciation, and again when shareholders are taxed on the fair market value as a dividend or capital gain. Section 355 turns off both layers.
There are three basic forms the transaction can take, and the labels matter:
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Spinoff — The parent corporation distributes the stock of a controlled subsidiary pro rata to its existing shareholders. After the dust settles, shareholders own stock in both the parent and the newly independent subsidiary in proportion to their original holdings. This is the most common form and the structure used by GE, 3M (Solventum, April 2024), and Kellanova when it cut loose its North American cereal business.
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Split-off — The parent offers shareholders the chance to exchange some or all of their parent stock for stock in the subsidiary. Unlike a spinoff, participation is voluntary and the shareholder base of the parent shrinks as people opt in. Split-offs are useful when a controlling shareholder or activist investor wants to consolidate ownership of one side of the business.
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Split-up — The parent distributes the stock of two or more controlled subsidiaries and then liquidates. There is no surviving parent. This structure shows up when an investor group wants to dissolve a holding company while preserving the operating businesses underneath.
All three forms use the same Section 355 plumbing, and all three must clear the same gauntlet of requirements.
The Four Statutory Requirements
These are written into the Code itself. Miss any one of them and the transaction is taxable, full stop.
1. Control
The distributing corporation must own stock representing at least 80 percent of the total combined voting power and at least 80 percent of each class of nonvoting stock of the corporation being spun off, measured immediately before the distribution. This is the same 80 percent threshold that governs consolidated returns and parent-subsidiary affiliations elsewhere in the Code. The control requirement is rarely the dealbreaker because companies tend to structure their subsidiaries with wholly-owned ownership from inception. Where it bites is in carve-out IPO sequences: if a parent sells more than 20 percent of a subsidiary's stock in a preliminary IPO and then tries to spin off the remainder, the control test fails and the back-end distribution becomes taxable.
2. Active Trade or Business
Both the distributing corporation and the controlled corporation must be engaged in the active conduct of a trade or business immediately after the distribution. The business in question must have been conducted for at least five years prior to the distribution, and it cannot have been acquired in a taxable transaction during that five-year window. Holding companies, asset shells, and businesses that consist primarily of passive investments do not qualify. A subsidiary that owns nothing but a portfolio of marketable securities, real estate held for investment, or intellectual property licensed out to third parties will fail this test.
The active trade or business requirement is the test that traps the most well-intentioned planners. Companies often want to spin off a division that has been ramping up for two or three years, but the five-year clock is unforgiving. The IRS clarified its position on this requirement in proposed regulations released in January 2025, and the rules continue to evolve — the safe approach is to assume that any subsidiary you intend to spin off needs five years of demonstrable operating history before the distribution date.
3. Device Restriction
The transaction cannot be used principally as a device for the distribution of the earnings and profits of the distributing corporation, the controlled corporation, or both. In plain English: you cannot use a Section 355 spinoff as a sneaky way to deliver what would otherwise be a taxable dividend at favorable capital gains rates. The device test is a facts-and-circumstances inquiry, but several factors weigh against the taxpayer:
- A pro rata distribution to a small group of related shareholders
- A subsequent sale by shareholders of the stock they received
- A subsidiary holding mostly cash or liquid assets at the time of distribution
- A subsidiary with no continuing operating role for the parent's shareholders
A favorable factor is the existence of a substantial corporate-level business purpose for the separation. If the transaction makes obvious commercial sense — regulatory compliance, distinct customer focus, divergent capital structures — the device concern recedes.
4. Distribution of Control
The distributing corporation must distribute either (a) all of the stock and securities of the controlled corporation it holds, or (b) an amount of stock constituting control (the 80 percent threshold) and establish that the retention of any remaining stock was not motivated by tax avoidance. In practice, parents distribute 100 percent of the subsidiary stock to avoid arguments about retained-stake motives.
The Three Judicial Requirements
In addition to the four statutory tests, courts and the IRS have layered on three nonstatutory doctrines that the transaction must satisfy. These are derived from broader principles of corporate tax law and apply to virtually every reorganization in the Code.
Business Purpose
The transaction must be motivated by a real, non-tax corporate business purpose. Acceptable purposes include responding to regulatory pressure, resolving management disputes, separating businesses with conflicting strategic needs, enabling a more focused capital structure, attracting different investor bases, or facilitating a future stock-based acquisition. Unacceptable purposes include personal estate planning for shareholders, separating businesses simply to lower the combined effective tax rate, or generating cash distributions in a tax-favored form.
The Treasury's January 2025 proposed regulations tightened the screws here, requiring that the business purpose be substantial enough that it could not reasonably be achieved by a less restructuring-intensive alternative. The IRS will not issue a favorable private letter ruling unless the business purpose is articulated in concrete, non-tax terms.
Continuity of Interest
The shareholders of the distributing corporation must retain a meaningful equity interest in both the distributing and the controlled entities after the transaction. This is not a particularly hard test for an ordinary pro-rata spinoff because the same shareholders end up owning both companies. Continuity of interest becomes a real issue only when the spinoff is paired with a follow-on merger that washes out the original shareholder base — which is exactly the scenario that Section 355(e) was written to police (see below).
Continuity of Business Enterprise
The controlled corporation must continue the historic business of the parent or use a significant portion of its historic business assets in a related business. This requirement guards against transactions where the controlled corporation is spun off and then immediately repurposed or liquidated. The five-year active-business lookback usually satisfies continuity of business enterprise as a byproduct, so this requirement rarely emerges as an independent constraint in practice.
The Anti-Morris Trust Trap: Section 355(e)
The Morris Trust transaction takes its name from a 1966 case in which a corporation spun off an insurance subsidiary in anticipation of merging with a national bank. The merger required divestiture to comply with banking law, and the Tax Court allowed the spinoff to remain tax-free even though it was integrated with the subsequent merger. For three decades, the "Morris Trust" maneuver — spin off a piece, then merge the remaining parent with another company — became a popular way to combine two businesses while parking the unwanted division in a separate, also tax-free, entity.
Congress shut that down in 1997 with Section 355(e). Under the anti-Morris Trust rule, if one or more persons acquire 50 percent or more of the vote or value of either the distributing or the controlled corporation pursuant to a plan that includes the spinoff, the distributing corporation must recognize corporate-level gain on the distribution. The spinoff remains tax-free to shareholders, but the parent gets hit with the full built-in gain on the subsidiary stock — a potentially crushing result.
The plan presumption is harsh: any acquisition occurring within two years before or after the distribution is presumed to be part of an integrated plan. The taxpayer can rebut the presumption with facts, but the burden is on the corporation, and the IRS regulations under Section 355(e) have grown into one of the more intricate corners of the Code.
The takeaway: if a spinoff is followed by a third-party acquisition of more than half of either company within two years, expect Section 355(e) to apply unless you can demonstrate that the acquisition and the spinoff were independently motivated. Document everything. The reverse Morris Trust — where the spun-off subsidiary merges with another company and the original shareholders end up owning more than 50 percent of the combined entity — remains a viable workaround precisely because it preserves shareholder control.
Real-World Examples
General Electric's Three-Way Split (2022–2024)
GE announced in November 2021 that it would separate into three independent public companies focused on aviation, healthcare, and energy. The healthcare arm spun off as GE HealthCare Technologies in January 2023, followed by GE Vernova (energy) in April 2024, with the remaining aviation business continuing as GE Aerospace. Each transaction was structured as a tax-free Section 355 distribution. The strategic rationale — separating businesses with completely different capital requirements, regulatory regimes, and investor profiles — was a textbook business purpose, and the five-year active trade or business test was easily satisfied given GE's century-plus of operating history in each segment.
3M and Solventum (April 2024)
3M spun off its healthcare business as Solventum Corporation in April 2024, distributing one Solventum share for every four 3M shares held. The transaction allowed 3M to concentrate on its industrial portfolio while giving the healthcare business room to pursue acquisitions and capital strategies that would have been awkward under the parent's umbrella. Solventum took on a substantial debt load at separation — a common feature of modern spinoffs, where the parent uses the new subsidiary's borrowing capacity to extract cash before the distribution. This kind of "leveraged spinoff" must be carefully calibrated to avoid running afoul of the device restriction.
Kellanova and WK Kellogg (October 2023)
Kellogg Company completed a two-way split in October 2023, separating its North American cereal business (WK Kellogg) from its global snacks and international cereal business (renamed Kellanova). The structure recognized that the cereal business was a mature, cash-generative operation with limited growth, while the snacks business was being valued and managed on entirely different terms. Once again, a clear business purpose, a long operating history, and no follow-on acquisition meant the transaction sailed through Section 355.
The Most Common Ways Spinoffs Go Wrong
Even when the deal team understands the rules, things break. The recurring failure modes:
The acquired-too-recently trap. A subsidiary brought into the group through a taxable purchase within the last five years cannot be spun off tax-free. If the parent acquired the business in question through a tax-free reorganization, the five-year clock tacks on from the predecessor, but a cash acquisition resets it.
The post-distribution sale. Shareholders who immediately sell the spinoff stock they received are evidence of a device — a way to convert what would have been an ordinary dividend into a capital gain. A clean spinoff anticipates that some shareholders will sell, but a coordinated cash-out is fatal.
The integrated merger. A spinoff paired with a planned acquisition of more than 50 percent of either entity triggers Section 355(e) corporate-level gain. The two-year presumption is a brutal mechanism, and deal teams routinely structure around it by either keeping deals independent or using a reverse Morris Trust where target shareholders end up owning less than half.
The hot-dog stand subsidiary. A subsidiary that is technically active but generates only nominal revenue or employs only a handful of people may fail the substantiality test the IRS reads into the active trade or business requirement. Real operating heft is required.
The retained-stake problem. A parent that keeps more than 20 percent of the subsidiary's stock after the distribution risks failing the control distribution requirement. Even retention of a smaller stake invites IRS scrutiny over motive.
The cash-rich subsidiary. A subsidiary loaded with cash or liquid assets relative to the size of its operating business looks like a dividend dressed up in spinoff clothing. Distributing operationally weighty subsidiaries with normal working capital is the safe path.
Why Recordkeeping Matters More Than Ever
The January 2025 proposed reporting regulations and the updated private letter ruling procedures in Revenue Procedure 2024-24 raised the documentation bar significantly. Corporations contemplating Section 355 transactions now need to maintain detailed contemporaneous records of:
- The corporate business purpose, articulated in non-tax terms with supporting board materials and external advice
- The five-year operating history of each business, with financial statements segregated by business unit
- The mechanics of any pre-distribution internal restructuring, including legal entity changes
- The pricing and timing of any related-party transactions in the lead-up to the distribution
- Any communications or term sheets relating to a potential follow-on acquisition
Building this kind of audit-ready trail starts with rigorous bookkeeping at the business-unit level. The cleaner the underlying financial records of each business that will go its separate way, the easier it is to defend the active trade or business test, the device analysis, and the business purpose justification under IRS examination.
Keep Your Corporate Finances Audit-Ready from Day One
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