Spin-Offs, Part 2: The First Two Years After Separation

Completion day is a starting gun, not a finish line. For two years after a spin-off, tax rules limit what either company can do, while activists, bidders and new reporting duties arrive on their own timetable.

Part 1 of this series, Spin-Offs, Part 1: What’s New in Corporate Separations, covered how a separation is structured and executed. This second part follows the two companies afterwards. It draws again on the Wachtell, Lipton, Rosen & Katz Spin-Off Guide, notably its annex on post-spin limits on strategic deals, and on what has happened to recent spin-offs since they closed.

The market’s first verdict is often wrong

A SpinCo’s opening price says more about who holds the shares than what the business is worth. Every parent shareholder receives SpinCo stock whether they want it or not. Many index funds, income funds and sector specialists sell, and that “flowback” weighs on the first weeks of trading.

The Swiss record shows how misleading day one can be:

• Sandoz opened at CHF 24 on 4 October 2023, valuing it at CHF 10.3 billion, below the USD 12.3 to 16.2 billion Jefferies had expected (Daily Sabah/Reuters). It then traded sideways around CHF 25 for months (CIC). Over the past year it has traded as high as CHF 72.70, about three times the opening price (AJ Bell).
• Amrize closed its first day in Zurich at CHF 39.31, against a reference price of CHF 46.08, while Holcim shares rose (Swissquote, Swissinfo/Bloomberg).

The parent is not safe either. Trivariate Research found that the highest-quality parents that spun off businesses were the weakest performers, lagging the market by 15 per cent on average in the first year (Transport Topics/Bloomberg).

Index rules shape the flowback. SIX adds a Swiss SpinCo to every index its parent belongs to until the next annual review. Amrize therefore joined the SMI and SLI on day one, temporarily making them 21 and 31 members (SIX). Wachtell lists index exclusion among the core risks of a spin-off, and a SpinCo that drops out at the next review faces a second wave of forced selling.

Two practical conclusions follow. Judge a spin-off over one to two years, not one month. And plan investor relations for the flowback: name the natural owners of the new stock before day one, and meet them. That is also why some parents prefer an IPO first, or a split-off, which places shares only with holders who chose them.

The two-year tax handcuffs

A US tax-free spin-off becomes taxable to the parent if it is part of a plan under which someone acquires 50 per cent or more of the parent or SpinCo. Any such acquisition within two years before or after the spin is presumed to be part of that plan. IRS regulations then offer safe harbours, which Wachtell’s guide summarises as follows:

“Substantial negotiations” generally means talks on significant economic terms such as price or exchange ratio. The device test matters for cash deals because a quick post-spin sale for cash looks like a way to pay out earnings at capital gains rates; the shorter the gap, the stronger that inference.

The contracts are tighter than the tax rules. A typical tax matters agreement bars SpinCo for two years from mergers, major asset sales, liquidation and certain buybacks unless the parent consents or an IRS ruling or tax opinion clears the step. SpinCo usually indemnifies the parent for any tax its actions trigger, even when the parent consented. Buybacks have their own limit: under IRS ruling guidelines, planned repurchases of 20 per cent or more of the stock can suggest a “device”.

Kenvue shows where the line sits. Johnson & Johnson completed its split-off of 80.1 per cent of Kenvue on 23 August 2023 (J&J 10-K). Kimberly-Clark signed its agreement to buy Kenvue on 2 November 2025, about 26 months later, with Kimberly-Clark holders set to own 54 per cent of the combined group (Kimberly-Clark annual report, The Middle Market). Inside the two-year window, a change of ownership on that scale would have started from a presumption that it was linked to the spin.

The post-spin calendar

* Only where SpinCo does not match one of the parent’s reporting segments. Reporting and listing dates run from Form 10 effectiveness or listing, shortly before the distribution. Source: Wachtell, Lipton, Rosen & Katz, Spin-Off Guide.

Most first-year milestones are reporting and listing chores. The strategic limit is the two-year window, which the tax matters agreement usually mirrors. The auditor’s attestation on internal controls normally follows with the second annual report.

SpinCos become targets when the handcuffs come off

A spin-off creates a smaller, focused company with a clean balance sheet, which is exactly what a strategic buyer likes. Wachtell lists increased exposure to unsolicited bids among the costs of separation. The tax rules shape the timing: inside two years, the safe route is a merger in which the SpinCo’s historic shareholders keep more than half of the combined company.

Kenvue’s path from listing to sale took two and a half years:

Two details deserve attention. The agreed price was slightly below the USD 22 IPO price, after a stretch in which Kenvue also faced political pressure over Tylenol (Dallas Innovates). Independence alone did not deliver the re-rating its sponsors hoped for. And the May 2024 debt-for-equity exchange used debt issued days before; the 2025 proposed tax rules discussed in Part 1 would have required banks to hold such debt for at least 30 days.

The defensive lesson goes back to the charter. The takeover protections chosen before the spin, and the rights plan kept ready on the shelf, determine how much time a SpinCo board has when a bid arrives.

Activists arrive early

A newly spun company is an attractive activist target. Its share price is often depressed by flowback, its register is changing hands, and its first standalone targets are untested. Activists can buy cheaply while long-term holders are still forming a view.

The gap between separation and campaign keeps shrinking:

Sources: Wachtell 2026 Spin-Off Guide; Reuters for Kenvue.

SpinCo boards have fewer structural defences than they once did, because proxy advisers penalise classified boards and similar protections adopted before listing (see Part 1). The protection is mostly preparation:

• Publish standalone targets you can beat. Missing the first year’s guidance is the most common opening for a campaign.
• Settle capital allocation early. Leverage, dividend and buyback policy should be explained before investors ask, within the tax limits above.
• Know the register. Track who is buying during the flowback and engage the long-term holders before an activist does.
• Mark the first annual meeting. Glass Lewis’s one-year grace period for newly public companies ends then, and ISS reviews any governance provisions it dislikes case by case each year.

Standing up a public company while still leaning on the old one

From the day its Form 10 becomes effective, SpinCo is a full SEC reporting company, often while its payroll, IT and accounting still run on the parent’s systems. The obligations arrive in a set order:

• First reports. The first 10-Q is due on the later of 45 days after effectiveness or the normal deadline. A 10-K is required for the year of effectiveness, even if SpinCo was still wholly owned when it fell due.
• Internal controls. Management’s report on internal control and the auditor’s attestation normally start with the second annual report. There is a catch: a SpinCo that inherits its parent’s reporting history to use Form S-3 early is treated as an accelerated filer, so both are required in its first 10-K.
• Board independence. NYSE and Nasdaq give a year from listing to reach a majority of independent directors. At the spin date, the audit committee needs three members, at least one of them independent.
• Smaller SpinCos. A SpinCo with less than USD 1.235 billion in annual revenue can be an emerging growth company, with lighter disclosure and no auditor attestation on controls.

The harder job is leaving the parent’s infrastructure. Transition services agreements usually run 12 to 24 months, and Kenvue’s services from J&J were set to end within 24 months of its IPO. Manufacturing ties last longer: J&J and Kenvue’s supply agreements ran from three months to five years (J&J 10-Q). Sandoz’s prospectus described reliance on Novartis for development and manufacturing for a significant period, including supply of certain biosimilars for ten years (Benzinga).

Long arrangements like these must be priced at arm’s length to protect tax-free status, and they become real commercial negotiations once the two companies answer to different shareholders. Exit plans for each TSA service, with owners and dates, belong in the separation programme, not in year two.

The parent left behind needs its own plan

The parent gets less attention than the SpinCo, but it carries the separation bill and a reset equity story.

• Separation costs are large and outlast the deal. J&J reported Kenvue separation costs of USD 1.09 billion in 2022, USD 986 million in 2023 and USD 145 million in 2024 (J&J 10-K 2025). On top come stranded costs: head-office functions once shared with the SpinCo that must now be cut or absorbed.
• The share price drops mechanically. Holcim fell 42.1 per cent to CHF 54.98 on its first day ex-Amrize, as the value of the distributed shares came out of its price (Swissquote). That is arithmetic, not a loss, but retail holders and some systems read it as one. Honeywell used a reverse split to restore its share price (see Part 1).
• Dividend policy is a signal. Novartis said it would keep raising its annual dividend from CHF 3.20 without rebasing it after the Sandoz spin, telling investors the smaller group could carry the same payout (Benzinga).
• Ratings follow size. A smaller, less diversified parent may lose rating headroom. Holcim secured investment-grade ratings for Amrize before the spin (BBB+ from S&P, Baa1 from Moody’s) (Holcim), and the parent’s own ratings need the same attention.
• The handcuffs apply both ways. The two-year tax presumption covers acquisitions of the parent as well as the SpinCo, so a parent that becomes a target is constrained too.

The parent also needs a new reason to own it. Honeywell renamed itself Honeywell Technologies and now markets itself as a pure-play automation company; ABB recast itself around electrification and automation after the robotics sale. The story has to be ready on day one, because the SpinCo will be telling its own.

A Swiss scorecard: Sandoz and Amrize

Two of Switzerland’s biggest recent spin-offs show that the market rewards patience, and that index status follows performance with a lag.

Sandoz is the patient case. A weak debut and months of sideways trading gave way to a re-rating, and almost three years after listing it joined the SMI. Its separation from Novartis was never total: long supply ties continued, as described above.

Amrize is the early-years case. Its index position was protected by SIX’s rule of adding a SpinCo to all of its parent’s indices until the next review, and it then qualified on its own. Operating results are still settling, and the switch to quarterly dividends shows a company courting the US investor base its New York listing was meant to attract.

Frequently asked questions about the years after a spin-off

Why do spin-off shares often fall on the first day?

Every parent shareholder receives SpinCo stock, and many index funds, income funds and sector specialists sell it. This “flowback” weighs on the first weeks of trading, so the opening price says more about who holds the shares than what the business is worth.

Can a SpinCo be acquired soon after a spin-off?

Yes, but in the US an acquisition of 50 per cent or more of the parent or SpinCo within two years of the spin is presumed linked to it, which can make the spin taxable to the parent. Inside that window, the safe route is a merger in which the SpinCo’s historic shareholders keep more than half of the combined company.

How long do transition services agreements last?

Transition services agreements usually run 12 to 24 months. Manufacturing and supply ties can last much longer: J&J and Kenvue’s supply agreements ran from three months to five years.

What happens to the parent’s share price after a spin-off?

It drops mechanically on the ex-date as the value of the distributed shares leaves its price. Holcim fell 42.1 per cent on its first day ex-Amrize; that is arithmetic, not a loss.

Why this matters for clients working with Breslin

The two years after a separation bring bids, activist approaches and portfolio decisions for both companies. Breslin’s strategic transactions practice advises boards and shareholders on divestments and on responding to approaches, and our corporate finance team supports capital structure and investor work. Non-core venture and fund holdings left in either company after the spin can be placed through our secondaries advisers.

Sources: Wachtell, Lipton, Rosen & Katz, Spin-Off Guide, 2025 edition, including Annex B on post-spin limitations, and 2026 edition; Johnson & Johnson SEC filings (10-K 2023, 10-Q Q3 2023, annual report 2023, 8-K, 17 May 2024, 10-K 2025); Kimberly-Clark annual report 2025; Kimberly-Clark and Kenvue shareholder approval; The Middle Market; Lesprom; Dallas Innovates; Reuters; Transport Topics/Bloomberg; Daily Sabah/Reuters; CIC; AJ Bell; AWP; Benzinga (Sandoz prospectus, Novartis dividend); Holcim; SIX (Amrize index adjustments, September 2025 review); Swissquote (24 June 2025, 30 April 2026); Swissinfo/Bloomberg. This article is general information, not legal or tax advice. It is informational and does not constitute an offer, a solicitation, a recommendation or investment advice; it is not directed at retail or non-professional investors. Breslin may act for holders or prospective buyers of securities of companies mentioned.