Portfolio Rationalisation: A UK CEO Divestment Checklist for 2026

Portfolio rationalisation is back at the top of the UK CEO agenda in 2026 — the decision framework for what to keep, grow, or sell now decides who compounds capital and who dilutes it.

According to Deloitte’s 2026 Global Divestiture Survey, 71% of sellers now evaluate or actively pursue strategic alternatives to structure an upcoming separation, up sharply from prior years as capital markets stabilise after two years of elevated rates. For UK CEOs, that shift means divestment has moved from a reactive fix for underperformance to a deliberate, board-governed lever for reallocating capital toward the businesses that actually earn their cost of capital.

What Is Driving UK CEOs to Rationalise Portfolios in 2026?

Three forces are converging. First, the corporate debt refinancing wall — with roughly $620bn in leveraged debt maturing into higher rates by 2027 — is forcing CFOs and CEOs to prioritise which units deserve fresh capital. Second, activist investors are increasingly targeting UK-listed conglomerates over unfocused portfolios, pushing boards to justify every division’s place in the group. Third, five years of AI-driven cost transformation have exposed which business lines can scale profitably on new technology and which cannot, sharpening the case for exit.

Under the UK Corporate Governance Code, boards are expected to show clear stewardship of capital allocation, not simply approve management’s recommendation. That raises the bar for how CEOs bring a divestment case to the table.

• Executive Action: Commission an annual portfolio review independent of the annual budget cycle, so divestment candidates surface outside the pressure of in-year numbers.
• Map each business unit’s return on invested capital against its cost of capital before the board strategy day, not after.
• Brief the board on refinancing exposure alongside portfolio strategy — capital structure and capital allocation are one conversation now, not two.

Which Business Units Belong on the Divestment List?

A credible divestment shortlist rests on four tests: strategic fit with the group’s stated growth areas, capital intensity relative to return, management attention consumed relative to group profit contribution, and buyer appetite. Units that fail two or more tests are candidates regardless of current profitability — a profitable but non-core unit still dilutes strategic focus and management bandwidth.

CEOs who wait for a unit to become a visible problem before reviewing it typically sell at a discount, under pressure, with fewer bidders at the table. The stronger pattern is to run the same rigour on strong performers as on weak ones, since portfolio discipline is about focus, not triage.

• Executive Action: Score every business unit against strategic fit, capital intensity, management attention, and buyer appetite — annually, not only when performance dips.
• Test divestment candidates against the group’s published growth strategy so the rationale survives investor and analyst scrutiny.
• Commission early, informal buyer soundings before a unit is formally marked for sale, to avoid a forced discount later.

How Should CEOs Structure the Decision Process?

Deloitte’s data shows a maturing separation process: seller performance against timing and proceeds targets rose from roughly a third of deals meeting expectations in 2024 to nearly half by the end of 2025, driven largely by earlier, more disciplined preparation. The lesson for UK CEOs is that the decision process matters as much as the decision itself.

A workable structure separates three roles: a corporate development function that runs the ongoing portfolio scoring, a small cross-functional deal team activated once a unit is shortlisted, and the board, which approves the strategic rationale before bankers are engaged rather than after. This sequencing prevents a common failure mode — a deal team building momentum toward a sale the board later blocks or waters down.

• Executive Action: Separate ongoing portfolio scoring from deal execution so the board sees strategy first and deal mechanics second.
• Get board sign-off on the strategic rationale for a sale before external advisers are appointed.
• Use INFORMD’s capital approval assessment template to pressure-test the business case before it reaches the board pack.

What Do Boards Expect Before Signing Off on a Sale?

Boards increasingly want three things documented, not just discussed: the counterfactual cost of retaining the unit, the intended use of proceeds, and a stranded-cost plan for the remaining group. Retained-business dis-synergies — shared services, overhead, and IT that don’t shrink proportionally when a unit leaves — are one of the most common reasons a divestment underdelivers against its business case.

NEDs sitting on risk or audit committees should also expect a clear line back to the group’s technology strategy, since separating a business unit almost always means separating systems, data, and vendor contracts too — a step frequently underestimated in the initial timetable.

• Executive Action: Present the board with a stranded-cost plan for the remaining group alongside the sale case, not as a follow-up paper.
• Name the specific use of proceeds — debt paydown, reinvestment, buyback — before signing, since vague answers invite investor scepticism.
• Scope the technology and data separation timeline in month one, not after heads of terms are signed.

How Can CEOs Avoid Deal Abandonment?

Deal abandonment has fallen sharply but remains a real risk: Deloitte found 98% of respondents reported at least one abandoned deal in its 2024 survey, improving to roughly one-third by the end of 2025. Abandoned processes most often trace back to shifting internal strategy mid-process, unmet value expectations, or thin early buyer interest — all three are visible risks before a deal is launched, not surprises that emerge during it.

CEOs who test buyer appetite and internal strategic conviction before committing management time to a formal process see materially fewer abandoned deals — and preserve credibility with the board and the market for the next one.

• Executive Action: Pressure-test internal strategic conviction with the board before launch — a divided board is the single biggest predictor of abandonment.
• Set a walk-away valuation range before engaging bidders, and hold the board to it.
• Use INFORMD’s executive self-assessment tools to check the readiness of the deal team before a process is launched publicly.

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