Sum of the Parts Valuation
Sum of the parts values each business segment separately and adds them up. Learn the method, the conglomerate discount, a worked example and how it spots catalysts.
Some companies run several very different businesses: a technology company with a cloud division and an advertising division, or an industrial group with aerospace, healthcare and energy units. Valuing them with a single multiple can be misleading, because each segment deserves its own valuation. Sum of the parts (SOTP) analysis values each segment separately, adds them together and adjusts for debt and corporate costs. It often reveals a gap between the company's market value and the value of its pieces, known as the conglomerate discount.
The method#
- Identify the segments using the company's segment reporting.
- Value each segment with appropriate methods, usually multiples of comparable pure play companies, sometimes a DCF.
- Add other assets: cash, stakes in other companies, real estate.
- Subtract net debt, pension deficits and capitalised corporate costs.
- Divide by shares for value per share.
- Compare with the share price.
Worked example#
Why conglomerate discounts exist#
| Reason | Explanation |
|---|---|
| Complexity | Harder for investors to analyse |
| Capital allocation concerns | Cash from strong units may fund weak ones. See Capital Allocation and Management |
| Lack of focus | Management attention spread thin |
| Investor mismatch | Growth investors and value investors may each want only part of the business |
| Corporate costs | Overhead that pure plays do not carry |
| Tax and structure | Separating units may cost money |
Research has documented conglomerate discounts on average, though estimates vary and some diversified companies trade at premiums.
SOTP as a catalyst finder#
A large SOTP discount suggests value could be unlocked through:
- Spin offs: separating a division into its own listed company. See Spin-Offs.
- Asset sales to buyers who value the unit more highly. See Mergers and Acquisitions.
- Activist investors pushing for breakups.
- Better disclosure to help investors value segments.
General Electric's split into three companies (GE HealthCare in 2023, GE Vernova in 2024, with the remaining GE Aerospace) was widely discussed as an attempt to close a conglomerate discount.
Challenges#
- Segment data is limited: companies may not disclose full profit or cash flow by segment.
- Allocation of shared costs is subjective.
- Choosing peer multiples for each segment adds uncertainty.
- Dis synergies: separated units may lose shared resources or scale.
- Taxes and transaction costs reduce the value of breakups.
- The discount may persist without a catalyst.
Holding companies#
SOTP is common for holding companies with stakes in listed and private businesses. These often trade at persistent discounts to net asset value, reflecting fees, taxes, governance concerns and limited control over underlying assets.
Building the segment view#
Start with the segment note in the annual report, which shows revenue and operating profit for each reportable segment. Add capital spending and assets by segment where disclosed. Then look for listed pure play competitors for each unit and note their multiples. Where a segment has no clear peer, a simple DCF or a range of multiples gives a reasonable estimate. See Reading Financial Statements.
Frequently asked questions#
What is a sum of the parts valuation?#
A method that values each segment of a company separately and adds them together, adjusting for debt and corporate costs.
What is a conglomerate discount?#
When a diversified company trades below the combined value of its segments as if they were separate companies.
How can a conglomerate discount close?#
Through spin offs, asset sales, activist pressure or improved disclosure that helps investors value each business.
Next, learn to analyse profitability in Revenue Growth and Margin Analysis.
3 quick questions on this lesson. Get them all right to finish it.
Turn on JavaScript to take the quiz.