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Sum-of-the-Parts Valuation

Value a company as the sum of its businesses. Enter each segment with a figure such as its EBITDA or revenue and a low and a high multiple, then the net debt, any other adjustments, the number of shares and, if you wish, the share price. The page multiplies out the value range of every segment, adds them to an enterprise value, walks the bridge from enterprise value to the value of the shares line by line, and divides by the shares for a low, mid and high value per share. It shows how much of the mid value each segment carries and the multiple of the whole company that the sum implies. When a price is typed, the gap between the price and the mid value is expressed as the implied conglomerate discount or premium in percent: arithmetic on your own multiples, with no judgement about the price. Advanced mode adds unallocated corporate costs, a holding-company discount, a different basis per segment and a sensitivity table. No market data is used: every value is typed in. A calculator for education and analysis, not investment advice.

  • Value range of every segment, the first written out as metric times multiple

  • Enterprise value and the bridge to equity: less net debt, plus or less each adjustment, divided by the shares

  • Value per share low, mid and high; each segment's share of the mid value with a bar chart; implied whole-company multiple

  • With a typed price: the implied conglomerate discount or premium in percent, as arithmetic

  • Advanced: corporate costs at a multiple, holding-company discount, P/E or direct value per segment, sensitivity to two multiples

Sum of the Parts


Unit System: /

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Segments (money in millions of one currency; a multiple is a number of times the metric)

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Debt


Other Adjustments (positive adds to the value of the shares, negative takes away)

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Shares



Advanced Options







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Sum-of-the-Parts Valuation

Sum-of-the-Parts Valuation: How It Works

What it does

Many companies are several businesses under one roof, and the businesses can differ in growth, risk and profitability. One multiple for the whole company hides those differences. A sum-of-the-parts valuation values each business (each segment) on its own, adds the values, takes off what is owed to others, and divides by the number of shares. The page does this at a low and at a high multiple for every segment, so that the answer is a range, and prints every step as formula, numbers put in, answer. When a share price is typed, it states the gap between the price and the middle of the range in percent. That gap is arithmetic on the multiples entered; the page makes no judgement about the price.

The method

Symbols. Money is in millions of one currency and shares are in millions, so a value per share is in the currency itself. For segment k, Mk is its metric, a yearly figure such as EBITDA (earnings before interest, taxes, depreciation and amortization) or revenue; xLk and xHk are the low and the high multiple, the number of times its metric the segment is taken to be worth.

Segment values. VLk = Mk xLk and VHk = Mk xHk. The mid value is their average, which is the metric times the middle multiple (xLk + xHk) / 2.

Enterprise value. EV = Σ Vk, in the low, mid and high case. Enterprise value is the value of the businesses to lenders and shareholders together.

Bridge to equity. Value of the shares Q = EV − ND + Anet. ND is the net debt (debt less cash; negative for net cash). Anet is the sum of the other adjustments, each with its sign: minority interests (the part of a subsidiary that belongs to other owners) and a pension deficit are subtracted; investments and stakes held at their value are added.

Value per share. v = Q / Nsh, with Nsh the number of shares.

Share of the mid value. Segment k carries VMk / Σ VMk of the total of the segment mid values.

Implied whole-company multiple. xW = EV / Σ Mk: the single multiple that would give the same enterprise value. It is the average of the segment multiples weighted by the metrics.

Price against the mid value. dc = (Pmkt − vM) / vM · 100, with Pmkt the typed price and vM the mid value per share. A negative result is called an implied conglomerate discount, a positive one an implied conglomerate premium.

Advanced. Unallocated corporate costs Cc a year are capitalised at a multiple xc and subtracted: EV = Σ Vk − Cc xc, and the implied multiple becomes EV / (Σ Mk − Cc). A holding-company discount dh in percent multiplies the value of the shares by (1 − dh / 100). A segment can be valued by a price-to-earnings multiple on its net income (usual for a financial arm, whose debt is part of its business) or by a value entered directly (a stake); both are values to shareholders, so they are left out of the enterprise value and added in the bridge, Q = EV − ND + O + Anet. The sensitivity table recomputes the mid value per share with the multiples of two chosen segments moved two steps down and two steps up.

What it assumes

  • Each segment could be valued as if it stood alone, at the multiple of comparable stand-alone companies.
  • The segment metrics add up to the company: costs, debt, tax and cash not assigned to a segment are captured by the net debt, the adjustments and (Advanced) the corporate costs, or not at all.
  • The multiples are yours. The page takes them as given and does not look anything up.
  • The mid case is the midpoint of each segment's multiples. It is a convention, not a most likely value.

When it misleads

  • The answer is the multiples. Nothing in the arithmetic tests them. A discount or premium to the sum can mean the price is off, or that the multiples are; the page cannot tell which.
  • Segment figures are the company's own cut. In U.S. filings they follow the way management runs the business. Shared costs may be allocated by a rule of the company's choosing, and the measure of segment profit is often not EBITDA, so segment metrics may not be comparable with those of stand-alone companies.
  • Costs of the centre. Leaving out head-office costs overstates the sum. Separating the businesses would also cost money and tax, which the sum ignores.
  • Double counting. A stake entered as a segment and again as an adjustment, or a financial arm's debt left in net debt while the arm is valued by P/E, is counted twice.
  • Mixed metrics. The implied whole-company multiple has no meaning when one segment's metric is EBITDA and another's is revenue.
  • Leverage. Debt and adjustments are fixed amounts, so a small change in multiples moves the value per share by a larger percentage, and with high debt the low case can be negative.

Worked example

The default case is illustrative, not a real company. Four segments with EBITDA of 800, 500, 300 and 150 million are valued at 9 to 11, 11 to 13, 7 to 9 and 14 to 18 times.

Low values: 800 · 9 = 7,200; 500 · 11 = 5,500; 300 · 7 = 2,100; 150 · 14 = 2,100; enterprise value 16,900. High values: 8,800 + 6,500 + 2,700 + 2,700 = 20,700. Mid: (16,900 + 20,700) / 2 = 18,800.

Implied whole-company multiple, mid: 18,800 / (800 + 500 + 300 + 150) = 18,800 / 1,750 = 10.743.

Bridge, mid: net debt 3,500; minority interests −400, pension deficit −300, investments +600, together −100. Value of the shares = 18,800 − 3,500 − 100 = 15,200. With 400 million shares, 15,200 / 400 = 38.00 per share. Low: (16,900 − 3,600) / 400 = 33.25. High: (20,700 − 3,600) / 400 = 42.75.

Shares of the mid value: 8,000 / 18,800 = 42.6 %, 6,000 / 18,800 = 31.9 %, and 2,400 / 18,800 = 12.8 % for each of the last two.

Typed price 32.00: (32.00 − 38.00) / 38.00 · 100 = −15.79, an implied conglomerate discount of 15.79 % on these multiples.

A calculator for education and analysis, not investment advice.




References

U.S. Securities and Exchange Commission (2026). Regulation S-K, Item 101: Description of Business. Code of Federal Regulations, Title 17, Section 229.101.

Apple Inc. (2023). Annual Report on Form 10-K for the Fiscal Year Ended September 30, 2023. Apple Inc., Cupertino.

Worked Examples

Published examples this tool reproduces; each page lists the inputs to enter and the printed answers.

All worked examples


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