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Secondary Share Sale Calculator

Separate shareholder liquidity from primary capital and remaining ownership.

6 min guideTransparent methodologyUSDGo to calculator ↓
01 / UNDERSTAND THE CONCEPT

Secondary proceeds go to the seller.

A secondary sale transfers existing shares. It can provide shareholder liquidity without adding capital to the company or diluting other holders. The seller’s retained stake falls because shares are sold, not because new shares are issued.

Secondary pricing can differ from the headline preferred financing price because rights, liquidity and transfer restrictions differ. This model applies one explicit discount to a reference equity value.

02 / THE MATHEMATICS

The formula, made clear.

Company stake sold = current stake × fraction of holding sold; gross proceeds = stake sold × reference equity value × (1−discount)
Holding sold
A proportion of your personal stake. Selling 25% of a 20% stake transfers 5% of the company.
Net proceeds
Gross proceeds less seller fees; before taxes.
03 / A WORKED EXAMPLE

Put the numbers in context.

Selling one quarter of a 20% stake transfers 5% of the company. At $20,000,000.00 reference value and 10% discount, gross proceeds are $900,000.00; 2% fees leave $882,000.00.

Illustrative scenario · USD
InputExample value
Your company ownership20%
Portion of your holding sold25%
Reference equity value$20,000,000.00
Secondary price discount10%
Seller transaction fees2%
Seller proceeds before tax$882,000.00
MODEL BOUNDARIES

What this calculation assumes

Existing shares sold at a uniform price, no primary issuance. No tax, preference waterfall, transfer-right enforcement or approval analysis. Fees apply to gross proceeds.

FROM UNDERSTANDING TO ACTION

What to consider next.

Evaluate retained exposure and review the actual rights and transfer terms of the shares being sold.

How we approach financial models →
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