Rights Issue Dilution Calculator
Calculation Results
How to Use This Tool
Follow these simple steps to calculate your rights issue dilution:
- Enter the number of existing shares you hold in the company.
- Input the total number of company shares outstanding before the rights issue.
- Select the rights issue ratio from the dropdown, or choose "Custom Ratio" to enter your own.
- Add the discounted subscription price per new share and the current market price of the stock.
- Select whether you plan to exercise your rights to buy the new shares.
- Click "Calculate" to see your detailed dilution breakdown.
- Use the "Reset" button to clear all inputs and start over.
Formula and Logic
The calculator uses standard rights issue dilution formulas:
- Allotted New Shares = (Existing Shares Held / Ratio Denominator) × Ratio Numerator
- Total New Company Shares = (Total Pre-Rights Shares / Ratio Denominator) × Ratio Numerator
- Pre-Rights Ownership % = (Existing Shares / Total Pre-Rights Shares) × 100
- Post-Rights Ownership % = (Post-Rights Shares Held / Total Post-Rights Shares) × 100
- Dilution % = Pre-Rights Ownership % - Post-Rights Ownership % (0 if you exercise all rights)
If you exercise your rights, your shareholding increases proportionally to the new shares issued, so your ownership percentage stays the same. If you do not exercise, your ownership is diluted as the total share count increases while your holdings stay flat.
Practical Notes
- Rights issues are typically offered at a 10-30% discount to the current market price, so check your offer document for exact terms.
- Dilution only applies if you choose not to exercise your rights, or if you partially exercise them.
- Consider the subscription price against your personal budget: exercising rights requires upfront cash, which may not be feasible for all investors.
- Some rights issues allow you to sell your rights to other investors if you do not wish to exercise them, which can offset minor dilution.
- Always confirm total outstanding shares with the company's latest regulatory filings, as this number can change between earnings reports.
Why This Tool Is Useful
This calculator helps retail investors and financial planners make informed decisions about rights issue participation. It eliminates manual calculation errors and lets you model multiple scenarios quickly. You can compare the impact of exercising vs. not exercising, or test different rights issue ratios to understand potential portfolio changes. The detailed breakdown includes investment requirements and post-issue holding value, so you can align decisions with your financial goals.
Frequently Asked Questions
What is a rights issue?
A rights issue is a way for companies to raise capital by offering existing shareholders the right to buy additional shares at a discounted price, proportional to their current holdings. Shareholders can choose to exercise these rights, sell them, or let them expire.
Does exercising my rights always prevent dilution?
Yes, if you fully exercise all rights allotted to you, your ownership percentage in the company will remain unchanged. Partial exercise will result in minor dilution proportional to the unexercised portion.
How is the dilution percentage calculated?
Dilution percentage is the difference between your ownership percentage before the rights issue and after. If you do not exercise your rights, the total share count increases while your holdings stay the same, reducing your ownership stake.
Additional Guidance
Before making any investment decisions related to a rights issue, review the company's offer document carefully for fees, deadlines, and trading terms for rights. Consult a licensed financial advisor if you are unsure how the rights issue fits into your overall portfolio strategy. Keep in mind that this calculator provides estimates only, and actual market conditions may affect the final value of your holdings post-issue.