CalculatorsShare dilution
Share dilution calculator
What a share issue does to existing shareholders' ownership: the new shares' part of the enlarged company, and your stake before and after.
Optional; before the issue, and not buying any of the new shares
Your stake after the issue8.0000%Down from 10.0000%
- Shares after the issue
- 100,000,000
- New shares' share
- 20.0000%
- Existing holders' shareTogether, after the issue
- 80.0000%
- Your stake before
- 10.0000%
- Your stake after
- 8.0000%
Arithmetic on the figures entered. Not investment advice.
How it is calculated
shares after = shares now + new sharesnew shares' share = new shares ÷ shares afteryour stake = your shares ÷ shares in issue (before and after)This is ownership arithmetic only: it does not value the shares or say whether the price paid for the new ones was fair. A holder who takes up a rights issue in full keeps the same stake; one who does not is diluted as shown.
A bonus issue gives every holder new shares in proportion, so no one's stake changes even though the share count rises.