Enter your shares, the current price and the split ratio to see what you will own after the split. The value of your position stays the same, but the share count, price and cost basis per share all change.
| Before split | After split |
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Confirm the broker’s new share count and price.
Update cost basis per share correctly.
See how contracts and strikes typically adjust.
A split changes how many slices the company is cut into, not the size of the company. Your ownership percentage, the total value of your position and your total cost basis are all unchanged.
Forward splits are often used to make a high share price more accessible. Reverse splits are often used to lift a low price, for example to meet a stock exchange minimum price rule.
More shares at a lower price.
Fewer shares at a higher price.
Position value and total cost basis.
Multiply your shares by the split ratio. In a 3-for-2 split, 100 shares become 100 x 3 / 2 = 150 shares.
It is divided by the same ratio, so the total value stays the same. A $300 stock after a 3-for-1 split trades around $100.
A split that reduces the share count, such as 1-for-10: 1,000 shares become 100 shares and the price rises tenfold.
When a split would leave you with a fraction of a share, many brokers sell the fraction and pay you cash instead. That cash may be a small taxable sale.
Your total cost basis is unchanged; it is spread over the new number of shares. Basis per share = old basis per share / split ratio.
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