Stock Splits and Reverse Splits: What Happens to Share Count, Price, and Value
October 29, 2026
A stock split changes the number of shares outstanding and the price per share without changing the company's total value or your ownership percentage. In a 2-for-1 split, each share becomes two, and the price is cut in half. If you own 100 shares at $80, worth $8,000, after the split you own 200 shares at $40, still worth $8,000. A reverse split does the opposite: in a 1-for-10 reverse split, every ten shares become one, and the price rises tenfold.
Companies split stocks to make shares more affordable, improve liquidity, or, for reverse splits, to lift the price to meet exchange listing requirements. A split is a cosmetic change; it is neither good nor bad news by itself, although markets sometimes react.
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The split ratio tells you how many new shares you receive for old ones. For a ratio of N-for-M, your new share count = old shares × N ÷ M and the new price = old price × M ÷ N. A 3-for-2 split turns 100 shares at $90 into 150 shares at $60: value stays $9,000. A 5-for-1 split turns 20 shares at $500 into 100 shares at $100. A 1-for-10 reverse split turns 1,000 shares at $0.80 into 100 shares at $8.00; the value of $800 is unchanged.
If a split leaves a fractional share, such as 1.5 shares, brokers typically pay cash in lieu or hold fractional shares, depending on the policy.
| Split | Before | After | Total value |
|---|---|---|---|
| 2-for-1 | 100 shares at $80 | 200 shares at $40 | $8,000 |
| 3-for-2 | 100 shares at $90 | 150 shares at $60 | $9,000 |
| 5-for-1 | 20 shares at $500 | 100 shares at $100 | $10,000 |
| 1-for-10 reverse | 1,000 shares at $0.80 | 100 shares at $8.00 | $800 |
Cost Basis and Taxes
A split is not a taxable event. Your total cost basis stays the same but is spread over more (or fewer) shares. If you bought 100 shares at $50 each, a total of $5,000, a 2-for-1 split gives you 200 shares with a basis of $25 each. Your holding period carries over. When you later sell, the gain is the sale price minus the adjusted per-share basis. Brokers usually adjust basis automatically, but check your records, especially for older holdings or shares transferred between brokers.
What Splits Do Not Change
They do not change the company's market capitalization (price × shares), its earnings, or your percentage ownership. Earnings per share and dividends per share are adjusted: a $2.00 annual dividend per share becomes $1.00 after a 2-for-1 split, and an earnings per share figure of $6 becomes $3. Options and index weights adjust as well. Historical price charts are typically adjusted for splits so that comparisons are consistent. Research on splits has found that stocks sometimes rise afterward, perhaps because management signals confidence, but there is no mathematical reason for it.
Reverse Splits: A Caution
Reverse splits are often used by struggling companies to avoid delisting when the price falls below an exchange minimum, such as $1. The reverse split raises the price without improving the business, and many stocks continue to fall afterward. Treat a reverse split as a warning flag and examine the company's fundamentals. Also note that reverse splits can cash out small holders: if you own 5 shares and the split is 1-for-10, you may receive cash for the fraction.
Frequently Asked Questions
What happens to my shares in a 2-for-1 split?
You receive twice as many shares and the price per share halves.
Is a stock split taxable?
No. Your total cost basis stays the same, spread over the new share count.
Does a split change the value of my investment?
No. The total value is unchanged immediately after the split.
Why do companies do reverse splits?
Often to raise the share price to meet exchange listing requirements.
What is a fractional share?
A portion of a share. Many brokers hold fractions or pay cash in lieu.