IPO date
September 24, 1915
Total splits
8
Cumulative multiple
78.45
Split likelihood
Elevated
Stock splits history for IBM (IBM) from 1964 to 2021
Cumulative multiple is the running product of split factors from the oldest row through each date.
| Type | Ratio | Pre-split | Post-split | |||
|---|---|---|---|---|---|---|
| November 4, 2021 | Stock split | 523:500 | x1.046 | x78.45 | $127.02 | $123.05 |
| May 27, 1999 | Stock split | 2:1 | x2 | x75 | $236.04 | $116.59 |
| May 28, 1997 | Stock split | 2:1 | x2 | x37.5 | $179.08 | $90.42 |
| June 1, 1979 | Stock split | 4:1 | x4 | x18.75 | $303.76 | $76.32 |
| May 29, 1973 | Stock split | 5:4 | x1.25 | x4.6875 | $407.73 | $328.19 |
| April 23, 1968 | Stock split | 2:1 | x2 | x3.75 | $635.55 | $327.19 |
| May 18, 1966 | Stock split | 3:2 | x1.5 | x1.875 | $516.51 | $353.97 |
| May 18, 1964 | Stock split | 5:4 | x1.25 | x1.25 | $587.59 | $475.72 |
- November 4, 2021x78.45
- May 27, 1999x75
- May 28, 1997x37.5
- June 1, 1979x18.75
- May 29, 1973x4.6875
- April 23, 1968x3.75
- May 18, 1966x1.875
- May 18, 1964x1.25
Pre-split price is the final regular-session close on a trading day strictly before the split calendar date. Post-split price is the first session open on or after that date. Both values come from unadjusted end-of-day bars for the company's primary listing.
The Type column reflects the data feed's event category (for example stock split vs stock dividend). When the feed labels a generic split but the ratio is reverse (e.g. 1:10), we show reverse stock split. Optional editorial context for a row appears next to the split ratio as an info icon (hover or keyboard focus on desktop; tap on mobile). The same text is listed under Row notes when that block is expanded.
Wondering why some rows show ratios like 51:50 or 2000:1973? Read: stock split ratios explained → How the cumulative column is computed: cumulative split multiplier explained. For ratios driven by spin-offs, see spin-offs explained. Or read the methodology for how prices and cumulative multiples are computed.
Split likelihood score for IBM (IBM)
Computed through June 13, 2026.
| Factor | Detail | Contribution |
|---|---|---|
| Absolute price | Price $272.24 → 22% of the price band | +9 |
| Personal split threshold | Price is 125% of the company's typical pre-split price ($218.51) | +28 |
| Split track record | 8 prior splits on record | +20 |
| Proximity to 52-week high | Price is 82% of the 52-week high | +5 |
An educational, rule-based score — not a prediction of any split and not investment advice. Splits are at the sole discretion of a company's board. How it's calculated · Will a stock split?
Stock splits — Technology
Technology peers of International Business Machines Corporation (IBM), sorted by number of splits.
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