Most common split ratios, last three years
Answered against 22 years of US equities and 12 years of US options data and published with the query that produced it. This result is stored as of 2026-11-01, from Stock Split Calendar From a Free SQL API.
| label | splits |
|---|---|
| reverse 1-for-10 | 679 |
| reverse 1-for-1 | 288 |
| reverse 1-for-20 | 280 |
| reverse 1-for-5 | 237 |
| forward 2-for-1 | 221 |
| reverse 1-for-4 | 148 |
| forward 3-for-1 | 145 |
| reverse 1-for-15 | 136 |
| reverse 1-for-25 | 131 |
| reverse 1-for-3 | 119 |
| reverse 1-for-100 | 113 |
| forward 5-for-1 | 110 |
- Rows × columns
- 12 × 2
- Computed
- Completeness
- No missing values
- Source
- US exchange, SIP and OPRA market data
- Licence
- Strasmore terms · free, no signup
What each column holds
| Column | Type | Range | Notes |
|---|---|---|---|
label |
text | 12 distinct values | |
splits |
number | 110 to 679 |
Computed from Strasmore's warehouse of US exchange, SIP and OPRA market data. Equity prices are delayed; options greeks and implied volatility are end-of-day. This result is stored, not recomputed on load — it is exactly the numbers that were returned on , and the query below is what returned them.
Run it yourself
This is the exact query behind the result above. Change a ticker, a date or a column and run it against the warehouse — no account, no key. The no-signup tier is smaller than the one this page was computed on; a query that reaches past it comes back saying which plan runs it.
SELECT
concat(direction, ' ', ratio) AS label,
count() AS splits
FROM
(
SELECT
execution_date,
ticker,
any(if(adjustment_type = 'forward_split', 'forward', 'reverse')) AS direction,
concat(toString(toInt32(any(split_to))), '-for-',
toString(toInt32(any(split_from)))) AS ratio
FROM global_markets.stocks_splits
WHERE execution_date >= today() - 1095
AND split_from > 0
AND split_to > 0
GROUP BY execution_date, ticker
)
GROUP BY label
ORDER BY splits DESC
LIMIT 12
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