split_history
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 2026-09-24, from stock-splits-in-japan-trading-units.
| year | forward_splits | reverse_splits |
|---|---|---|
| 2016 | 416 | 725 |
| 2017 | 379 | 701 |
| 2018 | 516 | 524 |
| 2019 | 388 | 606 |
| 2020 | 352 | 679 |
| 2021 | 404 | 488 |
| 2022 | 362 | 622 |
| 2023 | 358 | 834 |
| 2024 | 451 | 867 |
| 2025 | 424 | 1036 |
| 2026 | 315 | 903 |
- Rows × columns
- 11 × 3
- 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 |
|---|---|---|---|
year |
text | 11 distinct values (2016, 2017, 2018…) | |
forward_splits |
number | 315 to 516 | |
reverse_splits |
number | 488 to 1,036 |
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.
WITH split_events AS
(
SELECT
ticker,
execution_date,
any(split_to) AS split_to,
any(split_from) AS split_from
FROM global_markets.stocks_splits
WHERE execution_date >= '2016-01-01'
AND execution_date < today()
GROUP BY ticker, execution_date
)
SELECT
toString(toYear(execution_date)) AS year,
countIf(split_to > split_from) AS forward_splits,
countIf(split_to < split_from) AS reverse_splits
FROM split_events
GROUP BY year
ORDER BY year
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