Every share-count adjustment since 2016, by type
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 2026-08-22, from How Often Do Stocks Split?.
| split_type | events |
|---|---|
| Reverse split | 7887 |
| Stock dividend | 2467 |
| Forward split | 1948 |
- Rows × columns
- 3 × 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 |
|---|---|---|---|
split_type |
text | 3 distinct values | |
events |
number | 1,948 to 7,887 |
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.
the exact SQL behind every number
SELECT multiIf(adjustment_type = 'forward_split', 'Forward split',
adjustment_type = 'reverse_split', 'Reverse split',
'Stock dividend') AS split_type,
count() AS events
FROM global_markets.stocks_splits
WHERE execution_date BETWEEN toDate('2016-01-01') AND today()
GROUP BY split_type
ORDER BY events DESC
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