US stock splits by year: forward and reverse counts, 2017 through July 2026

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 2026-08-04, from How Stock Splits Affect Your Options.

Rows × columns

10 × 3

Computed

2026-08-04

Completeness

No missing values

Source

US exchange, SIP and OPRA market data

Licence

Strasmore terms · free, no signup

Formats

JSON · CSV · the SQL below

What each column holds

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 2026-08-04, and the query below is what returned them.

SELECT toYear(execution_date) AS year,
       countIf(toFloat64(split_to) > toFloat64(split_from)) AS forward_splits,
       countIf(toFloat64(split_to) < toFloat64(split_from)) AS reverse_splits
FROM global_markets.stocks_splits
WHERE execution_date >= toDate('2017-01-01')
  AND execution_date < toDate('2026-08-01')
  AND toFloat64(split_from) > 0
  AND toFloat64(split_to) > 0
GROUP BY year
ORDER BY year