Forward and reverse splits by year across US listings

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 Do Stock Splits Change Your Dividend?.

Rows × columns

10 × 3

Computed

2026-08-22

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 2026-08-22, and the query below is what returned them.

SELECT
    toString(toYear(execution_date))  AS year,
    countIf(split_to > split_from)    AS forward_splits,
    countIf(split_to < split_from)    AS reverse_splits
FROM
(
    SELECT
        execution_date,
        ticker,
        max(split_from) AS split_from,
        max(split_to)   AS split_to
    FROM global_markets.stocks_splits
    WHERE execution_date >= addYears(toStartOfYear(today()), -10)
      AND execution_date <  toStartOfYear(today())
      AND ticker NOT IN ('SPCX')
    GROUP BY execution_date, ticker
)
GROUP BY year
ORDER BY year