No. Information on (reverse) stock splits is not included in the NASDAQ's TotalView-ITCH data. The limit order books provided are based on 'historical recordings' of the exchange's activity. There is no retroactive altering of the data to account for future developments such as stock splits.

Should you find the stock price in your data to jump substantially over night, you are encouraged to check for a potential (reverse) stock split or similar events and adjust the data accordingly.

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