With spinoff, you generally have until the day of actual distribution to buy the stock and still receive the additional shares. Here's two examples where the ex-dividend date is the day of the distribution date (SEC law I believe), regardless of what date the PR says is the record date:
Just like a stock split, a record date is announced days or weeks ahead of the actual stock split, but you still get your shares if you're a buyer just the very day before. UWKI's PR says distribution date of the 20th so buyers on the 19th should still get the spinoff shares.
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