Note all options after the IPO date will resolve YES. So e.g. if Waymo IPOs in June 2028, then 2028, 2029, and 2030 all resolve YES. (This makes the options all unlinked w/ fixed payout and new answers won't affect existing ones).

Public IPO, listed on a stock exchange. Considers the IPO day, not the announcements in advance.
2025-06-02 clarification: Also includes splitting Waymo out of Google Stock somehow, or SPAC, etc.