> What M&A are you familiar with that they can typically happen in a 6 day timeframe?

Virtually every single bank failure that happens results in an M&A that is negotiated over a weekend.

Most recently Credit Suisse collapsed in March. UBS bought it on Monday, March 19, after negotiations began on Friday, March 16. UBS offered a price that was 60% lower than the Friday closing price. The deal was accepted.