I think Yahoo had some assets that it sold (like ~$40B worth of Alibaba shares) later on. Did the cash go into YHOO or into the shareholders account in some other way?

IIRC, as part of the merger with Verizon, the Alibaba and Yahoo Japan holdings were spun out into a separate holding company (Altaba?) which was publically traded. A YHOO stockholder would get some amount of Altaba stock, and whatever the Verizon part was (I don't remember if that was Verizon stock, cash, a choice, whatever); probably no fractional shares.

As the holdings were sold, there were large cash dividends, with holdbacks for taxes and contigencies. As the contigencies timed out, smaller dividends happened, and I think Altaba formally wound down with a final dividend earlier this year.