I hadn't looked for a while, but Harris was out raising and out spending Trump substantially when I'd last read up on it. Much of that seemed to come primarily from big donors.
Sure the more of the top richest people may have donated more to Trump or Republicans, but Harris raised much more overall.
https://www.forbes.com/sites/alisondurkee/2024/11/04/trump-v...
Seems like they both raised about the same from their top 20 largest donors:
> The Harris campaign received significantly more funding than Trump's, outspending the Republican advertising machine by more than 70 percent in the final stretch of the election.
> According to data from Open Secrets, Harris received almost $400 million from her 20 largest backers. Trump received over half a billion dollars from his top 20, which included over $100 million from SpaceX, Elon Musk's rocket company.
https://www.forbes.com/sites/alisondurkee/2024/11/04/trump-v...
My take of that is that Trump raised a bit more from concentrated donations from the richest billionaires, but Harris overall raised more from larger numbers of billionaires and millionaires.