I find is extremely difficult to determine which large companies are self-dealing, since executive and board compensation is not split out in most financial statements. (I can't help but think that this is by design.) So, broadly, I assume all of them are engaged in it unless proven otherwise, which no companies I'm aware of bother to do.
Unless I found some kind of miracle jackpot with the stock reports I've read so far, 100% of them have a section purely devoted to discussing executive/board compensation that is extremely detailed. I know those thick books you get in the mail are daunting, but they do contain a lot of info if you're willing to take the time to read them.
I hate to belabor the obvious, but that means there are companies that disclose this information, and you can choose (or not) to reward them with your investment.
So, I do do that, by investing in equity (as much as I do) with high dividends, since that is orders of magnitude easier to dig up than to find the few companies that are both interesting as a business and also have sufficiently transparent quarterly statements. Time is valuable, after all.
However, to get back to the original point, the current environment of board and c-suite self-dealing will not change until many, many more people invest and think the way I do. For that to happen, the current bias towards capital gains, which your generation grew up on, will need to be wiped out conclusively.
