The original statement is so vague and meaningless it's hardly worth bothering to discuss.
43% of companies that have diverse management report higher profits
Higher than what? Their profits last year? other companies? Or the cost of a tin of beans? I've no idea, it's nonsense.
But it does imply that, whatever the positive measure is, 57% of the companies that have diverse management must have lower profits than whatever thing the above is comparing against. It's extremely unlikely that any company would have identical profits to that other thing, even if it's 1p different then it's higher or lower, so every member of the group must be either higher or lower. It looks like someone's been attempting to spin bad news as good, by giving selective facts and not giving any source. It's more likely it's just made-up, and the person writing it didn't consider the full implications of their statement.
Alternatively, it may be possible that an unknown percentage didn't report anything at all. But without the full results of whatever survey it's supposed to be the results of, nobody can possibly say.