Of an Estimated $72B Raised by U.S. Buyout Sponsors Through Mid-Year, 43% Has Gone to Mega-Funds  PE Hub opines that while many LPs claim they favor small- to mid-sized business investments, that this year the numbers are beginning to tell a different story.   There is increased investment in buyout funds doing deals of $1 billion or more in size.   It may be that mega-funds  while less are simply the only place public pensions and other big institutions can deploy the large slugs of the capital needed to keep their GP stables a manageable size: