Private Foundation Assets Up 48 Percent Since Recession, Report Finds

2. Despite nearly uniform investment portfolio performance for foundations of every size, the resulting endowment balances were surprisingly inconsistent: While midsized ($1M -$10M) and larger foundations ($10M-$50M) enjoyed steady and robust endowment gains, the endowments of smaller foundations (less than $1M) remained flat. This was likely because smaller foundations typically distribute a greater percentage of their assets than their larger counterparts.