A number of different actors invest in PFS projects. They typically fall into two groups: nonprofit and philanthropic funders (e.g. Rockefeller Foundation, Laura and John Arnold Foundation, United Way, etc.) and private investors (e.g. Bank of America, Goldman Sachs, Santander, etc.). In deals, organizations from each investor group are present. Philanthropic funders often play an important catalytic role in attracting private investors by offering guarantees, providing grants, or investing as junior lenders. Private investors, often encouraged by high-net worth individuals, are motivated by the double bottom line of potential financial returns and social impact.