Riverstone Holdings is a private equity firm focused on leveraged buyouts and growth capital investments in the Energy industry and electrical power industry sectors. The firm focuses on oil and gas exploration, midstream pipeline, electric generation, energy and power services as well as energy and power technology. The firm is a leading investor in renewable energy infrastructure and technology. Riverstone has given to far Right conservative causes like All Children Matter funded by big players in their financial sectors like the Koch brothers.
Riverstone operates primarily through a joint venture with the Carlyle Group. The firm manages a family of six funds through its joint venture with Carlyle and has raised approximately $17 billion since inception.
The firm, which is based in New York City, was founded in 2000. With offices in New York, London and Houston, Riverstone has committed approximately $15.9 billion to 78 investments in North America, South America, Europe and Asia. 
- $100,000 to All Children Matter a major center of the anti-union, pro school voucher movement started by Richard DeVos and Betsy DeVos. The gift was made between 2005 and 2007.