More than a dozen high-dollar contributions funded Bernie Sanders’ policy institute the year before he launched his second presidential bid, including one donation totaling $100,000, according to tax forms filed this month with the Internal Revenue Service.

The Sanders Institute, a progressive think tank founded in 2017 by the Vermont senator’s wife, Jane Sanders, raised more than $361,000 last year from a total of 13 large contributions ranging from $5,000 to $100,000, the tax filing shows.

The institute's executive director, Jane Sanders’ son from a previous marriage, Dave Driscoll, provided a copy of the filing, which is subject to public inspection, and said that most of the high-dollar contributions came from organizations or family foundations and grants. Bernie and Jane Sanders also provided some of that funding, Driscoll said.

Driscoll identified some of the contributors as the National Nurses United, a progressive network of nurses that helped fund Sanders’ 2016 campaign; Our Revolution, the political nonprofit Sanders founded after the primary; and Healthy Housing Foundation, a nonprofit branch of the AIDS Healthcare Foundation focused on providing housing for people with low incomes. The Sanders Institute listed National Nurses United, Our Revolution, and Healthy Housing Foundation as the three partners of the institute’s 2018 gathering.