The 50 most-backed labor unions in the United States are ranked by their centrality in the sector's funding network — a measure of how embedded they are through grants received, board connections, and shared funders.
The largest are Education Minnesota, Painters D C No 30 Labor Management Industry Developement Fund, and Screen Actors Guild- American Federation Of Television And Radio.
Ranked by sector centrality (ImpactRank over the funder graph).