WA SB5439

Prohibits the Washington State Investment Board from making new investments in thermal coal companies effective immediately, with full divestment required by January 1, 2030

Defines "thermal coal company" as companies deriving 10%+ revenue from thermal coal activities, generating 10%+ power from coal, producing 10+ million tons annually, or having 5+ gigawatts of coal-fired capacity

Allows the board to retain investments in thermal coal companies that demonstrate they are transitioning to clean energy on a reasonable timeline aligned with UN climate guidelines

Requires annual reports to the legislature starting December 15, 2025, on divestment progress until no subject funds remain invested in thermal coal companies

Directs the Department of Ecology to annually review the "thermal coal company" definition beginning January 1, 2030, comparing it to Urgewald organization standards