The Sunlight on SuperPACs Act of 2026 requires independent political committees known as SuperPACs to disclose their top three donors on any campaign advertisements they fund. When a SuperPAC spends $10,000 or more on ads that explicitly support or oppose a candidate, it must now display the names and contribution amounts of its three largest donors who gave $5,000 or more in the previous 12 months, and if any of those top donors are themselves political committees, the law requires disclosure of that committee's two largest donors as well. The bill affects SuperPACs and voters nationwide, with supporters arguing that transparency about funding sources helps voters make informed decisions about political advertisements. The legislation takes effect on January 1, 2027, and is modeled after recent state-level disclosure laws in Alaska, Arizona, and San Francisco that courts have upheld as constitutional. The bill was introduced by a bipartisan group of representatives including Ms. Kaptur and Mr. Mullin in September 2026.