Sixteen Thirty Fund

The Sixteen Thirty Fund is the political advocacy powerhouse of the Arabella Advisors network — a 501(c)(4) social welfare organization that has become the single largest dark money group on the American left. Named after its Washington, D.C. office address at 1630 Connecticut Avenue, the Sixteen Thirty Fund spent over $410 million in the 2020 election cycle alone, exceeding the combined dark money spending of all conservative 501(c)(4) groups that year. The fund operates as a fiscal sponsor, housing dozens of pop-up advocacy projects that appear to be independent organizations but are actually campaigns operating under the Sixteen Thirty Fund's tax-exempt umbrella. These projects have included Demand Justice (judicial nominations), the Hub Project (swing-state issue advocacy), Restore Public Trust (government ethics), and dozens of others that launch, spend millions, and dissolve within a single election cycle. The fiscal sponsorship model is the key anonymity mechanism: donors contribute to the Sixteen Thirty Fund, which is not required to disclose contributors under 501(c)(4) rules. The fund then allocates money to its housed projects, which have no separate legal existence and file no independent tax returns. This means there is no public paper trail connecting a donor's contribution to the specific campaign it funded. The Sixteen Thirty Fund has been particularly active in ballot measure campaigns, spending heavily on measures related to minimum wage increases, Medicaid expansion, abortion rights, marijuana legalization, and voting access. In 2024, the fund deployed approximately $200 million across issue advertising, grassroots organizing, and ballot measure support in battleground states. The organization's rapid growth — from $9 million in revenue in 2015 to over $400 million in 2020 — tracks with the broader explosion of progressive dark money that has made Democrats' calls for campaign finance reform increasingly hypocritical. The Sixteen Thirty Fund is managed by Arabella Advisors, which provides staffing, financial management, and strategic consulting in exchange for management fees.