Arabella Advisors

Arabella Advisors is a Washington, D.C.–based for-profit consulting company that advises left-leaning donors and nonprofits about where to give money and serves as the hub of a politically liberal "dark money" network. It was founded by former Clinton administration appointee Eric Kessler. The Arabella network spent nearly $1.2 billion in 2020 and raised $1.6 billion that same year. In 2022, Arabella raised $1.3 billion and spent $900 million. In 2023, Arabella raised more than $1.3 billion in anonymous donations and sent nearly $1.5 billion to other organizations. Between Arabella's founding in 2005 and 2021, Arabella took in $6.5 billion, the vast majority of which flowed to policy and litigation groups on the left.

Organizations incubated by and affiliated with Arabella Advisors include the Sixteen Thirty Fund, the New Venture Fund, the Hopewell Fund, the Windward Fund, the North Fund, and the Telescope Fund. These groups have been active in various efforts to oppose the Trump administration and to organize opposition to numerous Republican politicians and policies.

According to The Atlantic, Arabella Advisors has "undeniably benefited from the rush of panicked political giving on the left during the Trump years." In 2020, the Sixteen Thirty Fund donated $410 million toward defeating Trump and winning Democratic control of the U.S. Senate. Because of the way they are legally structured, Arabella Advisors and its affiliated groups are not required to disclose their donors, and they have not opted to do so. Billionaires George Soros and Pierre Omidyar have disclosed multi-million donations to the network. Politico has described the Sixteen Thirty Fund as a "left-leaning, secret-money group", writing that the group "illustrates the extent to which the left embraced the use of 'dark money' to fight for its causes in recent years. After decrying big-money Republican donors over the last decade, as well as the Supreme Court rulings that flooded politics with more cash, Democrats now benefit from hundreds of millions of dollars of undisclosed donations as well."