Arabella Advisors

Arabella Advisors, now operating as Sunflower Services, is a Washington, D.C.–based limited liability corporation that advises left-leaning donors and nonprofits about where to give money and manages several dark money groups supportive of the Democratic Party and the progressive movement. It was founded in 2005 by former Clinton administration appointee Eric Kessler. Between Arabella's founding in 2005 and 2021, Arabella raised $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.

In November 2025, Arabella Advisors announced that it was rebranding to Sunflower Services, a new entity that will continue managing fiscal sponsorships for progressive advocacy groups. According to the Washington Free Beacon, "Under the rebrand, things will remain functionally the same for Arabella's dark money network, including the New Venture Fund, Windward Fund, and Hopewell Fund." The Chronicle of Philanthropy wrote that "This change marks a significant shift for the consultancy world, in which Arabella was among the best-known and most controversial entities of its kind."