Golub Capital, a private equity firm, to acquire a minority stake in Nassau Financial, a provider of fixed annuities and asset management, for $200m. “We are excited to expand our investor group as we begin a new strategic partnership with Golub Capital. In addition to their significant capital investment, Golub Capital brings a market-leading track record in direct lending that will expand our balance sheet investment capabilities in support of our continued growth," Phil Gass, Nassau Chairman and CEO.