Carlyle Group Inc arranged a first-of-its-kind financing that will commit more than $5bn to seed its next flagship buyout fund while repaying investors in some of its older vintages, according to people with knowledge of the matter.The structured credit deal will total $8.5bn, roughly half of it composed of bank debt, with the rest in preferred equity and common equity, the people said, asking not to be identified discussing confidential details.Carlyle is taking a significant minority position in the common equity with cash from its balance sheet and partners, representing a commitment of a few hundred million dollars, the people said. About $3.5bn of the total assets are stakes in Carlyle’s seventh and eighth buyout funds, they said.A representative for Washington-based Carlyle declined to comment. Bloomberg previously reported that the firm was gauging investor interest on a complex arrangement to kick-start its next fund.The transaction, known internally as “Project Potomac,” marks one of the clearest signs yet of private equity’s growing use of creative debt structures to repay investors as funds take longer to sell portfolio companies. While the firm has yet to begin fundraising for its next flagship fund — Carlyle Partners IX — executives have said they expect to raise roughly as much as the $14.8bn they amassed for Carlyle Partners VIII.Chief Executive Officer Harvey Schwartz approached Carlyle’s AlpInvest secondaries group last year, asking the team to come up with creative ways to drive growth in the private equity business and address investor concerns about liquidity, some of the people said.A strong fundraising start for the ninth vintage may help reassure investors after Carlyle fell well short of the $22bn it had sought for its predecessor. All of the cornerstone investors who committed to the next fund increased their check sizes compared with prior vintages, the people said.Co-President John Redett said last year that Carlyle Partners VII wasn’t “our best work of art,” though its performance has improved more recently, and the eighth fund is on track to be a strong vintage. The firm has focused on investment exits, with recent secondary share offerings for Medline Inc and StandardAero Inc, and said in February it had signed or closed on $7bn of sales.Global head of portfolio finance Michael Hacker led the AlpInvest team that devised the transaction. It has some similarities to a collateralized fund obligation — or CFO — that takes fund stakes and bundles them into a special purpose vehicle, using the combined holdings as collateral to issue debt and equity.CFOs and structures like it are among the fastest-growing areas in the $1tn-plus industry known as fund finance.