CMS is conducting market research via this Sources Sought Notice to identify small businesses—including 8(a), SDVOSB, HUBZone, small disadvantaged, veteran-owned, and woman-owned firms—able to provide ACO Medicare Shared Savings Program financial services under a draft SOW. The contractor would primarily issue EFT payments to ACOs and also validate payees, monitor and reconcile transactions, provide reporting, issue IRS 1099 forms, maintain a CMS-approved bank account, and support financial management/funds control in compliance with government rules. Offerors must be free of conflicts of interest or able to provide an OCI mitigation plan, and must maintain SAM registration. The MSSP context includes 511 ACOs serving 12.6 million beneficiaries as of January 1, 2026, and an Advance Investment Payment option of $250,000 upfront plus two years of quarterly payments for eligible ACOs. Responses may come from small businesses and teaming arrangements/JVs, with capability statements demonstrating relevant EFT, financial reporting, reconciliation, and bank-account management experience; a potential small-business set-aside would require at least 50% of personnel performance costs to go to the concern’s employees.