
You Are Someone Else's Third-Party Risk: What Vendor Due Diligence Actually Tests in 2026
Amended Regulation S-P now applies to advisers and broker-dealers of every size, and FINRA has been explicit that outsourcing does not transfer supervisory responsibility. The result is that every regulated firm is now both the assessor and the assessed — answering questionnaires it also sends. Here is what those assessments actually test, and why most firms answer the same questions from scratch every time.













