The question is: "Who owns the MarTech stack?"
Not who manages the tools. Not who has admin credentials. Not which team has budget authority. Who owns it — meaning: who is accountable for its performance, its cost, and its data quality?
There are three types of answers, and each predicts a different kind of audit:
Answer Type 1: "The CMO" (or a VP-level marketing leader).
This is the best answer. It doesn't mean the stack is well-governed — CMOs can own dysfunctional stacks — but it means there's a clear accountability chain. Problems are at least findable. The CMO may have inherited a bad situation; they're aware of it; they've been trying to fix it. The audit will uncover specific, named issues.
Answer Type 2: "IT" (or "it's shared between marketing and IT").
Shared ownership is functional ownership by neither. Marketing doesn't feel empowered to change tools they don't control. IT doesn't understand the marketing use cases well enough to govern for them. The result is a stack that was provisioned once and has drifted ever since. The audit will almost always find stack redundancy, broken integrations, and attribution collapse.
Answer Type 3: "I'm not sure" (or a long pause followed by a name that isn't in the room).
This answer predicts a governance vacuum. No one owns it. The stack is an accretion of tools acquired by people who have since left, in response to problems that may no longer exist. PII sprawl is near-certain. Data silos are guaranteed. The audit scope should double.
The ownership question doesn't tell you what's broken. It tells you how long the problems have been accumulating — and whether fixing them is a technical challenge or a structural one.
The diagnostic value of this question extends beyond the audit. In a PE acquisition context, the answer to "who owns the MarTech stack?" tells you whether the company has the organizational infrastructure to execute a 100-day value creation plan in marketing — or whether the first 30 days post-close will be spent establishing governance that should already exist.
Ask it early. Listen carefully. The rest of the audit is clarifying the answer.