I’ve been around the Consolidated Audit Trail (CAT) long enough to remember when it was still mostly a noun clause and a gleam in a regulator’s eye. Now it is a fully grown animal—expensive, complicated, and the subject of renewed scrutiny. On April 16, 2026, the SEC issued a concept release asking the public to weigh in on the CAT and other audit trails.
That’s not nothing. Concept releases are how the SEC signals genuine uncertainty—or at least openness to recalibration. As a former regulator who now spends his days helping broker‑dealers and registered investment advisers navigate regulatory gravity, I read this as an invitation worth taking seriously.
To make sense of it, I’ll use the obvious mnemonic: C.A.T.
C is for Cost
The fact sheet is candid in noting that CAT costs have “grown well beyond” the Commission’s earlier estimates. That’s a polite way of saying firms are paying a lot more than anyone signed up for—often with little visibility into how those costs are controlled, allocated, or justified.
The release specifically asks for comment on CAT funding and cost management. That’s a green light for firms to highlight specific concerns: real dollar figures, operational impacts, and trade‑offs between marginal regulatory benefit and very real compliance expense.
A is for Access (and Accountability)
The Commission invites comment on cybersecurity and data privacy risks as well as (according to the fact sheet) “the appropriate balance between privacy and confidentiality considerations, civil liberties protections, and regulatory need.” Indeed, the CAT is built around centralized access to enormous amounts of order, execution, and customer data. That access is the whole point. The SEC says as much—effective oversight of modern, electronic markets depends on accurate, timely cross‑market data. No disagreement there.
But access also demands accountability. When broker-dealers finance a system they don’t control, don’t meaningfully govern, and can’t easily influence, frustration is inevitable. Accountability mechanisms matter because these foster predictability and rational tradeoffs.
T is for Time
The SEC frames this as a comprehensive review of the CAT and other audit trails. That’s not small talk. The Commission is asking fundamental questions about regulatory purpose, scope, and overlap with other data sources.
Building, testing, reporting, correcting, and explaining CAT data consumes compliance hours that could be spent elsewhere—on customer service, supervision, or actually running a business. As an advocate, I see that cost every day. As a former regulator, I know how easy it is to underestimate it.
This concept release is a chance to push the CAT conversation in that direction. The comment period will remain open for 60 days after Federal Register publication. That’s a narrow window to influence the future shape of one of the most ambitious regulatory data projects ever attempted. Firms that sit it out will live with the results.
Because broker‑dealers and advisers didn’t get into this business to serve the SEC or FINRA. They want to spend their time serving their clients. And that, in the end, is something regulators should want too.