Regulatory AUM and 13F value answer different questions

Start with the reporting system

Form ADV and Form 13F were created for different regulatory purposes. Form ADV describes an investment adviser, its business, and its regulatory reporting. Form 13F describes specified securities over which a qualifying institutional investment manager exercises investment discretion at a quarter end.

A useful comparison therefore begins with the form, filer, reporting period, and field definition—not the size of the number.

What regulatory AUM represents

Regulatory AUM follows the calculation framework in the Form ADV instructions. The reported value belongs to a dated adviser filing and should remain connected to that filing, its amendment history, and the applicable instruction set.

• It is tied to an adviser record and filing date.
• It follows Form ADV definitions rather than a marketing definition of AUM.
• It can cover a different asset universe from a 13F information table.

What Form 13F value represents

A Form 13F information table reports positions in securities covered by the Section 13(f) reporting framework. The report is dated to a quarter end and can be filed weeks later. It excludes many exposures and does not reveal activity after the report period.

• It is a quarterly reported holdings measure.
• It is limited to reportable Section 13(f) securities and reportable positions.
• It should be interpreted with the filing type, report period, accession number, and amendments.

Why a percentage comparison can mislead

Dividing Form 13F value by regulatory AUM can create a precise-looking percentage without creating a comparable denominator. The adviser record and the institutional filing may cover different legal entities, accounts, asset classes, valuation dates, and reporting rules. Even a correctly calculated ratio can therefore imply a relationship that the underlying forms do not establish.

Before publishing a comparison, identify the legal entities on both sides, align the source dates as closely as the records allow, and explain what each universe includes. If those conditions cannot be met, show the two measures separately instead of forcing them into one metric.

A defensible comparison workflow

When comparing firms or managers, keep each measure in its native context. Display the label and date, identify the source form, and explain the population included. If you calculate a ratio or change, label it as a calculation rather than a filer-reported fact.

• Confirm that the adviser and filing manager are actually the same or a documented related entity.
• Compare like reporting periods where possible.
• Preserve missing, zero, not applicable, and not reported as different states.
• Link every material value to the underlying public filing.