AUM (assets under management) is the total market value of the investments a firm manages on behalf of its clients. It is a core measure of a manager's size and, for many filings, a regulatory threshold.
AUM is both a scale metric and a trigger. A manager crossing $100M in 13(f) securities must begin filing 13F; SEC registration and other obligations also key off AUM bands. Note that 13F AUM (only 13(f) securities, long only) is narrower than a firm's headline AUM.
Because AUM is self-reported and defined differently across contexts (gross vs. net, regulatory vs. marketing), comparing it across managers requires knowing exactly which definition each figure uses.
A fund managing $100M+ of U.S.-listed equities crosses the 13F threshold and must start filing quarterly holdings.
AUM context lets you weight a position: a $50M stake means very different things at a $200M fund versus a $50B one.
Arkolith turns this into live, sourced data your agent can query — SEC filings, insider activity, and market data behind one key, every datapoint traceable to its origin.