Who owns the companies here
Managers
The 587 largest institutional managers holding the companies this site covers, ranked by the value they reported on Form 13F for the quarter ended 31-mar-2026. Where a manager files through several entities they are counted once, under the family, rather than once as the family and again as each arm. 9 of them have had their own filing read in full, so their whole reported book is shown alongside.
Ranked by reported value
This is not assets under management. A 13F reports US listed, long, US custodied positions, so a manager’s real business is larger than any figure here, and the middle column counts only the companies this site covers. Where a manager’s own filing has been read, the last column is its WHOLE reported book, which is both larger and a quarter newer, so the two columns are not comparable and are not meant to be.
What this page is not
Positions in the companies this site covers, from 13F filings, which report US listed, long, US custodied holdings. A manager's real book is larger than this in every case: anything outside the index, outside US custody, held through derivatives, or below its reporting obligation is not here.
