13F Homework stock by stock: who did what this quarter

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Top 500 managers by reported value. A line joins two managers that opened or added the same stocks this quarter, weighted so that rarely bought stocks count more. Click a dot.

Source: SEC Form 13F Data Sets (every 13F-HR filed with the SEC), equity long positions only. 13F covers US-listed long positions and options of managers with ≥$100M; no shorts, no bonds, no non-US holdings; filed up to 45 days after quarter end. Positions are matched across quarters by CUSIP, with CUSIP changes detected by holder overlap and splits by median share ratio. Counts of managers are across all filers; the manager lists name only the 500 largest. Styles are rule-based on each manager's own filing (Styles tab). Nothing here is investment advice.