Affiliated Managers Group
Held by 3 superinvestors (AMG).
Educational data only — not investment advice. 13F positions are self-reported and can lag up to 45 days.
Affiliated Managers Group (AMG) is held by 3 of the superinvestors tracked on Compounder, with a combined $297.8M in reported 13F value. The largest position belongs to John Rogers, where it makes up 3.3% of the portfolio.
Other notable holders by value include Ray Dalio (0.0% of its book) and Mason Hawkins (0.1% of its book).
Over the latest quarter, 0 of the tracked filers opened a new position in AMG, 0 added to existing ones, 2 trimmed, and 0 sold out entirely.
Holder counts and values reflect the most recent SEC Form 13F filings, through the quarter ended 2026-03-31. Source: SEC EDGAR. A 13F shows only long US-listed positions and can lag the real portfolio by up to 45 days, so this is disclosed long ownership, not a complete picture.
Superinvestors holding this security over the last 8 quarters: 3 → 3.
Early quarters may understate holder counts due to data backfill — read the slope with care.
- Value$294.4MWeight (prev→now)3.7% → 3.3% ▼
- Value$1.8MWeight (prev→now)0.0% → 0.0% ▼
- Value$1.5MWeight (prev→now)0.1% → 0.1%
Sources· SEC EDGAR 13F as of 2026-05-15
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