4 institutions reported holding $4.4M of AFFILIATED MANAGERS GROUP (MGRE) in SEC 13F filings for 2026-03-31. Largest institutional holders: SHIKIAR ASSET MANAGEMENT INC ($1.9M), IAT REINSURANCE CO LTD. ($1.8M), Sterling Capital Management LLC ($408,772), SIMPLEX TRADING, LLC ($332,040). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SHIKIAR ASSET MANAGEMENT INC | $1.9M | 84,450 | Added |
| 2 | IAT REINSURANCE CO LTD. | $1.8M | 80,000 | Hold |
| 3 | Sterling Capital Management LLC | $408,772 | 18,200 | Hold |
| 4 | SIMPLEX TRADING, LLC | $332,040 | 1,200 | New |
Source: SEC Form 13F filings · as of 2026-03-31