Affiliated Managers Group, Inc.
US ˙ NYSE ˙ US0082521081

SecurityAMG / Affiliated Managers Group, Inc.
InstitutionLsv Asset Management
Latest Disclosed Ownership476,811 shares
Latest Disclosed Value $ 131,934
Lsv Asset Management reports 0.80% increase in ownership of AMG / Affiliated Managers Group, Inc.

On May 11, 2026 - Lsv Asset Management filed a 13F-HR form disclosing ownership of 476,811 shares of Affiliated Managers Group, Inc. (US:AMG) valued at $131,933,604 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 473,021 shares of Affiliated Managers Group, Inc.. This represents a change in shares of 0.80% during the quarter. The current value of the position is $160,594,713 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-11 2026-03-31 13F Affiliated Managers Group COM 008252108 476,811 3,790 0.80 132 -3.68 0.2843
2026-02-06 2025-12-31 13F Affiliated Managers Group COM 008252108 473,021 -6,603 -1.38 136 19.30 0.2974
2025-11-06 2025-09-30 13F Affiliated Managers Group COM 008252108 479,624 3,400 0.71 114 22.58 0.2525
2025-08-11 2025-06-30 13F Affiliated Managers Group COM 008252108 476,224 8,140 1.74 94 19.23 0.2194
2025-05-09 2025-03-31 13F Affiliated Managers Group COM 008252108 468,084 44,090 10.40 79 0.00 0.1888
2025-02-13 2024-12-31 13F Affiliated Managers Group COM 008252108 423,994 187,290 79.12 78 85.71 0.1810
2024-11-12 2024-09-30 13F Affiliated Managers Group COM 008252108 236,704 -3,800 -1.58 42 13.51 0.0902
2024-08-06 2024-06-30 13F Affiliated Managers Group COM 008252108 240,504 2,000 0.84 38 -5.13 0.0823
2024-05-06 2024-03-31 13F Affiliated Managers Group COM 008252108 238,504 23,454 10.91 40 21.88 0.0826
2024-02-06 2023-12-31 13F Affiliated Managers Group COM 008252108 215,050 21,074 10.86 33 28.00 0.0711
2023-11-03 2023-09-30 13F Affiliated Managers Group COM 008252108 193,976 -400 -0.21 25 -13.79 0.0588
2023-08-02 2023-06-30 13F Affiliated Managers Group COM 008252108 194,376 28,837 17.42 29 26.09 0.0642
2023-05-02 2023-03-31 13F Affiliated Managers Group COM 008252108 165,539 -850 -0.51 24 -11.54 0.0529
2023-02-08 2022-12-31 13F Affiliated Managers Group COM 008252108 166,389 -9,800 -5.56 26 -99.87 0.0581
2022-11-07 2022-09-30 13F/A-1 Affiliated Managers Group COM 008252108 176,189 3,600 2.09 19,707 -2.07 0.0463
2022-11-04 2022-09-30 13F Affiliated Managers Group COM 008252108 172,589 0 20,124 0.0435
2022-08-10 2022-06-30 13F Affiliated Managers Group COM 008252108 172,589 108,666 170.00 20,124 123.35 0.0435
2022-05-12 2022-03-31 13F Affiliated Managers Group COM 008252108 63,923 20,202 46.21 9,010 25.26 0.0165
2022-01-28 2021-12-31 13F Affiliated Managers Group COM 008252108 43,721 0 0.00 7,193 8.90 0.0127
2021-11-04 2021-09-30 13F Affiliated Managers Group COM 008252108 43,721 0 0.00 6,605 -2.03 0.0119
2021-08-04 2021-06-30 13F Affiliated Managers Group COM 008252108 43,721 -1,100 -2.45 6,742 0.94 0.0115
2021-04-30 2021-03-31 13F Affiliated Managers Group COM 008252108 44,821 -2,000 -4.27 6,679 40.29 0.0114
2021-02-08 2020-12-31 13F Affiliated Managers Group COM 008252108 46,821 0 0.00 4,761 48.73 0.0087
2020-10-23 2020-09-30 13F Affiliated Managers Group COM 008252108 46,821 0 0.00 3,201 -8.28 0.0065
2020-08-05 2020-06-30 13F Affiliated Managers Group COM 008252108 46,821 45,321 3,021.40 3,490 3,865.91 0.0072
2020-05-07 2020-03-31 13F Affiliated Managers Group COM 008252108 1,500 0 0.00 88 -30.71 0.0002
2020-02-10 2019-12-31 13F Affiliated Managers Group COM 008252108 1,500 0 0.00 127 1.60 0.0002
2019-11-07 2019-09-30 13F Affiliated Managers Group COM 008252108 1,500 0 0.00 125 -9.42 0.0002
2019-08-08 2019-06-30 13F/A-1 Affiliated Managers Group COM 008252108 1,500 -700 -31.82 138 -41.28 0.0002
2019-08-07 2019-06-30 13F Affiliated Managers Group COM 008252108 2,200 0 235
2019-05-07 2019-03-31 13F Affiliated Managers Group COM 008252108 2,200 0 0.00 235 9.81 0.0004
2019-02-05 2018-12-31 13F Affiliated Managers Group COM 008252108 2,200 2,200 214 0.0004
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.