Affiliated Managers Group, Inc.
DE ˙ DB ˙ US0082521081
256,00 € ↓ -2,00 (-0,78%)
2026-06-03
DEL PRIS
SecurityDE:AFS / Affiliated Managers Group, Inc.
InstitutionAssetmark, Inc
Latest Disclosed Ownership27,485 shares
Latest Disclosed Value $ 7,604,995
Assetmark, Inc reports 2.23% decrease in ownership of AFS / Affiliated Managers Group, Inc.

On May 6, 2026 - Assetmark, Inc filed a 13F-HR form disclosing ownership of 27,485 shares of Affiliated Managers Group, Inc. (DE:AFS) valued at $6,486,460 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 28,113 shares of Affiliated Managers Group, Inc.. This represents a change in shares of -2.23% during the quarter. The current value of the position is $7,420,950 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)
2026-05-06 2026-03-31 13F AFFILIATED MANAGERS GROUP COM 008252108 27,485 -628 -2.23 7,605 -6.17 0.0155
2026-01-23 2025-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 28,113 -157 -0.56 8,104 20.24 0.0165
2025-11-06 2025-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 28,270 -1,075 -3.66 6,740 16.73 0.0144
2025-08-04 2025-06-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 29,345 774 2.71 5,774 20.29 0.0136
2025-05-06 2025-03-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 28,571 -146 -0.51 4,801 -9.60 0.0132
2025-02-06 2024-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 28,717 209 0.73 5,310 4.78 0.0144
2024-11-01 2024-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 28,508 239 0.85 5,069 14.76 0.0145
2024-08-13 2024-06-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 28,269 179 0.64 4,416 -6.12 0.0137
2024-05-07 2024-03-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 28,090 -14,632 -34.25 4,704 -27.27 0.0153
2024-02-09 2023-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 42,722 4,084 10.57 6,469 28.44 0.0234
2023-10-27 2023-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 38,638 -1,488 -3.71 5,036 -16.26 0.0201
2023-08-11 2023-06-30 13F AFFILIATED MANAGERS GROUP IN COM COM 008252108 40,126 -11,431 -22.17 6,014 -18.09 0.0236
2023-05-05 2023-03-31 13F AFFILIATED MANAGERS GROUP IN COM COM 008252108 51,557 50,466 4,625.66 7,343 4,168.60 0.0304
2023-02-10 2022-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 1,091 1,079 8,991.67 173 17,100.00 0.0007
2022-11-01 2022-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 12 0 0.00 1 0.00 0.0000
2022-08-03 2022-06-30 13F AFFILIATED MANAGERS GROUP IN COM COM 008252108 12 0 0.00 1 -50.00 0.0000
2022-05-13 2022-03-31 13F AFFILIATED MANAGERS GROUP IN COM COM 008252108 12 12 2 0.0000
2021-08-16 2021-06-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 0 -39 -100.00 0 -100.00
2021-05-14 2021-03-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 39 3 8.33 6 50.00 0.0000
2021-02-10 2020-12-31 13F AFFILIATED MANAGERS GROUP IN COM COM 008252108 36 0 0.00 4 100.00 0.0000
2020-11-13 2020-09-30 13F AFFILIATED MANAGERS GROUP IN COM COM 008252108 36 0 0.00 2 -33.33 0.0000
2020-08-11 2020-06-30 13F AFFILIATED MANAGERS GROUP IN COM COM 008252108 36 12 50.00 3 200.00 0.0000
2020-05-12 2020-03-31 13F AFFILIATED MANAGERS GROUP IN COM COM 008252108 24 24 1 0.0000
2019-08-14 2019-06-30 13F AFFILIATED MANAGERS GROUP IN COM COM 008252108 0 -1 -100.00 0 0.0000
2019-05-14 2019-03-31 13F AFFILIATED MANAGERS GROUP IN COM COM 008252108 1 0 0.00 0 0.0000
2019-02-13 2018-12-31 13F AFFILIATED MANAGERS GROUP COM COM 008252108 1 0 0.00 0 0.0000
2018-11-13 2018-09-30 13F AFFILIATED MANAGERS GROUP COM COM 008252108 1 0 0.00 0 0.0000
2018-08-01 2018-06-30 13F AFFILIATED MANAGERS GROUP COM COM 008252108 1 0 0.00 0 0.0000
2018-05-16 2018-03-31 13F AFFILIATED MANAGERS GROUP COM COM 008252108 1 -37 -97.37 0 -100.00
2018-02-13 2017-12-31 13F AFFILIATED MANAGERS GROUP COM COM 008252108 38 -66 -63.46 8 -60.00 0.0001
2017-11-08 2017-09-30 13F AFFILIATED MANAGERS GROUP COM COM 008252108 104 0 0.00 20 17.65 0.0002
2017-08-14 2017-06-30 13F AFFILIATED MANAGERS GROUP COM COM 008252108 104 8 8.33 17 6.25 0.0002
2017-09-15 2017-03-31 13F/A-1 AFFILIATED MANAGERS GROUP COM COM 008252108 96 -126 -56.76 16 -50.00 0.0002
2017-05-08 2017-03-31 13F AFFILIATED MANAGERS GROUP COM COM 008252108 96 -126 16
2017-09-15 2016-12-31 13F/A-1 AFFILIATED MANAGERS GROUP COM COM 008252108 222 0 0.00 32 0.00 0.0005
2017-02-14 2016-12-31 13F AFFILIATED MANAGERS GROUP COM COM 008252108 222 0 32
2017-09-14 2016-09-30 13F/A-1 AFFILIATED MANAGERS GROUP COM COM 008252108 222 120 117.65 32 128.57 0.0005
2016-11-04 2016-09-30 13F AFFILIATED MANAGERS GROUP COM COM 008252108 222 120 32
2017-09-14 2016-06-30 13F/A-1 AFFILIATED MANAGERS GROUP COM COM 008252108 102 70 218.75 14 180.00 0.0002
2016-08-08 2016-06-30 13F AFFILIATED MANAGERS GROUP COM COM 008252108 102 70 14
2017-09-14 2016-03-31 13F/A-1 AFFILIATED MANAGERS GROUP COM COM 008252108 32 -5,733 -99.44 5 -99.46 0.0001
2016-05-13 2016-03-31 13F AFFILIATED MANAGERS GROUP COM COM 008252108 32 -5,733 5
2017-09-14 2015-12-31 13F/A-1 AFFILIATED MANAGERS GROUP COM COM 008252108 5,765 1,084 23.16 921 15.13 0.0171
2016-02-12 2015-12-31 13F AFFILIATED MANAGERS GROUP COM COM 008252108 5,765 1,084 921
2016-01-05 2015-09-30 13F/A-1 AFFILIATED MANAGERS GROUP COM COM 008252108 4,681 -939 -16.71 800 -34.91 0.0167
2015-11-10 2015-09-30 13F AFFILIATED MANAGERS GROUP COM COM 008252108 4,681 800
2015-08-13 2015-06-30 13F AFFILIATED MANAGERS GROUP COM COM 008252108 5,620 -550 -8.91 1,229 -7.25 0.0256
2015-05-12 2015-03-31 13F AFFILIATED MANAGERS GROUP COM COM 008252108 6,170 6,170 0.00 1,325 0.0282
2015-02-03 2014-12-31 13F AFFILIATED MANAGERS GROUP COM COM 008252108 0 -7,314 -100.00 0 -100.00
2014-11-10 2014-09-30 13F AFFILIATED MANAGERS GROUP COM COM 008252108 7,314 -545 -6.93 1,465 -9.23 0.0339
2014-08-12 2014-06-30 13F AFFILIATED MANAGERS GROUP COM COM 008252108 7,859 -1,960 -19.96 1,614 -17.82 0.0344
2014-05-06 2014-03-31 13F AFFILIATED MANAGERS GROUP COM COM 008252108 9,819 -1,039 -9.57 1,964 -16.60 0.0479
2014-02-11 2013-12-31 13F AFFILIATED MANAGERS GROUP COM COM 008252108 10,858 -1,476 -11.97 2,355 4.53 0.0557
2014-02-11 2013-09-30 13F/A-1 AFFILIATED MANAGERS GROUP COM COM 008252108 12,334 12,334 2,253 0.0569
2013-11-14 2013-09-30 13F AFFILIATED MANAGERS GROUP COM COM 008252108 12,334 2,253 0.0569
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.