Affiliated Managers Group, Inc.
DE ˙ DB ˙ US0082521081
256,00 € ↓ -2,00 (-0,78%)
2026-06-03
CENA AKCJI
SecurityDE:AFS / Affiliated Managers Group, Inc.
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership12,770 shares
Latest Disclosed Value $ 3,537,737
Janus Henderson Group Plc ownership in AFS / Affiliated Managers Group, Inc.

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 12,770 shares of Affiliated Managers Group, Inc. (DE:AFS) valued at $3,013,720 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 12,770 shares of Affiliated Managers Group, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $3,269,120 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-18 2026-03-31 13F/A-1 AFFILIATED MANAGERS GROUP COM 008252108 12,770 0 0.00 3,538 -4.02 0.0006
2026-05-15 2026-03-31 13F AFFILIATED MANAGERS GROUP COM 008252108 12,770 0 3,538 0.0007
2026-02-17 2025-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 12,770 823 6.89 3,685 29.30 0.0017
2025-11-14 2025-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 11,947 0 0.00 2,851 21.43 0.0013
2025-08-14 2025-06-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 11,947 -848 -6.63 2,348 9.62 0.0012
2025-05-15 2025-03-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 12,795 -1,000 -7.25 2,141 -16.17 0.0012
2025-02-14 2024-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 13,795 -700 -4.83 2,554 -0.85 0.0013
2024-11-14 2024-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 14,495 0 0.00 2,577 13.78 0.0013
2024-08-14 2024-06-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 14,495 -172 -1.17 2,264 -7.78 0.0012
2024-05-15 2024-03-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 14,667 -2,900 -16.51 2,455 -7.78 0.0013
2024-02-14 2023-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 17,567 -34 -0.19 2,663 16.04 0.0016
2023-11-14 2023-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 17,601 -4 -0.02 2,295 -13.11 0.0015
2023-08-14 2023-06-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 17,605 -30 -0.17 2,640 5.18 0.0016
2023-05-15 2023-03-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 17,635 9,703 122.33 2,511 99.84 0.0017
2023-02-14 2022-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 7,932 1,400 21.43 1,257 71.82 0.0009
2022-11-14 2022-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 6,532 -2,086 -24.21 731 -27.34 0.0005
2022-08-15 2022-06-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 8,618 -13 -0.15 1,006 -17.27 0.0007
2022-05-16 2022-03-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 8,631 -3 -0.03 1,216 -14.43 0.0006
2022-02-14 2021-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 8,634 4,338 100.98 1,421 118.95 0.0006
2021-11-16 2021-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 4,296 4,296 649 0.0003
2020-05-14 2020-03-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 0 -200,852 -100.00 0 -100.00
2020-02-18 2019-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 200,852 -297,823 -59.72 17,020 -59.05 0.0087
2019-11-14 2019-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 498,675 -66,792 -11.81 41,565 -20.22 0.0225
2019-07-31 2019-06-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 565,467 160,506 39.63 52,102 20.12 0.0284
2019-04-30 2019-03-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 404,961 68,627 20.40 43,376 32.36 0.0240
2019-02-06 2018-12-31 13F AFFILIATED MANAGERS GROUP COM 008252108 336,334 108,438 47.58 32,772 5.17 0.0209
2018-11-09 2018-09-30 13F AFFILIATED MANAGERS GROUP COM 008252108 227,896 -233,169 -50.57 31,160 -54.54 0.0167
2018-08-10 2018-06-30 13F AFFILIATED MANAGERS GROUP COM 008252108 461,065 -77,389 -14.37 68,548 -32.84 0.0391
2018-05-14 2018-03-31 13F AFFILIATED MANAGERS GROUP COM 008252108 538,454 52,278 10.75 102,073 2.29 0.0602
2018-03-12 2017-12-31 13F/A-1 AFFILIATED MANAGERS GROUP COM 008252108 486,176 75,795 18.47 99,789 28.10 0.0614
2018-02-09 2017-12-31 13F AFFILIATED MANAGERS GROUP COM 008252108 486,176 75,795 99,789
2017-11-14 2017-09-30 13F AFFILIATED MANAGERS GROUP COM 008252108 410,381 -108,485 -20.91 77,901 -9.48 0.0499
2017-08-17 2017-06-30 13F/A-1 AFFILIATED MANAGERS GROUP COM 008252108 518,866 399,083 333.17 86,059 338.25 0.0587
2017-08-14 2017-06-30 13F AFFILIATED MANAGERS GROUP COM 008252108 518,866 399,083 86,059
2017-05-03 2017-03-31 13F AFFILIATED MANAGERS GROUP COM 008252108 119,783 -13,942 -10.43 19,637 1.07 0.1379
2017-01-30 2016-12-31 13F AFFILIATED MANAGERS GROUP COM 008252108 133,725 -15,804 -10.57 19,430 -10.20 0.1433
2016-10-24 2016-09-30 13F AFFILIATED MANAGERS GROUP COM 008252108 149,529 -5,141 -3.32 21,637 -0.62 0.1595
2016-07-29 2016-06-30 13F AFFILIATED MANAGERS GROUP COM 008252108 154,670 -19,530 -11.21 21,772 -23.04 0.1810
2016-05-12 2016-03-31 13F AFFILIATED MANAGERS GROUP COM 008252108 174,200 -18,001 -9.37 28,290 -7.87 0.2295
2016-02-03 2015-12-31 13F AFFILIATED MANAGERS GROUP COM 008252108 192,201 -6,258 -3.15 30,706 39.80 0.2464
2015-11-16 2015-09-30 13F AFFILIATED MANAGERS GROUP COM 008252108 198,459 -9,854 -4.73 21,965 -51.77 0.1935
2015-08-17 2015-06-30 13F AFFILIATED MANAGERS GROUP COM 008252108 208,313 -41,789 -16.71 45,538 -15.23 0.3578
2015-06-02 2015-03-31 13F/A-1 AFFILIATED MANAGERS GROUP COM 008252108 250,102 -19,897 -7.37 53,717 -6.26 0.4144
2015-05-15 2015-03-31 13F AFFILIATED MANAGERS GROUP COM 008252108 250,102 29,518
2015-02-12 2014-12-31 13F AFFILIATED MANAGERS GROUP COM 008252108 269,999 260,910 2,870.61 57,304 3,048.57 0.4132
2014-11-12 2014-09-30 13F AFFILIATED MANAGERS GROUP COM 008252108 9,089 0 0.00 1,820 -1.89 0.0171
2014-08-13 2014-06-30 13F AFFILIATED MANAGERS GROUP COM 008252108 9,089 798 9.62 1,855 11.81 0.0173
2014-05-08 2014-03-31 13F AFFILIATED MANAGERS GROUP COM 008252108 8,291 823 11.02 1,659 2.41 0.0162
2014-01-14 2013-12-31 13F AFFILIATED MANAGERS GROUP COM 008252108 7,468 0 0.00 1,620 18.77 0.0164
2013-11-12 2013-09-30 13F AFFILIATED MANAGERS GROUP COM 008252108 7,468 2,020 37.08 1,364 54.30 0.0150
2013-08-15 2013-06-30 13F AFFILIATED MANAGERS GROUP COM 008252108 5,448 5,448 884 0.0103
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.