Affiliated Managers Group, Inc.
US ˙ NYSE ˙ US0082521081

SecurityAMG / Affiliated Managers Group, Inc.
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership974 shares
Latest Disclosed Value $ 280,785
Parallel Advisors, LLC reports 1.42% decrease in ownership of AMG / Affiliated Managers Group, Inc.

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 974 shares of Affiliated Managers Group, Inc. (US:AMG) valued at $280,785 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 988 shares of Affiliated Managers Group, Inc.. This represents a change in shares of -1.42% during the quarter. The current value of the position is $303,508 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)
2026-02-11 2025-12-31 13F AFFILIATED MANAGERS GROUP Stock 008252108 974 -14 -1.42 281 19.15 0.0051
2025-11-13 2025-09-30 13F AFFILIATED MANAGERS GROUP Stock 008252108 988 -10 -1.00 236 19.90 0.0043
2025-07-08 2025-06-30 13F AFFILIATED MANAGERS GROUP Stock 008252108 998 -172 -14.70 196 0.00 0.0039
2025-04-08 2025-03-31 13F AFFILIATED MANAGERS GROUP Stock 008252108 1,170 75 6.85 197 -2.97 0.0044
2025-02-10 2024-12-31 13F AFFILIATED MANAGERS GROUP Stock 008252108 1,095 32 3.01 202 6.88 0.0046
2024-11-13 2024-09-30 13F AFFILIATED MANAGERS GROUP Stock 008252108 1,063 -149 -12.29 189 0.00 0.0044
2024-08-08 2024-06-30 13F AFFILIATED MANAGERS GROUP Stock 008252108 1,212 15 1.25 189 -5.50 0.0049
2024-05-06 2024-03-31 13F AFFILIATED MANAGERS GROUP Stock 008252108 1,197 2 0.17 200 11.11 0.0054
2024-02-12 2023-12-31 13F AFFILIATED MANAGERS GROUP Stock 008252108 1,195 919 332.97 181 414.29 0.0054
2024-05-20 2023-09-30 13F/A-1 AFFILIATED MANAGERS GROUP Stock 008252108 276 -1,509 -84.54 36 -86.89 0.0012
2023-11-14 2023-09-30 13F AFFILIATED MANAGERS GROUP Stock 008252108 276 -1,509 36 0.0012
2024-05-20 2023-06-30 13F/A-1 AFFILIATED MANAGERS GROUP Stock 008252108 1,785 1,498 521.95 268 567.50 0.0086
2023-08-04 2023-06-30 13F AFFILIATED MANAGERS GROUP Stock 008252108 1,785 1,498 268 0.0086
2024-05-20 2023-03-31 13F/A-1 AFFILIATED MANAGERS GROUP Stock 008252108 287 68 31.05 41 17.65 0.0014
2023-04-25 2023-03-31 13F AFFILIATED MANAGERS GROUP Stock 008252108 287 68 41 0.0014
2023-02-06 2022-12-31 13F AFFILIATED MANAGERS GROUP Stock 008252108 219 84 62.22 35 126.67 0.0015
2022-11-10 2022-09-30 13F AFFILIATED MANAGERS GROUP Stock 008252108 135 -106 -43.98 15 -46.43 0.0007
2022-08-01 2022-06-30 13F AFFILIATED MANAGERS GROUP Stock 008252108 241 112 86.82 28 47.37 0.0013
2022-04-28 2022-03-31 13F AFFILIATED MANAGERS GROUP Stock 008252108 129 26 25.24 19 11.76 0.0008
2022-01-20 2021-12-31 13F AFFILIATED MANAGERS GROUP Stock 008252108 103 -25 -19.53 17 -10.53 0.0006
2021-11-02 2021-09-30 13F/A-1 AFFILIATED MANAGERS GROUP Stock 008252108 128 36 39.13 19 35.71 0.0008
2021-10-22 2021-09-30 13F AFFILIATED MANAGERS GROUP Stock 008252108 92 0 14 0.0006
2021-08-06 2021-06-30 13F AFFILIATED MANAGERS GROUP Stock 008252108 92 0 0.00 14 0.00 0.0006
2021-04-23 2021-03-31 13F AFFILIATED MANAGERS GROUP Stock 008252108 92 4 4.55 14 55.56 0.0007
2021-02-02 2020-12-31 13F AFFILIATED MANAGERS GROUP Stock 008252108 88 -76 -46.34 9 -18.18 0.0005
2020-10-27 2020-09-30 13F AFFILIATED MANAGERS GROUP Stock 008252108 164 -18 -9.89 11 -15.38 0.0007
2020-07-16 2020-06-30 13F AFFILIATED MANAGERS GROUP Stock 008252108 182 56 44.44 13 85.71 0.0008
2020-04-27 2020-03-31 13F AFFILIATED MANAGERS GROUP Stock 008252108 126 -44 -25.88 7 -50.00 0.0006
2020-01-30 2019-12-31 13F AFFILIATED MANAGERS GROUP Stock 008252108 170 -65 -27.66 14 -30.00 0.0011
2019-11-01 2019-09-30 13F AFFILIATED MANAGERS GROUP Stock 008252108 235 168 250.75 20 233.33 0.0017
2019-08-05 2019-06-30 13F AFFILIATED MANAGERS GROUP Stock 008252108 67 8 13.56 6 0.00 0.0006
2019-05-01 2019-03-31 13F AFFILIATED MANAGERS GROUP Stock 008252108 59 -88 -59.86 6 -57.14 0.0007
2019-02-05 2018-12-31 13F AFFILIATED MANAGERS GROUP Stock 008252108 147 -130 -46.93 14 -63.16 0.0020
2018-11-01 2018-09-30 13F AFFILIATED MANAGERS GROUP Stock 008252108 277 -348 -55.68 38 -58.70 0.0047
2018-07-30 2018-06-30 13F AFFILIATED MANAGERS GROUP Stock 008252108 625 76 13.84 92 -11.54 0.0132
2018-05-08 2018-03-31 13F AFFILIATED MANAGERS GROUP Stock 008252108 549 0 0.00 104 -7.96 0.0162
2018-02-13 2017-12-31 13F AFFILIATED MANAGERS GROUP COM Stock 008252108 549 -600 -52.22 113 -46.19 0.0185
2017-11-15 2017-09-30 13F/A-1 AFFILIATED MANAGERS GROUP COM Stock 008252108 1,149 -775 -40.28 210 -41.34 0.0361
2017-08-07 2017-06-30 13F AFFILIATED MANAGERS GROUP COM Stock 008252108 1,924 -27 -1.38 358 18.15 0.0675
2017-05-12 2017-03-31 13F/A-1 AFFILIATED MANAGERS GROUP COM Stock 008252108 1,951 -393 -16.77 303 -11.14 0.0602
2017-05-12 2017-03-31 13F AFFILIATED MANAGERS GROUP COM Stock 008252108 1,951 303
2017-02-14 2016-12-31 13F AFFILIATED MANAGERS GROUP COM Stock 008252108 2,344 2,344 341 0.0801
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.