Affiliated Managers Group, Inc.
US ˙ NYSE ˙ US0082521081

SecurityAMG / Affiliated Managers Group, Inc.
InstitutionSquarepoint Ops LLC
Latest Disclosed Ownership5,113 shares
Latest Disclosed Value $ 1,414,767
Squarepoint Ops LLC ownership in AMG / Affiliated Managers Group, Inc.

On May 15, 2026 - Squarepoint Ops LLC filed a 13F-HR form disclosing ownership of 5,113 shares of Affiliated Managers Group, Inc. (US:AMG) valued at $1,414,767 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 23,519 shares of Affiliated Managers Group, Inc.. This represents a change in shares of -78.26% during the quarter. The current value of the position is $1,593,262 USD.

Squarepoint Ops LLC has a history of taking positions in derivatives of the underlying security (AMG) in the form of stock options. The firm currently holds call options representing 2,500 of underlying shares valued at $691,750 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

AMG / Affiliated Managers Group, Inc. Historical Put/Call Ratio
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)
2026-05-15 2026-03-31 13F AFFILIATED MANAGERS GROUP COM 008252108 5,113 -18,406 -78.26 1,415 -79.14 0.0017
2026-02-13 2025-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 23,519 21,334 976.38 6,780 1,203.85 0.0072
2025-11-14 2025-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 2,185 -46 -2.06 521 18.72 0.0005
2025-08-27 2025-06-30 13F/A-1 AFFILIATED MANAGERS GROUP IN COM 008252108 2,231 2,231 439 0.0005
2025-08-14 2025-06-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 2,231 2,231 439 0.0005
2025-08-27 2025-03-31 13F/A-1 AFFILIATED MANAGERS GROUP IN COM 008252108 0 -1,148 -100.00 0 -100.00
2025-05-15 2025-03-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 0 -1,148 0
2025-02-14 2024-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 1,148 -1,998 -63.51 212 -62.08 0.0002
2024-11-14 2024-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 3,146 3,146 559 0.0009
2024-05-15 2024-03-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 0 -7,772 -100.00 0 -100.00
2024-02-14 2023-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 7,772 -16,135 -67.49 1,177 -62.26 0.0022
2023-11-14 2023-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 23,907 17,243 258.75 3,116 212.22 0.0077
2023-08-14 2023-06-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 6,664 -34,966 -83.99 999 -83.16 0.0031
2023-05-15 2023-03-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 41,630 41,630 5,929 0.0242
2022-11-14 2022-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 0 -2,859 -100.00 0 -100.00
2022-08-15 2022-06-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 2,859 1,361 90.85 333 57.82 0.0019
2022-05-16 2022-03-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 1,498 -2,647 -63.86 211 -69.06 0.0009
2022-02-14 2021-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 4,145 -4,233 -50.53 682 -46.13 0.0018
2021-11-15 2021-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 8,378 -8,234 -49.57 1,266 -50.59 0.0036
2021-08-16 2021-06-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 16,612 -4,807 -22.44 2,562 -19.74 0.0097
2021-05-17 2021-03-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 21,419 8,304 63.32 3,192 139.28 0.0187
2021-02-16 2020-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 13,115 13,115 1,334 0.0100
2020-05-15 2020-03-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 0 -32,900 -100.00 0 -100.00
2020-02-14 2019-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 32,900 32,900 2,788 0.0166
2019-11-14 2019-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 0 -20,307 -100.00 0 -100.00
2019-08-14 2019-06-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 20,307 20,307 1,871 0.0182
2019-05-15 2019-03-31 13F AFFILIATED MANAGERS GROUP COM 008252108 0 -40,300 -100.00 0 -100.00
2019-02-14 2018-12-31 13F AFFILIATED MANAGERS GROUP COM 008252108 40,300 -41,510 -50.74 3,927 -64.89 0.0457
2018-11-14 2018-09-30 13F AFFILIATED MANAGERS GROUP COM 008252108 81,810 20,531 33.50 11,185 22.78 0.1338
2018-08-14 2018-06-30 13F AFFILIATED MANAGERS GROUP COM 008252108 61,279 25,229 69.98 9,110 33.30 0.1207
2018-05-15 2018-03-31 13F AFFILIATED MANAGERS GROUP COM 008252108 36,050 36,050 6,834 0.1085
2017-11-14 2017-09-30 13F AFFILIATED MANAGERS GROUP COM 008252108 0 -6,206 -100.00 0 -100.00
2017-08-14 2017-06-30 13F AFFILIATED MANAGERS GROUP COM 008252108 6,206 6,206 1,029 0.0202
2017-02-14 2016-12-31 13F AFFILIATED MANAGERS GROUP COM 008252108 0 -1,981 -100.00 0 -100.00
2016-11-14 2016-09-30 13F AFFILIATED MANAGERS GROUP COM 008252108 1,981 -426 -17.70 287 -15.34 0.0191
2016-08-15 2016-06-30 13F AFFILIATED MANAGERS GROUP COM 008252108 2,407 2,407 0.00 339 0.0212
2016-05-16 2016-03-31 13F AFFILIATED MANAGERS GROUP COM 008252108 0 -4,107 -100.00 0 -100.00
2016-02-16 2015-12-31 13F AFFILIATED MANAGERS GROUP COM 008252108 4,107 4,107 0.00 656 0.0719
2015-08-14 2015-06-30 13F AFFILIATED MANAGERS GROUP COM 008252108 0 -3,814 -100.00 0 -100.00
2015-05-19 2015-03-31 13F/A-1 AFFILIATED MANAGERS GROUP COM 008252108 3,814 3,814 819 0.2868
2015-05-15 2015-03-31 13F AFFILIATED MANAGERS GROUP COM 008252108 3,814 819 0.2868
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F AFFILIATED MANAGERS GROUP COM Call 2,500 692 n/a n/a n/a
2024-08-14 2024-06-30 13F AFFILIATED MANAGERS GROUP IN COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F AFFILIATED MANAGERS GROUP IN COM Call 9,600 -50.52 1,608 -45.28 n/a n/a n/a
2024-02-14 2023-12-31 13F AFFILIATED MANAGERS GROUP IN COM Call 19,400 304.17 2,938 369.92 n/a n/a n/a
2023-11-14 2023-09-30 13F AFFILIATED MANAGERS GROUP IN COM Call 4,800 0.00 626 -13.07 n/a n/a n/a
2023-08-14 2023-06-30 13F AFFILIATED MANAGERS GROUP IN COM Call 4,800 -79.04 719 -77.95 n/a n/a n/a
2023-05-15 2023-03-31 13F AFFILIATED MANAGERS GROUP IN COM Call 22,900 26.52 3,261 13.74 n/a n/a n/a
2023-02-14 2022-12-31 13F AFFILIATED MANAGERS GROUP IN COM Call 18,100 2,868 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2024-08-14 2024-06-30 13F AFFILIATED MANAGERS GROUP IN COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F AFFILIATED MANAGERS GROUP IN COM Put 4,800 -82.86 804 -81.06 n/a n/a n/a
2024-02-14 2023-12-31 13F AFFILIATED MANAGERS GROUP IN COM Put 28,000 1,066.67 4,240 1,258.65 n/a n/a n/a
2023-11-14 2023-09-30 13F AFFILIATED MANAGERS GROUP IN COM Put 2,400 -31.43 313 -40.46 n/a n/a n/a
2023-08-14 2023-06-30 13F AFFILIATED MANAGERS GROUP IN COM Put 3,500 -81.77 525 -80.83 n/a n/a n/a
2023-05-15 2023-03-31 13F AFFILIATED MANAGERS GROUP IN COM Put 19,200 7.26 2,734 -3.56 n/a n/a n/a
2023-02-14 2022-12-31 13F AFFILIATED MANAGERS GROUP IN COM Put 17,900 2,836 n/a n/a n/a
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.