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Affiliated Managers Group
AMG

450 hedge funds and large institutions have $6.32B invested in Affiliated Managers Group in 2025 Q3 according to their latest regulatory filings, with 59 funds opening new positions, 141 increasing their positions, 163 reducing their positions, and 36 closing their positions.

New
Increased
Maintained
Reduced
Closed

64% more first-time investments, than exits

New positions opened: 59 | Existing positions closed: 36

32% more call options, than puts

Call options by funds: $4.08M | Put options by funds: $3.1M

20% more capital invested

Capital invested by funds: $5.28B → $6.32B (+$1.03B)

17% more funds holding in top 10

Funds holding in top 10: 6 → 7 (+1)

4% more funds holding

Funds holding: 433 → 450 (+17)

1.24% less ownership

Funds ownership: 94.46% → 93.22% (-1.2%)

13% less repeat investments, than reductions

Existing positions increased: 141 | Existing positions reduced: 163

Holders
450
Holders Change
+17
Holders Change %
+3.93%
% of All Funds
5.91%
Holding in Top 10
7
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+16.67%
% of All Funds
0.09%
New
59
Increased
141
Reduced
163
Closed
36
Calls
$4.08M
Puts
$3.1M
Net Calls
+$978K
Net Calls Change
-$3.31M

Top Buyers

1
Alyeska Investment Group
Alyeska Investment Group
Illinois
+$65M
2
UBS Group
UBS Group
Switzerland
+$38.1M
3
Holocene Advisors
Holocene Advisors
New York
+$33.7M
4
Caisse de Depot et Placement du Quebec (CDPQ)
Caisse de Depot et Placement du Quebec (CDPQ)
Quebec, Canada
+$21.7M
5
Raymond James Financial
Raymond James Financial
Florida
+$16.6M

Top Sellers

1
Millennium Management
Millennium Management
New York
-$122M
2
CCP
Clarkston Capital Partners
Michigan
-$44.7M
3
BA
Bridgewater Associates
Connecticut
-$21.1M
4
AI
Ariel Investments
Illinois
-$20.1M
5
Morgan Stanley
Morgan Stanley
New York
-$16.7M
Name Holding Trade Value Shares
Change 		Change in
Stake
Norges Bank
451
Norges Bank
Norway
– -$71.8M -364,786 Closed
ICM
452
Invenomic Capital Management
Massachusetts
– -$4.41M -22,398 Closed
FGP
453
Freestone Grove Partners
California
– -$3.73M -18,940 Closed
Tudor Investment Corp
454
Tudor Investment Corp
Connecticut
– -$3.25M -16,498 Closed
BCM
455
Basswood Capital Management
New York
– -$3.14M -15,955 Closed
XT
456
XTX Topco
Cayman Islands
– -$2.36M -12,013 Closed
Natixis Advisors
457
Natixis Advisors
Massachusetts
– -$2.34M -11,902 Closed
PE
458
Point72 Europe
United Kingdom
– -$2.13M -10,838 Closed
BAM
459
Bastion Asset Management
Canada
– -$1.84M -9,808 Closed
Qube Research & Technologies (QRT)
460
Qube Research & Technologies (QRT)
United Kingdom
– -$1.56M -7,939 Closed
YIH
461
Y-Intercept (HK)
Hong Kong
– -$916K -4,657 Closed
SSA
462
Schonfeld Strategic Advisors
New York
– -$831K -4,221 Closed
MWM
463
Mission Wealth Management
California
– -$677K -3,443 Closed
CC
464
Centiva Capital
New York
– -$663K -3,371 Closed
RAM
465
Readystate Asset Management
Illinois
– -$588K -2,986 Closed
LAM
466
LECAP Asset Management
United Kingdom
– -$494K -2,509 Closed
IFU
467
iSAM Funds (UK)
United Kingdom
– -$487K -2,473 Closed
OTPPB
468
Ontario Teachers' Pension Plan Board
Ontario, Canada
– -$421K -2,139 Closed
Aviva
469
Aviva
United Kingdom
– -$410K -2,085 Closed
CP
470
CenterBook Partners
Connecticut
– -$406K -2,063 Closed
ACM
471
Aquatic Capital Management
Illinois
– -$366K -1,859 Closed
IPW
472
Impact Partnership Wealth
Georgia
– -$290K -1,475 Closed
MF
473
Magnetar Financial
Illinois
– -$285K -1,448 Closed
QCM
474
QRG Capital Management
Illinois
– -$269K -1,366 Closed
PTC
475
Petrus Trust Company
Texas
– -$259K -1,315 Closed
16 17 18
19
20

AMG Hedge Fund Activity: Q3 2025 in Review

450 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in Affiliated Managers Group (AMG) for Q3 2025, worth a combined $6.32B — up 20% from $5.28B a quarter earlier.

Buyers outnumbered sellers: 59 funds opened new AMG positions and 36 closed out — a net gain of 23 holders — while 141 added to existing stakes and 163 trimmed.

The largest buyer was Alyeska Investment Group, opening a new position worth an estimated $65M. The largest seller was Millennium Management, cutting an estimated $122M.

  • 450 institutional investors held Affiliated Managers Group (AMG) as of Q3 2025, up from 433 in Q2 2025.
  • Funds reported $6.32B of Affiliated Managers Group stock for Q3 2025, up 20% quarter-over-quarter.
  • 59 funds opened new Affiliated Managers Group positions in Q3 2025 and 36 closed out, a net change of +23 holders.
  • The largest Affiliated Managers Group buyer in Q3 2025 was Alyeska Investment Group, an estimated $65M added.
  • The largest Affiliated Managers Group seller in Q3 2025 was Millennium Management, an estimated $122M sold.

Based on aggregated 13F filings for Q3 2025.