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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
GF
251
Gabelli Funds
New York
$540K -$26.4K -120 -5%
SC
252
Schubert & Co
Texas
$525K +$1.32K +6 +0.3%
Squarepoint
253
Squarepoint
New York
$521K -$10.1K -46 -2%
SAM
254
Securian Asset Management
Minnesota
$505K -$22K -100 -5%
BHCM
255
Brevan Howard Capital Management
Jersey
$478K -$1.56M -7,072 -78%
HKAM
256
Horizon Kinetics Asset Management
New York
$472K -$23.6K -107 -5%
SDIC
257
South Dakota Investment Council
South Dakota
$450K -$66.1K -300 -14%
Susquehanna International Group
258
Susquehanna International Group
Pennsylvania
$448K -$445K -2,017 -52%
TRCT
259
Tower Research Capital (TRC)
New York
$447K +$286K +1,298 +225%
HW
260
Hancock Whitney
Mississippi
$442K -$2.87K -13 -0.7%
GIM
261
Glenmede Investment Management
Pennsylvania
$427K +$14.8K +67 +4%
GT
262
Greenleaf Trust
Michigan
$423K -$220 -1 -0.1%
TI
263
Tidal Investments
Wisconsin
$413K +$39.9K +181 +12%
PA
264
Procyon Advisors
Connecticut
$393K +$11K +50 +3%
DFCM
265
Dark Forest Capital Management
Puerto Rico
$391K +$361K +1,638 New
CFO
266
Callan Family Office
Pennsylvania
$386K -$20.5K -93 -5%
JAM
267
Jupiter Asset Management
United Kingdom
$386K +$357K +1,619 New
QC
268
Quadrature Capital
United Kingdom
$379K -$362K -1,642 -51%
CTC
269
Cetera Trust Company
Minnesota
$377K – – –
AFG
270
Allegheny Financial Group
Pennsylvania
$360K -$8.38K -38 -2%
URS
271
Utah Retirement Systems
Utah
$352K – – –
HSBC Holdings
272
HSBC Holdings
United Kingdom
$350K +$7.05K +32 +2%
CIP
273
Cornerstone Investment Partners
Georgia
$344K -$127K -578 -29%
PAS
274
Point72 Asia (Singapore)
Singapore
$338K -$901K -4,087 -74%
FFM
275
Forum Financial Management
Illinois
$330K +$220 +1 +0.1%
9 10
11
12 13

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.