Boston Partners
AMG icon

Boston Partners’s Affiliated Managers Group AMG Stock Holding History

Boston Partners’s Portfolio AMG Stock Details AMG Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$339M Buy
1,001,967
+30,720
+3% +$9.53M 0.3% 110
2026
Q1 		$269M Sell
971,247
-165,463
-15% -$49.9M 0.28% 126
2025
Q4 		$328M Sell
1,136,710
-20,634
-2% -$5.33M 0.34% 97
2025
Q3 		$276M Buy
1,157,344
+24,217
+2% +$5.34M 0.28% 121
2025
Q2 		$223M Sell
1,133,127
-21,664
-2% -$3.76M 0.25% 141
2025
Q1 		$194M Sell
1,154,791
-29,339
-2% -$5.11M 0.23% 153
2024
Q4 		$219M Buy
1,184,130
+373,696
+46% +$69.7M 0.27% 146
2024
Q3 		$144M Buy
810,434
+89,646
+12% +$15.2M 0.17% 188
2024
Q2 		$113M Buy
+720,788
New +$115M 0.14% 200
2018
Q4 		– Sell
-17,868
Closed -$2.44M – 706
2018
Q3 		$2.44M Sell
17,868
-500
-3% -$73.8K ﹤0.01% 579
2018
Q2 		$2.73M Sell
18,368
-10,587
-37% -$1.74M ﹤0.01% 603
2018
Q1 		$5.49M Sell
28,955
-1,566
-5% -$305K 0.01% 461
2017
Q4 		$6.26M Hold
30,521
– – 0.01% 448
2017
Q3 		$5.79M Hold
30,521
– – 0.01% 477
2017
Q2 		$5.06M Hold
30,521
– – 0.01% 470
2017
Q1 		$5M Sell
30,521
-5,044
-14% -$798K 0.01% 498
2016
Q4 		$5.17M Buy
35,565
+10,601
+42% +$1.54M 0.01% 496
2016
Q3 		$3.61M Hold
24,964
– – 0.01% 551
2016
Q2 		$3.51M Buy
+24,964
New +$4.09M 0.01% 548
2013
Q4 		– Sell
-20,870
Closed -$3.81M – 709
2013
Q3 		$3.81M Sell
20,870
-15,061
-42% -$2.67M 0.01% 529
2013
Q2 		$5.89M Buy
+35,931
New +$5.68M 0.02% 426

Other funds holding AMG

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
AI
Ariel Investments Chicago, Illinois $10B AUM 42.59% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $36.7B AUM 74.15% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Boston Partners's AMG Position: Q2 2026 in Review

Boston Partners increased its Affiliated Managers Group (AMG) stake by 3.2% in Q2 2026, buying an estimated $9.53M and bringing the position to 1,001,967 shares worth $339M. The position accounts for 0.3% of the portfolio, ranked #110.

Boston Partners first reported a position in AMG in Q2 2013 and has held it in 21 quarters since. 564 funds tracked by Wall St. Rank hold AMG as of Q2 2026.

  • Boston Partners held 1,001,967 shares of Affiliated Managers Group worth $339M as of Q2 2026.
  • Boston Partners bought 30,720 Affiliated Managers Group shares in Q2 2026, an estimated $9.53M.
  • Affiliated Managers Group made up 0.3% of Boston Partners's portfolio in Q2 2026, its #110 holding.
  • Boston Partners first reported a position in Affiliated Managers Group in Q2 2013 and has held it in 21 quarters since.
  • 564 funds tracked by Wall St. Rank held Affiliated Managers Group as of Q2 2026.

Based on Boston Partners's 13F filing for Q2 2026, filed 4 Aug 2026.