William Blair & Company’s Affiliated Managers Group AMG Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $3.29M | Buy |
11,883
+1,159
| +11% | +$349K | 0.01% | 603 |
|
|
2025
Q4 | $3.09M | Sell |
10,724
-12
| -0.1% | -$3.1K | 0.01% | 629 |
|
|
2025
Q3 | $2.56M | Sell |
10,736
-149
| -1% | -$32.8K | 0.01% | 671 |
|
|
2025
Q2 | $2.14M | Sell |
10,885
-1,364
| -11% | -$237K | 0.01% | 699 |
|
|
2025
Q1 | $2.06M | Sell |
12,249
-200
| -2% | -$34.9K | 0.01% | 706 |
|
|
2024
Q4 | $2.3M | Sell |
12,449
-44
| -0.4% | -$8.21K | 0.01% | 679 |
|
|
2024
Q3 | $2.22M | Sell |
12,493
-412
| -3% | -$70K | 0.01% | 679 |
|
|
2024
Q2 | $2.02M | Sell |
12,905
-19
| -0.1% | -$3.02K | 0.01% | 687 |
|
|
2024
Q1 | $2.16M | Buy |
12,924
+69
| +0.5% | +$10.7K | 0.01% | 659 |
|
|
2023
Q4 | $1.95M | Sell |
12,855
-325
| -2% | -$43.7K | 0.01% | 673 |
|
|
2023
Q3 | $1.72M | Sell |
13,180
-71
| -0.5% | -$9.93K | 0.01% | 695 |
|
|
2023
Q2 | $1.99M | Sell |
13,251
-646
| -5% | -$92.5K | 0.01% | 672 |
|
|
2023
Q1 | $1.98M | Sell |
13,897
-9
| -0.1% | -$1.42K | 0.01% | 659 |
|
|
2022
Q4 | $2.2M | Sell |
13,906
-530
| -4% | -$75K | 0.01% | 607 |
|
|
2022
Q3 | $1.61M | Hold |
14,436
| – | – | 0.01% | 668 |
|
|
2022
Q2 | $1.68M | Sell |
14,436
-294
| -2% | -$37.8K | 0.01% | 684 |
|
|
2022
Q1 | $2.08M | Sell |
14,730
-275
| -2% | -$39.5K | 0.01% | 688 |
|
|
2021
Q4 | $2.47M | Buy |
15,005
+2
| +0% | +$335 | 0.01% | 667 |
|
|
2021
Q3 | $2.27M | Sell |
15,003
-27
| -0.2% | -$4.42K | 0.01% | 672 |
|
|
2021
Q2 | $2.32M | Sell |
15,030
-4,125
| -22% | -$658K | 0.01% | 668 |
|
|
2021
Q1 | $2.85M | Sell |
19,155
-38
| -0.2% | -$4.97K | 0.01% | 587 |
|
|
2020
Q4 | $1.95M | Sell |
19,193
-747
| -4% | -$64.5K | 0.01% | 658 |
|
|
2020
Q3 | $1.36M | Sell |
19,940
-61,106
| -75% | -$4.27M | 0.01% | 678 |
|
|
2020
Q2 | $6.04M | Sell |
81,046
-1,017
| -1% | -$68.7K | 0.03% | 346 |
|
|
2020
Q1 | $4.85M | Sell |
82,063
-1,514
| -2% | -$113K | 0.03% | 337 |
|
|
2019
Q4 | $7.08M | Sell |
83,577
-17,884
| -18% | -$1.47M | 0.04% | 319 |
|
|
2019
Q3 | $8.46M | Sell |
101,461
-5,372
| -5% | -$449K | 0.05% | 277 |
|
|
2019
Q2 | $9.84M | Sell |
106,833
-35,133
| -25% | -$3.45M | 0.06% | 259 |
|
|
2019
Q1 | $15.2M | Sell |
141,966
-9,433
| -6% | -$1M | 0.09% | 201 |
|
|
2018
Q4 | $14.8M | Sell |
151,399
-143,981
| -49% | -$16.3M | 0.11% | 182 |
|
|
2018
Q3 | $40.4M | Sell |
295,380
-46,605
| -14% | -$6.88M | 0.25% | 101 |
|
|
2018
Q2 | $50.8M | Sell |
341,985
-107,612
| -24% | -$17.7M | 0.35% | 73 |
|
|
2018
Q1 | $85.2M | Sell |
449,597
-135,865
| -23% | -$26.5M | 0.6% | 41 |
|
|
2017
Q4 | $120M | Sell |
585,462
-36,358
| -6% | -$7.05M | 0.82% | 25 |
|
|
2017
Q3 | $118M | Sell |
621,820
-27,414
| -4% | -$4.88M | 0.89% | 19 |
|
|
2017
Q2 | $108M | Sell |
649,234
-15,375
| -2% | -$2.45M | 0.81% | 20 |
|
|
2017
Q1 | $110M | Buy |
664,609
+1,294
| +0.2% | +$205K | 0.89% | 17 |
|
|
2016
Q4 | $96.4M | Sell |
663,315
-64,079
| -9% | -$9.3M | 0.86% | 20 |
|
|
2016
Q3 | $105M | Sell |
727,394
-10,979
| -1% | -$1.57M | 0.93% | 18 |
|
|
2016
Q2 | $104M | Sell |
738,373
-78,933
| -10% | -$12.9M | 0.97% | 15 |
|
|
2016
Q1 | $133M | Buy |
817,306
+7,046
| +0.9% | +$983K | 1.25% | 10 |
|
|
2015
Q4 | $129M | Sell |
810,260
-83,557
| -9% | -$14.4M | 1.22% | 10 |
|
|
2015
Q3 | $153M | Sell |
893,817
-1,518,455
| -63% | -$299M | 1.32% | 9 |
|
|
2015
Q2 | $527M | Sell |
2,412,272
-124,518
| -5% | -$27.7M | 0.79% | 1 |
|
|
2015
Q1 | $545M | Buy |
2,536,790
+150,509
| +6% | +$31.8M | 0.84% | 2 |
|
|
2014
Q4 | $506M | Buy |
2,386,281
+278,608
| +13% | +$55.3M | 0.82% | 2 |
|
|
2014
Q3 | $422M | Sell |
2,107,673
-27,088
| -1% | -$5.53M | 0.72% | 4 |
|
|
2014
Q2 | $438M | Sell |
2,134,761
-77,653
| -4% | -$15M | 0.72% | 5 |
|
|
2014
Q1 | $443M | Buy |
2,212,414
+198,077
| +10% | +$38.9M | 0.73% | 6 |
|
|
2013
Q4 | $437M | Sell |
2,014,337
-360,948
| -15% | -$72M | 0.72% | 9 |
|
|
2013
Q3 | $434M | Buy |
2,375,285
+190,714
| +9% | +$33.9M | 0.77% | 6 |
|
|
2013
Q2 | $358M | Buy |
+2,184,571
| New | +$346M | 0.71% | 7 |
|
Other funds holding AMG
VPM
VCM
AI
William Blair & Company's AMG Position: Q1 2026 in Review
William Blair & Company increased its Affiliated Managers Group (AMG) stake by 11% in Q1 2026, buying an estimated $349K and bringing the position to 11,883 shares worth $3.29M. The position accounts for 0.01% of the portfolio, ranked #603.
William Blair & Company first reported a position in AMG in Q2 2013 and has held it in 52 quarters since. The position peaked at $545M in Q1 2015. 544 funds tracked by Wall St. Rank hold AMG as of Q1 2026.
- William Blair & Company held 11,883 shares of Affiliated Managers Group worth $3.29M as of Q1 2026.
- William Blair & Company bought 1,159 Affiliated Managers Group shares in Q1 2026, an estimated $349K.
- Affiliated Managers Group made up 0.01% of William Blair & Company's portfolio in Q1 2026, its #603 holding.
- William Blair & Company first reported a position in Affiliated Managers Group in Q2 2013 and has held it in 52 quarters since.
- William Blair & Company's Affiliated Managers Group position peaked at $545M in Q1 2015.
- 544 funds tracked by Wall St. Rank held Affiliated Managers Group as of Q1 2026.
Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.