AFFILIATED MANAGERS GROUP

Ticker: AMG CUSIP: 008252108 Class: COM

BLAIR WILLIAM & CO/IL's Holding History (CIK: 0000902367)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 10,724 Value ($000) $3,092 Avg Close $258.45 Range $230.09 - $299.69

Q3 2025

Shares 10,736 Value ($000) $2,560 Avg Close $220.39 Range $194.74 - $250.14

Q2 2025

Shares 10,885 Value ($000) $2,142 Avg Close $173.47 Range $139.20 - $199.47

Q1 2025

Shares 12,249 Value ($000) $2,058 Avg Close $174.30 Range $151.61 - $191.09

Q4 2024

Shares 12,449 Value ($000) $2,302 Avg Close $186.57 Range $173.54 - $199.47

Q3 2024

Shares 12,493 Value ($000) $2,221 Avg Close $169.81 Range $152.32 - $189.75

Q2 2024

Shares 12,905 Value ($000) $2,016 Avg Close $159.16 Range $147.08 - $169.59

Q1 2024

Shares 12,924 Value ($000) $2,164 Avg Close $155.40 Range $145.30 - $167.84

Q4 2023

Shares 12,855 Value ($000) $1,947 Avg Close $134.30 Range $120.16 - $156.31

Q3 2023

Shares 13,180 Value ($000) $1,718 Avg Close $139.81 Range $129.01 - $163.83

Q2 2023

Shares 13,251 Value ($000) $1,986 Avg Close $143.06 Range $135.39 - $151.92

Q1 2023

Shares 13,897 Value ($000) $1,979 Avg Close $157.88 Range $132.31 - $180.50

Q4 2022

Shares 13,906 Value ($000) $2,203 Avg Close $141.36 Range $108.04 - $163.24

Q3 2022

Shares 14,436 Value ($000) $1,615 Avg Close $125.39 Range $109.48 - $141.92

Q2 2022

Shares 14,436 Value ($000) $1,683 Avg Close $128.58 Range $112.28 - $146.71

Q1 2022

Shares 14,730 Value ($000) $2,076 Avg Close $143.53 Range $121.29 - $171.22

Q4 2021

Shares 15,005 Value ($000) $2,468 Avg Close $167.52 Range $146.96 - $191.42

Q3 2021

Shares 15,003 Value ($000) $2,267 Avg Close $163.56 Range $146.02 - $180.77

Q2 2021

Shares 15,030 Value ($000) $2,318 Avg Close $159.33 Range $147.97 - $176.63

Q1 2021

Shares 19,155 Value ($000) $2,855 Avg Close $130.58 Range $98.76 - $153.37

Q4 2020

Shares 19,193 Value ($000) $1,952 Avg Close $86.25 Range $66.34 - $103.21

Q3 2020

Shares 19,940 Value ($000) $1,363 Avg Close $69.80 Range $62.10 - $75.77

Q2 2020

Shares 81,046 Value ($000) $6,043 Avg Close $67.48 Range $53.23 - $82.32

Q1 2020

Shares 82,063 Value ($000) $4,853 Avg Close $74.64 Range $44.30 - $88.80

Q4 2019

Shares 83,577 Value ($000) $7,082 Avg Close $81.44 Range $70.43 - $87.94

Q3 2019

Shares 101,461 Value ($000) $8,457 Avg Close $82.65 Range $73.22 - $92.84

Q2 2019

Shares 106,833 Value ($000) $9,844 Avg Close $96.65 Range $82.01 - $113.84

Q1 2019

Shares 141,966 Value ($000) $15,206 Avg Close $104.33 Range $93.26 - $110.96

Q4 2018

Shares 151,399 Value ($000) $14,752 Avg Close $110.59 Range $86.74 - $136.36

Q3 2018

Shares 295,380 Value ($000) $40,384 Avg Close $144.30 Range $133.37 - $159.64

Q2 2018

Shares 341,985 Value ($000) $50,843 Avg Close $160.74 Range $145.08 - $182.71

Q1 2018

Shares 449,597 Value ($000) $85,235 Avg Close $189.64 Range $169.45 - $211.08

Q4 2017

Shares 585,462 Value ($000) $120,166 Avg Close $188.42 Range $173.99 - $202.01

Q3 2017

Shares 621,820 Value ($000) $118,040 Avg Close $172.79 Range $161.15 - $186.54

Q2 2017

Shares 649,234 Value ($000) $107,682 Avg Close $154.87 Range $144.44 - $164.19

Q1 2017

Shares 664,609 Value ($000) $109,972 Avg Close $153.31 Range $135.07 - $166.39

Q4 2016

Shares 663,315 Value ($000) $96,380 Avg Close $140.58 Range $126.32 - $157.66

Q3 2016

Shares 727,394 Value ($000) $105,254 Avg Close $138.59 Range $126.84 - $143.96

Q2 2016

Shares 738,373 Value ($000) $103,941 Avg Close $158.47 Range $126.98 - $174.12

Q1 2016

Shares 817,306 Value ($000) $132,730 Avg Close $135.06 Range $112.27 - $159.84

Q4 2015

Shares 810,260 Value ($000) $129,447 Avg Close $166.43 Range $137.16 - $184.66

Q3 2015

Shares 893,817 Value ($000) $152,833 Avg Close $190.37 Range $159.30 - $214.73

Q2 2015

Shares 2,412,272 Value ($000) $527,322 Avg Close $215.27 Range $205.22 - $223.28

Q1 2015

Shares 2,536,790 Value ($000) $544,851 Avg Close $204.27 Range $185.26 - $214.40

Q4 2014

Shares 2,386,281 Value ($000) $506,463 Avg Close $192.32 Range $168.87 - $209.59

Q3 2014

Shares 2,107,673 Value ($000) $422,293 Avg Close $197.54 Range $186.21 - $207.58

Q2 2014

Shares 2,134,761 Value ($000) $438,479 Avg Close $187.17 Range $171.21 - $199.62

Q1 2014

Shares 2,212,414 Value ($000) $442,593 Avg Close $190.16 Range $175.09 - $212.40

Q4 2013

Shares 2,014,337 Value ($000) $436,869 Avg Close $193.15 Range $175.92 - $210.55

Q3 2013

Shares 2,375,285 Value ($000) $433,822 Avg Close $171.93 Range $151.62 - $183.39

Q2 2013

Shares 2,184,571 Value ($000) $358,138 Avg Close $153.14 Range $138.12 - $166.12

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	10,724	$3,092	$258.45	$230.09 - $299.69
Q3 2025	10,736	$2,560	$220.39	$194.74 - $250.14
Q2 2025	10,885	$2,142	$173.47	$139.20 - $199.47
Q1 2025	12,249	$2,058	$174.30	$151.61 - $191.09
Q4 2024	12,449	$2,302	$186.57	$173.54 - $199.47
Q3 2024	12,493	$2,221	$169.81	$152.32 - $189.75
Q2 2024	12,905	$2,016	$159.16	$147.08 - $169.59
Q1 2024	12,924	$2,164	$155.40	$145.30 - $167.84
Q4 2023	12,855	$1,947	$134.30	$120.16 - $156.31
Q3 2023	13,180	$1,718	$139.81	$129.01 - $163.83
Q2 2023	13,251	$1,986	$143.06	$135.39 - $151.92
Q1 2023	13,897	$1,979	$157.88	$132.31 - $180.50
Q4 2022	13,906	$2,203	$141.36	$108.04 - $163.24
Q3 2022	14,436	$1,615	$125.39	$109.48 - $141.92
Q2 2022	14,436	$1,683	$128.58	$112.28 - $146.71
Q1 2022	14,730	$2,076	$143.53	$121.29 - $171.22
Q4 2021	15,005	$2,468	$167.52	$146.96 - $191.42
Q3 2021	15,003	$2,267	$163.56	$146.02 - $180.77
Q2 2021	15,030	$2,318	$159.33	$147.97 - $176.63
Q1 2021	19,155	$2,855	$130.58	$98.76 - $153.37
Q4 2020	19,193	$1,952	$86.25	$66.34 - $103.21
Q3 2020	19,940	$1,363	$69.80	$62.10 - $75.77
Q2 2020	81,046	$6,043	$67.48	$53.23 - $82.32
Q1 2020	82,063	$4,853	$74.64	$44.30 - $88.80
Q4 2019	83,577	$7,082	$81.44	$70.43 - $87.94
Q3 2019	101,461	$8,457	$82.65	$73.22 - $92.84
Q2 2019	106,833	$9,844	$96.65	$82.01 - $113.84
Q1 2019	141,966	$15,206	$104.33	$93.26 - $110.96
Q4 2018	151,399	$14,752	$110.59	$86.74 - $136.36
Q3 2018	295,380	$40,384	$144.30	$133.37 - $159.64
Q2 2018	341,985	$50,843	$160.74	$145.08 - $182.71
Q1 2018	449,597	$85,235	$189.64	$169.45 - $211.08
Q4 2017	585,462	$120,166	$188.42	$173.99 - $202.01
Q3 2017	621,820	$118,040	$172.79	$161.15 - $186.54
Q2 2017	649,234	$107,682	$154.87	$144.44 - $164.19
Q1 2017	664,609	$109,972	$153.31	$135.07 - $166.39
Q4 2016	663,315	$96,380	$140.58	$126.32 - $157.66
Q3 2016	727,394	$105,254	$138.59	$126.84 - $143.96
Q2 2016	738,373	$103,941	$158.47	$126.98 - $174.12
Q1 2016	817,306	$132,730	$135.06	$112.27 - $159.84
Q4 2015	810,260	$129,447	$166.43	$137.16 - $184.66
Q3 2015	893,817	$152,833	$190.37	$159.30 - $214.73
Q2 2015	2,412,272	$527,322	$215.27	$205.22 - $223.28
Q1 2015	2,536,790	$544,851	$204.27	$185.26 - $214.40
Q4 2014	2,386,281	$506,463	$192.32	$168.87 - $209.59
Q3 2014	2,107,673	$422,293	$197.54	$186.21 - $207.58
Q2 2014	2,134,761	$438,479	$187.17	$171.21 - $199.62
Q1 2014	2,212,414	$442,593	$190.16	$175.09 - $212.40
Q4 2013	2,014,337	$436,869	$193.15	$175.92 - $210.55
Q3 2013	2,375,285	$433,822	$171.93	$151.62 - $183.39
Q2 2013	2,184,571	$358,138	$153.14	$138.12 - $166.12