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Affiliated Managers Group, Inc. (AMG) stock

AMGNYSEInvestment AdviceFiscal year ends December 31Also trades as MGR, MGRB, MGRD, MGRE
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 7, 2026Score 15/307% below fair value
$381.57−17.45 (-4.37%)

Close on Oct 30, 2026Market cap $10.26BP/E 13.5Yield 0.01%

Price history

Affiliated Managers share prices for every month, newest first. Adjusted for stock splits, not for dividends.

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Close, Oct 30, 2026
$381.57
-4.37% on the day
52-week range
$236.32 – $400.13
-4.6% from the high
Change over 52 weeks
+61.2%
From $236.68 on Oct 30, 2025
Average volume
279,010
Shares a day, last 90 sessions
MonthOpenHighLowCloseChangeVolume
Oct 2026$365.19$400.13$364.02$381.57+4.37%5,890,007
Sep 2026$363.73$379.06$339.87$365.61-0.70%6,398,427
Aug 2026$368.70$392.92$350.76$368.19+0.40%5,326,811
Jul 2026$338.50$382.75$328.11$366.73+8.37%5,805,187
Jun 2026$302.39$363.89$299.81$338.40+11.74%7,870,328
May 2026$301.76$317.81$285.96$302.85+2.78%6,273,230
Apr 2026$280.67$308.06$254.44$294.67+6.49%7,407,211
Mar 2026$301.33$315.89$267.23$276.70-9.63%8,195,370
Feb 2026$313.38$334.78$279.02$306.18-2.21%9,440,703
Jan 2026$288.75$334.00$287.33$313.09+8.61%7,695,874
Dec 2025$266.41$299.69$264.01$288.28+7.24%9,605,861
Nov 2025$247.90$271.48$242.77$268.83+12.97%6,183,994
Oct 2025$236.85$247.66$230.10$237.96-0.20%4,850,022
Sep 2025$230.61$250.15$224.59$238.43+6.05%4,517,622
Aug 2025$207.57$229.40$200.00$224.82+7.12%3,502,820
Jul 2025$195.68$220.00$194.76$209.87+6.66%4,927,272
Jun 2025$175.56$199.49$172.54$196.77+11.80%4,049,396
May 2025$164.74$188.62$163.71$176.00+6.26%6,036,828
Apr 2025$168.72$173.47$139.22$165.63-1.43%4,740,149
Mar 2025$171.56$174.76$151.63$168.03-1.65%5,946,560
Feb 2025$183.54$186.22$163.45$170.85-9.09%4,215,442
Jan 2025$185.90$191.13$173.64$187.94+1.63%3,742,446
Dec 2024$187.03$190.37$178.32$184.92-1.40%4,518,150
Nov 2024$195.11$196.89$173.58$187.54-3.28%4,175,764
Oct 2024$177.19$199.52$173.98$193.90+9.06%3,546,469
Sep 2024$171.86$180.96$159.88$177.80+2.28%3,936,067
Aug 2024$185.70$185.71$158.59$173.83-6.35%3,967,550
Jul 2024$156.49$189.81$152.37$185.62+18.81%6,548,135
Jun 2024$163.25$163.25$147.13$156.23-3.92%6,894,584
May 2024$155.73$163.21$154.29$162.60+4.16%6,544,553
Apr 2024$167.30$169.65$156.00$156.10-6.79%5,471,341
Mar 2024$156.74$167.90$155.20$167.47+7.14%4,345,043
Feb 2024$149.37$159.65$147.70$156.31+5.02%4,903,964
Jan 2024$149.92$155.51$145.36$148.84-1.70%4,364,539
Dec 2023$135.27$156.38$135.22$151.42+11.71%4,965,070
Nov 2023$123.55$138.07$121.56$135.55+10.42%6,408,944
Oct 2023$130.33$132.01$120.22$122.76-5.82%4,751,868
Sep 2023$135.36$137.00$129.08$130.34-2.74%5,073,306
Aug 2023$138.45$142.25$129.51$134.01-3.34%5,557,131
Jul 2023$149.90$163.93$136.86$138.64-7.51%5,733,268
Jun 2023$139.84$152.01$139.27$149.89+7.76%4,782,614
May 2023$142.87$146.62$136.00$139.09-3.66%4,991,841
Apr 2023$141.52$144.77$135.48$144.38+1.38%4,123,915
Mar 2023$158.62$161.61$132.40$142.42-10.66%8,257,423
Feb 2023$172.23$180.63$157.18$159.41-7.72%5,724,915
Jan 2023$160.94$172.74$158.79$172.74+9.03%5,602,238
Dec 2022$160.27$163.36$149.89$158.43-1.24%5,897,799
Nov 2022$125.96$161.03$120.25$160.42+29.20%6,799,054
Oct 2022$113.65$127.32$108.12$124.16+11.01%6,001,514
Sep 2022$126.01$134.92$111.20$111.85-12.18%5,773,528
Aug 2022$128.78$142.03$126.10$127.36+0.78%5,870,961
Jul 2022$115.52$128.24$109.57$126.38+8.39%4,247,125
Jun 2022$134.82$138.73$112.38$116.60-12.74%6,065,626
May 2022$122.96$136.31$116.12$133.62+6.41%5,129,247
Apr 2022$143.79$146.85$125.20$125.57-10.91%5,326,189
Mar 2022$136.98$148.13$121.40$140.95+1.87%6,258,235
Feb 2022$147.17$150.96$128.39$138.36-5.37%5,137,595
Jan 2022$165.93$171.39$133.48$146.21-11.12%5,240,331
Dec 2021$174.00$176.75$151.33$164.51-3.30%5,727,021
Nov 2021$171.50$191.62$166.74$170.13+1.34%4,274,897

Seasonality

AMG return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.

YearJanFebMarAprMayJunJulAugSepOctNovDec
Average1.9%1.2%-3.2%0.7%-2.1%3.2%4.3%-1.8%-0.9%1.7%8.7%2.2%
Months up6 of 104 of 104 of 106 of 105 of 106 of 107 of 104 of 104 of 105 of 107 of 94 of 9
20268.6%-2.2%-9.6%6.5%2.8%11.7%8.4%0.4%-0.7%4.4%
20251.6%-9.1%-1.7%-1.4%6.3%11.8%6.7%7.1%6.1%-0.2%13.0%7.2%
2024-1.7%5.0%7.1%-6.8%4.2%-3.9%18.8%-6.3%2.3%9.1%-3.3%-1.4%
20239.0%-7.7%-10.7%1.4%-3.7%7.8%-7.5%-3.3%-2.7%-5.8%10.4%11.7%
2022-11.1%-5.4%1.9%-10.9%6.4%-12.7%8.4%0.8%-12.2%11.0%29.2%-1.2%
20218.3%27.0%6.5%8.1%1.8%-6.0%2.7%7.4%-11.2%11.1%1.3%-3.3%
2020-5.8%-5.4%-21.4%18.3%-4.8%11.9%-7.7%-0.2%-0.4%10.2%15.6%16.7%
20197.7%4.8%-2.3%3.6%-24.2%9.9%-6.9%-10.3%8.8%-4.2%7.3%-0.7%
2018-2.7%-5.0%0.1%-13.0%-3.2%-6.6%7.6%-8.5%-6.4%-16.9%-2.0%-12.3%
20174.9%10.4%-2.4%1.0%-7.0%7.8%12.0%-4.8%7.4%-1.8%6.6%3.3%