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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 week, 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
Week ofOpenHighLowCloseChangeVolume
Oct 26, 2026$387.04$400.13$378.08$381.57-0.48%1,114,740
Oct 19, 2026$384.07$399.00$381.89$383.42-0.09%1,247,800
Oct 12, 2026$389.12$395.00$369.71$383.76-0.90%1,444,726
Oct 5, 2026$373.57$393.42$370.44$387.26+4.26%1,687,132
Sep 28, 2026$371.42$379.86$356.18$371.43-0.60%1,526,524
Sep 21, 2026$359.65$379.06$355.27$373.69+5.03%1,397,063
Sep 14, 2026$353.41$358.39$339.87$355.80+0.05%1,609,270
Sep 8, 2026$368.91$370.00$350.99$355.61-3.95%936,454
Aug 31, 2026$370.85$375.61$354.73$370.22-0.18%1,632,020
Aug 24, 2026$355.67$376.75$351.77$370.87+4.12%1,066,177
Aug 17, 2026$371.89$375.99$350.76$356.21-4.85%1,528,962
Aug 10, 2026$368.11$374.90$358.25$374.37+1.26%1,287,074
Aug 3, 2026$368.70$392.92$367.91$369.70+0.81%1,137,303
Jul 27, 2026$361.66$375.41$355.00$366.73+2.36%1,254,334
Jul 20, 2026$373.24$377.16$328.11$358.29-3.12%1,806,539
Jul 13, 2026$365.58$382.75$357.86$369.83+0.93%1,007,103
Jul 6, 2026$345.34$369.94$344.44$366.41+6.33%1,229,191
Jun 29, 2026$342.05$349.21$334.20$344.60+0.77%1,548,207
Jun 22, 2026$354.92$358.99$337.35$341.98-3.09%1,484,055
Jun 15, 2026$359.30$363.89$351.16$352.90-0.49%1,332,723
Jun 8, 2026$337.09$355.55$333.01$354.62+5.29%1,906,317
Jun 1, 2026$302.39$338.07$299.81$336.81+11.21%2,107,046
May 26, 2026$304.08$313.35$301.63$302.85+0.29%1,476,642
May 18, 2026$293.97$306.47$291.25$301.96+2.74%1,420,342
May 11, 2026$302.60$307.78$293.18$293.91-2.94%1,228,623
May 4, 2026$292.07$310.97$290.90$302.80+4.03%1,586,390
Apr 27, 2026$287.18$317.81$285.00$291.07+1.26%1,931,209
Apr 20, 2026$294.33$306.73$270.35$287.44-2.56%1,638,864
Apr 13, 2026$281.44$308.06$281.44$294.98+3.37%1,831,781
Apr 6, 2026$265.01$291.32$264.01$285.36+7.48%1,922,501
Mar 30, 2026$272.19$283.21$254.44$265.51-1.29%1,193,434
Mar 23, 2026$285.44$286.76$267.98$268.98-3.30%1,826,300
Mar 16, 2026$276.47$285.30$271.48$278.17+2.29%2,103,214
Mar 9, 2026$280.39$287.61$267.23$271.95-4.84%1,928,488
Mar 2, 2026$301.33$315.89$280.96$285.77-6.67%1,788,023
Feb 23, 2026$286.90$318.90$279.02$306.18+6.43%2,057,801
Feb 17, 2026$331.95$334.78$285.63$287.69-12.77%2,203,283
Feb 9, 2026$304.35$330.38$289.80$329.79+7.95%3,202,150
Feb 2, 2026$313.38$319.85$294.15$305.50-2.42%1,977,469
Jan 26, 2026$321.27$322.43$304.92$313.09-2.10%2,095,787
Jan 20, 2026$323.48$334.00$317.10$319.82-1.93%1,479,549
Jan 12, 2026$305.50$327.53$303.76$326.12+5.87%1,575,254
Jan 5, 2026$288.93$311.51$288.93$308.03+6.64%2,029,702
Dec 29, 2025$294.98$298.04$286.32$288.85-2.44%1,878,807
Dec 22, 2025$280.50$299.69$279.86$296.07+6.08%1,351,677
Dec 15, 2025$281.89$281.89$269.51$279.09+0.61%2,899,696
Dec 8, 2025$273.51$283.22$267.26$277.41+1.54%2,885,968
Dec 1, 2025$266.41$276.40$264.01$273.19+1.62%1,105,295
Nov 24, 2025$257.08$271.48$256.79$268.83+4.66%945,666
Nov 17, 2025$257.74$261.27$246.11$256.87-0.56%1,487,848
Nov 10, 2025$262.00$265.59$254.90$258.31-0.37%1,689,483
Nov 3, 2025$247.90$261.32$242.77$259.26+8.95%2,060,997

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%