Weighted Average Number of Shares Outstanding, Basic of AFFILIATED MANAGERS GROUP, INC. from Q1 2010 to Q3 2025

Taxonomy & unit
us-gaap: shares
Description
Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.
Summary
AFFILIATED MANAGERS GROUP, INC. quarterly/annual Weighted Average Number of Shares Outstanding, Basic history and change rate from Q1 2010 to Q3 2025.
  • AFFILIATED MANAGERS GROUP, INC. Weighted Average Number of Shares Outstanding, Basic for the quarter ending 30 Sep 2025 was 28.4M shares, a 5.65% decline year-over-year.
  • AFFILIATED MANAGERS GROUP, INC. annual Weighted Average Number of Shares Outstanding, Basic for 2024 was 31.1M shares, a 11.4% decline from 2023.
  • AFFILIATED MANAGERS GROUP, INC. annual Weighted Average Number of Shares Outstanding, Basic for 2023 was 35.1M shares, a 8.83% decline from 2022.
  • AFFILIATED MANAGERS GROUP, INC. annual Weighted Average Number of Shares Outstanding, Basic for 2022 was 38.5M shares, a 7.23% decline from 2021.
Weighted Average Number of Shares Outstanding, Basic, Quarterly (shares)
Weighted Average Number of Shares Outstanding, Basic, YoY Quarterly Change (%)
Weighted Average Number of Shares Outstanding, Basic, Annual (shares)
Weighted Average Number of Shares Outstanding, Basic, YoY Annual Change (%)

AFFILIATED MANAGERS GROUP, INC. Quarterly Weighted Average Number of Shares Outstanding, Basic (shares)

Period TTM Value Value YoY Chg Change % Start Date End Date Report Filed
Q3 2025 28.4M -1.7M -5.65% 01 Jul 2025 30 Sep 2025 10-Q 06 Nov 2025
Q2 2025 28.5M -3M -9.52% 01 Apr 2025 30 Jun 2025 10-Q 07 Aug 2025
Q1 2025 29.2M -3.6M -11% 01 Jan 2025 31 Mar 2025 10-Q 08 May 2025
Q4 2024 31.1M -4M -11.4% 01 Oct 2024 31 Dec 2024 10-K 14 Feb 2025
Q3 2024 30.1M -4.8M -13.8% 01 Jul 2024 30 Sep 2024 10-Q 06 Nov 2025
Q2 2024 31.5M -4.4M -12.3% 01 Apr 2024 30 Jun 2024 10-Q 07 Aug 2025
Q1 2024 32.8M -3.1M -8.64% 01 Jan 2024 31 Mar 2024 10-Q 08 May 2025
Q4 2023 35.1M -3.4M -8.83% 01 Oct 2023 31 Dec 2023 10-K 14 Feb 2025
Q3 2023 34.9M -3.3M -8.64% 01 Jul 2023 30 Sep 2023 10-Q 07 Nov 2024
Q2 2023 35.9M -2.8M -7.24% 01 Apr 2023 30 Jun 2023 10-Q 02 Aug 2024
Q1 2023 35.9M -3.8M -9.57% 01 Jan 2023 31 Mar 2023 10-Q 07 May 2024
Q4 2022 38.5M -3M -7.23% 01 Oct 2022 31 Dec 2022 10-K 14 Feb 2025
Q3 2022 38.2M -2.9M -7.06% 01 Jul 2022 30 Sep 2022 10-Q 06 Nov 2023
Q2 2022 38.7M -2.9M -6.97% 01 Apr 2022 30 Jun 2022 10-Q 07 Aug 2023
Q1 2022 39.7M -2.9M -6.81% 01 Jan 2022 31 Mar 2022 10-Q 08 May 2023
Q4 2021 41.5M -5M -10.8% 01 Oct 2021 31 Dec 2021 10-K 16 Feb 2024
Q3 2021 41.1M -5.2M -11.2% 01 Jul 2021 30 Sep 2021 10-Q 07 Nov 2022
Q2 2021 41.6M -5.6M -11.9% 01 Apr 2021 30 Jun 2021 10-Q 04 Aug 2022
Q1 2021 42.6M -5.2M -10.9% 01 Jan 2021 31 Mar 2021 10-Q 06 May 2022
Q4 2020 46.5M -4M -7.92% 01 Oct 2020 31 Dec 2020 10-K 17 Feb 2023
Q3 2020 46.3M -4.1M -8.14% 01 Jul 2020 30 Sep 2020 10-Q 05 Nov 2021
Q2 2020 47.2M -3.8M -7.45% 01 Apr 2020 30 Jun 2020 10-Q 05 Aug 2021
Q1 2020 47.8M -4.1M -7.9% 01 Jan 2020 31 Mar 2020 10-Q 07 May 2021
Q4 2019 50.5M -3.1M -5.78% 01 Oct 2019 31 Dec 2019 10-K 18 Feb 2022
Q3 2019 50.4M -2.7M -5.09% 01 Jul 2019 30 Sep 2019 10-Q 30 Oct 2020
Q2 2019 51M -3M -5.56% 01 Apr 2019 30 Jun 2019 10-Q 31 Jul 2020
Q1 2019 51.9M -2.7M -4.95% 01 Jan 2019 31 Mar 2019 10-Q 04 May 2020
Q4 2018 53.6M -2.4M -4.29% 01 Oct 2018 31 Dec 2018 10-K 19 Feb 2021
Q3 2018 53.1M -2.7M -4.84% 01 Jul 2018 30 Sep 2018 10-Q 01 Nov 2019
Q2 2018 54M -2.3M -4.09% 01 Apr 2018 30 Jun 2018 10-Q 01 Aug 2019
Q1 2018 54.6M -2.1M -3.7% 01 Jan 2018 31 Mar 2018 10-Q 09 May 2019
Q4 2017 56M +1.8M +3.32% 01 Oct 2017 31 Dec 2017 10-K 28 Feb 2020
Q3 2017 55.8M +1.9M +3.53% 01 Jul 2017 30 Sep 2017 10-Q 01 Nov 2018
Q2 2017 56.3M +2.5M +4.65% 01 Apr 2017 30 Jun 2017 10-Q 02 Aug 2018
Q1 2017 56.7M +2.7M +5% 01 Jan 2017 31 Mar 2017 10-Q 04 May 2018
Q4 2016 54.2M -100K -0.18% 01 Oct 2016 31 Dec 2016 10-K 22 Feb 2019
Q3 2016 53.9M -300K -0.55% 01 Jul 2016 30 Sep 2016 10-Q 02 Nov 2017
Q2 2016 53.8M -800K -1.47% 01 Apr 2016 30 Jun 2016 10-Q 03 Aug 2017
Q1 2016 54M -800K -1.46% 01 Jan 2016 31 Mar 2016 10-Q 05 May 2017
Q4 2015 54.3M -700K -1.27% 01 Oct 2015 31 Dec 2015 10-K 23 Feb 2018
Q3 2015 54.2M -1.4M -2.52% 01 Jul 2015 30 Sep 2015 10-Q 07 Nov 2016
Q2 2015 54.6M -800K -1.44% 01 Apr 2015 30 Jun 2015 10-Q 05 Aug 2016
Q1 2015 54.8M +1.1M +2.05% 01 Jan 2015 31 Mar 2015 10-Q 10 May 2016
Q4 2014 55M +1.9M +3.58% 01 Oct 2014 31 Dec 2014 10-K 24 Feb 2017
Q3 2014 55.6M +2.4M +4.51% 01 Jul 2014 30 Sep 2014 10-Q 09 Nov 2015
Q2 2014 55.4M +2.3M +4.33% 01 Apr 2014 30 Jun 2014 10-Q 04 Aug 2015
Q1 2014 53.7M +1M +1.9% 01 Jan 2014 31 Mar 2014 10-Q 05 May 2015
Q4 2013 53.1M +1.4M +2.71% 01 Oct 2013 31 Dec 2013 10-K 25 Feb 2016
Q3 2013 53.2M +1.5M +2.9% 01 Jul 2013 30 Sep 2013 10-Q 06 Nov 2014
Q2 2013 53.1M +1.7M +3.31% 01 Apr 2013 30 Jun 2013 10-Q 06 Aug 2014
Q1 2013 52.7M +1.1M +2.13% 01 Jan 2013 31 Mar 2013 10-Q 06 May 2014
Q4 2012 51.7M -100K -0.19% 01 Oct 2012 31 Dec 2012 10-K 23 Feb 2015
Q3 2012 51.7M -200K -0.39% 01 Jul 2012 30 Sep 2012 10-Q 12 Nov 2013
Q2 2012 51.4M -700K -1.34% 01 Apr 2012 30 Jun 2012 10-Q 06 Aug 2013
Q1 2012 51.6M -200K -0.39% 01 Jan 2012 31 Mar 2012 10-Q 07 May 2013
Q4 2011 51.8M +4.4M +9.28% 01 Oct 2011 31 Dec 2011 10-K 27 Feb 2014
Q3 2011 51.9M +700K +1.37% 01 Jul 2011 30 Sep 2011 10-Q 06 Nov 2012
Q2 2011 52.1M +7.5M +16.8% 01 Apr 2011 30 Jun 2011 10-Q 08 Aug 2012
Q1 2011 51.8M +9.4M +22.2% 01 Jan 2011 31 Mar 2011 10-Q 08 May 2012
Q4 2010 47.4M 01 Oct 2010 31 Dec 2010 10-K 22 Feb 2013
Q3 2010 51.2M 01 Jul 2010 30 Sep 2010 10-Q 04 Nov 2011
Q2 2010 44.6M 01 Apr 2010 30 Jun 2010 10-Q 09 Aug 2011
Q1 2010 42.4M 01 Jan 2010 31 Mar 2010 10-Q 10 May 2011

AFFILIATED MANAGERS GROUP, INC. Annual Weighted Average Number of Shares Outstanding, Basic (shares)

Period Value YoY Chg Change % Start Date End Date Report Filed
2024 31.1M -4M -11.4% 01 Jan 2024 31 Dec 2024 10-K 14 Feb 2025
2023 35.1M -3.4M -8.83% 01 Jan 2023 31 Dec 2023 10-K 14 Feb 2025
2022 38.5M -3M -7.23% 01 Jan 2022 31 Dec 2022 10-K 14 Feb 2025
2021 41.5M -5M -10.8% 01 Jan 2021 31 Dec 2021 10-K 16 Feb 2024
2020 46.5M -4M -7.92% 01 Jan 2020 31 Dec 2020 10-K 17 Feb 2023
2019 50.5M -3.1M -5.78% 01 Jan 2019 31 Dec 2019 10-K 18 Feb 2022
2018 53.6M -2.4M -4.29% 01 Jan 2018 31 Dec 2018 10-K 19 Feb 2021
2017 56M +1.8M +3.32% 01 Jan 2017 31 Dec 2017 10-K 28 Feb 2020
2016 54.2M -100K -0.18% 01 Jan 2016 31 Dec 2016 10-K 22 Feb 2019
2015 54.3M -700K -1.27% 01 Jan 2015 31 Dec 2015 10-K 23 Feb 2018
2014 55M +1.9M +3.58% 01 Jan 2014 31 Dec 2014 10-K 24 Feb 2017
2013 53.1M +1.4M +2.71% 01 Jan 2013 31 Dec 2013 10-K 25 Feb 2016
2012 51.7M -100K -0.19% 01 Jan 2012 31 Dec 2012 10-K 23 Feb 2015
2011 51.8M +4.4M +9.28% 01 Jan 2011 31 Dec 2011 10-K 27 Feb 2014
2010 47.4M 01 Jan 2010 31 Dec 2010 10-K 22 Feb 2013
* An asterisk sign (*) next to the value indicates that the value is likely invalid.