Weighted Average Number of Shares Outstanding, Basic of BIOGEN 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
Biogen Inc. quarterly/annual Weighted Average Number of Shares Outstanding, Basic history and change rate from Q1 2010 to Q3 2025.
  • Biogen Inc. Weighted Average Number of Shares Outstanding, Basic for the quarter ending 30 Sep 2025 was 147M shares, a 0.62% increase year-over-year.
  • Biogen Inc. annual Weighted Average Number of Shares Outstanding, Basic for 2024 was 146M shares, a 0.62% increase from 2023.
  • Biogen Inc. annual Weighted Average Number of Shares Outstanding, Basic for 2023 was 145M shares, a 0.41% decline from 2022.
  • Biogen Inc. annual Weighted Average Number of Shares Outstanding, Basic for 2022 was 145M shares, a 2.55% 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 (%)

BIOGEN 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 147M +900K +0.62% 01 Jul 2025 30 Sep 2025 10-Q 30 Oct 2025
Q2 2025 147M +900K +0.62% 01 Apr 2025 30 Jun 2025 10-Q 31 Jul 2025
Q1 2025 146M +900K +0.62% 01 Jan 2025 31 Mar 2025 10-Q 01 May 2025
Q4 2024 146M +900K +0.62% 01 Oct 2024 31 Dec 2024 10-K 12 Feb 2025
Q3 2024 146M +900K +0.62% 01 Jul 2024 30 Sep 2024 10-Q 30 Oct 2025
Q2 2024 146M +900K +0.62% 01 Apr 2024 30 Jun 2024 10-Q 31 Jul 2025
Q1 2024 145M +800K +0.55% 01 Jan 2024 31 Mar 2024 10-Q 01 May 2025
Q4 2023 145M -600K -0.41% 01 Oct 2023 31 Dec 2023 10-K 12 Feb 2025
Q3 2023 145M +400K +0.28% 01 Jul 2023 30 Sep 2023 10-Q 30 Oct 2024
Q2 2023 145M -1.2M -0.82% 01 Apr 2023 30 Jun 2023 10-Q 01 Aug 2024
Q1 2023 144M -2.7M -1.84% 01 Jan 2023 31 Mar 2023 10-Q 24 Apr 2024
Q4 2022 145M -3.8M -2.55% 01 Oct 2022 31 Dec 2022 10-K 12 Feb 2025
Q3 2022 144M -3.6M -2.43% 01 Jul 2022 30 Sep 2022 10-Q 08 Nov 2023
Q2 2022 146M -3.8M -2.54% 01 Apr 2022 30 Jun 2022 10-Q 25 Jul 2023
Q1 2022 147M -4.8M -3.16% 01 Jan 2022 31 Mar 2022 10-Q 25 Apr 2023
Q4 2021 149M -4.6M -2.99% 01 Oct 2021 31 Dec 2021 10-K 14 Feb 2024
Q3 2021 148M -8.9M -5.67% 01 Jul 2021 30 Sep 2021 10-Q 25 Oct 2022
Q2 2021 150M -10.9M -6.79% 01 Apr 2021 30 Jun 2021 10-Q 20 Jul 2022
Q1 2021 152M -20.9M -12.1% 01 Jan 2021 31 Mar 2021 10-Q 03 May 2022
Q4 2020 154M -24.1M -13.6% 01 Oct 2020 31 Dec 2020 10-K 03 Feb 2021
Q3 2020 157M -27.1M -14.7% 01 Jul 2020 30 Sep 2020 10-Q 20 Oct 2021
Q2 2020 161M -29.7M -15.6% 01 Apr 2020 30 Jun 2020 10-Q 22 Jul 2021
Q1 2020 173M -23.8M -12.1% 01 Jan 2020 31 Mar 2020 10-Q 22 Apr 2021
Q4 2019 178M -22M -11% 01 Oct 2019 31 Dec 2019 10-K 03 Feb 2021
Q3 2019 184M -17.4M -8.64% 01 Jul 2019 30 Sep 2019 10-K 03 Feb 2021
Q2 2019 190M -16.8M -8.11% 01 Apr 2019 30 Jun 2019 10-K 03 Feb 2021
Q1 2019 197M -14.8M -7% 01 Jan 2019 31 Mar 2019 10-K 03 Feb 2021
Q4 2018 200M -11.7M -5.53% 01 Oct 2018 31 Dec 2018 10-K 06 Feb 2020
Q3 2018 201M -10M -4.73% 01 Jul 2018 30 Sep 2018 10-K 06 Feb 2020
Q2 2018 207M -4.8M -2.27% 01 Apr 2018 30 Jun 2018 10-K 06 Feb 2020
Q1 2018 211M -4.2M -1.95% 01 Jan 2018 31 Mar 2018 10-K 06 Feb 2020
Q4 2017 212M -5.1M -2.36% 01 Oct 2017 31 Dec 2017 10-K 06 Feb 2019
Q3 2017 211M -7.5M -3.43% 01 Jul 2017 30 Sep 2017 10-K 06 Feb 2019
Q2 2017 212M -7.2M -3.29% 01 Apr 2017 30 Jun 2017 10-K 06 Feb 2019
Q1 2017 216M -3.3M -1.51% 01 Jan 2017 31 Mar 2017 10-K 06 Feb 2019
Q4 2016 217M -3.8M -1.72% 01 Oct 2016 31 Dec 2016 10-K 01 Feb 2018
Q3 2016 219M -13.3M -5.73% 01 Jul 2016 30 Sep 2016 10-K 01 Feb 2018
Q2 2016 219M -16.2M -6.89% 01 Apr 2016 30 Jun 2016 10-K 01 Feb 2018
Q1 2016 219M -16.1M -6.85% 01 Jan 2016 31 Mar 2016 10-K 01 Feb 2018
Q4 2015 220M -15.1M -6.41% 01 Oct 2015 31 Dec 2015 10-K 02 Feb 2017
Q3 2015 232M -4M -1.69% 01 Jul 2015 30 Sep 2015 10-K 02 Feb 2017
Q2 2015 235M -1.4M -0.59% 01 Apr 2015 30 Jun 2015 10-K 02 Feb 2017
Q1 2015 235M -1.8M -0.76% 01 Jan 2015 31 Mar 2015 10-K 02 Feb 2017
Q4 2014 236M -1.4M -0.59% 01 Oct 2014 31 Dec 2014 10-K 03 Feb 2016
Q3 2014 236M -870K -0.37% 01 Jul 2014 30 Sep 2014 10-K 03 Feb 2016
Q2 2014 237M -784K -0.33% 01 Apr 2014 30 Jun 2014 10-K 03 Feb 2016
Q1 2014 237M -37K -0.02% 01 Jan 2014 31 Mar 2014 10-K 03 Feb 2016
Q4 2013 237M -1.04M -0.44% 01 Oct 2013 31 Dec 2013 10-K 03 Feb 2016
Q3 2013 237M +596K +0.25% 01 Jul 2013 30 Sep 2013 10-Q 22 Oct 2014
Q2 2013 237M -1.5M -0.63% 01 Apr 2013 30 Jun 2013 10-Q 23 Jul 2014
Q1 2013 237M -2.92M -1.22% 01 Jan 2013 31 Mar 2013 10-Q 23 Apr 2014
Q4 2012 238M -4.46M -1.84% 01 Oct 2012 31 Dec 2012 10-K 04 Feb 2015
Q3 2012 236M -6.41M -2.64% 01 Jul 2012 30 Sep 2012 10-Q 28 Oct 2013
Q2 2012 239M -3.39M -1.4% 01 Apr 2012 30 Jun 2012 10-Q 25 Jul 2013
Q1 2012 240M -1.78M -0.74% 01 Jan 2012 31 Mar 2012 10-Q 25 Apr 2013
Q4 2011 242M -9.91M -3.93% 01 Oct 2011 31 Dec 2011 10-K 06 Feb 2014
Q3 2011 243M +3.02M +1.26% 01 Jul 2011 30 Sep 2011 10-Q 25 Oct 2012
Q2 2011 242M -17.6M -6.76% 01 Apr 2011 30 Jun 2011 10-Q 24 Jul 2012
Q1 2011 242M -28.4M -10.5% 01 Jan 2011 31 Mar 2011 10-Q 01 May 2012
Q4 2010 252M 01 Oct 2010 31 Dec 2010 10-K 05 Feb 2013
Q3 2010 240M 01 Jul 2010 30 Sep 2010 10-Q 28 Oct 2011
Q2 2010 260M 01 Apr 2010 30 Jun 2010 10-Q 26 Jul 2011
Q1 2010 270M 01 Jan 2010 31 Mar 2010 10-Q 21 Apr 2011

BIOGEN INC. Annual Weighted Average Number of Shares Outstanding, Basic (shares)

Period Value YoY Chg Change % Start Date End Date Report Filed
2024 146M +900K +0.62% 01 Jan 2024 31 Dec 2024 10-K 12 Feb 2025
2023 145M -600K -0.41% 01 Jan 2023 31 Dec 2023 10-K 12 Feb 2025
2022 145M -3.8M -2.55% 01 Jan 2022 31 Dec 2022 10-K 12 Feb 2025
2021 149M -11.8M -7.33% 01 Jan 2021 31 Dec 2021 10-K 14 Feb 2024
2020 161M -26.2M -14% 01 Jan 2020 31 Dec 2020 10-K 15 Feb 2023
2019 187M -17.8M -8.69% 01 Jan 2019 31 Dec 2019 10-K 03 Feb 2022
2018 205M -7.7M -3.62% 01 Jan 2018 31 Dec 2018 10-K 03 Feb 2021
2017 213M -5.8M -2.66% 01 Jan 2017 31 Dec 2017 10-K 06 Feb 2020
2016 218M -12.3M -5.33% 01 Jan 2016 31 Dec 2016 10-K 06 Feb 2019
2015 231M -5.7M -2.41% 01 Jan 2015 31 Dec 2015 10-K 01 Feb 2018
2014 236M -500K -0.21% 01 Jan 2014 31 Dec 2014 10-K 02 Feb 2017
2013 237M -1.04M -0.44% 01 Jan 2013 31 Dec 2013 10-K 03 Feb 2016
2012 238M -4.46M -1.84% 01 Jan 2012 31 Dec 2012 10-K 04 Feb 2015
2011 242M -9.91M -3.93% 01 Jan 2011 31 Dec 2011 10-K 06 Feb 2014
2010 252M 01 Jan 2010 31 Dec 2010 10-K 05 Feb 2013
* An asterisk sign (*) next to the value indicates that the value is likely invalid.