Entity Common Stock, Shares Outstanding of BIOGEN INC. from 05 Feb 2010 to 04 Feb 2026

Taxonomy & unit
dei: shares
Description
Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.
Summary
BIOGEN INC. quarterly Entity Common Stock, Shares Outstanding in shares history and change rate from 05 Feb 2010 to 04 Feb 2026.
  • BIOGEN INC. Entity Common Stock, Shares Outstanding for the quarter ending 04 Feb 2026 was 146,758,528, a 0.26% increase year-over-year.
Source SEC data
View on sec.gov
Entity Common Stock, Shares Outstanding, Quarterly (shares)
Entity Common Stock, Shares Outstanding, YoY Quarterly Change (%)

BIOGEN INC. Quarterly Entity Common Stock, Shares Outstanding (shares)

Period Value YoY Chg Change % Date Report Filed Fiscal Year Fiscal Period
Q4 2025 146,758,528 +383,591 +0.26% 04 Feb 2026 10-K 06 Feb 2026 2025 FY
Q3 2025 146,702,272 +982,932 +0.68% 29 Oct 2025 10-Q 30 Oct 2025 2025 Q3
Q2 2025 146,614,598 +952,956 +0.65% 29 Jul 2025 10-Q 31 Jul 2025 2025 Q2
Q1 2025 146,527,832 +930,937 +0.64% 30 Apr 2025 10-Q 01 May 2025 2025 Q1
Q4 2024 146,374,937 +1,014,139 +0.7% 11 Feb 2025 10-K 12 Feb 2025 2024 FY
Q3 2024 145,719,340 +821,228 +0.57% 29 Oct 2024 10-Q 30 Oct 2024 2024 Q3
Q2 2024 145,661,642 +838,307 +0.58% 31 Jul 2024 10-Q 01 Aug 2024 2024 Q2
Q1 2024 145,596,895 +854,590 +0.59% 23 Apr 2024 10-Q 24 Apr 2024 2024 Q1
Q4 2023 145,360,798 +875,152 +0.61% 12 Feb 2024 10-K 14 Feb 2024 2023 FY
Q3 2023 144,898,112 +896,708 +0.62% 07 Nov 2023 10-Q 08 Nov 2023 2023 Q3
Q2 2023 144,823,335 -289,712 -0.2% 24 Jul 2023 10-Q 25 Jul 2023 2023 Q2
Q1 2023 144,742,305 -1,709,708 -1.2% 24 Apr 2023 10-Q 25 Apr 2023 2023 Q1
Q4 2022 144,485,646 -2,477,147 -1.7% 14 Feb 2023 10-K 15 Feb 2023 2022 FY
Q3 2022 144,001,404 -2,891,308 -2% 24 Oct 2022 10-Q 25 Oct 2022 2022 Q3
Q2 2022 145,113,047 -3,920,396 -2.6% 19 Jul 2022 10-Q 20 Jul 2022 2022 Q1
Q1 2022 146,452,013 -4,102,737 -2.7% 02 May 2022 10-Q 03 May 2022 2022 Q1
Q4 2021 146,962,793 -5,372,938 -3.5% 02 Feb 2022 10-K 03 Feb 2022 2021 FY
Q3 2021 146,892,712 -6,988,885 -4.5% 19 Oct 2021 10-Q 20 Oct 2021 2021 Q3
Q2 2021 149,033,443 -9,280,028 -5.9% 21 Jul 2021 10-Q 22 Jul 2021 2021 Q2
Q1 2021 150,554,750 -12,632,736 -7.7% 21 Apr 2021 10-Q 22 Apr 2021 2021 Q1
Q4 2020 152,335,731 -21,728,280 -12% 02 Feb 2021 10-K 03 Feb 2021 2020 FY
Q3 2020 153,881,597 -26,560,281 -15% 20 Oct 2020 10-Q 21 Oct 2020 2020 Q3
Q2 2020 158,313,471 -26,133,747 -14% 21 Jul 2020 10-Q 22 Jul 2020 2020 Q2
Q1 2020 163,187,486 -30,705,911 -16% 22 Apr 2020 10-Q 23 Apr 2020 2020 Q1
Q4 2019 174,064,011 -22,644,773 -12% 04 Feb 2020 10-K 06 Feb 2020 2019 FY
Q3 2019 180,441,878 -21,040,717 -10% 21 Oct 2019 10-Q 22 Oct 2019 2019 Q3
Q2 2019 184,447,218 -16,995,632 -8.4% 19 Jul 2019 10-Q 24 Jul 2019 2019 Q2
Q1 2019 193,893,397 -17,114,548 -8.1% 19 Apr 2019 10-Q 24 Apr 2019 2019 Q1
Q4 2018 196,708,784 -14,853,902 -7% 01 Feb 2019 10-K 06 Feb 2019 2018 FY
Q3 2018 201,482,595 -9,994,341 -4.7% 19 Oct 2018 10-Q 23 Oct 2018 2018 Q3
Q2 2018 201,442,850 -9,988,896 -4.7% 20 Jul 2018 10-Q 24 Jul 2018 2018 Q2
Q1 2018 211,007,945 -1,107,258 -0.52% 20 Apr 2018 10-Q 24 Apr 2018 2018 Q1
Q4 2017 211,562,686 -4,389,259 -2% 26 Jan 2018 10-K 01 Feb 2018 2017 FY
Q3 2017 211,476,936 -6,097,543 -2.8% 20 Oct 2017 10-Q 24 Oct 2017 2017 Q3
Q2 2017 211,431,746 -7,689,016 -3.5% 21 Jul 2017 10-Q 25 Jul 2017 2017 Q2
Q1 2017 212,115,203 -6,936,288 -3.2% 21 Apr 2017 10-Q 25 Apr 2017 2017 Q1
Q4 2016 215,951,945 -2,720,772 -1.2% 27 Jan 2017 10-K 02 Feb 2017 2016 FY
Q3 2016 217,574,479 -5,328,630 -2.4% 21 Oct 2016 10-Q 26 Oct 2016 2016 Q3
Q2 2016 219,120,762 -16,048,463 -6.8% 15 Jul 2016 10-Q 21 Jul 2016 2016 Q2
Q1 2016 219,051,491 -16,178,021 -6.9% 15 Apr 2016 10-Q 21 Apr 2016 2016 Q1
Q4 2015 218,672,717 -15,941,757 -6.8% 29 Jan 2016 10-K 03 Feb 2016 2015 FY
Q3 2015 222,903,109 -13,252,298 -5.6% 16 Oct 2015 10-Q 21 Oct 2015 2015 Q3
Q2 2015 235,169,225 -975,480 -0.41% 17 Jul 2015 10-Q 24 Jul 2015 2015 Q2
Q1 2015 235,229,512 -1,970,313 -0.83% 17 Apr 2015 10-Q 24 Apr 2015 2015 Q1
Q4 2014 234,614,474 -1,779,456 -0.75% 30 Jan 2015 10-K 04 Feb 2015 2014 FY
Q3 2014 236,155,407 -57,523 -0.02% 17 Oct 2014 10-Q 22 Oct 2014 2014 Q3
Q2 2014 236,144,705 -1,526,888 -0.64% 18 Jul 2014 10-Q 23 Jul 2014 2014 Q2
Q1 2014 237,199,825 -174,990 -0.07% 18 Apr 2014 10-Q 23 Apr 2014 2014 Q1
Q4 2013 236,393,930 +81,739 +0.04% 31 Jan 2014 10-K 06 Feb 2014 2013 FY
Q3 2013 236,212,930 -383,992 -0.16% 21 Oct 2013 10-Q 28 Oct 2013 2013 Q3
Q2 2013 237,671,593 +1,324,638 +0.56% 18 Jul 2013 10-Q 25 Jul 2013 2013 Q2
Q1 2013 237,374,815 -2,188,084 -0.91% 18 Apr 2013 10-Q 25 Apr 2013 2013 Q1
Q4 2012 236,312,191 -2,412,874 -1% 31 Jan 2013 10-K 05 Feb 2013 2012 FY
Q3 2012 236,596,922 -6,320,427 -2.6% 19 Oct 2012 10-Q 25 Oct 2012 2012 Q3
Q2 2012 236,346,955 -6,198,816 -2.6% 18 Jul 2012 10-Q 24 Jul 2012 2012 Q2
Q1 2012 239,562,899 -2,069,290 -0.86% 24 Apr 2012 10-Q 01 May 2012 2012 Q1
Q4 2011 238,725,065 -2,186,818 -0.91% 31 Jan 2012 10-K 03 Feb 2012 2011 FY
Q3 2011 242,917,349 +4,615,080 +1.9% 25 Oct 2011 10-Q 28 Oct 2011 2011 Q3
Q2 2011 242,545,771 +630,535 +0.26% 22 Jul 2011 10-Q 26 Jul 2011 2011 Q2
Q1 2011 241,632,189 -25,365,818 -9.5% 18 Apr 2011 10-Q 21 Apr 2011 2011 Q1
Q4 2010 240,911,883 -28,689,379 -11% 31 Jan 2011 10-K 04 Feb 2011 2010 FY
Q3 2010 238,302,269 22 Oct 2010 10-Q 26 Oct 2010 2010 Q3
Q2 2010 241,915,236 16 Jul 2010 10-Q 20 Jul 2010 2010 Q2
Q1 2010 266,998,007 16 Apr 2010 10-Q 20 Apr 2010 2010 Q1
Q4 2009 269,601,262 05 Feb 2010 10-K 09 Feb 2010 2009 FY
* An asterisk sign (*) next to the value indicates that the value is likely invalid.