Stocks · Health care · Biological Products, (No Diagnostic Substances)

Biogen

BIIB Clue Score49
United States Fiscal year ends December CIK 0000875045
225.71
+3.33%
Close, 9 Oct 2026 · USD

Price, with every insider trade on it

Closing prices, 12 months · point at a dot for who traded, or at the line for the close
225.71 on 9 Oct 2026
229 185 142 Oct 2025 Apr 2026 Oct 2026 13 Oct 2025 $144.69 14 Oct 2025 $145.31 15 Oct 2025 $143.66 16 Oct 2025 $142.26 17 Oct 2025 $143.00 20 Oct 2025 $146.63 21 Oct 2025 $146.22 22 Oct 2025 $147.72 23 Oct 2025 $150.08 24 Oct 2025 $149.89 27 Oct 2025 $150.43 28 Oct 2025 $149.13 29 Oct 2025 $147.86 30 Oct 2025 $149.61 31 Oct 2025 $154.27 3 Nov 2025 $151.44 4 Nov 2025 $149.33 5 Nov 2025 $153.43 6 Nov 2025 $156.74 7 Nov 2025 $155.51 10 Nov 2025 $156.26 11 Nov 2025 $159.56 12 Nov 2025 $161.48 13 Nov 2025 $164.73 14 Nov 2025 $167.55 17 Nov 2025 $164.68 18 Nov 2025 $168.83 19 Nov 2025 $167.93 20 Nov 2025 $168.18 21 Nov 2025 $175.30 24 Nov 2025 $176.82 25 Nov 2025 $181.96 26 Nov 2025 $181.94 28 Nov 2025 $182.09 1 Dec 2025 $177.78 2 Dec 2025 $180.18 3 Dec 2025 $180.75 4 Dec 2025 $181.98 5 Dec 2025 $181.30 8 Dec 2025 $180.44 9 Dec 2025 $175.84 10 Dec 2025 $177.55 11 Dec 2025 $172.50 12 Dec 2025 $174.10 15 Dec 2025 $175.74 16 Dec 2025 $171.50 17 Dec 2025 $172.10 18 Dec 2025 $169.91 19 Dec 2025 $174.80 22 Dec 2025 $174.70 23 Dec 2025 $174.82 24 Dec 2025 $176.33 26 Dec 2025 $177.08 29 Dec 2025 $176.83 30 Dec 2025 $176.40 31 Dec 2025 $175.99 2 Jan 2026 $177.82 5 Jan 2026 $174.63 6 Jan 2026 $182.61 7 Jan 2026 $186.91 8 Jan 2026 $186.00 9 Jan 2026 $187.62 12 Jan 2026 $185.63 13 Jan 2026 $178.30 14 Jan 2026 $169.31 15 Jan 2026 $168.57 16 Jan 2026 $164.42 20 Jan 2026 $165.38 21 Jan 2026 $172.62 22 Jan 2026 $173.80 23 Jan 2026 $171.59 26 Jan 2026 $173.12 27 Jan 2026 $174.12 28 Jan 2026 $174.83 29 Jan 2026 $176.18 30 Jan 2026 $179.89 2 Feb 2026 $179.09 3 Feb 2026 $176.76 4 Feb 2026 $185.45 5 Feb 2026 $185.36 6 Feb 2026 $201.18 9 Feb 2026 $193.81 10 Feb 2026 $188.99 11 Feb 2026 $191.20 12 Feb 2026 $195.50 13 Feb 2026 $196.52 17 Feb 2026 $195.62 18 Feb 2026 $194.13 19 Feb 2026 $192.08 20 Feb 2026 $192.03 23 Feb 2026 $196.34 24 Feb 2026 $195.13 25 Feb 2026 $190.73 26 Feb 2026 $188.02 27 Feb 2026 $191.82 2 Mar 2026 $188.05 3 Mar 2026 $184.02 4 Mar 2026 $189.94 5 Mar 2026 $188.08 6 Mar 2026 $184.87 9 Mar 2026 $188.24 10 Mar 2026 $188.41 11 Mar 2026 $190.48 12 Mar 2026 $184.90 13 Mar 2026 $181.55 16 Mar 2026 $183.26 17 Mar 2026 $185.29 18 Mar 2026 $182.31 19 Mar 2026 $183.41 20 Mar 2026 $181.46 23 Mar 2026 $183.64 24 Mar 2026 $183.94 25 Mar 2026 $189.18 26 Mar 2026 $191.06 27 Mar 2026 $183.84 30 Mar 2026 $187.57 31 Mar 2026 $183.33 1 Apr 2026 $183.78 2 Apr 2026 $177.34 6 Apr 2026 $172.34 7 Apr 2026 $175.61 8 Apr 2026 $179.90 9 Apr 2026 $177.11 10 Apr 2026 $172.97 13 Apr 2026 $176.37 14 Apr 2026 $178.96 15 Apr 2026 $180.54 16 Apr 2026 $176.02 17 Apr 2026 $177.35 20 Apr 2026 $183.34 21 Apr 2026 $185.95 22 Apr 2026 $190.07 23 Apr 2026 $187.88 24 Apr 2026 $184.38 27 Apr 2026 $180.67 28 Apr 2026 $183.38 29 Apr 2026 $194.38 30 Apr 2026 $189.28 1 May 2026 $187.06 4 May 2026 $187.21 5 May 2026 $189.13 6 May 2026 $190.68 7 May 2026 $191.38 8 May 2026 $193.45 11 May 2026 $197.95 12 May 2026 $199.36 13 May 2026 $204.53 14 May 2026 $191.37 15 May 2026 $192.95 18 May 2026 $191.91 19 May 2026 $190.56 20 May 2026 $187.80 21 May 2026 $189.47 22 May 2026 $193.76 26 May 2026 $193.08 27 May 2026 $196.97 28 May 2026 $196.39 29 May 2026 $196.00 1 Jun 2026 $192.23 2 Jun 2026 $188.83 3 Jun 2026 $195.96 4 Jun 2026 $196.45 5 Jun 2026 $195.34 8 Jun 2026 $192.62 9 Jun 2026 $199.10 10 Jun 2026 $194.24 11 Jun 2026 $199.96 12 Jun 2026 $200.05 15 Jun 2026 $198.64 16 Jun 2026 $195.61 17 Jun 2026 $198.67 18 Jun 2026 $196.58 22 Jun 2026 $199.71 23 Jun 2026 $197.19 24 Jun 2026 $199.59 25 Jun 2026 $201.96 26 Jun 2026 $216.03 29 Jun 2026 $216.63 30 Jun 2026 $216.06 1 Jul 2026 $209.74 2 Jul 2026 $216.12 6 Jul 2026 $208.46 7 Jul 2026 $205.70 8 Jul 2026 $200.36 9 Jul 2026 $198.91 10 Jul 2026 $199.15 13 Jul 2026 $209.03 14 Jul 2026 $191.95 15 Jul 2026 $197.24 16 Jul 2026 $208.92 17 Jul 2026 $205.99 20 Jul 2026 $199.95 21 Jul 2026 $203.16 22 Jul 2026 $197.74 23 Jul 2026 $200.62 24 Jul 2026 $202.19 27 Jul 2026 $200.14 28 Jul 2026 $205.61 29 Jul 2026 $209.23 30 Jul 2026 $207.93 31 Jul 2026 $202.95 3 Aug 2026 $201.82 4 Aug 2026 $208.45 5 Aug 2026 $206.63 6 Aug 2026 $206.28 7 Aug 2026 $207.94 10 Aug 2026 $207.13 11 Aug 2026 $203.89 12 Aug 2026 $208.87 13 Aug 2026 $210.65 14 Aug 2026 $209.83 17 Aug 2026 $209.15 18 Aug 2026 $212.55 19 Aug 2026 $221.56 20 Aug 2026 $214.35 21 Aug 2026 $216.78 24 Aug 2026 $218.12 25 Aug 2026 $220.77 26 Aug 2026 $221.07 27 Aug 2026 $221.50 28 Aug 2026 $218.50 31 Aug 2026 $216.65 1 Sep 2026 $216.04 2 Sep 2026 $222.67 3 Sep 2026 $224.51 4 Sep 2026 $220.83 8 Sep 2026 $212.50 9 Sep 2026 $210.73 10 Sep 2026 $215.43 11 Sep 2026 $217.15 14 Sep 2026 $217.36 15 Sep 2026 $216.17 16 Sep 2026 $216.01 17 Sep 2026 $219.05 18 Sep 2026 $215.50 21 Sep 2026 $219.07 22 Sep 2026 $225.36 23 Sep 2026 $227.53 24 Sep 2026 $226.36 25 Sep 2026 $227.60 28 Sep 2026 $228.69 29 Sep 2026 $227.07 30 Sep 2026 $225.88 1 Oct 2026 $222.82 2 Oct 2026 $219.88 5 Oct 2026 $223.59 6 Oct 2026 $222.89 7 Oct 2026 $222.15 8 Oct 2026 $218.43 9 Oct 2026 $225.71 Singhal Priya Head of Development Sold on a plan $134.12K 2 Feb 2026 · at $179.30 · 10.7% of stake Singhal Priya Head of Development Sold on a plan $531.55K 9 Feb 2026 · at $199.83 · 24.9% of stake Murphy Nicole Head of Pharm Ops and Tech Bought $585.11 12 Feb 2026 · at $195.04 · 0.0% of stake Minor Lloyd Director Sold on a plan $120.58K 3 Aug 2026 · at $203.34 · 15.3% of stake Minor Lloyd Director Sold on a plan $119.17K 4 Aug 2026 · at $200.96 · 18.1% of stake
1 buy0 sales at will4 planned sales

Key numbers

Fiscal year 2025, ended 31 Dec 2025, as filed
Revenue
$9.89B
Net income
$1.29B
Free cash flow
$2.05B
Net margin
13.1%
Return on equity
7.1%
Debt to equity
0.34
Revenue growth, 1 yr
2.2%
Revenue growth, 5 yr
-6.0% a year
EPS growth, 1 yr
-21.4%

Revenue and net income

Fiscal years, as filed with the SEC · point at a year for the detail
13.4B 4B FY20 Fiscal year 2020 Revenue $13.44B Net income $4.00B Margin 29.8% 11B 1.6B FY21 Fiscal year 2021 Revenue $10.98B Net income $1.56B Margin 14.2% · growth -18.3% 10.2B 3B FY22 Fiscal year 2022 Revenue $10.17B Net income $3.05B Margin 29.9% · growth -7.4% 9.8B 1.2B FY23 Fiscal year 2023 Revenue $9.84B Net income $1.16B Margin 11.8% · growth -3.3% 9.7B 1.6B FY24 Fiscal year 2024 Revenue $9.68B Net income $1.63B Margin 16.9% · growth -1.6% 9.9B 1.3B FY25 Fiscal year 2025 Revenue $9.89B Net income $1.29B Margin 13.1% · growth +2.2%
RevenueNet incomeLoss

Latest insider transactions

From Form 4, most recent first
All of them →
DateInsiderTypeValueOf own stake
4 Aug 2026 Minor Lloyd
Director
Sold on a plan $119.17K 18.1%
3 Aug 2026 Minor Lloyd
Director
Sold on a plan $120.58K 15.3%
12 Feb 2026 Murphy Nicole
Head of Pharm Ops and Tech
Bought $585.11 0.0%
9 Feb 2026 Singhal Priya
Head of Development
Sold on a plan $531.55K 24.9%
2 Feb 2026 Singhal Priya
Head of Development
Sold on a plan $134.12K 10.7%
2 Sep 2025 Singhal Priya
Head of Development
Sold on a plan $69.05K 8.2%