Financial Metrics

BIIB BIOGEN INC.

Range: 2016-01-01 to 2026-04-29

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Financial Statements

Grouped by statement

Income Statement

Frequency	Period End	Value	% Chg	Unit	Form	Filed
Quarterly	2016-03-31	4.43	—	USD/shares	10-Q	2017-04-25
Quarterly	2016-06-30	4.79	+8.1%	USD/shares	10-Q	2017-07-25
Quarterly	2016-09-30	4.71	-1.7%	USD/shares	10-Q	2017-10-24
Quarterly	2017-03-31	3.46	-26.5%	USD/shares	10-Q	2018-04-24
Quarterly	2017-06-30	4.07	+17.6%	USD/shares	10-Q	2018-07-24
Quarterly	2017-09-30	5.79	+42.3%	USD/shares	10-Q	2018-10-23
Quarterly	2018-03-31	5.54	-4.3%	USD/shares	10-Q	2019-04-24
Quarterly	2018-06-30	4.18	-24.5%	USD/shares	10-Q	2019-07-24
Quarterly	2018-09-30	7.15	+71.1%	USD/shares	10-Q	2019-10-22
Quarterly	2019-03-31	7.15	+0.0%	USD/shares	10-Q	2020-04-23
Quarterly	2019-06-30	7.85	+9.8%	USD/shares	10-Q	2020-07-22
Quarterly	2019-09-30	8.39	+6.9%	USD/shares	10-Q	2020-10-21
Quarterly	2020-03-31	8.08	-3.7%	USD/shares	10-Q	2021-04-22
Quarterly	2020-06-30	9.59	+18.7%	USD/shares	10-Q	2021-07-22
Quarterly	2020-09-30	4.46	-53.5%	USD/shares	10-Q	2021-10-20
Quarterly	2021-03-31	2.69	-39.7%	USD/shares	10-Q	2022-05-03
Quarterly	2021-06-30	2.99	+11.2%	USD/shares	10-Q	2022-07-20
Quarterly	2021-09-30	2.22	-25.8%	USD/shares	10-Q	2022-10-25
Quarterly	2022-03-31	2.06	-7.2%	USD/shares	10-Q	2023-04-25
Quarterly	2022-06-30	7.24	+251.5%	USD/shares	10-Q	2023-07-25
Quarterly	2022-09-30	7.84	+8.3%	USD/shares	10-Q	2023-11-08
Quarterly	2023-03-31	2.67	-65.9%	USD/shares	10-Q	2024-04-24
Quarterly	2023-06-30	4.07	+52.4%	USD/shares	10-Q	2024-08-01
Quarterly	2023-09-30	-0.47	-111.5%	USD/shares	10-Q	2024-10-30
Quarterly	2024-03-31	2.7	+674.5%	USD/shares	10-Q	2025-05-01
Quarterly	2024-06-30	4.0	+48.1%	USD/shares	10-Q	2025-07-31
Quarterly	2024-09-30	2.66	-33.5%	USD/shares	10-Q	2025-10-30
Quarterly	2025-03-31	1.64	-38.3%	USD/shares	10-Q	2025-05-01
Quarterly	2025-06-30	4.33	+164.0%	USD/shares	10-Q	2025-07-31
Quarterly	2025-09-30	3.17	-26.8%	USD/shares	10-Q	2025-10-30
Annual	2016-12-31	16.93	—	USD/shares	10-K	2019-02-06
Annual	2017-12-31	11.92	-29.6%	USD/shares	10-K	2020-02-06
Annual	2018-12-31	21.58	+81.0%	USD/shares	10-K	2021-02-03
Annual	2019-12-31	31.42	+45.6%	USD/shares	10-K	2022-02-03
Annual	2020-12-31	24.8	-21.1%	USD/shares	10-K	2023-02-15
Annual	2021-12-31	10.4	-58.1%	USD/shares	10-K	2024-02-14
Annual	2022-12-31	20.87	+100.7%	USD/shares	10-K	2025-02-12
Annual	2023-12-31	7.97	-61.8%	USD/shares	10-K	2026-02-06
Annual	2024-12-31	11.18	+40.3%	USD/shares	10-K	2026-02-06
Annual	2025-12-31	8.79	-21.4%	USD/shares	10-K	2026-02-06

Balance Sheet

Frequency	Period End	Value	% Chg	Unit	Form	Filed
Quarterly	2016-03-31	6535600000.0	—	USD	10-Q	2016-04-21
Quarterly	2016-06-30	6538300000.0	+0.0%	USD	10-Q	2016-07-21
Quarterly	2016-09-30	6529600000.0	-0.1%	USD	10-Q	2016-10-26
Quarterly	2016-12-31	6512700000.0	-0.3%	USD	10-Q	2017-10-24
Quarterly	2017-03-31	5952700000.0	-8.6%	USD	10-Q	2017-04-25
Quarterly	2017-06-30	5954000000.0	+0.0%	USD	10-Q	2017-07-25
Quarterly	2017-09-30	5938300000.0	-0.3%	USD	10-Q	2017-10-24
Quarterly	2017-12-31	5935000000.0	-0.1%	USD	10-Q	2018-10-23
Quarterly	2018-03-31	5929400000.0	-0.1%	USD	10-Q	2018-04-24
Quarterly	2018-06-30	5928400000.0	-0.0%	USD	10-Q	2018-07-24
Quarterly	2018-09-30	5931100000.0	+0.0%	USD	10-Q	2018-10-23
Quarterly	2018-12-31	5936500000.0	+0.1%	USD	10-Q	2019-10-22
Quarterly	2019-03-31	5943200000.0	+0.1%	USD	10-Q	2019-04-24
Quarterly	2019-06-30	5948500000.0	+0.1%	USD	10-Q	2019-07-24
Quarterly	2019-09-30	4458200000.0	-25.1%	USD	10-Q	2019-10-22
Quarterly	2019-12-31	4459000000.0	+0.0%	USD	10-Q	2020-10-21
Quarterly	2020-03-31	4459900000.0	+0.0%	USD	10-Q	2020-04-23
Quarterly	2020-06-30	7423800000.0	+66.5%	USD	10-Q	2020-07-22
Quarterly	2020-09-30	7425000000.0	+0.0%	USD	10-Q	2020-10-21
Quarterly	2020-12-31	7426200000.0	+0.0%	USD	10-Q	2021-10-20
Quarterly	2021-03-31	7267200000.0	-2.1%	USD	10-Q	2021-04-22
Quarterly	2021-06-30	7269200000.0	+0.0%	USD	10-Q	2021-07-22
Quarterly	2021-09-30	6272300000.0	-13.7%	USD	10-Q	2021-10-20
Quarterly	2021-12-31	6274000000.0	+0.0%	USD	10-Q	2022-10-25
Quarterly	2022-03-31	6275700000.0	+0.0%	USD	10-Q	2022-05-03
Quarterly	2022-06-30	6277400000.0	+0.0%	USD	10-Q	2022-07-20
Quarterly	2022-09-30	6279200000.0	+0.0%	USD	10-Q	2022-10-25
Quarterly	2022-12-31	6281000000.0	+0.0%	USD	10-Q	2023-11-08
Quarterly	2023-03-31	6282700000.0	+0.0%	USD	10-Q	2023-04-25
Quarterly	2023-06-30	6284600000.0	+0.0%	USD	10-Q	2023-07-25
Quarterly	2023-09-30	6786400000.0	+8.0%	USD	10-Q	2023-11-08
Quarterly	2023-12-31	6788200000.0	+0.0%	USD	10-Q	2024-10-30
Quarterly	2024-03-31	6290100000.0	-7.3%	USD	10-Q	2024-04-24
Quarterly	2024-06-30	6292000000.0	+0.0%	USD	10-Q	2024-08-01
Quarterly	2024-09-30	4545800000.0	-27.8%	USD	10-Q	2024-10-30
Quarterly	2024-12-31	4547200000.0	+0.0%	USD	10-Q	2025-10-30
Quarterly	2025-03-31	4548700000.0	+0.0%	USD	10-Q	2025-05-01
Quarterly	2025-06-30	6283700000.0	+38.1%	USD	10-Q	2025-07-31
Quarterly	2025-09-30	6285100000.0	+0.0%	USD	10-Q	2025-10-30
Annual	2016-12-31	6512700000.0	—	USD	10-K	2018-02-01
Annual	2017-12-31	5935000000.0	-8.9%	USD	10-K	2019-02-06
Annual	2018-12-31	5936500000.0	+0.0%	USD	10-K	2020-02-06
Annual	2019-12-31	4459000000.0	-24.9%	USD	10-K	2021-02-03
Annual	2020-12-31	7426200000.0	+66.5%	USD	10-K	2022-02-03
Annual	2021-12-31	6274000000.0	-15.5%	USD	10-K	2023-02-15
Annual	2022-12-31	6281000000.0	+0.1%	USD	10-K	2023-02-15
Annual	2023-12-31	6938200000.0	+10.5%	USD	10-K	2024-02-14
Annual	2024-12-31	6295800000.0	-9.3%	USD	10-K	2025-02-12
Annual	2025-12-31	6286800000.0	-0.1%	USD	10-K	2026-02-06

Cash Flow

Frequency	Period End	Value	% Chg	Unit	Form	Filed
Quarterly	2016-03-31	126900000.0	—	USD	10-Q	2017-04-25
Quarterly	2016-06-30	263700000.0	+107.8%	USD	10-Q	2017-07-25
Quarterly	2016-09-30	434000000.0	+64.6%	USD	10-Q	2017-10-24
Quarterly	2017-03-31	210000000.0	-51.6%	USD	10-Q	2018-04-24
Quarterly	2017-06-30	407700000.0	+94.1%	USD	10-Q	2018-07-24
Quarterly	2017-09-30	636800000.0	+56.2%	USD	10-Q	2018-10-23
Quarterly	2018-03-31	194700000.0	-69.4%	USD	10-Q	2019-04-24
Quarterly	2018-06-30	381500000.0	+95.9%	USD	10-Q	2019-07-24
Quarterly	2018-09-30	544700000.0	+42.8%	USD	10-Q	2019-10-22
Quarterly	2019-03-31	127100000.0	-76.7%	USD	10-Q	2020-04-23
Quarterly	2019-06-30	314000000.0	+147.0%	USD	10-Q	2020-07-22
Quarterly	2019-09-30	404100000.0	+28.7%	USD	10-Q	2020-10-21
Quarterly	2020-03-31	149700000.0	-63.0%	USD	10-Q	2021-04-22
Quarterly	2020-06-30	254700000.0	+70.1%	USD	10-Q	2021-07-22
Quarterly	2020-09-30	338800000.0	+33.0%	USD	10-Q	2021-10-20
Quarterly	2021-03-31	92600000.0	-72.7%	USD	10-Q	2022-05-03
Quarterly	2021-06-30	164500000.0	+77.6%	USD	10-Q	2022-07-20
Quarterly	2021-09-30	206500000.0	+25.5%	USD	10-Q	2022-10-25
Quarterly	2022-03-31	57900000.0	-72.0%	USD	10-Q	2023-04-25
Quarterly	2022-06-30	94800000.0	+63.7%	USD	10-Q	2023-07-25
Quarterly	2022-09-30	153900000.0	+62.3%	USD	10-Q	2023-11-08
Quarterly	2023-03-31	66600000.0	-56.7%	USD	10-Q	2024-04-24
Quarterly	2023-06-30	137600000.0	+106.6%	USD	10-Q	2024-08-01
Quarterly	2023-09-30	211800000.0	+53.9%	USD	10-Q	2024-10-30
Quarterly	2024-03-31	45900000.0	-78.3%	USD	10-Q	2025-05-01
Quarterly	2024-06-30	79400000.0	+73.0%	USD	10-Q	2025-07-31
Quarterly	2024-09-30	114400000.0	+44.1%	USD	10-Q	2025-10-30
Quarterly	2025-03-31	37100000.0	-67.6%	USD	10-Q	2025-05-01
Quarterly	2025-06-30	63700000.0	+71.7%	USD	10-Q	2025-07-31
Quarterly	2025-09-30	109900000.0	+72.5%	USD	10-Q	2025-10-30
Annual	2016-12-31	616100000.0	—	USD	10-K	2019-02-06
Annual	2017-12-31	867400000.0	+40.8%	USD	10-K	2020-02-06
Annual	2018-12-31	770600000.0	-11.2%	USD	10-K	2021-02-03
Annual	2019-12-31	514500000.0	-33.2%	USD	10-K	2022-02-03
Annual	2020-12-31	424800000.0	-17.4%	USD	10-K	2023-02-15
Annual	2021-12-31	258100000.0	-39.2%	USD	10-K	2024-02-14
Annual	2022-12-31	240300000.0	-6.9%	USD	10-K	2025-02-12
Annual	2023-12-31	277000000.0	+15.3%	USD	10-K	2026-02-06
Annual	2024-12-31	153700000.0	-44.5%	USD	10-K	2026-02-06
Annual	2025-12-31	153800000.0	+0.1%	USD	10-K	2026-02-06

Share Data

Frequency	Period End	Value	% Chg	Unit	Form	Filed
Quarterly	2016-03-31	219300000.0	—	shares	10-Q	2017-04-25
Quarterly	2016-06-30	219400000.0	+0.0%	shares	10-Q	2017-07-25
Quarterly	2016-09-30	219400000.0	+0.0%	shares	10-Q	2017-10-24
Quarterly	2017-03-31	215900000.0	-1.6%	shares	10-Q	2018-04-24
Quarterly	2017-06-30	212200000.0	-1.7%	shares	10-Q	2018-07-24
Quarterly	2017-09-30	211800000.0	-0.2%	shares	10-Q	2018-10-23
Quarterly	2018-03-31	211700000.0	-0.0%	shares	10-Q	2019-04-24
Quarterly	2018-06-30	207300000.0	-2.1%	shares	10-Q	2019-07-24
Quarterly	2018-09-30	201900000.0	-2.6%	shares	10-Q	2019-10-22
Quarterly	2019-03-31	197000000.0	-2.4%	shares	10-Q	2020-04-23
Quarterly	2019-06-30	190400000.0	-3.4%	shares	10-Q	2020-07-22
Quarterly	2019-09-30	184200000.0	-3.3%	shares	10-Q	2020-10-21
Quarterly	2020-03-31	173100000.0	-6.0%	shares	10-Q	2021-04-22
Quarterly	2020-06-30	160900000.0	-7.0%	shares	10-Q	2021-07-22
Quarterly	2020-09-30	157200000.0	-2.3%	shares	10-Q	2021-10-20
Quarterly	2021-03-31	152300000.0	-3.1%	shares	10-Q	2022-05-03
Quarterly	2021-06-30	150100000.0	-1.4%	shares	10-Q	2022-07-20
Quarterly	2021-09-30	148600000.0	-1.0%	shares	10-Q	2022-10-25
Quarterly	2022-03-31	147600000.0	-0.7%	shares	10-Q	2023-04-25
Quarterly	2022-06-30	146200000.0	-0.9%	shares	10-Q	2023-07-25
Quarterly	2022-09-30	144800000.0	-1.0%	shares	10-Q	2023-11-08
Quarterly	2023-03-31	145200000.0	+0.3%	shares	10-Q	2024-04-24
Quarterly	2023-06-30	145500000.0	+0.2%	shares	10-Q	2024-08-01
Quarterly	2023-09-30	144800000.0	-0.5%	shares	10-Q	2024-10-30
Quarterly	2024-03-31	145900000.0	+0.8%	shares	10-Q	2025-05-01
Quarterly	2024-06-30	145900000.0	+0.0%	shares	10-Q	2025-07-31
Quarterly	2024-09-30	146100000.0	+0.1%	shares	10-Q	2025-10-30
Quarterly	2025-03-31	146600000.0	+0.3%	shares	10-Q	2025-05-01
Quarterly	2025-06-30	146700000.0	+0.1%	shares	10-Q	2025-07-31
Quarterly	2025-09-30	147100000.0	+0.3%	shares	10-Q	2025-10-30
Annual	2016-12-31	218800000.0	—	shares	10-K	2019-02-06
Annual	2017-12-31	213000000.0	-2.7%	shares	10-K	2020-02-06
Annual	2018-12-31	205300000.0	-3.6%	shares	10-K	2021-02-03
Annual	2019-12-31	187400000.0	-8.7%	shares	10-K	2022-02-03
Annual	2020-12-31	161300000.0	-13.9%	shares	10-K	2023-02-15
Annual	2021-12-31	149600000.0	-7.3%	shares	10-K	2024-02-14
Annual	2022-12-31	146000000.0	-2.4%	shares	10-K	2025-02-12
Annual	2023-12-31	145600000.0	-0.3%	shares	10-K	2026-02-06
Annual	2024-12-31	145900000.0	+0.2%	shares	10-K	2026-02-06
Annual	2025-12-31	147100000.0	+0.8%	shares	10-K	2026-02-06

Credit and Bond Coverage

Company-level

Long-Term Debt (latest annual)

6,286,800,000

Total Liabilities (latest annual)

11,182,700,000

Current Liabilities (latest annual)

3,349,400,000

Metrics

Frequency	Period End	Value	% Chg	Unit	Form	Filed
Quarterly	2016-03-31	0.0938	—	ratio	10-Q	2017-04-25
Quarterly	2016-06-30	0.0919	-2.0%	ratio	10-Q	2017-07-25
Quarterly	2016-09-30	0.0850	-7.5%	ratio	10-Q	2017-10-24
Quarterly	2017-03-31	0.0652	-23.3%	ratio	10-Q	2018-04-24
Quarterly	2017-06-30	0.0745	+14.4%	ratio	10-Q	2018-07-24
Quarterly	2017-09-30	0.0954	+28.0%	ratio	10-Q	2018-10-23
Quarterly	2018-03-31	0.0834	-12.6%	ratio	10-Q	2019-04-24
Quarterly	2018-06-30	0.0747	-10.5%	ratio	10-Q	2019-07-24
Quarterly	2018-09-30	0.1049	+40.4%	ratio	10-Q	2019-10-22
Quarterly	2019-03-31	0.1019	-2.8%	ratio	10-Q	2020-04-23
Quarterly	2019-06-30	0.1154	+13.2%	ratio	10-Q	2020-07-22
Quarterly	2019-09-30	0.1105	-4.2%	ratio	10-Q	2020-10-21
Quarterly	2020-03-31	0.1111	+0.5%	ratio	10-Q	2021-04-22
Quarterly	2020-06-30	0.1423	+28.1%	ratio	10-Q	2021-07-22
Quarterly	2020-09-30	0.0655	-54.0%	ratio	10-Q	2021-10-20
Quarterly	2021-03-31	0.0379	-42.1%	ratio	10-Q	2022-05-03
Quarterly	2021-06-30	0.0914	+141.0%	ratio	10-Q	2022-07-20
Quarterly	2021-09-30	0.0292	-68.0%	ratio	10-Q	2022-10-25
Quarterly	2022-03-31	0.0195	-33.4%	ratio	10-Q	2023-04-25
Quarterly	2022-06-30	0.0892	+358.3%	ratio	10-Q	2023-07-25
Quarterly	2022-09-30	0.0889	-0.4%	ratio	10-Q	2023-11-08
Quarterly	2023-03-31	0.0281	-68.4%	ratio	10-Q	2024-04-24
Quarterly	2023-06-30	0.0410	+45.9%	ratio	10-Q	2024-08-01
Quarterly	2023-09-30	-0.0047	-111.5%	ratio	10-Q	2024-10-30
Quarterly	2024-03-31	0.0259	+648.2%	ratio	10-Q	2025-05-01
Quarterly	2024-06-30	0.0367	+42.0%	ratio	10-Q	2025-07-31
Quarterly	2024-09-30	0.0237	-35.3%	ratio	10-Q	2025-10-30
Quarterly	2025-03-31	0.0142	-40.4%	ratio	10-Q	2025-05-01
Quarterly	2025-06-30	0.0360	+154.1%	ratio	10-Q	2025-07-31
Quarterly	2025-09-30	0.0256	-28.8%	ratio	10-Q	2025-10-30
Annual	2016-12-31	0.3047	—	ratio	10-K	2019-02-06
Annual	2017-12-31	0.2119	-30.4%	ratio	10-K	2020-02-06
Annual	2018-12-31	0.3433	+62.0%	ratio	10-K	2021-02-03
Annual	2019-12-31	0.4414	+28.6%	ratio	10-K	2022-02-03
Annual	2020-12-31	0.3800	-13.9%	ratio	10-K	2023-02-15
Annual	2021-12-31	0.1576	-58.5%	ratio	10-K	2024-02-14
Annual	2022-12-31	0.2212	+40.3%	ratio	10-K	2025-02-12
Annual	2023-12-31	0.0785	-64.5%	ratio	10-K	2026-02-06
Annual	2024-12-31	0.0976	+24.4%	ratio	10-K	2026-02-06
Annual	2025-12-31	0.0708	-27.5%	ratio	10-K	2026-02-06

8-K Material Event Details

55 filings · 115 item records

This 8-K section tracks corporate event disclosures, not insider buy/sell sentiment. Insider trading direction is shown in the insider section below.

Event Type Distribution

Count per 8-K item

Insider Transaction History

488 transaction records

Net Insider Flow

Monthly open-market buy value minus open-market sell value

Monthly Insider Activity Mix

Share volume split between open-market trades, grants, and exercises

Transaction Value Timeline

Each circle = one priced transaction; size ∝ value X-axis date:

All Transactions

Date	Insider	Title	Type	Security	Shares	Price	Total Value	Post-Tx Shares
2026-04-01	Godbout Sean	Chief Accounting Officer	Exercise / conversion M · derivative	Restricted Stock Unit	181	$0.00	$0	364
2026-04-01	Godbout Sean	Chief Accounting Officer	Other disposed transaction F	Common Stock	54	$183.78	$9,924	1,342
2026-04-01	Godbout Sean	Chief Accounting Officer	Exercise / conversion M	Common Stock	181	$0.00	$0	1,396
2026-02-13	Murphy Nicole	Head of Pharm Ops and Tech	Equity grant / award A · derivative	Restricted Stock Unit	10,560	$0.00	$0	10,560
2026-02-13	Viehbacher Christopher	President and CEO	Equity grant / award A · derivative	Restricted Stock Unit	38,015	$0.00	$0	38,015
2026-02-12	Murphy Nicole	Head of Pharm Ops and Tech	Open-market buy P	Common Stock	3	$195.03	$585	19,611
2026-02-06	Viehbacher Christopher	President and CEO	Exercise / conversion M · derivative	Restricted Stock Unit	15,453	$0.00	$0	30,907
2026-02-06	Viehbacher Christopher	President and CEO	Exercise / conversion M · derivative	Restricted Stock Unit	9,008	$0.00	$0	9,009
2026-02-06	Viehbacher Christopher	President and CEO	Other disposed transaction F	Common Stock	6,624	$201.18	$1,332,616	29,924
2026-02-06	Viehbacher Christopher	President and CEO	Exercise / conversion M	Common Stock	15,453	$0.00	$0	36,548
2026-02-06	Viehbacher Christopher	President and CEO	Other disposed transaction F	Common Stock	4,356	$201.18	$876,340	21,095
2026-02-06	Viehbacher Christopher	President and CEO	Exercise / conversion M	Common Stock	9,008	$0.00	$0	25,451
2026-02-02	Singhal Priya	Head of Development	Open-market sell S	Common Stock	748	$179.30	$134,116	6,271
2026-01-30	Singhal Priya	Head of Development	Exercise / conversion M · derivative	Restricted Stock Unit	1,829	$0.00	$0	0
2026-01-30	Singhal Priya	Head of Development	Other disposed transaction F	Common Stock	582	$179.89	$104,696	7,019
2026-01-30	Singhal Priya	Head of Development	Exercise / conversion M	Common Stock	1,829	$0.00	$0	7,601
2025-12-01	Viehbacher Christopher	President and CEO	Exercise / conversion M · derivative	Restricted Stock Unit	7,040	$0.00	$0	0
2025-12-01	Viehbacher Christopher	President and CEO	Other disposed transaction F	Common Stock	3,404	$177.78	$605,163	16,443
2025-12-01	Viehbacher Christopher	President and CEO	Exercise / conversion M	Common Stock	7,040	$0.00	$0	19,847
2025-10-31	Grogan Jane	Head of Research	Exercise / conversion M · derivative	Restricted Stock Unit	695	$0.00	$0	695
2025-10-31	Grogan Jane	Head of Research	Other disposed transaction F	Common Stock	337	$154.27	$51,989	1,791
2025-10-31	Grogan Jane	Head of Research	Exercise / conversion M	Common Stock	695	$0.00	$0	2,128
2025-10-02	Godbout Sean	Chief Accounting Officer	Exercise / conversion M · derivative	Restricted Stock Unit	26	$0.00	$0	27
2025-10-02	Godbout Sean	Chief Accounting Officer	Other disposed transaction F	Common Stock	8	$155.25	$1,242	495
2025-10-02	Godbout Sean	Chief Accounting Officer	Exercise / conversion M	Common Stock	26	$0.00	$0	503
2025-09-02	Singhal Priya	Head of Development	Open-market sell S	Common Stock	517	$133.55	$69,045	5,772
2025-08-29	Singhal Priya	Head of Development	Exercise / conversion M · derivative	Restricted Stock Unit	1,669	$0.00	$0	0
2025-08-29	Singhal Priya	Head of Development	Other disposed transaction F	Common Stock	807	$132.22	$106,702	6,289
2025-08-29	Singhal Priya	Head of Development	Exercise / conversion M	Common Stock	1,669	$0.00	$0	7,096
2025-07-08	Izzar Rachid	Head of Global Product Strat.	Open-market sell S	Common Stock	2,223	$135.00	$300,105	6,330
2025-06-17	Pangalos Menelas N	Dir	Equity grant / award A · derivative	Restricted Stock Unit	2,370	$0.00	$0	2,370
2025-05-19	Singhal Priya	Head of Development	Open-market sell S	Common Stock	3,806	$126.25	$480,508	5,427
2025-05-02	DORSA CAROLINE	Dir	Open-market buy P	Common Stock	1,235	$122.72	$151,559	27,842
2025-05-01	Keeney Adam	Head of Corporate Development	Exercise / conversion M · derivative	Restricted Stock Unit	938	$0.00	$0	939
2025-05-01	Keeney Adam	Head of Corporate Development	Other disposed transaction F	Common Stock	454	$120.93	$54,902	2,384
2025-05-01	Keeney Adam	Head of Corporate Development	Exercise / conversion M	Common Stock	938	$0.00	$0	2,838
2025-04-01	Godbout Sean	Chief Accounting Officer	Equity grant / award A · derivative	Restricted Stock Unit	545	$0.00	$0	545
2025-03-07	SHERWIN STEPHEN A	Dir	Open-market sell S	Common Stock	8,760	$150.02	$1,314,142	11,318
2025-02-10	Singhal Priya	Head of Development	Exercise / conversion M · derivative	Restricted Stock Unit	1,212	$0.00	$0	0
2025-02-10	Singhal Priya	Head of Development	Other disposed transaction F	Common Stock	357	$142.54	$50,887	9,066
2025-02-10	Singhal Priya	Head of Development	Exercise / conversion M	Common Stock	1,212	$0.00	$0	9,423
2025-02-07	Viehbacher Christopher	President and CEO	Exercise / conversion M · derivative	Restricted Stock Unit	9,008	$0.00	$0	18,017
2025-02-07	Viehbacher Christopher	President and CEO	Other disposed transaction F	Common Stock	3,201	$141.35	$452,461	12,807
2025-02-07	Viehbacher Christopher	President and CEO	Exercise / conversion M	Common Stock	9,008	$0.00	$0	16,008
2025-02-07	Izzar Rachid	Head of Global Product Strat.	Exercise / conversion M · derivative	Restricted Stock Unit	1,801	$0.00	$0	3,604
2025-02-07	Izzar Rachid	Head of Global Product Strat.	Exercise / conversion M · derivative	Restricted Stock Unit	2,043	$0.00	$0	2,044
2025-02-07	Izzar Rachid	Head of Global Product Strat.	Exercise / conversion M	Common Stock	1,801	$0.00	$0	7,860
2025-02-07	Izzar Rachid	Head of Global Product Strat.	Other disposed transaction F	Common Stock	565	$141.35	$79,863	6,059
2025-02-07	Izzar Rachid	Head of Global Product Strat.	Other disposed transaction F	Common Stock	600	$141.35	$84,810	6,624
2025-02-07	Izzar Rachid	Head of Global Product Strat.	Exercise / conversion M	Common Stock	2,043	$0.00	$0	7,224
2025-02-06	Viehbacher Christopher	President and CEO	Equity grant / award A · derivative	Restricted Stock Unit	46,360	$0.00	$0	46,360
2025-01-31	Singhal Priya	Head of Development	Exercise / conversion M · derivative	Restricted Stock Unit	1,828	$0.00	$0	1,829
2025-01-31	Singhal Priya	Head of Development	Other disposed transaction F	Common Stock	578	$143.93	$83,192	6,676
2025-01-31	Singhal Priya	Head of Development	Exercise / conversion M	Common Stock	1,828	$0.00	$0	7,254
2024-12-09	Singhal Priya	Head of Development	Open-market sell S	Common Stock	110	$157.21	$17,293	5,426
2024-12-06	Singhal Priya	Head of Development	Exercise / conversion M · derivative	Restricted Stock Unit	426	$0.00	$0	0
2024-12-06	Singhal Priya	Head of Development	Other disposed transaction F	Common Stock	206	$157.78	$32,503	5,536
2024-12-06	Singhal Priya	Head of Development	Exercise / conversion M	Common Stock	426	$0.00	$0	5,742
2024-11-05	ALEXANDER SUSAN H	EVP Chief Legal Officer	Equity grant / award G	Common Stock	20,082	$0.00	$0	20,082
2024-11-01	Grogan Jane	Head of Research	Exercise / conversion M · derivative	Restricted Stock Unit	695	$0.00	$0	1,390
2024-11-01	Grogan Jane	Head of Research	Other disposed transaction F	Common Stock	204	$173.79	$35,453	491
2024-11-01	Grogan Jane	Head of Research	Exercise / conversion M	Common Stock	695	$0.00	$0	695
2024-09-03	Singhal Priya	Head of Development	Open-market sell S	Common Stock	431	$204.22	$88,019	5,316
2024-08-30	Singhal Priya	Head of Development	Exercise / conversion M · derivative	Restricted Stock Unit	1,668	$0.00	$0	1,669
2024-08-30	Singhal Priya	Head of Development	Other disposed transaction F	Common Stock	807	$204.76	$165,241	5,747
2024-08-30	Singhal Priya	Head of Development	Exercise / conversion M	Common Stock	1,668	$0.00	$0	6,554
2024-06-21	SHERWIN STEPHEN A	Dir	Equity grant / award A	Common Stock	1,340	$0.00	$0	20,078
2024-05-01	Keeney Adam	Head of Corporate Development	Exercise / conversion M · derivative	Restricted Stock Unit	938	$0.00	$0	1,877
2024-05-01	Keeney Adam	Head of Corporate Development	Other disposed transaction F	Common Stock	276	$216.13	$59,652	662
2024-05-01	Keeney Adam	Head of Corporate Development	Exercise / conversion M	Common Stock	938	$0.00	$0	938
2024-04-02	Singhal Priya	Head of Development	Open-market sell S	Common Stock	93	$213.09	$19,817	4,886
2024-04-01	Murphy Nicole	Head of Pharm Ops and Tech	Exercise / conversion M · derivative	Restricted Stock Unit	240	$0.00	$0	0
2024-04-01	Murphy Nicole	Head of Pharm Ops and Tech	Other disposed transaction F	Common Stock	117	$214.83	$25,135	9,634
2024-04-01	Murphy Nicole	Head of Pharm Ops and Tech	Exercise / conversion M	Common Stock	240	$0.00	$0	9,751
2024-02-22	Singhal Priya	Head of Development	Open-market sell S	Common Stock	262	$221.23	$57,962	4,886
2024-02-16	ALEXANDER SUSAN H	EVP Chief Legal Officer	Other disposed transaction J · derivative	Restricted Stock Unit	2,012	$0.00	$0	0
2024-02-16	ALEXANDER SUSAN H	EVP Chief Legal Officer	Exercise / conversion M · derivative	Restricted Stock Unit	1,614	$0.00	$0	2,012
2024-02-16	ALEXANDER SUSAN H	EVP Chief Legal Officer	Exercise / conversion M · derivative	Performance Stock Unit	3,423	$0.00	$0	0
2024-02-16	ALEXANDER SUSAN H	EVP Chief Legal Officer	Other disposed transaction F	Common Stock	781	$219.08	$171,101	51,683
2024-02-16	ALEXANDER SUSAN H	EVP Chief Legal Officer	Exercise / conversion M	Common Stock	1,614	$0.00	$0	52,464
2024-02-16	ALEXANDER SUSAN H	EVP Chief Legal Officer	Other disposed transaction F	Common Stock	1,656	$219.08	$362,796	50,850
2024-02-16	ALEXANDER SUSAN H	EVP Chief Legal Officer	Exercise / conversion M	Common Stock	3,423	$0.00	$0	52,506
2024-02-15	Rowinsky Eric K	Dir	Open-market buy P	Common Stock	455	$222.54	$101,256	20,629
2024-02-09	Gregory Ginger	EVP, Human Resources	Exercise / conversion M · derivative	Restricted Stock Unit	2,158	$0.00	$0	2,159
2024-02-09	Gregory Ginger	EVP, Human Resources	Other disposed transaction F	Common Stock	634	$240.98	$152,781	11,144
2024-02-09	Gregory Ginger	EVP, Human Resources	Exercise / conversion M	Common Stock	2,158	$0.00	$0	11,778
2024-02-08	ALEXANDER SUSAN H	EVP Chief Legal Officer	Exercise / conversion M · derivative	Restricted Stock Unit	2,190	$0.00	$0	4,380
2024-02-08	ALEXANDER SUSAN H	EVP Chief Legal Officer	Other disposed transaction F	Common Stock	655	$240.30	$157,396	47,446
2024-02-08	ALEXANDER SUSAN H	EVP Chief Legal Officer	Exercise / conversion M	Common Stock	2,190	$0.00	$0	48,101
2024-02-07	ALEXANDER SUSAN H	EVP Chief Legal Officer	Equity grant / award A · derivative	Restricted Stock Unit	5,820	$0.00	$0	5,820
2024-02-02	Singhal Priya	Head of Development	Open-market sell S	Common Stock	634	$245.93	$155,920	4,097
2024-02-01	Singhal Priya	Head of Development	Exercise / conversion M · derivative	Restricted Stock Unit	1,828	$0.00	$0	3,657
2024-02-01	Singhal Priya	Head of Development	Other disposed transaction F	Common Stock	561	$247.83	$139,033	4,731
2024-02-01	Singhal Priya	Head of Development	Exercise / conversion M	Common Stock	1,828	$0.00	$0	5,292
2024-01-29	Singhal Priya	Head of Development	Equity grant / award A · derivative	Performance Stock Unit	819	$0.00	$0	819
2023-12-11	Singhal Priya	Head of Development	Open-market sell S	Common Stock	110	$248.00	$27,280	3,464
2023-12-08	Singhal Priya	Head of Development	Exercise / conversion M · derivative	Restricted Stock Unit	426	$0.00	$0	426
2023-12-08	Singhal Priya	Head of Development	Other disposed transaction F	Common Stock	206	$239.29	$49,294	3,574
2023-12-08	Singhal Priya	Head of Development	Exercise / conversion M	Common Stock	426	$0.00	$0	3,780
2023-11-01	Grogan Jane	Head of Research	Equity grant / award A · derivative	Restricted Stock Unit	2,085	$0.00	$0	2,085
2023-09-26	BIOGEN INC.	10%	Open-market sell S	Common Stock	6,000,000	$0.50	$3,000,000	17,652,466
2023-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Other disposed transaction J · derivative	Restricted Stock Unit	2,763	$0.00	$0	0
2023-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Exercise / conversion M · derivative	Restricted Stock Unit	2,603	$0.00	$0	2,763
2023-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Exercise / conversion M · derivative	Restricted Stock Unit	2,682	$0.00	$0	0
2023-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Other disposed transaction F	Common Stock	1,332	$267.17	$355,870	12,728
2023-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Exercise / conversion M	Common Stock	2,603	$0.00	$0	14,060
2023-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Other disposed transaction F	Common Stock	1,372	$267.17	$366,557	11,457
2023-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Exercise / conversion M	Common Stock	2,682	$0.00	$0	12,829
2023-06-30	Izzar Rachid	Head of Global Product Strat.	Exercise / conversion M · derivative	Restricted Stock Unit	504	$0.00	$0	0
2023-06-30	Izzar Rachid	Head of Global Product Strat.	Other disposed transaction F	Common Stock	244	$284.85	$69,503	6,144
2023-06-30	Izzar Rachid	Head of Global Product Strat.	Exercise / conversion M	Common Stock	504	$0.00	$0	6,388
2023-06-26	SHERWIN STEPHEN A	Dir	Equity grant / award A	Common Stock	960	$0.00	$0	18,738
2023-05-01	Keeney Adam	Head of Corporate Development	Equity grant / award A · derivative	Restricted Stock Unit	2,815	$0.00	$0	2,815
2023-04-28	Gregory Ginger	EVP, Human Resources	Open-market sell S	Common Stock	2,681	$300.00	$804,300	8,483
2023-04-04	Singhal Priya	Head of Development	Open-market sell S	Common Stock	91	$277.11	$25,217	2,843
2023-03-31	Murphy Nicole	Head of Pharm Ops and Tech	Exercise / conversion M · derivative	Restricted Stock Unit	239	$0.00	$0	240
2023-03-31	Murphy Nicole	Head of Pharm Ops and Tech	Other disposed transaction F	Common Stock	116	$278.03	$32,251	5,702
2023-03-31	Murphy Nicole	Head of Pharm Ops and Tech	Exercise / conversion M	Common Stock	239	$0.00	$0	5,818
2023-03-28	Singhal Priya	Head of Development	Open-market sell S	Common Stock	568	$270.06	$153,394	2,842
2023-03-02	Singhal Priya	Head of Development	Other disposed transaction J · derivative	Restricted Stock Unit	341	$0.00	$0	0
2023-03-02	Singhal Priya	Head of Development	Exercise / conversion M · derivative	Restricted Stock Unit	297	$0.00	$0	341
2023-03-02	Singhal Priya	Head of Development	Other disposed transaction F	Common Stock	144	$268.75	$38,700	3,410
2023-03-02	Singhal Priya	Head of Development	Exercise / conversion M	Common Stock	297	$0.00	$0	3,554
2023-03-02	Singhal Priya	Head of Development	Other disposed transaction F	Common Stock	543	$268.75	$145,931	3,257
2023-02-17	Singhal Priya	Head of Development	Other disposed transaction J · derivative	Restricted Stock Unit	408	$0.00	$0	874
2023-02-17	Singhal Priya	Head of Development	Exercise / conversion M · derivative	Restricted Stock Unit	460	$0.00	$0	1,282
2023-02-17	Singhal Priya	Head of Development	Other disposed transaction F	Common Stock	151	$278.38	$42,035	3,800
2023-02-17	Singhal Priya	Head of Development	Exercise / conversion M	Common Stock	460	$0.00	$0	3,951
2023-02-10	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Other disposed transaction J · derivative	Restricted Stock Unit	1,770	$0.00	$0	0
2023-02-10	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Exercise / conversion M · derivative	Restricted Stock Unit	1,448	$0.00	$0	1,770
2023-02-10	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Exercise / conversion M · derivative	Restricted Stock Unit	2,575	$0.00	$0	5,150
2023-02-10	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Other disposed transaction F	Common Stock	2,737	$286.30	$783,603	44,920
2023-02-10	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Other disposed transaction F	Common Stock	701	$286.30	$200,696	47,657
2023-02-10	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Exercise / conversion M	Common Stock	1,448	$0.00	$0	48,358
2023-02-10	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Other disposed transaction F	Common Stock	764	$286.30	$218,733	46,910
2023-02-10	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Exercise / conversion M	Common Stock	2,575	$0.00	$0	47,674
2023-02-08	Murphy Nicole	Head of Pharm Ops and Tech	Equity grant / award A · derivative	Restricted Stock Unit	6,305	$0.00	$0	6,305
2023-02-01	Singhal Priya	Head of Development	Equity grant / award A · derivative	Restricted Stock Unit	5,485	$0.00	$0	5,485
2023-01-25	Kramer Robin	Chief Accounting Officer	Equity grant / award A	Common Stock	887	$0.00	$0	3,099
2022-12-08	Kramer Robin	Chief Accounting Officer	Exercise / conversion M · derivative	Restricted Stock Unit	350	$0.00	$0	702
2022-12-08	Kramer Robin	Chief Accounting Officer	Other disposed transaction F	Common Stock	156	$289.10	$45,100	2,212
2022-12-08	Kramer Robin	Chief Accounting Officer	Exercise / conversion M	Common Stock	350	$0.00	$0	2,368
2022-12-02	Izzar Rachid	Head of Alzheimer's Disease	Other disposed transaction J · derivative	Restricted Stock Unit	433	$0.00	$0	0
2022-12-02	Izzar Rachid	Head of Alzheimer's Disease	Exercise / conversion M · derivative	Restricted Stock Unit	425	$0.00	$0	433
2022-12-02	Izzar Rachid	Head of Alzheimer's Disease	Exercise / conversion M · derivative	Restricted Stock Unit	1,285	$0.00	$0	0
2022-12-02	Izzar Rachid	Head of Alzheimer's Disease	Other disposed transaction F	Common Stock	189	$298.90	$56,492	3,061
2022-12-02	Izzar Rachid	Head of Alzheimer's Disease	Exercise / conversion M	Common Stock	425	$0.00	$0	3,250
2022-12-02	Izzar Rachid	Head of Alzheimer's Disease	Other disposed transaction F	Common Stock	570	$298.90	$170,373	2,825
2022-12-02	Izzar Rachid	Head of Alzheimer's Disease	Exercise / conversion M	Common Stock	1,285	$0.00	$0	3,395
2022-12-01	Viehbacher Christopher	President and CEO	Equity grant / award A · derivative	Performance Stock Unit	45,998	$0.00	$0	45,998
2022-12-01	Viehbacher Christopher	President and CEO	Equity grant / award A · derivative	Restricted Stock Unit	7,040	$0.00	$0	7,040
2022-12-01	Viehbacher Christopher	President and CEO	Equity grant / award A · derivative	Stock Option	80,522	$0.00	$0	80,522
2022-11-14	Gregory Ginger	EVP, Human Resources	Open-market sell S	Common Stock	5,610	$300.11	$1,683,617	5,711
2022-10-27	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Open-market sell S	Common Stock	5,532	$280.70	$1,552,832	39,396
2022-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Other disposed transaction J · derivative	Restricted Stock Unit	3,298	$0.00	$0	5,366
2022-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Exercise / conversion M · derivative	Restricted Stock Unit	2,064	$0.00	$0	8,664
2022-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Exercise / conversion M · derivative	Restricted Stock Unit	2,682	$0.00	$0	2,682
2022-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Other disposed transaction F	Common Stock	1,056	$199.79	$210,978	6,745
2022-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Exercise / conversion M	Common Stock	2,064	$0.00	$0	7,801
2022-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Other disposed transaction F	Common Stock	1,372	$199.79	$274,112	5,737
2022-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Exercise / conversion M	Common Stock	2,682	$0.00	$0	7,109
2022-08-30	BIOGEN INC.	10%	Open-market sell S	Common Stock	100,000	$5.27	$526,520	23,652,466
2022-08-29	BIOGEN INC.	10%	Open-market sell S	Common Stock	400,000	$5.33	$2,130,720	23,752,466
2022-08-01	Murphy Nicole	Head of Pharm Ops and Tech	Exercise / conversion M · derivative	Restricted Stock Unit	825	$0.00	$0	0
2022-08-01	Murphy Nicole	Head of Pharm Ops and Tech	Exercise / conversion M · derivative	Restricted Stock Unit	255	$0.00	$0	0
2022-08-01	Murphy Nicole	Head of Pharm Ops and Tech	Other disposed transaction J · derivative	Restricted Stock Unit	299	$0.00	$0	255
2022-08-01	Murphy Nicole	Head of Pharm Ops and Tech	Other disposed transaction F	Common Stock	243	$209.26	$50,850	2,676
2022-08-01	Murphy Nicole	Head of Pharm Ops and Tech	Exercise / conversion M	Common Stock	825	$0.00	$0	2,919
2022-08-01	Murphy Nicole	Head of Pharm Ops and Tech	Other disposed transaction F	Common Stock	76	$209.26	$15,904	2,094
2022-08-01	Murphy Nicole	Head of Pharm Ops and Tech	Exercise / conversion M	Common Stock	255	$0.00	$0	2,170
2022-07-01	Kramer Robin	Chief Accounting Officer	Exercise / conversion M · derivative	Restricted Stock Unit	252	$0.00	$0	252
2022-07-01	Kramer Robin	Chief Accounting Officer	Other disposed transaction F	Common Stock	74	$210.63	$15,587	2,018
2022-07-01	Kramer Robin	Chief Accounting Officer	Exercise / conversion M	Common Stock	252	$0.00	$0	2,092
2022-06-15	SHERWIN STEPHEN A	Dir	Equity grant / award A	Common Stock	1,370	$0.00	$0	18,473
2022-04-01	Murphy Nicole	Head of Pharm Ops and Tech	Exercise / conversion M · derivative	Restricted Stock Unit	239	—	$0	479
2022-04-01	Murphy Nicole	Head of Pharm Ops and Tech	Other disposed transaction F	Common Stock	84	$210.65	$17,695	1,813
2022-04-01	Murphy Nicole	Head of Pharm Ops and Tech	Exercise / conversion M	Common Stock	239	—	—	1,897
2022-02-18	Vounatsos Michel	Chief Executive Officer	Other disposed transaction J · derivative	Restricted Stock Unit	8,909	$0.00	$0	30,210
2022-02-18	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M · derivative	Restricted Stock Unit	6,191	$0.00	$0	39,119
2022-02-18	Vounatsos Michel	Chief Executive Officer	Other disposed transaction F	Common Stock	2,746	$209.79	$576,083	67,261
2022-02-18	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M	Common Stock	6,191	$0.00	$0	70,007
2022-02-12	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Other disposed transaction J · derivative	Restricted Stock Unit	2,090	$0.00	$0	3,218
2022-02-12	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Exercise / conversion M · derivative	Restricted Stock Unit	1,126	$0.00	$0	5,308
2022-02-12	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Other disposed transaction J · derivative	Restricted Stock Unit	2,190	$0.00	$0	0
2022-02-12	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Exercise / conversion M · derivative	Restricted Stock Unit	1,154	$0.00	$0	2,190
2022-02-12	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Other disposed transaction F	Common Stock	1,044	$214.59	$224,032	44,102
2022-02-12	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Other disposed transaction F	Common Stock	500	$214.59	$107,295	45,146
2022-02-12	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Exercise / conversion M	Common Stock	1,126	$0.00	$0	45,646
2022-02-12	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Other disposed transaction F	Common Stock	512	$214.59	$109,870	44,520
2022-02-12	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Exercise / conversion M	Common Stock	1,154	$0.00	$0	45,032
2022-02-10	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Equity grant / award A · derivative	Restricted Stock Unit	7,725	$0.00	$0	7,725
2022-01-19	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Equity grant / award A	Common Stock	2,825	$0.00	$0	43,878
2022-01-19	Galdes Alphonse	EVP Pharmaceutical Oper & Tech	Equity grant / award A	Common Stock	658	$0.00	$0	5,064
2021-12-28	BIOGEN INC.	10%	Open-market sell S	Common Stock	2,764	$8.51	$23,522	24,152,466
2021-12-27	BIOGEN INC.	10%	Open-market sell S	Common Stock	600	$8.56	$5,136	24,155,230
2021-12-23	BIOGEN INC.	10%	Open-market sell S	Common Stock	81,187	$8.55	$694,530	24,155,830
2021-12-09	BIOGEN INC.	10%	Open-market sell S	Common Stock	23,660	$8.56	$202,541	24,237,017
2021-12-08	BIOGEN INC.	10%	Open-market sell S	Common Stock	75,814	$8.64	$654,828	24,260,677
2021-12-08	Kramer Robin	Chief Accounting Officer	Equity grant / award A · derivative	Restricted Stock Unit	1,052	$0.00	$0	1,052
2021-12-07	BIOGEN INC.	10%	Open-market sell S	Common Stock	52,178	$8.52	$444,437	24,336,491
2021-12-03	Kramer Robin	Chief Accounting Officer	Exercise / conversion M · derivative	Restricted Stock Unit	265	$0.00	$0	0
2021-12-03	Kramer Robin	Chief Accounting Officer	Other disposed transaction J · derivative	Restricted Stock Unit	104	$0.00	$0	0
2021-12-03	Kramer Robin	Chief Accounting Officer	Exercise / conversion M · derivative	Restricted Stock Unit	74	$0.00	$0	104
2021-12-03	Kramer Robin	Chief Accounting Officer	Other disposed transaction F	Common Stock	22	$223.92	$4,926	1,110
2021-12-03	Kramer Robin	Chief Accounting Officer	Other disposed transaction F	Common Stock	78	$223.92	$17,466	1,132
2021-12-03	Kramer Robin	Chief Accounting Officer	Exercise / conversion M	Common Stock	265	$223.92	$59,339	1,210
2021-12-03	Kramer Robin	Chief Accounting Officer	Exercise / conversion M	Common Stock	74	$223.92	$16,570	945
2021-12-02	BIOGEN INC.	10%	Open-market sell S	Common Stock	1,874	$8.51	$15,943	24,388,669
2021-12-02	Izzar Rachid	Head of Alzheimer's Disease	Other disposed transaction J · derivative	Restricted Stock Unit	484	$0.00	$0	858
2021-12-02	Izzar Rachid	Head of Alzheimer's Disease	Exercise / conversion M · derivative	Restricted Stock Unit	372	$0.00	$0	1,342
2021-12-02	Izzar Rachid	Head of Alzheimer's Disease	Other disposed transaction F	Common Stock	165	$228.52	$37,706	1,106
2021-12-02	Izzar Rachid	Head of Alzheimer's Disease	Exercise / conversion M	Common Stock	372	$228.52	$85,009	1,271
2021-12-01	BIOGEN INC.	10%	Open-market sell S	Common Stock	730	$8.52	$6,223	24,390,543
2021-11-26	BIOGEN INC.	10%	Open-market sell S	Common Stock	28,884	$8.60	$248,434	24,391,273
2021-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Other disposed transaction J · derivative	Restricted Stock Unit	2,038	$0.00	$0	10,728
2021-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Exercise / conversion M · derivative	Restricted Stock Unit	3,324	$0.00	$0	12,766
2021-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Exercise / conversion M · derivative	Restricted Stock Unit	2,681	$0.00	$0	5,364
2021-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Other disposed transaction F	Common Stock	1,441	$338.24	$487,404	3,423
2021-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Exercise / conversion M	Common Stock	3,324	$338.24	$1,124,310	4,864
2021-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Other disposed transaction F	Common Stock	1,141	$338.24	$385,932	1,540
2021-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Exercise / conversion M	Common Stock	2,681	$338.24	$906,821	2,681
2021-08-09	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Equity grant / award G	Common Stock	523	$0.00	$0	41,053
2021-07-01	DENNER ALEXANDER J	Dir	Equity grant / award A	Common Stock	775	$0.00	$0	13,729
2021-06-07	Sandrock Alfred	Head of Research & Development	Open-market sell S	Common Stock	7,672	$440.00	$3,375,680	10,169
2021-06-04	Posner Brian S	Dir	Open-market sell S	Common Stock	360	$274.17	$98,701	7,400
2021-02-18	Vounatsos Michel	Chief Executive Officer	Equity grant / award A · derivative	Restricted Stock Unit	45,310	$0.00	$0	45,310
2021-02-12	Vounatsos Michel	Chief Executive Officer	Other disposed transaction J · derivative	Restricted Stock Unit	7,221	$0.00	$0	25,122
2021-02-12	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M · derivative	Restricted Stock Unit	5,337	$0.00	$0	32,343
2021-02-12	Vounatsos Michel	Chief Executive Officer	Other disposed transaction J · derivative	Restricted Stock Unit	7,263	$0.00	$0	12,526
2021-02-12	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M · derivative	Restricted Stock Unit	5,259	$0.00	$0	19,789
2021-02-12	Vounatsos Michel	Chief Executive Officer	Other disposed transaction J · derivative	Restricted Stock Unit	6,419	$0.00	$0	0
2021-02-12	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M · derivative	Restricted Stock Unit	5,693	$0.00	$0	6,419
2021-02-12	Vounatsos Michel	Chief Executive Officer	Other disposed transaction F	Common Stock	2,367	$278.03	$658,097	52,969
2021-02-12	Vounatsos Michel	Chief Executive Officer	Other disposed transaction F	Common Stock	2,333	$278.03	$648,644	55,336
2021-02-12	Vounatsos Michel	Chief Executive Officer	Other disposed transaction F	Common Stock	2,525	$278.03	$702,026	57,669
2021-02-12	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M	Common Stock	5,337	$0.00	$0	60,194
2021-02-12	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M	Common Stock	5,259	$0.00	$0	54,857
2021-02-12	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M	Common Stock	5,693	$0.00	$0	49,598
2021-02-12	Vounatsos Michel	Chief Executive Officer	Other disposed transaction F	Common Stock	7,248	$278.03	$2,015,161	43,905
2021-02-09	Mantas Jesus B	Dir	Open-market buy P	Common Stock	898	$267.00	$239,766	2,943
2021-01-27	ALEXANDER SUSAN H	EVP Chief Legal Off & Corp Sec	Equity grant / award A	Common Stock	4,545	$0.00	$0	41,117
2020-12-03	Kramer Robin	VP, Chief Accounting Officer	Other disposed transaction J · derivative	Restricted Stock Unit	102	$0.00	$0	178
2020-12-03	Kramer Robin	VP, Chief Accounting Officer	Exercise / conversion M · derivative	Restricted Stock Unit	74	$0.00	$0	280
2020-12-03	Kramer Robin	VP, Chief Accounting Officer	Other disposed transaction F	Common Stock	22	$244.09	$5,370	373
2020-12-03	Kramer Robin	VP, Chief Accounting Officer	Exercise / conversion M	Common Stock	74	$0.00	$0	395
2020-12-01	Guindo Chirfi	EVP Glob. Prod Strat and Comm	Other disposed transaction J · derivative	Restricted Stock Unit	693	$0.00	$0	0
2020-12-01	Guindo Chirfi	EVP Glob. Prod Strat and Comm	Exercise / conversion M · derivative	Restricted Stock Unit	481	$0.00	$0	693
2020-12-01	Guindo Chirfi	EVP Glob. Prod Strat and Comm	Other disposed transaction F	Common Stock	214	$243.16	$52,036	3,790
2020-12-01	Guindo Chirfi	EVP Glob. Prod Strat and Comm	Exercise / conversion M	Common Stock	481	$0.00	$0	4,004
2020-12-01	Guindo Chirfi	EVP Glob. Prod Strat and Comm	Other disposed transaction F	Common Stock	348	$243.16	$84,620	3,523
2020-11-30	Vounatsos Michel	Chief Executive Officer	Open-market buy P	Common Stock	3,100	$241.31	$748,047	34,810
2020-11-04	Sandrock Alfred	EVP, Research & Development	Open-market sell S	Common Stock	1,500	$350.00	$525,000	13,066
2020-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Equity grant / award A · derivative	Restricted Stock Unit	16,090	$0.00	$0	16,090
2020-09-01	MCDONNELL MICHAEL R	EVP, Chief Financial Officer	Equity grant / award A · derivative	Restricted Stock Unit	8,045	$0.00	$0	8,045
2020-07-31	Gregory Ginger	EVP, Human Resources	Other disposed transaction J · derivative	Restricted Stock Unit	216	$0.00	$0	0
2020-07-31	Gregory Ginger	EVP, Human Resources	Exercise / conversion M · derivative	Restricted Stock Unit	212	$0.00	$0	216
2020-07-31	Gregory Ginger	EVP, Human Resources	Other disposed transaction F	Common Stock	95	$274.69	$26,096	4,691
2020-07-31	Gregory Ginger	EVP, Human Resources	Exercise / conversion M	Common Stock	212	$0.00	$0	4,786
2020-07-31	Gregory Ginger	EVP, Human Resources	Other disposed transaction F	Common Stock	128	$274.69	$35,160	4,574
2020-07-01	Kramer Robin	VP, Chief Accounting Officer	Equity grant / award A · derivative	Restricted Stock Unit	755	$0.00	$0	755
2020-06-03	SHERWIN STEPHEN A	Dir	Equity grant / award A	Common Stock	890	$0.00	$0	16,328
2020-03-11	SHERWIN STEPHEN A	Dir	Exercise / conversion M · derivative	Stock Option (Right to Buy)	1,355	—	$81,056	0
2020-03-11	SHERWIN STEPHEN A	Dir	Exercise / conversion M · derivative	Stock Option (Right to Buy)	10,923	—	$653,414	0
2020-03-11	SHERWIN STEPHEN A	Dir	Open-market sell S	Common Stock	270	$295.29	$79,728	15,438
2020-03-11	SHERWIN STEPHEN A	Dir	Exercise / conversion M	Common Stock	1,355	$58.46	$79,213	15,708
2020-03-11	SHERWIN STEPHEN A	Dir	Open-market sell S	Common Stock	2,164	$295.21	$638,845	14,353
2020-03-11	SHERWIN STEPHEN A	Dir	Exercise / conversion M	Common Stock	10,923	$58.46	$638,559	16,517
2020-02-15	Vounatsos Michel	Chief Executive Officer	Other disposed transaction J · derivative	Restricted Stock Unit	3,657	$0.00	$0	0
2020-02-15	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M · derivative	Restricted Stock Unit	4,847	$0.00	$0	3,657
2020-02-15	Vounatsos Michel	Chief Executive Officer	Other disposed transaction F	Common Stock	2,150	$333.00	$715,950	31,625
2020-02-15	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M	Common Stock	4,847	$0.00	$0	33,775
2020-02-12	Kramer Robin	VP, Chief Accounting Officer	Equity grant / award A · derivative	Restricted Stock Unit	1,510	$0.00	$0	1,510
2020-02-12	Kramer Robin	VP, Chief Accounting Officer	Other disposed transaction J · derivative	Restricted Stock Unit	154	$0.00	$0	574
2020-02-12	Kramer Robin	VP, Chief Accounting Officer	Exercise / conversion M · derivative	Restricted Stock Unit	132	$0.00	$0	728
2020-02-12	Kramer Robin	VP, Chief Accounting Officer	Other disposed transaction F	Common Stock	46	$331.76	$15,261	236
2020-02-12	Kramer Robin	VP, Chief Accounting Officer	Exercise / conversion M	Common Stock	132	$0.00	$0	282
2020-01-02	CAPELLO JEFFREY D	EVP & Chief Financial Officer	Other disposed transaction J · derivative	Restricted Stock Unit	1,690	$0.00	$0	2,996
2020-01-02	CAPELLO JEFFREY D	EVP & Chief Financial Officer	Exercise / conversion M · derivative	Restricted Stock Unit	1,302	$0.00	$0	4,686
2020-01-02	CAPELLO JEFFREY D	EVP & Chief Financial Officer	Other disposed transaction F	Common Stock	406	$294.20	$119,445	1,813
2020-01-02	CAPELLO JEFFREY D	EVP & Chief Financial Officer	Exercise / conversion M	Common Stock	1,302	$0.00	$0	2,219
2019-12-03	Kramer Robin	VP, Chief Accounting Officer	Other disposed transaction J · derivative	Restricted Stock Unit	92	$0.00	$0	354
2019-12-03	Kramer Robin	VP, Chief Accounting Officer	Exercise / conversion M · derivative	Restricted Stock Unit	84	$0.00	$0	446
2019-12-03	Kramer Robin	VP, Chief Accounting Officer	Other disposed transaction F	Common Stock	25	$290.70	$7,268	150
2019-12-03	Kramer Robin	VP, Chief Accounting Officer	Exercise / conversion M	Common Stock	84	$0.00	$0	175
2019-12-02	Posner Brian S	Dir	Open-market sell S	Common Stock	1,055	$292.35	$308,429	6,995
2019-12-01	Guindo Chirfi	EVP Glob. Prod Strat and Comm	Other disposed transaction J · derivative	Restricted Stock Unit	625	$0.00	$0	1,174
2019-12-01	Guindo Chirfi	EVP Glob. Prod Strat and Comm	Exercise / conversion M · derivative	Restricted Stock Unit	543	$0.00	$0	1,799
2019-12-01	Guindo Chirfi	EVP Glob. Prod Strat and Comm	Other disposed transaction F	Common Stock	160	$299.81	$47,970	2,695
2019-12-01	Guindo Chirfi	EVP Glob. Prod Strat and Comm	Exercise / conversion M	Common Stock	543	$0.00	$0	2,855
2019-12-01	Guindo Chirfi	EVP Glob. Prod Strat and Comm	Other disposed transaction F	Common Stock	231	$299.81	$69,256	2,312
2019-08-01	Gregory Ginger	EVP, Human Resources	Other disposed transaction J · derivative	Restricted Stock Unit	247	$0.00	$0	428
2019-08-01	Gregory Ginger	EVP, Human Resources	Exercise / conversion M · derivative	Restricted Stock Unit	179	$0.00	$0	675
2019-08-01	Gregory Ginger	EVP, Human Resources	Other disposed transaction F	Common Stock	80	$243.06	$19,445	2,215
2019-08-01	Gregory Ginger	EVP, Human Resources	Exercise / conversion M	Common Stock	179	$0.00	$0	2,295
2019-08-01	Gregory Ginger	EVP, Human Resources	Other disposed transaction F	Common Stock	128	$243.06	$31,112	2,116
2019-07-02	Karp Daniel	EVP, Corporate Development	Other disposed transaction J · derivative	Restricted Stock Unit	390	$0.00	$0	1,174
2019-07-02	Karp Daniel	EVP, Corporate Development	Exercise / conversion M · derivative	Restricted Stock Unit	196	$0.00	$0	1,564
2019-07-02	Karp Daniel	EVP, Corporate Development	Other disposed transaction F	Common Stock	58	$236.37	$13,709	264
2019-07-02	Karp Daniel	EVP, Corporate Development	Exercise / conversion M	Common Stock	196	$0.00	$0	322
2019-06-19	Mantas Jesus B	Dir	Equity grant / award A	Common Stock	1,155	$0.00	$0	1,155
2019-06-01	Ehlers Michael D	EVP, Research and Development	Other disposed transaction J · derivative	Restricted Stock Unit	1,376	$0.00	$0	0
2019-06-01	Ehlers Michael D	EVP, Research and Development	Exercise / conversion M · derivative	Restricted Stock Unit	1,126	$0.00	$0	1,376
2019-06-01	Ehlers Michael D	EVP, Research and Development	Other disposed transaction F	Common Stock	500	$219.29	$109,645	8,025
2019-06-01	Ehlers Michael D	EVP, Research and Development	Exercise / conversion M	Common Stock	1,126	$0.00	$0	8,525
2019-06-01	Ehlers Michael D	EVP, Research and Development	Other disposed transaction F	Common Stock	460	$219.29	$100,873	7,399
2019-05-02	DENNER ALEXANDER J	Dir	Open-market buy P	Common Stock	38,000	$231.24	$8,787,120	643,000
2019-05-02	Vounatsos Michel	Chief Executive Officer	Other disposed transaction J · derivative	Restricted Stock Unit	1,772	$0.00	$0	0
2019-05-02	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M · derivative	Restricted Stock Unit	1,480	$0.00	$0	1,772
2019-05-02	Vounatsos Michel	Chief Executive Officer	Other disposed transaction F	Common Stock	658	$230.52	$151,682	21,829
2019-05-02	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M	Common Stock	1,480	$0.00	$0	22,487
2019-05-01	DENNER ALEXANDER J	Dir	Open-market buy P	Common Stock	30,000	$229.46	$6,883,800	605,000
2019-05-01	Vounatsos Michel	Chief Executive Officer	Open-market buy P	Common Stock	4,351	$231.48	$1,007,169	21,007
2019-04-30	DENNER ALEXANDER J	Dir	Open-market buy P	Common Stock	50,342	$229.25	$11,540,904	575,000
2019-03-18	PANGIA ROBERT W	Dir	Exercise / conversion M · derivative	Stock Option (Right to Buy)	6,114	—	$326,671	0
2019-03-18	PANGIA ROBERT W	Dir	Open-market sell S	Common Stock	6,114	$328.55	$2,008,755	18,587
2019-03-18	PANGIA ROBERT W	Dir	Exercise / conversion M	Common Stock	6,114	$52.22	$319,273	24,701
2019-03-01	McKenzie Paul	EVP Pharmaceutical Oper & Tech	Other disposed transaction J · derivative	Restricted Stock Unit	280	$0.00	$0	0
2019-03-01	McKenzie Paul	EVP Pharmaceutical Oper & Tech	Exercise / conversion M · derivative	Restricted Stock Unit	568	$0.00	$0	280
2019-03-01	McKenzie Paul	EVP Pharmaceutical Oper & Tech	Other disposed transaction F	Common Stock	253	$334.10	$84,527	7,235
2019-03-01	McKenzie Paul	EVP Pharmaceutical Oper & Tech	Exercise / conversion M	Common Stock	568	$0.00	$0	7,488
2019-03-01	McKenzie Paul	EVP Pharmaceutical Oper & Tech	Other disposed transaction F	Common Stock	405	$334.10	$135,310	6,920
2019-02-22	ALEXANDER SUSAN H	EVP Chief Legal Officer & Sec.	Exercise / conversion M · derivative	Stock Option (Right to Buy)	6,395	—	$317,512	0
2019-02-22	ALEXANDER SUSAN H	EVP Chief Legal Officer & Sec.	Other disposed transaction J · derivative	Restricted Stock Unit	819	$0.00	$0	0
2019-02-22	ALEXANDER SUSAN H	EVP Chief Legal Officer & Sec.	Exercise / conversion M · derivative	Restricted Stock Unit	1,663	$0.00	$0	819
2019-02-22	ALEXANDER SUSAN H	EVP Chief Legal Officer & Sec.	Other disposed transaction F	Common Stock	739	$325.33	$240,419	31,976
2019-02-22	ALEXANDER SUSAN H	EVP Chief Legal Officer & Sec.	Other disposed transaction F	Common Stock	3,370	$325.33	$1,096,362	32,715
2019-02-22	ALEXANDER SUSAN H	EVP Chief Legal Officer & Sec.	Exercise / conversion M	Common Stock	6,395	$48.52	$310,285	36,085
2019-02-22	ALEXANDER SUSAN H	EVP Chief Legal Officer & Sec.	Exercise / conversion M	Common Stock	1,663	$0.00	$0	29,690
2019-02-15	Vounatsos Michel	Chief Executive Officer	Other disposed transaction J · derivative	Restricted Stock Unit	3,229	$0.00	$0	8,504
2019-02-15	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M · derivative	Restricted Stock Unit	5,269	$0.00	$0	11,733
2019-02-15	Vounatsos Michel	Chief Executive Officer	Other disposed transaction F	Common Stock	2,340	$332.87	$778,916	16,574
2019-02-15	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M	Common Stock	5,269	$0.00	$0	18,914
2019-02-14	Posner Brian S	Dir	Equity grant / award G	Common Stock	315	$0.00	$0	6,895
2019-02-12	Vounatsos Michel	Chief Executive Officer	Equity grant / award A · derivative	Restricted Stock Unit	37,570	$0.00	$0	37,570
2019-02-12	Vounatsos Michel	Chief Executive Officer	Other disposed transaction J · derivative	Restricted Stock Unit	5,205	$0.00	$0	24,216
2019-02-12	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M · derivative	Restricted Stock Unit	6,899	$0.00	$0	29,421
2019-02-12	Vounatsos Michel	Chief Executive Officer	Other disposed transaction F	Common Stock	2,622	$319.43	$837,545	13,645
2019-02-12	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M	Common Stock	6,899	$0.00	$0	16,267
2019-02-01	DENNER ALEXANDER J	Dir	Open-market buy P	Common Stock	7,000	$328.45	$2,299,163	524,658
2019-01-31	DENNER ALEXANDER J	Dir	Open-market buy P	Common Stock	25,800	$330.52	$8,527,393	517,658
2019-01-30	DENNER ALEXANDER J	Dir	Open-market buy P	Common Stock	30,000	$324.86	$9,745,851	491,858
2019-01-02	CAPELLO JEFFREY D	EVP & Chief Financial Officer	Other disposed transaction J · derivative	Restricted Stock Unit	1,661	$0.00	$0	5,988
2019-01-02	CAPELLO JEFFREY D	EVP & Chief Financial Officer	Exercise / conversion M · derivative	Restricted Stock Unit	1,331	$0.00	$0	7,649
2019-01-02	CAPELLO JEFFREY D	EVP & Chief Financial Officer	Other disposed transaction F	Common Stock	414	$304.69	$126,142	917
2019-01-02	CAPELLO JEFFREY D	EVP & Chief Financial Officer	Exercise / conversion M	Common Stock	1,331	$0.00	$0	1,331
2018-12-03	Kramer Robin	VP, Chief Accounting Officer	Equity grant / award A · derivative	Restricted Stock Unit	265	$0.00	$0	265
2018-12-03	Kramer Robin	VP, Chief Accounting Officer	Equity grant / award A · derivative	Restricted Stock Unit	530	$0.00	$0	530
2018-12-01	Guindo Chirfi	EVP Glob. Mkt Acc & Cust Innov	Other disposed transaction J · derivative	Restricted Stock Unit	566	$0.00	$0	2,342
2018-12-01	Guindo Chirfi	EVP Glob. Mkt Acc & Cust Innov	Exercise / conversion M · derivative	Restricted Stock Unit	602	$0.00	$0	2,908
2018-12-01	Guindo Chirfi	EVP Glob. Mkt Acc & Cust Innov	Other disposed transaction F	Common Stock	178	$333.72	$59,402	2,543
2018-12-01	Guindo Chirfi	EVP Glob. Mkt Acc & Cust Innov	Exercise / conversion M	Common Stock	602	$0.00	$0	2,721
2018-12-01	Guindo Chirfi	EVP Glob. Mkt Acc & Cust Innov	Other disposed transaction F	Common Stock	231	$333.72	$77,089	2,119
2018-11-28	SCHENK LYNN	Dir	Equity grant / award G	Common Stock	32	$0.00	$0	7,877
2018-10-31	SHERWIN STEPHEN A	Dir	Equity grant / award G	Common Stock	175	$0.00	$0	5,164
2018-10-31	SHERWIN STEPHEN A	Dir	Equity grant / award G	Common Stock	200	$0.00	$0	5,339
2018-10-31	SHERWIN STEPHEN A	Dir	Equity grant / award G	Common Stock	275	$0.00	$0	5,739
2018-09-26	Ehlers Michael D	EVP, Research and Development	Open-market sell S	Common Stock	1,000	$350.00	$350,000	4,281
2018-08-01	Gregory Ginger	EVP, Human Resources	Other disposed transaction J · derivative	Restricted Stock Unit	164	$0.00	$0	854
2018-08-01	Gregory Ginger	EVP, Human Resources	Exercise / conversion M · derivative	Restricted Stock Unit	262	$0.00	$0	1,018
2018-08-01	Gregory Ginger	EVP, Human Resources	Other disposed transaction F	Common Stock	85	$344.06	$29,245	959
2018-08-01	Gregory Ginger	EVP, Human Resources	Other disposed transaction F	Common Stock	78	$344.06	$26,837	1,044
2018-08-01	Gregory Ginger	EVP, Human Resources	Exercise / conversion M	Common Stock	262	$0.00	$0	1,122
2018-07-02	Karp Daniel	EVP, Corporate Development	Equity grant / award A · derivative	Restricted Stock Unit	1,760	$0.00	$0	1,760
2018-06-12	DENNER ALEXANDER J	Dir	Equity grant / award A	Common Stock	880	$0.00	$0	10,909
2018-06-01	Ehlers Michael D	EVP, Research and Development	Other disposed transaction J · derivative	Restricted Stock Unit	1,110	$0.00	$0	2,502
2018-06-01	Ehlers Michael D	EVP, Research and Development	Exercise / conversion M · derivative	Restricted Stock Unit	1,384	$0.00	$0	3,612
2018-06-01	Ehlers Michael D	EVP, Research and Development	Other disposed transaction F	Common Stock	616	$297.09	$183,007	5,281
2018-06-01	Ehlers Michael D	EVP, Research and Development	Exercise / conversion M	Common Stock	1,384	$0.00	$0	5,897
2018-06-01	Ehlers Michael D	EVP, Research and Development	Other disposed transaction F	Common Stock	460	$297.09	$136,661	4,513
2018-05-02	Vounatsos Michel	Chief Executive Officer	Other disposed transaction J · derivative	Restricted Stock Unit	1,557	$0.00	$0	3,252
2018-05-02	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M · derivative	Restricted Stock Unit	1,687	$0.00	$0	4,809
2018-05-02	Vounatsos Michel	Chief Executive Officer	Other disposed transaction F	Common Stock	750	$274.13	$205,598	9,368
2018-05-02	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M	Common Stock	1,687	$0.00	$0	10,118
2018-04-25	DENNER ALEXANDER J	Dir	Open-market buy P	Common Stock	48,000	$269.91	$12,955,680	461,858
2018-03-01	McKenzie Paul	EVP Pharmaceutical Oper & Tech	Other disposed transaction J · derivative	Restricted Stock Unit	312	$0.00	$0	848
2018-03-01	McKenzie Paul	EVP Pharmaceutical Oper & Tech	Exercise / conversion M · derivative	Restricted Stock Unit	532	$0.00	$0	1,160
2018-03-01	McKenzie Paul	EVP Pharmaceutical Oper & Tech	Other disposed transaction F	Common Stock	237	$282.35	$66,917	4,302
2018-03-01	McKenzie Paul	EVP Pharmaceutical Oper & Tech	Exercise / conversion M	Common Stock	532	$0.00	$0	4,539
2018-03-01	McKenzie Paul	EVP Pharmaceutical Oper & Tech	Other disposed transaction F	Common Stock	405	$282.35	$114,352	4,007
2018-02-27	Sandrock Alfred	EVP, Chief Medical Officer	Open-market sell S	Common Stock	259	$290.83	$75,325	6,553
2018-02-23	Sandrock Alfred	EVP, Chief Medical Officer	Other disposed transaction J · derivative	Restricted Stock Unit	595	$0.00	$0	0
2018-02-23	Sandrock Alfred	EVP, Chief Medical Officer	Exercise / conversion M · derivative	Restricted Stock Unit	467	$0.00	$0	595
2018-02-23	Sandrock Alfred	EVP, Chief Medical Officer	Other disposed transaction F	Common Stock	208	$292.78	$60,898	6,812
2018-02-23	Sandrock Alfred	EVP, Chief Medical Officer	Exercise / conversion M	Common Stock	467	$0.00	$0	7,020
2018-02-23	Sandrock Alfred	EVP, Chief Medical Officer	Open-market sell S	Common Stock	908	$293.44	$266,444	6,553
2018-02-22	Sandrock Alfred	EVP, Chief Medical Officer	Other disposed transaction J · derivative	Restricted Stock Unit	843	$0.00	$0	2,482
2018-02-22	Sandrock Alfred	EVP, Chief Medical Officer	Exercise / conversion M · derivative	Restricted Stock Unit	1,635	$0.00	$0	3,325
2018-02-22	Sandrock Alfred	EVP, Chief Medical Officer	Other disposed transaction F	Common Stock	727	$284.81	$207,057	7,461
2018-02-22	Sandrock Alfred	EVP, Chief Medical Officer	Exercise / conversion M	Common Stock	1,635	$0.00	$0	8,188
2018-02-20	Sandrock Alfred	EVP, Chief Medical Officer	Open-market sell S	Common Stock	743	$292.00	$216,956	6,553
2018-02-15	Sandrock Alfred	EVP, Chief Medical Officer	Open-market sell S	Common Stock	1,294	$298.85	$386,712	7,296
2018-02-12	Ehlers Michael D	EVP, Research and Development	Equity grant / award A · derivative	Restricted Stock Unit	11,840	$0.00	$0	11,840
2018-02-12	Ehlers Michael D	EVP, Research and Development	Equity grant / award A · derivative	Restricted Stock Unit	4,735	$0.00	$0	4,735
2018-01-09	PANGIA ROBERT W	Dir	Exercise / conversion M · derivative	Stock Option (Right to Buy)	5,832	$0.00	$0	0
2018-01-09	PANGIA ROBERT W	Dir	Open-market sell S	Common Stock	5,832	$329.65	$1,922,519	17,707
2018-01-09	PANGIA ROBERT W	Dir	Exercise / conversion M	Common Stock	5,832	$57.83	$337,265	23,539
2018-01-02	CAPELLO JEFFREY D	EVP & Chief Financial Officer	Equity grant / award A · derivative	Performance Stock Unit	5,390	$0.00	$0	5,390
2018-01-02	CAPELLO JEFFREY D	EVP & Chief Financial Officer	Equity grant / award A · derivative	Restricted Stock Unit	8,980	$0.00	$0	8,980
2017-12-29	Vounatsos Michel	Chief Executive Officer	Open-market buy P	Common Stock	780	$320.55	$250,029	4,879
2017-12-01	Guindo Chirfi	EVP Glob. Mkt Acc & Cust Innov	Equity grant / award A · derivative	Restricted Stock Unit	1,755	$0.00	$0	1,755
2017-12-01	Guindo Chirfi	EVP Glob. Mkt Acc & Cust Innov	Equity grant / award A	Common Stock	2,350	$0.00	$0	2,350
2017-12-01	Guindo Chirfi	EVP Glob. Mkt Acc & Cust Innov	Equity grant / award A · derivative	Restricted Stock Unit	3,510	$0.00	$0	3,510
2017-11-29	DENNER ALEXANDER J	Dir	Open-market buy P	Common Stock	10,000	$319.84	$3,198,400	413,858
2017-11-29	SHERWIN STEPHEN A	Dir	Equity grant / award G	Common Stock	400	$0.00	$0	5,134
2017-11-29	SHERWIN STEPHEN A	Dir	Equity grant / award G	Common Stock	200	$0.00	$0	5,534
2017-11-29	SHERWIN STEPHEN A	Dir	Equity grant / award G	Common Stock	250	$0.00	$0	5,734
2017-11-28	DENNER ALEXANDER J	Dir	Open-market buy P	Common Stock	20,000	$316.12	$6,322,400	403,858
2017-08-31	DENNER ALEXANDER J	Dir	Equity grant / award A	Common Stock	933	$316.56	$295,350	383,858
2017-08-01	Gregory Ginger	EVP, Human Resources	Equity grant / award A · derivative	Restricted Stock Unit	1,280	$0.00	$0	1,280
2017-08-01	Gregory Ginger	EVP, Human Resources	Equity grant / award A	Common Stock	860	$0.00	$0	860
2017-07-25	ALEXANDER SUSAN H	EVP Chief Legal Corp Svc & Sec	Open-market sell S	Common Stock	4,974	$290.01	$1,442,510	22,258
2017-07-19	ALEXANDER SUSAN H	EVP Chief Legal Corp Svc & Sec	Open-market sell S	Common Stock	7,758	$285.00	$2,211,030	27,232
2017-07-03	Kress Jean-Paul	EVP Pres Int'l & Global Hd GTO	Equity grant / award A · derivative	Restricted Stock Unit	4,660	$0.00	$0	4,660
2017-06-09	Posner Brian S	Dir	Open-market sell S	Common Stock	1,084	$256.31	$277,840	6,330
2017-06-07	Rowinsky Eric K	Dir	Equity grant / award A	Common Stock	1,055	$0.00	$0	14,144
2017-06-01	Ehlers Michael D	EVP, Research and Development	Other disposed transaction J · derivative	Restricted Stock Unit	1,235	$0.00	$0	4,996
2017-06-01	Ehlers Michael D	EVP, Research and Development	Exercise / conversion M · derivative	Restricted Stock Unit	1,259	$0.00	$0	6,231
2017-06-01	Ehlers Michael D	EVP, Research and Development	Other disposed transaction F	Common Stock	411	$252.38	$103,728	3,616
2017-06-01	Ehlers Michael D	EVP, Research and Development	Exercise / conversion M	Common Stock	1,259	$0.00	$0	4,027
2017-06-01	Ehlers Michael D	EVP, Research and Development	Other disposed transaction F	Common Stock	336	$252.38	$84,800	2,768
2017-05-02	Vounatsos Michel	Chief Executive Officer	Other disposed transaction J · derivative	Restricted Stock Unit	1,508	$0.00	$0	6,496
2017-05-02	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M · derivative	Restricted Stock Unit	1,736	$0.00	$0	8,004
2017-05-02	Vounatsos Michel	Chief Executive Officer	Other disposed transaction F	Common Stock	564	$271.34	$153,036	4,099
2017-05-02	Vounatsos Michel	Chief Executive Officer	Exercise / conversion M	Common Stock	1,736	$0.00	$0	4,663
2017-05-01	Vounatsos Michel	Chief Executive Officer	Open-market buy P	Common Stock	1,402	$271.35	$380,433	2,927
2017-04-27	DENNER ALEXANDER J	Dir	Open-market buy P	Common Stock	58,858	$278.48	$16,390,776	383,858
2017-04-27	DENNER ALEXANDER J	Dir	Open-market buy P	Common Stock	15,000	$278.58	$4,178,700	325,000
2017-04-25	Clancy Paul J	Executive VP and CFO	Open-market sell S	Common Stock	9,892	$290.00	$2,868,680	10,813
2017-04-03	Sandrock Alfred	EVP CMO Neuro & Neurodegenerat	Open-market sell S	Common Stock	1,981	$274.08	$542,952	7,060
2017-03-13	Clancy Paul J	Executive VP and CFO	Open-market sell S	Common Stock	9,891	$291.55	$2,883,721	20,705
2017-03-01	McKenzie Paul	EVP Pharmaceutical Oper & Tech	Other disposed transaction J · derivative	Restricted Stock Unit	363	$0.00	$0	1,692
2017-03-01	McKenzie Paul	EVP Pharmaceutical Oper & Tech	Exercise / conversion M · derivative	Restricted Stock Unit	481	$0.00	$0	2,055
2017-03-01	McKenzie Paul	EVP Pharmaceutical Oper & Tech	Equity grant / award A	Common Stock	2,730	$0.00	$0	3,291
2017-03-01	McKenzie Paul	EVP Pharmaceutical Oper & Tech	Other disposed transaction F	Common Stock	157	$293.26	$46,042	561
2017-03-01	McKenzie Paul	EVP Pharmaceutical Oper & Tech	Exercise / conversion M	Common Stock	481	$0.00	$0	718
2017-02-28	Clancy Paul J	Executive VP and CFO	Exercise / conversion M · derivative	Restricted Stock Unit	2,873	$0.00	$0	0
2017-02-28	Clancy Paul J	Executive VP and CFO	Exercise / conversion M · derivative	Restricted Stock Unit	1,152	$0.00	$0	0
2017-02-28	Clancy Paul J	Executive VP and CFO	Exercise / conversion M · derivative	Restricted Stock Unit	2,092	$0.00	$0	7,546
2017-02-28	Clancy Paul J	Executive VP and CFO	Exercise / conversion M · derivative	Restricted Stock Unit	663	$0.00	$0	1,774
2017-02-28	Clancy Paul J	Executive VP and CFO	Other disposed transaction J · derivative	Restricted Stock Unit	1,105	$0.00	$0	2,437
2017-02-28	Clancy Paul J	Executive VP and CFO	Other disposed transaction J · derivative	Restricted Stock Unit	1,678	$0.00	$0	9,638
2017-02-28	Clancy Paul J	Executive VP and CFO	Other disposed transaction J · derivative	Restricted Stock Unit	1,352	$0.00	$0	1,152
2017-02-28	Clancy Paul J	Executive VP and CFO	Other disposed transaction F	Common Stock	1,352	$274.76	$371,476	30,596
2017-02-28	Clancy Paul J	Executive VP and CFO	Exercise / conversion M	Common Stock	2,873	$0.00	$0	31,948
2017-02-28	Clancy Paul J	Executive VP and CFO	Other disposed transaction F	Common Stock	543	$274.76	$149,195	29,075
2017-02-28	Clancy Paul J	Executive VP and CFO	Exercise / conversion M	Common Stock	1,152	$0.00	$0	29,618
2017-02-28	Clancy Paul J	Executive VP and CFO	Other disposed transaction F	Common Stock	847	$287.63	$243,623	28,466
2017-02-28	Clancy Paul J	Executive VP and CFO	Exercise / conversion M	Common Stock	2,092	$0.00	$0	29,313
2017-02-28	Clancy Paul J	Executive VP and CFO	Other disposed transaction F	Common Stock	312	$284.75	$88,842	27,221
2017-02-28	Clancy Paul J	Executive VP and CFO	Exercise / conversion M	Common Stock	663	$0.00	$0	27,533
2017-02-27	Vounatsos Michel	Chief Executive Officer	Open-market buy P	Common Stock	1,333	$285.39	$380,425	1,434
2017-02-15	ALEXANDER SUSAN H	EVP, Chief Legal Officer	Equity grant / award A · derivative	Restricted Stock Unit	8,160	$0.00	$0	8,160
2017-02-01	BIOGEN INC.	10%	Other disposed transaction J	Common Stock	107,975,968	$0.00	$0	0
2017-01-09	PANGIA ROBERT W	Dir	Exercise / conversion M · derivative	Stock Option (Right to Buy)	5,450	$0.00	$0	0
2017-01-09	PANGIA ROBERT W	Dir	Open-market sell S	Common Stock	5,450	$295.39	$1,609,876	16,628
2017-01-09	PANGIA ROBERT W	Dir	Exercise / conversion M	Common Stock	5,450	$52.22	$284,599	22,078
2016-12-01	Karaboutis Adriana	EVP, Tech, Bus. Sol & Corp Aff	Open-market sell S	Common Stock	48	$296.53	$14,233	7,360
2016-12-01	Karaboutis Adriana	EVP, Tech, Bus. Sol & Corp Aff	Other disposed transaction F	Common Stock	171	$295.78	$50,578	7,408
2016-11-08	SHERWIN STEPHEN A	Dir	Equity grant / award G	Common Stock	1,000	$0.00	$0	4,905
2016-10-04	Karaboutis Adriana	EVP, Tech, Bus. Sol & Corp Aff	Open-market sell S	Common Stock	262	$311.94	$81,728	7,579
2016-10-03	Karaboutis Adriana	EVP, Tech, Bus. Sol & Corp Aff	Open-market sell S	Common Stock	380	$313.00	$118,940	7,841
2016-10-01	Karaboutis Adriana	EVP, Tech, Bus. Sol & Corp Aff	Other disposed transaction J · derivative	Restricted Stock Unit	2,280	$0.00	$0	4,266
2016-10-01	Karaboutis Adriana	EVP, Tech, Bus. Sol & Corp Aff	Exercise / conversion M · derivative	Restricted Stock Unit	1,982	$0.00	$0	6,546
2016-10-01	Karaboutis Adriana	EVP, Tech, Bus. Sol & Corp Aff	Other disposed transaction F	Common Stock	933	$313.03	$292,057	8,221
2016-10-01	Karaboutis Adriana	EVP, Tech, Bus. Sol & Corp Aff	Exercise / conversion M	Common Stock	1,982	$0.00	$0	9,154
2016-10-01	Karaboutis Adriana	EVP, Tech, Bus. Sol & Corp Aff	Other disposed transaction F	Common Stock	955	$313.03	$298,944	7,172
2016-09-22	DORSA CAROLINE	Dir	Exercise / conversion M · derivative	Stock Option (Right to Buy)	25,000	$0.00	$0	0
2016-09-22	DORSA CAROLINE	Dir	Exercise / conversion M · derivative	Stock Option (Right to Buy)	2,570	$0.00	$0	0
2016-09-22	DORSA CAROLINE	Dir	Open-market sell S	Common Stock	27,570	$314.00	$8,656,980	17,093
2016-09-22	DORSA CAROLINE	Dir	Exercise / conversion M	Common Stock	25,000	$53.64	$1,341,000	44,663
2016-09-22	DORSA CAROLINE	Dir	Exercise / conversion M	Common Stock	2,570	$53.64	$137,855	19,663
2016-07-21	SCANGOS GEORGE A	Chief Executive Officer	Open-market sell S	Common Stock	157	$280.00	$43,960	54,779
2016-06-08	DENNER ALEXANDER J	Dir	Equity grant / award A	Common Stock	1,060	$0.00	$0	8,950
2016-06-06	Koppel Adam	EVP, Strategy and Bus. Dev.	Open-market sell S	Common Stock	555	$290.00	$160,950	2,402
2016-06-03	SCANGOS GEORGE A	Chief Executive Officer	Open-market sell S	Common Stock	842	$290.00	$244,180	54,936
2016-06-02	Koppel Adam	EVP, Strategy and Bus. Dev.	Other disposed transaction J · derivative	Restricted Stock Unit	1,969	$0.00	$0	3,616
2016-06-02	Koppel Adam	EVP, Strategy and Bus. Dev.	Exercise / conversion M · derivative	Restricted Stock Unit	1,643	$0.00	$0	5,585
2016-06-02	Koppel Adam	EVP, Strategy and Bus. Dev.	Other disposed transaction F	Common Stock	534	$289.73	$154,716	2,957
2016-06-02	Koppel Adam	EVP, Strategy and Bus. Dev.	Exercise / conversion M	Common Stock	1,643	$0.00	$0	3,491
2016-06-01	SCANGOS GEORGE A	Chief Executive Officer	Open-market sell S	Common Stock	487	$287.97	$140,241	55,778
2016-06-01	Ehlers Michael D	EVP, Research and Development	Equity grant / award A · derivative	Restricted Stock Unit	7,320	$0.00	$0	7,320
2016-06-01	Ehlers Michael D	EVP, Research and Development	Equity grant / award A	Common Stock	3,034	$0.00	$0	3,034
2016-05-31	SCANGOS GEORGE A	Chief Executive Officer	Open-market sell S	Common Stock	3,368	$290.00	$976,720	56,265
2016-05-25	SCANGOS GEORGE A	Chief Executive Officer	Open-market sell S	Common Stock	157	$280.00	$43,960	59,633
2016-05-02	Vounatsos Michel	EVP & Chief Commercial Officer	Equity grant / award A · derivative	Restricted Stock Unit	9,520	$0.00	$0	9,520
2016-05-01	COVINO GREGORY F	VP, Chief Accounting Officer	Exercise / conversion M · derivative	Restricted Stock Unit	348	$0.00	$0	0
2016-05-01	COVINO GREGORY F	VP, Chief Accounting Officer	Other disposed transaction F	Common Stock	113	$274.99	$31,074	3,007
2016-05-01	COVINO GREGORY F	VP, Chief Accounting Officer	Exercise / conversion M	Common Stock	348	$0.00	$0	3,120

Regulatory Activity

Last 12 months to 2025-04-29

Insider Filings (Forms 3/4/5) — 12 months

Material Event Filings (8-K) — 12 months

8-K Material Event Filing Activity

Monthly count

Insider Trading Activity (Forms 3/4/5)

Monthly count