Biogen Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

WBAG:BIIB Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
02 Apr 24	Sell€18,402	Priya Singhal	Individual	93	€197.88
22 Feb 24	Sell€53,586	Priya Singhal	Individual	262	€204.53
15 Feb 24	Buy€94,117	Eric Rowinsky	Individual	455	€206.85

Insider Trading Volume

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of BIIB?
Owner Type	Number of Shares	Ownership Percentage
State or Government	140,368	0.0963%
Individual Insiders	349,512	0.24%
General Public	14,355,623	9.85%
Institutions	130,873,837	89.8%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 65.08% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
11.4%	The Vanguard Group, Inc.	16,678,507	€2.4b	0.47%	0.04%
11.2%	PRIMECAP Management Company	16,315,079	€2.3b	-0.14%	1.71%
10.5%	BlackRock, Inc.	15,347,041	€2.2b	5.56%	0.04%
5.04%	State Street Global Advisors, Inc.	7,344,960	€1.1b	3.51%	0.04%
4.23%	T. Rowe Price Group, Inc.	6,168,832	€883.2m	-19.8%	0.08%
3.52%	Wellington Management Group LLP	5,131,193	€734.7m	-0.68%	0.12%
2.48%	Geode Capital Management, LLC	3,613,020	€517.3m	1.32%	0.04%
2.42%	JP Morgan Asset Management	3,524,314	€504.6m	6.09%	0.06%
1.43%	Norges Bank Investment Management	2,078,745	€297.6m	0%	0.02%
1.2%	Beutel Goodman & Company Ltd.	1,744,154	€249.7m	-0.19%	1.17%
1.14%	UBS Asset Management AG	1,656,544	€237.2m	4.43%	0.02%
1.04%	Legal & General Investment Management Limited	1,511,506	€216.4m	-2.41%	0.04%
0.97%	Invesco Capital Management LLC	1,413,892	€202.4m	29.8%	0.08%
0.93%	Northern Trust Global Investments	1,353,135	€193.7m	-5.1%	0.03%
0.91%	Morgan Stanley, Investment Banking and Brokerage Investments	1,323,321	€189.5m	33.3%	0.02%
0.81%	RA Capital Management, L.P.	1,184,456	€169.6m	20.6%	2.15%
0.79%	Columbia Management Investment Advisers, LLC	1,150,486	€164.7m	-20.7%	0.04%
0.76%	Dimensional Fund Advisors LP	1,114,340	€159.6m	0.38%	0.03%
0.67%	BNY Asset Management	982,172	€140.6m	-19.5%	0.03%
0.65%	Renaissance Technologies LLC	952,706	€136.4m	54.1%	0.2%
0.63%	Charles Schwab Investment Management, Inc.	913,029	€130.7m	1.37%	0.02%
0.62%	JPMorgan Chase & Co, Private Banking and Investment Banking Investments	903,148	€129.3m	4.71%	0.03%
0.62%	Amundi Asset Management SAS	902,664	€129.2m	31.4%	0.03%
0.56%	OrbiMed Advisors LLC	813,000	€116.4m	-9.76%	1.71%
0.49%	Massachusetts Financial Services Company	711,184	€101.8m	29.6%	0.02%

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2024/12/26 02:45
End of Day Share Price	2024/12/23 00:00
Earnings	2024/09/30
Annual Earnings	2023/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more here.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on .

Analyst Sources

Biogen Inc. is covered by 74 analysts. 32 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
David Toung	Argus Research Company
Steven Chesney	Atlantic Equities LLP
Brian Skorney	Baird