Biogen Ownership | Who Owns Biogen?

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Biogen Ownership Summary

Biogen is owned by 86.94% institutional investors, 0.15% insiders, and 12.91% retail investors. Vanguard group is the largest institutional shareholder, holding 11.43% of BIIB shares. Vanguard PRIMECAP Inv is the top mutual fund, with 6.30% of its assets in Biogen shares.

BIIB Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Biogen	86.94%	0.15%	12.91%
Sector	Healthcare Stocks	49.73%	8.84%	41.43%
Industry	Drug Manufacturers - General Stocks	56.05%	0.09%	43.86%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	16.60M	11.43%	$3.85B
Primecap management co/ca/	16.34M	11.25%	$3.79B
Blackrock	14.54M	10.01%	$3.37B
State street	7.10M	4.89%	$1.64B
T. rowe price investment management	5.68M	3.91%	$1.32B
Wellington management group llp	5.17M	3.56%	$1.20B
Jpmorgan chase	4.71M	3.25%	$1.09B
Geode capital management	3.57M	2.46%	$824.55M
Norges bank	2.08M	1.43%	$481.89M
Price t rowe associates inc /md/	2.01M	1.39%	$466.29M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Sarissa capital management lp	643.00K	25.16%	$149.06M
Krensavage asset management	123.78K	13.18%	$28.70M
Palo alto investors lp	289.05K	7.76%	$67.01M
Orbimed advisors	900.90K	4.15%	$208.85M
Sector gamma as	43.98K	3.81%	$10.20M
Patient capital management	257.27K	3.17%	$59.64M
Orion investment	32.64K	3.01%	$7.57M
Ra capital management	982.14K	3.01%	$227.68M
Hillman capital management	35.95K	2.94%	$8.33M
Primecap management co/ca/	16.34M	2.74%	$3.79B

Top Buyers

Holder	Shares	% Assets	Change
Norges bank	2.08M	0.07%	2.08M
Ameriprise financial	1.45M	0.09%	651.35K
T. rowe price investment management	5.68M	0.83%	508.89K
Goldman sachs group	1.42M	0.06%	426.50K
Price t rowe associates inc /md/	2.01M	0.06%	421.78K

Top Sellers

Holder	Shares	% Assets	Change
Van eck associates	922.76K	0.30%	-814.58K
Deutsche bank ag\	653.67K	0.07%	-403.79K
Alyeska investment group	-	-	-401.00K
Camber capital management lp	-	-	-400.00K
Balyasny asset management	-	-	-394.89K

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	2.08M	0.07%	2.08M	$481.89M
Mirae asset global etfs	128.06K	0.07%	128.06K	$29.68M
J. safra sarasin	65.76K	0.28%	65.76K	$15.24M
Corebridge financial	48.41K	0.06%	48.41K	$11.22M
Tang capital management	35.00K	0.83%	35.00K	$8.11M

Sold Out

Holder	Change
Mcclarren financial advisors	-2.00
Financial gravity asset management	-3.00
Tfo-tdc	-3.00
Piscataqua savings bank	-3.00
Kayne anderson rudnick investment management	-3.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Sep 30, 2024	945	-2.68%	126,668,218	-1.13%	86	1.12%	346	-16.63%	374	11.31%
Jun 30, 2024	956	-3.34%	127,999,477	0.64%	88	1.15%	407	4.90%	333	-8.01%
Mar 31, 2024	989	-4.54%	127,188,969	-0.41%	87	1.13%	388	-8.06%	362	-1.90%
Dec 31, 2023	1,036	3.39%	127,711,696	4.26%	88	1.23%	422	1.69%	369	7.58%
Sep 30, 2023	1,002	-3.75%	122,495,002	-2.70%	84	1.12%	415	0.48%	343	-4.99%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard PRIMECAP Inv	9.18M	6.30%	24.39K
Vanguard Total Stock Mkt Idx Inv	4.60M	3.16%	-16.99K
Vanguard Health Care Inv	4.56M	3.13%	-
Vanguard Institutional 500 Index Trust	3.86M	2.65%	47.00K
Vanguard Mid Cap Index Institutional	3.09M	2.12%	5.60K
Invesco QQQ Trust	2.89M	1.98%	6.76K
Vanguard Capital Opportunity Inv	2.35M	1.61%	5.06K
SPDR® S&P 500® ETF Trust	1.79M	1.23%	-9.98K
Fidelity 500 Index	1.79M	1.23%	-3.10K
iShares Core S&P 500 ETF	1.64M	1.13%	5.07K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Dec 09, 2024	Singhal Priya	Head of Development	Sell	$17.29K
Sep 03, 2024	Singhal Priya	Head of Development	Sell	$88.02K
Apr 02, 2024	Singhal Priya	Head of Development	Sell	$19.82K
Feb 22, 2024	Singhal Priya	Head of Development	Sell	$57.96K
Feb 16, 2024	Singhal Priya	Head of Development	Sell	$23.92K

Insider Transactions Trends

Date	Buy	Sell
2024 Q4	-	1
2024 Q3	-	1
2024 Q2	-	1
2024 Q1	1	4
2023 Q4	-	1

BIIB Ownership FAQ

Who Owns Biogen?

Biogen shareholders are primarily institutional investors at 86.94%, followed by 0.15% insiders and 12.91% retail investors. The average institutional ownership in Biogen's industry, Drug Manufacturers - General Stocks, is 56.05%, which Biogen exceeds.

Who owns the most shares of Biogen?

Biogen’s largest shareholders are Vanguard group (16.6M shares, 11.43%), Primecap management co/ca/ (16.34M shares, 11.25%), and Blackrock (14.54M shares, 10.01%). Together, they hold 32.70% of Biogen’s total shares outstanding.

Does Blackrock own Biogen?

Yes, BlackRock owns 10.01% of Biogen, totaling 14.54M shares as of Jun 2024. This represents 0.08% of BlackRock's total assets, with a market value of 3.37B$. In the last quarter, BlackRock increased its holdings by 393.51K shares, a 2.78% change.

Who is Biogen’s biggest shareholder by percentage of total assets invested?

Sarissa capital management lp is Biogen’s biggest shareholder by percentage of total assets invested, with 25.16% of its assets in 643K Biogen shares, valued at 149.06M$.

Who is the top mutual fund holder of Biogen shares?

Vanguard PRIMECAP Inv is the top mutual fund holder of Biogen shares, with 6.30% of its total shares outstanding invested in 9.18M Biogen shares.

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