FMR LLC

Position in BIIB — Biogen Inc.

CIK 315066 BOSTON, MA

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Position in BIIB

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$2,348,006,489

+$689,148,863 QoQ

Shares Held

12,807,541

+35.9% QoQ

Ownership

8.68%

of shares outstanding

% of Portfolio

0.13%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 89.63228772798776.ToString("F0")% Shared 0.ToString("F0")% None 10.367712272012247.ToString("F0")%

Common Shares in BIIB Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - General

Healthcare · as of Mar 31, 2026

FMR LLC holds $65,159,031,340 across 17 Drug Manufacturers - General names. BIIB ranks #8 (3.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	LLY	ELI LILLY & Co	26,341,031	$24,227,690,080
2	GILD	Gilead Sciences, Inc.	71,906,290	$10,021,579,632
3	JNJ	Johnson & Johnson	24,771,828	$6,055,225,633
4	AZN	Astrazeneca PLC	29,601,724	$5,838,052,004
5	MRK	Merck & Co., Inc.	44,516,010	$5,354,830,840
6	ABBV	AbbVie Inc.	21,762,703	$4,733,170,273
7	GSK	GSK plc	67,661,646	$3,734,246,242
8	BIIB	Biogen Inc. This page	12,807,541	$2,348,006,489

All Filings in BIIB

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25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$2,348,006,489	12,807,541	+35.9%	Shares	Defined	2026-05-15
2025-12-31	$1,658,857,626	9,425,863	+632.0%	Shares	Defined	2026-02-17
2025-09-30	$180,389,418	1,287,760	-23.1%	Shares	Defined	2025-11-13
2025-06-30	$210,265,288	1,674,220	+27.9%	Shares	Defined	2025-08-14
2025-03-31	$179,100,022	1,308,828	+72.8%	Shares	Defined	2025-05-12
2024-12-31	$115,847,601	757,570	+98.7%	Shares	Defined	2025-02-13
2024-09-30	$73,894,518	381,214	-37.5%	Shares	Defined	2024-11-13
2024-06-30	$141,506,634	610,416	-1.7%	Shares	Defined	2024-08-13
2024-03-31	$133,873,882	620,850	-38.0%	Shares	Defined	2024-05-13
2023-12-31	$259,066,029	1,001,144	-26.4%	Shares	Defined	2024-02-13
2023-09-30	$349,803,715	1,361,051	-48.5%	Shares	Defined	2023-11-13
2023-06-30	$752,152,404	2,640,521	+50.7%	Shares	Defined	2023-08-11
2023-03-31	$487,279,268	1,752,614	+44.7%	Shares	Defined	2023-08-11
2022-12-31	$335,403,564	1,211,193	-18.0%	Shares	Defined	2023-02-13
2022-09-30	$394,153,944	1,476,232	+43.9%	Shares	Defined	2022-11-10
2022-06-30	$209,276,292	1,026,166	+164.5%	Shares	Defined	2022-08-12
2022-03-31	$81,706,480	387,970	+107.1%	Shares	Defined	2022-05-13
2021-12-31	$44,937,254	187,301	-84.1%	Shares	Defined	2022-02-14
2021-09-30	$333,235,722	1,177,553	-12.9%	Shares	Defined	2022-02-14
2021-06-30	$468,232,525	1,352,218	-29.4%	Shares	Defined	2021-08-13
2021-03-31	$535,781,675	1,915,216	-3.4%	Shares	Defined	2021-05-14
2020-12-31	$485,280,197	1,981,868	+82.7%	Shares	Defined	2021-02-08
2020-09-30	$307,743,439	1,084,826	-5.0%	Shares	Defined	2020-11-13
2020-06-30	$305,647,514	1,142,394	-47.8%	Shares	Defined	2020-08-24
2020-03-31	$692,187,552	2,187,836	—	Shares	Defined	2020-05-14
No filing history on record for this holder in this stock.