Robeco Institutional Asset Management B.V.

Position in BIIB — Biogen Inc.

CIK 1418773 ROTTERDAM, P7

Back to BIIB Full portfolio

Position in BIIB

as of Mar 31, 2026 · filed Apr 21, 2026 Compact

Position Value

$139,912,689

+$32,398,991 QoQ

Shares Held

763,174

+24.9% QoQ

Ownership

0.517%

of shares outstanding

% of Portfolio

0.21%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 54.14571251117045.ToString("F0")% Shared 0.ToString("F0")% None 45.85428748882955.ToString("F0")%

Common Shares in BIIB Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - General

Healthcare · as of Mar 31, 2026

Robeco Institutional Asset Management B.V. holds $3,535,801,813 across 9 Drug Manufacturers - General names. BIIB ranks #9 (4.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ABBV	AbbVie Inc.	3,250,326	$706,913,401
2	LLY	ELI LILLY & Co	653,146	$600,744,096
3	GILD	Gilead Sciences, Inc.	3,354,394	$467,501,891
4	JNJ	Johnson & Johnson	1,721,249	$420,742,105
5	BMY	Bristol Myers Squibb Co	6,733,740	$408,401,331
6	PFE	Pfizer Inc	11,138,434	$312,767,226
7	MRK	Merck & Co., Inc.	2,322,293	$279,348,624
8	AMGN	Amgen Inc	566,919	$199,470,450

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	$139,912,689	763,174	+24.9%	Shares	Defined	2026-04-21
2025-12-31	$107,513,698	610,908	-9.0%	Shares	Defined	2026-01-23
2025-09-30	$94,001,244	671,054	+49.5%	Shares	Defined	2025-10-22
2025-06-30	$56,359,391	448,757	-1.1%	Shares	Defined	2025-07-18
2025-03-31	$62,060,908	453,529	+11.1%	Shares	Defined	2025-04-23
2024-12-31	$62,433,565	408,276	+48.6%	Shares	Defined	2025-01-23
2024-09-30	$53,249,398	274,708	+27.8%	Shares	Defined	2024-10-29
2024-06-30	$49,826,695	214,937	-7.2%	Shares	Defined	2024-07-23
2024-03-31	$49,921,795	231,516	-21.1%	Shares	Defined	2024-04-24
2023-12-31	$75,959,345	293,540	-14.1%	Shares	Defined	2024-02-14
2023-09-30	$87,848,588	341,810	-0.4%	Shares	Defined	2023-10-24
2023-06-30	$97,765,362	343,217	-5.0%	Shares	Defined	2023-07-24
2023-03-31	$100,493,109	361,447	+15.4%	Shares	Defined	2023-05-04
2022-12-31	$86,719,436	313,157	+1.7%	Shares	Defined	2023-02-07
2022-09-30	$82,186,872	307,816	+69.6%	Shares	Defined	2022-12-01
2022-06-30	$37,017,353	181,511	+2.2%	Shares	Defined	2022-12-01
2022-03-31	$37,401,717	177,596	-7.1%	Shares	Defined	2022-12-01
2021-12-31	$45,888,298	191,265	+11.1%	Shares	Defined	2022-12-01
2021-09-30	$48,719,841	172,161	+4.7%	Shares	Defined	2022-12-01
2021-06-30	$56,942,370	164,445	-40.3%	Shares	Defined	2022-12-01
2021-03-31	$77,096,022	275,589	-15.1%	Shares	Defined	2022-12-01
2020-12-31	$79,456,825	324,499	-42.4%	Shares	Defined	2022-12-01
2020-09-30	$159,730,562	563,066	+39.8%	Shares	Defined	2021-01-19
2020-06-30	$107,731,147	402,658	+55.2%	Shares	Defined	2021-01-19
2020-03-31	$82,084,158	259,448	—	Shares	Defined	2021-01-19
No filing history on record for this holder in this stock.