CenterBook Partners LP

Position in BIIB — Biogen Inc.

CIK 1872738 GREENWICH, CT

Position in BIIB

as of Jun 30, 2026 · filed Aug 11, 2026 Compact

Position Value

$2,250,913

-$3,561,767 QoQ

Shares Held

10,418

-65.3% QoQ

Ownership

0.007%

of shares outstanding

% of Portfolio

0.11%

of 13F equity value

Holder Rank

#331

of 1,036 holders

Holding Since

Dec 2021

9 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Healthcare · as of Jun 30, 2026

CenterBook Partners LP holds $48,546,896 across 5 Drug Manufacturers - General names. BIIB ranks #5 (4.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	LLY	ELI LILLY & Co	23,135	$27,748,815
2	PFE	Pfizer Inc	459,030	$11,053,442
3	GILD	Gilead Sciences, Inc.	32,767	$4,139,782
4	BMY	Bristol Myers Squibb Co	58,208	$3,353,944
5	BIIB	Biogen Inc. This page	10,418	$2,250,913

9 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$2,250,913	10,418	-65.3%	Shares	Sole	2026-08-11
2024-09-30	$5,812,680	29,987	-47.2%	Shares	Sole	2024-11-14
2024-06-30	$13,173,866	56,828	+1333.2%	Shares	Sole	2024-08-12
2024-03-31	$854,972	3,965	+19.9%	Shares	Sole	2024-05-10
2023-12-31	$856,011	3,308	+91.7%	Shares	Sole	2024-02-13
2022-09-30	$460,842	1,726	-10.3%	Shares	Sole	2022-11-14
2022-06-30	$392,584	1,925	-36.6%	Shares	Sole	2022-08-15
2022-03-31	$639,381	3,036	-2.6%	Shares	Sole	2022-05-16
2021-12-31	$747,830	3,117	—	Shares	Sole	2022-02-11
No filing history on record for this holder in this stock.