Bank of Montreal’s Biogen BIIB Stock Holding History

Bank of Montreal’s Portfolio BIIB Stock Details BIIB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2024 Q1	–	Sell	-25,000	Closed	-$6.54M	–	3899
2023 Q4	$6.54M	Hold	25,000	–	–	﹤0.01%	1176
2023 Q3	$6.51M	Hold	25,000	–	–	﹤0.01%	1180
2023 Q2	$7.48M	Hold	25,000	–	–	﹤0.01%	1145
2023 Q1	$6.97M	Sell	25,000 -90,000	-78%	-$24.9M	﹤0.01%	1094
2022 Q4	$33.6M	Buy	115,000 +14,500	+14%	+$4.1M	0.01%	510
2022 Q3	$27.2K	Buy	+100,500	New	+$21.3M	0.01%	578
2022 Q2	–	Sell	-2,600	Closed	-$637K	–	4092
2022 Q1	$637K	Buy	+2,600	New	+$565K	﹤0.01%	2665
2019 Q1	–	Sell	-35,000	Closed	-$10.5M	–	4326
2018 Q4	$10.5M	Buy	+35,000	New	+$11.2M	0.01%	760

Other funds holding BIIB

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Norges Bank Oslo, Norway $1T AUM

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Amundi Paris, France $413B AUM 44.57% 1-Year Est. Return

Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Deutsche Bank Frankfurt Am Main Ge, Germany $344B AUM 42.99% 1-Year Est. Return

Pictet Asset Management Carouge, Switzerland $105B AUM 38.07% 1-Year Est. Return

Bank of Montreal's BIIB Position: Q2 2026 in Review

Bank of Montreal increased its Biogen (BIIB) stake by 34% in Q2 2026, buying an estimated $6.04M and bringing the position to 124,267 shares worth $26.8M. The position accounts for 0.01% of the portfolio, ranked #800.

Bank of Montreal first reported a position in BIIB in Q2 2013 and has held it in 53 quarters since. The position peaked at $123M in Q4 2018. 746 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

Bank of Montreal held 124,267 shares of Biogen worth $26.8M as of Q2 2026.
Bank of Montreal bought 31,558 Biogen shares in Q2 2026, an estimated $6.04M.
Biogen made up 0.01% of Bank of Montreal's portfolio in Q2 2026, its #800 holding.
Bank of Montreal first reported a position in Biogen in Q2 2013 and has held it in 53 quarters since.
Bank of Montreal's Biogen position peaked at $123M in Q4 2018.
746 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Bank of Montreal's 13F filing for Q2 2026, filed 12 Aug 2026.